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514094f9 | 1 | <?xml version='1.0'?> |
3a54a157 | 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
0307f791 | 4 | <!-- SPDX-License-Identifier: LGPL-2.1+ --> |
eac684ef | 5 | |
d9b20454 ZJS |
6 | <refentry id="systemd.network" conditional='ENABLE_NETWORKD' |
7 | xmlns:xi="http://www.w3.org/2001/XInclude"> | |
eac684ef | 8 | |
798d3a52 ZJS |
9 | <refentryinfo> |
10 | <title>systemd.network</title> | |
11 | <productname>systemd</productname> | |
798d3a52 ZJS |
12 | </refentryinfo> |
13 | ||
14 | <refmeta> | |
15 | <refentrytitle>systemd.network</refentrytitle> | |
16 | <manvolnum>5</manvolnum> | |
17 | </refmeta> | |
18 | ||
19 | <refnamediv> | |
20 | <refname>systemd.network</refname> | |
21 | <refpurpose>Network configuration</refpurpose> | |
22 | </refnamediv> | |
23 | ||
24 | <refsynopsisdiv> | |
25 | <para><filename><replaceable>network</replaceable>.network</filename></para> | |
26 | </refsynopsisdiv> | |
27 | ||
28 | <refsect1> | |
29 | <title>Description</title> | |
30 | ||
d4de2b2a ZJS |
31 | <para>A plain ini-style text file that encodes network configuration for matching network interfaces, |
32 | used by | |
798d3a52 | 33 | <citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>. |
d4de2b2a ZJS |
34 | See <citerefentry><refentrytitle>systemd.syntax</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
35 | for a general description of the syntax.</para> | |
798d3a52 | 36 | |
bac150e9 ZJS |
37 | <para>The main network file must have the extension <filename>.network</filename>; other |
38 | extensions are ignored. Networks are applied to links whenever the links appear.</para> | |
39 | ||
dc0d4078 ZJS |
40 | <para>The <filename>.network</filename> files are read from the files located in the system network |
41 | directories <filename>/usr/lib/systemd/network</filename> and | |
42 | <filename>/usr/local/lib/systemd/network</filename>, the volatile runtime network directory | |
43 | <filename>/run/systemd/network</filename> and the local administration network directory | |
44 | <filename>/etc/systemd/network</filename>. All configuration files are collectively sorted and processed | |
45 | in lexical order, regardless of the directories in which they live. However, files with identical | |
46 | filenames replace each other. Files in <filename>/etc</filename> have the highest priority, files in | |
47 | <filename>/run</filename> take precedence over files with the same name under | |
48 | <filename>/usr</filename>. This can be used to override a system-supplied configuration file with a local | |
49 | file if needed. As a special case, an empty file (file size 0) or symlink with the same name pointing to | |
50 | <filename>/dev/null</filename> disables the configuration file entirely (it is "masked").</para> | |
bac150e9 ZJS |
51 | |
52 | <para>Along with the network file <filename>foo.network</filename>, a "drop-in" directory | |
53 | <filename>foo.network.d/</filename> may exist. All files with the suffix | |
54 | <literal>.conf</literal> from this directory will be parsed after the file itself is | |
55 | parsed. This is useful to alter or add configuration settings, without having to modify the main | |
56 | configuration file. Each drop-in file must have appropriate section headers.</para> | |
57 | ||
58 | <para>In addition to <filename>/etc/systemd/network</filename>, drop-in <literal>.d</literal> | |
59 | directories can be placed in <filename>/usr/lib/systemd/network</filename> or | |
60 | <filename>/run/systemd/network</filename> directories. Drop-in files in | |
61 | <filename>/etc</filename> take precedence over those in <filename>/run</filename> which in turn | |
62 | take precedence over those in <filename>/usr/lib</filename>. Drop-in files under any of these | |
b1e91af8 | 63 | directories take precedence over the main network file wherever located.</para> |
bac150e9 ZJS |
64 | |
65 | <para>Note that an interface without any static IPv6 addresses configured, and neither DHCPv6 | |
66 | nor IPv6LL enabled, shall be considered to have no IPv6 support. IPv6 will be automatically | |
67 | disabled for that interface by writing "1" to | |
68 | <filename>/proc/sys/net/ipv6/conf/<replaceable>ifname</replaceable>/disable_ipv6</filename>. | |
82ecb4c3 | 69 | </para> |
798d3a52 ZJS |
70 | </refsect1> |
71 | ||
72 | <refsect1> | |
73 | <title>[Match] Section Options</title> | |
74 | ||
75 | <para>The network file contains a <literal>[Match]</literal> | |
76 | section, which determines if a given network file may be applied | |
77 | to a given device; and a <literal>[Network]</literal> section | |
78 | specifying how the device should be configured. The first (in | |
79 | lexical order) of the network files that matches a given device | |
a22e1850 LP |
80 | is applied, all later files are ignored, even if they match as |
81 | well.</para> | |
798d3a52 | 82 | |
84ea567e YW |
83 | <para>A network file is said to match a network interface if all matches specified by the |
84 | <literal>[Match]</literal> section are satisfied. When a network file does not contain valid | |
85 | settings in <literal>[Match]</literal> section, then the file will match all interfaces and | |
86 | <command>systemd-networkd</command> warns about that. Hint: to avoid the warning and to make it | |
87 | clear that all interfaces shall be matched, add the following: | |
88 | <programlisting>Name=*</programlisting> | |
89 | The following keys are accepted:</para> | |
798d3a52 ZJS |
90 | |
91 | <variablelist class='network-directives'> | |
d9b20454 ZJS |
92 | <xi:include href="systemd.link.xml" xpointer="mac-address" /> |
93 | <xi:include href="systemd.link.xml" xpointer="permanent-mac-address" /> | |
94 | <xi:include href="systemd.link.xml" xpointer="path" /> | |
95 | <xi:include href="systemd.link.xml" xpointer="driver" /> | |
96 | <xi:include href="systemd.link.xml" xpointer="type" /> | |
97 | <xi:include href="systemd.link.xml" xpointer="property" /> | |
9310bf4b | 98 | |
798d3a52 ZJS |
99 | <varlistentry> |
100 | <term><varname>Name=</varname></term> | |
101 | <listitem> | |
572b21d9 YW |
102 | <para>A whitespace-separated list of shell-style globs matching the device name, as exposed |
103 | by the udev property <literal>INTERFACE</literal>, or device's alternative names. If the | |
104 | list is prefixed with a "!", the test is inverted.</para> | |
798d3a52 ZJS |
105 | </listitem> |
106 | </varlistentry> | |
44005bfb | 107 | |
78404d22 | 108 | <varlistentry> |
1bcefad9 | 109 | <term><varname>WLANInterfaceType=</varname></term> |
78404d22 YW |
110 | <listitem> |
111 | <para>A whitespace-separated list of wireless network type. Supported values are | |
112 | <literal>ad-hoc</literal>, <literal>station</literal>, <literal>ap</literal>, | |
113 | <literal>ap-vlan</literal>, <literal>wds</literal>, <literal>monitor</literal>, | |
114 | <literal>mesh-point</literal>, <literal>p2p-client</literal>, <literal>p2p-go</literal>, | |
115 | <literal>p2p-device</literal>, <literal>ocb</literal>, and <literal>nan</literal>. If the | |
116 | list is prefixed with a "!", the test is inverted. | |
117 | </para> | |
118 | </listitem> | |
119 | </varlistentry> | |
d9b20454 | 120 | |
8d968fdd YW |
121 | <varlistentry> |
122 | <term><varname>SSID=</varname></term> | |
123 | <listitem> | |
124 | <para>A whitespace-separated list of shell-style globs matching the SSID of the currently | |
125 | connected wireless LAN. If the list is prefixed with a "!", the test is inverted. | |
126 | </para> | |
127 | </listitem> | |
128 | </varlistentry> | |
d9b20454 | 129 | |
277ba8d1 YW |
130 | <varlistentry> |
131 | <term><varname>BSSID=</varname></term> | |
132 | <listitem> | |
133 | <para>A whitespace-separated list of hardware address of the currently connected wireless | |
134 | LAN. Use full colon-, hyphen- or dot-delimited hexadecimal. See the example in | |
135 | <varname>MACAddress=</varname>. This option may appear more than one, in which case the | |
136 | lists are merged. If the empty string is assigned to this option, the list of BSSID defined | |
137 | prior to this is reset.</para> | |
138 | </listitem> | |
139 | </varlistentry> | |
d9b20454 ZJS |
140 | |
141 | <xi:include href="systemd.link.xml" xpointer="host" /> | |
142 | <xi:include href="systemd.link.xml" xpointer="virtualization" /> | |
143 | <xi:include href="systemd.link.xml" xpointer="kernel-command-line" /> | |
144 | <xi:include href="systemd.link.xml" xpointer="kernel-version" /> | |
145 | <xi:include href="systemd.link.xml" xpointer="architecture" /> | |
798d3a52 ZJS |
146 | </variablelist> |
147 | ||
148 | </refsect1> | |
149 | ||
150 | <refsect1> | |
151 | <title>[Link] Section Options</title> | |
152 | ||
153 | <para> The <literal>[Link]</literal> section accepts the following keys:</para> | |
154 | ||
155 | <variablelist class='network-directives'> | |
156 | <varlistentry> | |
157 | <term><varname>MACAddress=</varname></term> | |
158 | <listitem> | |
de25aae1 | 159 | <para>The hardware address to set for the device.</para> |
798d3a52 ZJS |
160 | </listitem> |
161 | </varlistentry> | |
162 | <varlistentry> | |
163 | <term><varname>MTUBytes=</varname></term> | |
164 | <listitem> | |
165 | <para>The maximum transmission unit in bytes to set for the | |
166 | device. The usual suffixes K, M, G, are supported and are | |
167 | understood to the base of 1024.</para> | |
439689c6 SS |
168 | <para>Note that if IPv6 is enabled on the interface, and the MTU is chosen |
169 | below 1280 (the minimum MTU for IPv6) it will automatically be increased to this value.</para> | |
798d3a52 ZJS |
170 | </listitem> |
171 | </varlistentry> | |
99d2baa2 SS |
172 | <varlistentry> |
173 | <term><varname>ARP=</varname></term> | |
174 | <listitem> | |
9b6ffef3 YW |
175 | <para>Takes a boolean. If set to true, the ARP (low-level Address Resolution Protocol) |
176 | for this interface is enabled. When unset, the kernel's default will be used.</para> | |
99d2baa2 SS |
177 | <para> For example, disabling ARP is useful when creating multiple MACVLAN or VLAN virtual |
178 | interfaces atop a single lower-level physical interface, which will then only serve as a | |
179 | link/"bridge" device aggregating traffic to the same physical link and not participate in | |
180 | the network otherwise.</para> | |
181 | </listitem> | |
182 | </varlistentry> | |
e6ebebbe SS |
183 | <varlistentry> |
184 | <term><varname>Multicast=</varname></term> | |
185 | <listitem> | |
9b6ffef3 | 186 | <para>Takes a boolean. If set to true, the multicast flag on the device is enabled.</para> |
866e6b7a SS |
187 | </listitem> |
188 | </varlistentry> | |
189 | <varlistentry> | |
190 | <term><varname>AllMulticast=</varname></term> | |
191 | <listitem> | |
9b6ffef3 | 192 | <para>Takes a boolean. If set to true, the driver retrieves all multicast packets from the network. |
866e6b7a | 193 | This happens when multicast routing is enabled.</para> |
e6ebebbe SS |
194 | </listitem> |
195 | </varlistentry> | |
a6f1848a SS |
196 | <varlistentry> |
197 | <term><varname>IPv6LinkLocalAddressGenerationMode=</varname></term> | |
198 | <listitem> | |
199 | <para>Specifies how IPv6 link local address is generated. Takes one of <literal>eui64</literal>, | |
200 | <literal>none</literal>, <literal>stable-privacy</literal> and <literal>random</literal>. | |
201 | When unset, the kernel's default will be used. Note that if <varname>LinkLocalAdressing=</varname> | |
202 | not configured as <literal>ipv6</literal> then <varname>IPv6LinkLocalAddressGenerationMode=</varname> | |
203 | is ignored.</para> | |
204 | </listitem> | |
205 | </varlistentry> | |
a09dc546 DM |
206 | <varlistentry> |
207 | <term><varname>Unmanaged=</varname></term> | |
208 | <listitem> | |
9b6ffef3 | 209 | <para>Takes a boolean. When <literal>yes</literal>, no attempts are |
a09dc546 DM |
210 | made to bring up or configure matching links, equivalent to |
211 | when there are no matching network files. Defaults to | |
212 | <literal>no</literal>.</para> | |
213 | <para>This is useful for preventing later matching network | |
214 | files from interfering with certain interfaces that are fully | |
215 | controlled by other applications.</para> | |
216 | </listitem> | |
217 | </varlistentry> | |
89fe6535 SS |
218 | <varlistentry> |
219 | <term><varname>Group=</varname></term> | |
220 | <listitem> | |
221 | <para>Link groups are similar to port ranges found in managed switches. | |
222 | When network interfaces are added to a numbered group, operations on | |
223 | all the interfaces from that group can be performed at once. An unsigned | |
224 | integer ranges 0 to 4294967294. Default to unset.</para> | |
225 | </listitem> | |
226 | </varlistentry> | |
c1a38904 MTL |
227 | <varlistentry> |
228 | <term><varname>RequiredForOnline=</varname></term> | |
229 | <listitem> | |
75cd4a5d DDM |
230 | <para>Takes a boolean or a minimum operational state and an optional maximum operational state. |
231 | Please see <citerefentry><refentrytitle>networkctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
8d6082e4 YW |
232 | for possible operational states. When <literal>yes</literal>, the network is deemed required when |
233 | determining whether the system is online when running | |
234 | <command>systemd-networkd-wait-online</command>. When <literal>no</literal>, the network is ignored | |
75cd4a5d DDM |
235 | when checking for online state. When a minimum operational state and an optional maximum operational |
236 | state are set, <literal>yes</literal> is implied, and this controls the minimum and maximum | |
237 | operational state required for the network interface to be considered online. | |
8d6082e4 YW |
238 | Defaults to <literal>yes</literal>.</para> |
239 | ||
c1a38904 MTL |
240 | <para>The network will be brought up normally in all cases, but in |
241 | the event that there is no address being assigned by DHCP or the | |
242 | cable is not plugged in, the link will simply remain offline and be | |
8d6082e4 | 243 | skipped automatically by <command>systemd-networkd-wait-online</command> |
ca92fe36 | 244 | if <literal>RequiredForOnline=no</literal>.</para> |
c1a38904 MTL |
245 | </listitem> |
246 | </varlistentry> | |
798d3a52 ZJS |
247 | </variablelist> |
248 | </refsect1> | |
249 | ||
250 | <refsect1> | |
251 | <title>[Network] Section Options</title> | |
252 | ||
253 | <para>The <literal>[Network]</literal> section accepts the following keys:</para> | |
254 | ||
255 | <variablelist class='network-directives'> | |
256 | <varlistentry> | |
257 | <term><varname>Description=</varname></term> | |
258 | <listitem> | |
259 | <para>A description of the device. This is only used for | |
260 | presentation purposes.</para> | |
261 | </listitem> | |
262 | </varlistentry> | |
263 | <varlistentry> | |
264 | <term><varname>DHCP=</varname></term> | |
265 | <listitem> | |
ad943783 | 266 | <para>Enables DHCPv4 and/or DHCPv6 client support. Accepts |
798d3a52 | 267 | <literal>yes</literal>, <literal>no</literal>, |
c702bd3b LY |
268 | <literal>ipv4</literal>, or <literal>ipv6</literal>. Defaults |
269 | to <literal>no</literal>.</para> | |
e88d8021 | 270 | |
f5a8c43f | 271 | <para>Note that DHCPv6 will by default be triggered by Router |
7f3fdb7f | 272 | Advertisement, if that is enabled, regardless of this parameter. |
f5a8c43f TG |
273 | By enabling DHCPv6 support explicitly, the DHCPv6 client will |
274 | be started regardless of the presence of routers on the link, | |
275 | or what flags the routers pass. See | |
f921f573 | 276 | <literal>IPv6AcceptRA=</literal>.</para> |
f5a8c43f TG |
277 | |
278 | <para>Furthermore, note that by default the domain name | |
e88d8021 ZJS |
279 | specified through DHCP is not used for name resolution. |
280 | See option <option>UseDomains=</option> below.</para> | |
2ef322fc | 281 | |
4f7331a8 YW |
282 | <para>See the <literal>[DHCPv4]</literal> or <literal>[DHCPv6]</literal> section below for |
283 | further configuration options for the DHCP client support.</para> | |
798d3a52 ZJS |
284 | </listitem> |
285 | </varlistentry> | |
286 | <varlistentry> | |
287 | <term><varname>DHCPServer=</varname></term> | |
288 | <listitem> | |
68b7f7ac | 289 | <para>Takes a boolean. If set to <literal>yes</literal>, DHCPv4 server will be started. Defaults |
ad943783 LP |
290 | to <literal>no</literal>. Further settings for the DHCP |
291 | server may be set in the <literal>[DHCPServer]</literal> | |
292 | section described below.</para> | |
798d3a52 ZJS |
293 | </listitem> |
294 | </varlistentry> | |
295 | <varlistentry> | |
56fd6bf7 | 296 | <term><varname>LinkLocalAddressing=</varname></term> |
798d3a52 | 297 | <listitem> |
85fc09c9 | 298 | <para>Enables link-local address autoconfiguration. Accepts <literal>yes</literal>, |
8bc17bb3 SS |
299 | <literal>no</literal>, <literal>ipv4</literal>, <literal>ipv6</literal>, |
300 | <literal>fallback</literal>, or <literal>ipv4-fallback</literal>. If | |
301 | <literal>fallback</literal> or <literal>ipv4-fallback</literal> is specified, then an IPv4 | |
302 | link-local address is configured only when DHCPv4 fails. If <literal>fallback</literal>, | |
303 | an IPv6 link-local address is always configured, and if <literal>ipv4-fallback</literal>, | |
304 | the address is not configured. Note that, the fallback mechanism works only when DHCPv4 | |
305 | client is enabled, that is, it requires <literal>DHCP=yes</literal> or | |
306 | <literal>DHCP=ipv4</literal>. If <varname>Bridge=</varname> is set, defaults to | |
307 | <literal>no</literal>, and if not, defaults to <literal>ipv6</literal>. | |
308 | </para> | |
798d3a52 ZJS |
309 | </listitem> |
310 | </varlistentry> | |
311 | <varlistentry> | |
312 | <term><varname>IPv4LLRoute=</varname></term> | |
313 | <listitem> | |
9b6ffef3 | 314 | <para>Takes a boolean. If set to true, sets up the route needed for |
798d3a52 ZJS |
315 | non-IPv4LL hosts to communicate with IPv4LL-only hosts. Defaults |
316 | to false. | |
317 | </para> | |
318 | </listitem> | |
319 | </varlistentry> | |
5d5003ab YW |
320 | <varlistentry> |
321 | <term><varname>DefaultRouteOnDevice=</varname></term> | |
322 | <listitem> | |
323 | <para>Takes a boolean. If set to true, sets up the default route bound to the interface. | |
324 | Defaults to false. This is useful when creating routes on point-to-point interfaces. | |
325 | This is equivalent to e.g. the following. | |
326 | <programlisting>ip route add default dev veth99</programlisting></para> | |
327 | </listitem> | |
328 | </varlistentry> | |
798d3a52 | 329 | <varlistentry> |
113bfde1 TG |
330 | <term><varname>IPv6Token=</varname></term> |
331 | <listitem> | |
8dcce054 KF |
332 | <para>Specifies an optional address generation mode and a required IPv6 address. If |
333 | the mode is present, the two parts must be separated with a colon | |
334 | <literal><replaceable>mode</replaceable>:<replaceable>address</replaceable></literal>. The | |
335 | address generation mode may be either <constant>prefixstable</constant> or | |
336 | <constant>static</constant>. If not specified, <constant>static</constant> is assumed. | |
337 | </para> | |
338 | <para>When the mode is set to <constant>static</constant>, or unspecified, the lower bits of | |
339 | the supplied address are combined with the upper bits of a prefix received in a Router Advertisement | |
340 | message to form a complete address. Note that if multiple prefixes are received in an RA message, or in | |
341 | multiple RA messages, addresses will be formed from each of them using the supplied address. This | |
342 | mode implements SLAAC but uses a static interface identifier instead of an identifier generated | |
343 | using the EUI-64 algorithm. Because the interface identifier is static, if Duplicate Address Detection | |
344 | detects that the computed address is a duplicate (in use by another node on the link), then this | |
345 | mode will fail to provide an address for that prefix. | |
8dcce054 KF |
346 | </para> |
347 | <para>When the mode is set to <literal>prefixstable</literal> the RFC 7217 algorithm for generating | |
348 | interface identifiers will be used, but only when a prefix received in an RA message matches the supplied address. | |
349 | See <ulink url="https://tools.ietf.org/html/rfc7217">RFC 7217</ulink>. Prefix matching will be attempted | |
350 | against each <constant>prefixstable</constant> IPv6Token variable provided in the configuration; if a received | |
351 | prefix does not match any of the provided addresses, then the EUI-64 algorithm will be used to form | |
352 | an interface identifier for that prefix. This mode is also SLAAC, but with a potentially stable interface | |
353 | identifier which does not directly map to the interface's hardware address. | |
354 | ||
355 | Note that the <constant>prefixstable</constant> algorithm includes both the interface's name and | |
356 | MAC address in the hash used to compute the interface identifier, so if either of those are changed the resulting | |
357 | interface identifier (and address) will change, even if the prefix received in the RA message has not changed. | |
358 | ||
359 | Note that if multiple <constant>prefixstable</constant> IPv6Token variables are supplied with addresses that | |
360 | match a prefix received in an RA message, only the first one will be used to generate addresses. | |
5f506a55 | 361 | </para> |
113bfde1 TG |
362 | </listitem> |
363 | </varlistentry> | |
364 | <varlistentry> | |
798d3a52 ZJS |
365 | <term><varname>LLMNR=</varname></term> |
366 | <listitem> | |
9b6ffef3 | 367 | <para>Takes a boolean or <literal>resolve</literal>. When true, |
aaa297d4 LP |
368 | enables <ulink |
369 | url="https://tools.ietf.org/html/rfc4795">Link-Local | |
370 | Multicast Name Resolution</ulink> on the link. When set to | |
371 | <literal>resolve</literal>, only resolution is enabled, | |
372 | but not host registration and announcement. Defaults to | |
373 | true. This setting is read by | |
374 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
375 | </listitem> | |
376 | </varlistentry> | |
377 | <varlistentry> | |
378 | <term><varname>MulticastDNS=</varname></term> | |
379 | <listitem> | |
9b6ffef3 | 380 | <para>Takes a boolean or <literal>resolve</literal>. When true, |
aaa297d4 LP |
381 | enables <ulink |
382 | url="https://tools.ietf.org/html/rfc6762">Multicast | |
383 | DNS</ulink> support on the link. When set to | |
384 | <literal>resolve</literal>, only resolution is enabled, | |
385 | but not host or service registration and | |
386 | announcement. Defaults to false. This setting is read by | |
387 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
798d3a52 ZJS |
388 | </listitem> |
389 | </varlistentry> | |
30e59c84 | 390 | <varlistentry> |
c9299be2 | 391 | <term><varname>DNSOverTLS=</varname></term> |
30e59c84 | 392 | <listitem> |
4310bfc2 IT |
393 | <para>Takes a boolean or <literal>opportunistic</literal>. |
394 | When true, enables | |
30e59c84 IT |
395 | <ulink |
396 | url="https://tools.ietf.org/html/rfc7858">DNS-over-TLS</ulink> | |
4310bfc2 IT |
397 | support on the link. |
398 | When set to <literal>opportunistic</literal>, compatibility with | |
399 | non-DNS-over-TLS servers is increased, by automatically | |
400 | turning off DNS-over-TLS servers in this case. | |
401 | This option defines a per-interface setting for | |
30e59c84 | 402 | <citerefentry><refentrytitle>resolved.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>'s |
c9299be2 | 403 | global <varname>DNSOverTLS=</varname> option. Defaults to |
30e59c84 IT |
404 | false. This setting is read by |
405 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
406 | </listitem> | |
407 | </varlistentry> | |
ad6c0475 LP |
408 | <varlistentry> |
409 | <term><varname>DNSSEC=</varname></term> | |
410 | <listitem> | |
9b6ffef3 | 411 | <para>Takes a boolean. or |
ad6c0475 LP |
412 | <literal>allow-downgrade</literal>. When true, enables |
413 | <ulink | |
414 | url="https://tools.ietf.org/html/rfc4033">DNSSEC</ulink> | |
415 | DNS validation support on the link. When set to | |
416 | <literal>allow-downgrade</literal>, compatibility with | |
417 | non-DNSSEC capable networks is increased, by automatically | |
785889e5 | 418 | turning off DNSSEC in this case. This option defines a |
ad6c0475 LP |
419 | per-interface setting for |
420 | <citerefentry><refentrytitle>resolved.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>'s | |
421 | global <varname>DNSSEC=</varname> option. Defaults to | |
422 | false. This setting is read by | |
423 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
424 | </listitem> | |
425 | </varlistentry> | |
8a516214 LP |
426 | <varlistentry> |
427 | <term><varname>DNSSECNegativeTrustAnchors=</varname></term> | |
428 | <listitem><para>A space-separated list of DNSSEC negative | |
429 | trust anchor domains. If specified and DNSSEC is enabled, | |
430 | look-ups done via the interface's DNS server will be subject | |
431 | to the list of negative trust anchors, and not require | |
432 | authentication for the specified domains, or anything below | |
433 | it. Use this to disable DNSSEC authentication for specific | |
434 | private domains, that cannot be proven valid using the | |
435 | Internet DNS hierarchy. Defaults to the empty list. This | |
436 | setting is read by | |
437 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> | |
438 | </listitem> | |
439 | </varlistentry> | |
798d3a52 ZJS |
440 | <varlistentry> |
441 | <term><varname>LLDP=</varname></term> | |
442 | <listitem> | |
da6c766d LP |
443 | <para>Controls support for Ethernet LLDP packet reception. LLDP is a link-layer protocol commonly |
444 | implemented on professional routers and bridges which announces which physical port a system is connected | |
445 | to, as well as other related data. Accepts a boolean or the special value | |
34437b4f LP |
446 | <literal>routers-only</literal>. When true, incoming LLDP packets are accepted and a database of all LLDP |
447 | neighbors maintained. If <literal>routers-only</literal> is set only LLDP data of various types of routers | |
448 | is collected and LLDP data about other types of devices ignored (such as stations, telephones and | |
7cececb2 | 449 | others). If false, LLDP reception is disabled. Defaults to <literal>routers-only</literal>. Use |
34437b4f | 450 | <citerefentry><refentrytitle>networkctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> to query the |
da6c766d LP |
451 | collected neighbor data. LLDP is only available on Ethernet links. See <varname>EmitLLDP=</varname> below |
452 | for enabling LLDP packet emission from the local system. | |
798d3a52 ZJS |
453 | </para> |
454 | </listitem> | |
455 | </varlistentry> | |
da6c766d LP |
456 | <varlistentry> |
457 | <term><varname>EmitLLDP=</varname></term> | |
458 | <listitem> | |
7272b25e LP |
459 | <para>Controls support for Ethernet LLDP packet emission. Accepts a boolean parameter or the special values |
460 | <literal>nearest-bridge</literal>, <literal>non-tpmr-bridge</literal> and | |
461 | <literal>customer-bridge</literal>. Defaults to false, which turns off LLDP packet emission. If not false, | |
462 | a short LLDP packet with information about the local system is sent out in regular intervals on the | |
38b38500 | 463 | link. The LLDP packet will contain information about the local hostname, the local machine ID (as stored |
7272b25e | 464 | in <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>) and the |
da6c766d LP |
465 | local interface name, as well as the pretty hostname of the system (as set in |
466 | <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>). LLDP | |
7272b25e LP |
467 | emission is only available on Ethernet links. Note that this setting passes data suitable for |
468 | identification of host to the network and should thus not be enabled on untrusted networks, where such | |
469 | identification data should not be made available. Use this option to permit other systems to identify on | |
470 | which interfaces they are connected to this system. The three special values control propagation of the | |
471 | LLDP packets. The <literal>nearest-bridge</literal> setting permits propagation only to the nearest | |
472 | connected bridge, <literal>non-tpmr-bridge</literal> permits propagation across Two-Port MAC Relays, but | |
473 | not any other bridges, and <literal>customer-bridge</literal> permits propagation until a customer bridge | |
474 | is reached. For details about these concepts, see <ulink | |
6a1bae83 | 475 | url="https://standards.ieee.org/findstds/standard/802.1AB-2016.html">IEEE 802.1AB-2016</ulink>. Note that |
7272b25e LP |
476 | configuring this setting to true is equivalent to <literal>nearest-bridge</literal>, the recommended and |
477 | most restricted level of propagation. See <varname>LLDP=</varname> above for an option to enable LLDP | |
478 | reception.</para> | |
da6c766d LP |
479 | </listitem> |
480 | </varlistentry> | |
e9a8c550 | 481 | |
0d4ad91d AR |
482 | <varlistentry> |
483 | <term><varname>BindCarrier=</varname></term> | |
484 | <listitem> | |
2ae7505f TG |
485 | <para>A link name or a list of link names. When set, controls the behavior of the current |
486 | link. When all links in the list are in an operational down state, the current link is brought | |
487 | down. When at least one link has carrier, the current interface is brought up. | |
0d4ad91d AR |
488 | </para> |
489 | </listitem> | |
490 | </varlistentry> | |
798d3a52 ZJS |
491 | <varlistentry> |
492 | <term><varname>Address=</varname></term> | |
493 | <listitem> | |
494 | <para>A static IPv4 or IPv6 address and its prefix length, | |
495 | separated by a <literal>/</literal> character. Specify | |
496 | this key more than once to configure several addresses. | |
497 | The format of the address must be as described in | |
3ba3a79d | 498 | <citerefentry project='man-pages'><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>. |
798d3a52 ZJS |
499 | This is a short-hand for an [Address] section only |
500 | containing an Address key (see below). This option may be | |
501 | specified more than once. | |
502 | </para> | |
503 | ||
e6ef3a13 YW |
504 | <para>If the specified address is <literal>0.0.0.0</literal> (for IPv4) or <literal>::</literal> |
505 | (for IPv6), a new address range of the requested size is automatically allocated from a | |
506 | system-wide pool of unused ranges. Note that the prefix length must be equal or larger than 8 for | |
507 | IPv4, and 64 for IPv6. The allocated range is checked against all current network interfaces and | |
508 | all known network configuration files to avoid address range conflicts. The default system-wide | |
509 | pool consists of 192.168.0.0/16, 172.16.0.0/12 and 10.0.0.0/8 for IPv4, and fd00::/8 for IPv6. | |
510 | This functionality is useful to manage a large number of dynamically created network interfaces | |
511 | with the same network configuration and automatic address range assignment.</para> | |
798d3a52 ZJS |
512 | |
513 | </listitem> | |
514 | </varlistentry> | |
515 | <varlistentry> | |
516 | <term><varname>Gateway=</varname></term> | |
517 | <listitem> | |
518 | <para>The gateway address, which must be in the format | |
519 | described in | |
3ba3a79d | 520 | <citerefentry project='man-pages'><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>. |
798d3a52 ZJS |
521 | This is a short-hand for a [Route] section only containing |
522 | a Gateway key. This option may be specified more than | |
523 | once.</para> | |
524 | </listitem> | |
525 | </varlistentry> | |
526 | <varlistentry> | |
527 | <term><varname>DNS=</varname></term> | |
528 | <listitem> | |
529 | <para>A DNS server address, which must be in the format | |
530 | described in | |
3ba3a79d | 531 | <citerefentry project='man-pages'><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>. |
f41b446a | 532 | This option may be specified more than once. This setting is read by |
3df9bec5 | 533 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
798d3a52 ZJS |
534 | </listitem> |
535 | </varlistentry> | |
536 | <varlistentry> | |
537 | <term><varname>Domains=</varname></term> | |
538 | <listitem> | |
cd517eb7 ZJS |
539 | <para>A whitespace-separated list of domains which should be resolved using the DNS servers on |
540 | this link. Each item in the list should be a domain name, optionally prefixed with a tilde | |
541 | (<literal>~</literal>). The domains with the prefix are called "routing-only domains". The | |
542 | domains without the prefix are called "search domains" and are first used as search suffixes for | |
38b38500 ZJS |
543 | extending single-label hostnames (hostnames containing no dots) to become fully qualified |
544 | domain names (FQDNs). If a single-label hostname is resolved on this interface, each of the | |
cd517eb7 ZJS |
545 | specified search domains are appended to it in turn, converting it into a fully qualified domain |
546 | name, until one of them may be successfully resolved.</para> | |
2df22529 | 547 | |
38b38500 | 548 | <para>Both "search" and "routing-only" domains are used for routing of DNS queries: look-ups for hostnames |
2df22529 ZJS |
549 | ending in those domains (hence also single label names, if any "search domains" are listed), are routed to |
550 | the DNS servers configured for this interface. The domain routing logic is particularly useful on | |
551 | multi-homed hosts with DNS servers serving particular private DNS zones on each interface.</para> | |
552 | ||
553 | <para>The "routing-only" domain <literal>~.</literal> (the tilde indicating definition of a routing domain, | |
554 | the dot referring to the DNS root domain which is the implied suffix of all valid DNS names) has special | |
555 | effect. It causes all DNS traffic which does not match another configured domain routing entry to be routed | |
556 | to DNS servers specified for this interface. This setting is useful to prefer a certain set of DNS servers | |
557 | if a link on which they are connected is available.</para> | |
3df9bec5 LP |
558 | |
559 | <para>This setting is read by | |
2df22529 ZJS |
560 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. |
561 | "Search domains" correspond to the <varname>domain</varname> and <varname>search</varname> entries in | |
98e9d710 | 562 | <citerefentry project='man-pages'><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. |
2df22529 ZJS |
563 | Domain name routing has no equivalent in the traditional glibc API, which has no concept of domain |
564 | name servers limited to a specific link.</para> | |
798d3a52 ZJS |
565 | </listitem> |
566 | </varlistentry> | |
7ece6f58 LP |
567 | <varlistentry> |
568 | <term><varname>DNSDefaultRoute=</varname></term> | |
569 | <listitem> | |
570 | <para>Takes a boolean argument. If true, this link's configured DNS servers are used for resolving domain | |
571 | names that do not match any link's configured <varname>Domains=</varname> setting. If false, this link's | |
572 | configured DNS servers are never used for such domains, and are exclusively used for resolving names that | |
573 | match at least one of the domains configured on this link. If not specified defaults to an automatic mode: | |
574 | queries not matching any link's configured domains will be routed to this link if it has no routing-only | |
575 | domains configured.</para> | |
576 | </listitem> | |
577 | </varlistentry> | |
798d3a52 ZJS |
578 | <varlistentry> |
579 | <term><varname>NTP=</varname></term> | |
580 | <listitem> | |
f41b446a | 581 | <para>An NTP server address. This option may be specified more than once. This setting is read by |
3df9bec5 | 582 | <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para> |
798d3a52 ZJS |
583 | </listitem> |
584 | </varlistentry> | |
585 | <varlistentry> | |
586 | <term><varname>IPForward=</varname></term> | |
765afd5c LP |
587 | <listitem><para>Configures IP packet forwarding for the |
588 | system. If enabled, incoming packets on any network | |
589 | interface will be forwarded to any other interfaces | |
9b6ffef3 YW |
590 | according to the routing table. Takes a boolean, |
591 | or the values <literal>ipv4</literal> or | |
765afd5c LP |
592 | <literal>ipv6</literal>, which only enable IP packet |
593 | forwarding for the specified address family. This controls | |
594 | the <filename>net.ipv4.ip_forward</filename> and | |
595 | <filename>net.ipv6.conf.all.forwarding</filename> sysctl | |
596 | options of the network interface (see <ulink | |
4046d836 LP |
597 | url="https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt">ip-sysctl.txt</ulink> |
598 | for details about sysctl options). Defaults to | |
599 | <literal>no</literal>.</para> | |
600 | ||
765afd5c LP |
601 | <para>Note: this setting controls a global kernel option, |
602 | and does so one way only: if a network that has this setting | |
603 | enabled is set up the global setting is turned on. However, | |
604 | it is never turned off again, even after all networks with | |
605 | this setting enabled are shut down again.</para> | |
606 | ||
607 | <para>To allow IP packet forwarding only between specific | |
608 | network interfaces use a firewall.</para> | |
4046d836 | 609 | </listitem> |
798d3a52 ZJS |
610 | </varlistentry> |
611 | <varlistentry> | |
612 | <term><varname>IPMasquerade=</varname></term> | |
613 | <listitem><para>Configures IP masquerading for the network | |
b938cb90 | 614 | interface. If enabled, packets forwarded from the network |
798d3a52 ZJS |
615 | interface will be appear as coming from the local host. |
616 | Takes a boolean argument. Implies | |
5c82dd13 | 617 | <varname>IPForward=ipv4</varname>. Defaults to |
4046d836 | 618 | <literal>no</literal>.</para></listitem> |
798d3a52 | 619 | </varlistentry> |
a46e37cb SS |
620 | <varlistentry> |
621 | <term><varname>IPv6PrivacyExtensions=</varname></term> | |
1f0d9695 LP |
622 | <listitem><para>Configures use of stateless temporary |
623 | addresses that change over time (see <ulink | |
624 | url="https://tools.ietf.org/html/rfc4941">RFC 4941</ulink>, | |
625 | Privacy Extensions for Stateless Address Autoconfiguration | |
626 | in IPv6). Takes a boolean or the special values | |
627 | <literal>prefer-public</literal> and | |
b938cb90 | 628 | <literal>kernel</literal>. When true, enables the privacy |
1f0d9695 | 629 | extensions and prefers temporary addresses over public |
b938cb90 | 630 | addresses. When <literal>prefer-public</literal>, enables the |
1f0d9695 LP |
631 | privacy extensions, but prefers public addresses over |
632 | temporary addresses. When false, the privacy extensions | |
b938cb90 | 633 | remain disabled. When <literal>kernel</literal>, the kernel's |
1f0d9695 | 634 | default setting will be left in place. Defaults to |
a46e37cb SS |
635 | <literal>no</literal>.</para></listitem> |
636 | </varlistentry> | |
941d0aa8 | 637 | <varlistentry> |
f921f573 | 638 | <term><varname>IPv6AcceptRA=</varname></term> |
c7fe06fb ZJS |
639 | <listitem><para>Takes a boolean. Controls IPv6 Router Advertisement (RA) reception support for the |
640 | interface. If true, RAs are accepted; if false, RAs are ignored. When RAs are accepted, they may | |
641 | trigger the start of the DHCPv6 client if the relevant flags are set in the RA data, or if no | |
642 | routers are found on the link. The default is to disable RA reception for bridge devices or when IP | |
643 | forwarding is enabled, and to enable it otherwise. Cannot be enabled on bond devices and when link | |
86b52a39 | 644 | local addressing is disabled.</para> |
1e7a0e21 LP |
645 | |
646 | <para>Further settings for the IPv6 RA support may be configured in the | |
f921f573 | 647 | <literal>[IPv6AcceptRA]</literal> section, see below.</para> |
1e7a0e21 LP |
648 | |
649 | <para>Also see <ulink | |
650 | url="https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt">ip-sysctl.txt</ulink> in the kernel | |
651 | documentation regarding <literal>accept_ra</literal>, but note that systemd's setting of | |
652 | <constant>1</constant> (i.e. true) corresponds to kernel's setting of <constant>2</constant>.</para> | |
c4a05aa1 | 653 | |
b3454e1e YW |
654 | <para>Note that kernel's implementation of the IPv6 RA protocol is always disabled, |
655 | regardless of this setting. If this option is enabled, a userspace implementation of the IPv6 | |
656 | RA protocol is used, and the kernel's own implementation remains disabled, since | |
657 | <command>systemd-networkd</command> needs to know all details supplied in the advertisements, | |
658 | and these are not available from the kernel if the kernel's own implementation is used.</para> | |
ebf98081 | 659 | </listitem> |
941d0aa8 | 660 | </varlistentry> |
44de7fb1 SS |
661 | <varlistentry> |
662 | <term><varname>IPv6DuplicateAddressDetection=</varname></term> | |
a8eaaee7 | 663 | <listitem><para>Configures the amount of IPv6 Duplicate |
025314d9 | 664 | Address Detection (DAD) probes to send. When unset, the kernel's default will be used. |
44de7fb1 SS |
665 | </para></listitem> |
666 | </varlistentry> | |
a86cba89 SS |
667 | <varlistentry> |
668 | <term><varname>IPv6HopLimit=</varname></term> | |
669 | <listitem><para>Configures IPv6 Hop Limit. For each router that | |
670 | forwards the packet, the hop limit is decremented by 1. When the | |
671 | hop limit field reaches zero, the packet is discarded. | |
025314d9 | 672 | When unset, the kernel's default will be used. |
a86cba89 SS |
673 | </para></listitem> |
674 | </varlistentry> | |
23d8b221 | 675 | <varlistentry> |
8f9a206b | 676 | <term><varname>IPv4ProxyARP=</varname></term> |
9b6ffef3 | 677 | <listitem><para>Takes a boolean. Configures proxy ARP for IPv4. Proxy ARP is the technique in which one host, |
23d8b221 SS |
678 | usually a router, answers ARP requests intended for another machine. By "faking" its identity, |
679 | the router accepts responsibility for routing packets to the "real" destination. (see <ulink | |
680 | url="https://tools.ietf.org/html/rfc1027">RFC 1027</ulink>. | |
025314d9 | 681 | When unset, the kernel's default will be used. |
23d8b221 SS |
682 | </para></listitem> |
683 | </varlistentry> | |
a0e5c15d | 684 | <varlistentry> |
465dfe59 | 685 | <term><varname>IPv6ProxyNDP=</varname></term> |
9b6ffef3 | 686 | <listitem><para>Takes a boolean. Configures proxy NDP for IPv6. Proxy NDP (Neighbor Discovery |
465dfe59 HV |
687 | Protocol) is a technique for IPv6 to allow routing of addresses to a different |
688 | destination when peers expect them to be present on a certain physical link. | |
a0e5c15d FK |
689 | In this case a router answers Neighbour Advertisement messages intended for |
690 | another machine by offering its own MAC address as destination. | |
465dfe59 | 691 | Unlike proxy ARP for IPv4, it is not enabled globally, but will only send Neighbour |
a0e5c15d | 692 | Advertisement messages for addresses in the IPv6 neighbor proxy table, |
465dfe59 HV |
693 | which can also be shown by <command>ip -6 neighbour show proxy</command>. |
694 | systemd-networkd will control the per-interface `proxy_ndp` switch for each configured | |
695 | interface depending on this option. | |
025314d9 | 696 | When unset, the kernel's default will be used. |
465dfe59 HV |
697 | </para></listitem> |
698 | </varlistentry> | |
699 | <varlistentry> | |
700 | <term><varname>IPv6ProxyNDPAddress=</varname></term> | |
701 | <listitem><para>An IPv6 address, for which Neighbour Advertisement messages will be | |
702 | proxied. This option may be specified more than once. systemd-networkd will add the | |
703 | <option>IPv6ProxyNDPAddress=</option> entries to the kernel's IPv6 neighbor proxy table. | |
964c4eda | 704 | This option implies <option>IPv6ProxyNDP=yes</option> but has no effect if |
025314d9 | 705 | <option>IPv6ProxyNDP</option> has been set to false. When unset, the kernel's default will be used. |
a0e5c15d FK |
706 | </para></listitem> |
707 | </varlistentry> | |
3f9e0236 PF |
708 | <varlistentry> |
709 | <term><varname>IPv6PrefixDelegation=</varname></term> | |
710 | <listitem><para>Whether to enable or disable Router Advertisement sending on a link. | |
982be97c PF |
711 | Allowed values are <literal>static</literal> which distributes prefixes as defined in |
712 | the <literal>[IPv6PrefixDelegation]</literal> and any <literal>[IPv6Prefix]</literal> | |
713 | sections, <literal>dhcpv6</literal> which requests prefixes using a DHCPv6 client | |
714 | configured for another link and any values configured in the | |
715 | <literal>[IPv6PrefixDelegation]</literal> section while ignoring all static prefix | |
716 | configuration sections, <literal>yes</literal> which uses both static configuration | |
717 | and DHCPv6, and <literal>false</literal> which turns off IPv6 prefix delegation | |
718 | altogether. Defaults to <literal>false</literal>. See the | |
719 | <literal>[IPv6PrefixDelegation]</literal> and the <literal>[IPv6Prefix]</literal> | |
720 | sections for more configuration options. | |
3f9e0236 PF |
721 | </para></listitem> |
722 | </varlistentry> | |
02e9e34b AR |
723 | <varlistentry> |
724 | <term><varname>IPv6PDSubnetId=</varname></term> | |
725 | <listitem><para>Configure a specific subnet ID on the interface from a (previously) received prefix delegation. | |
726 | You can either set "auto" (the default) or a specific subnet ID | |
727 | (as defined in <ulink url="https://tools.ietf.org/html/rfc4291#section-2.5.4">RFC 4291</ulink>, section 2.5.4), | |
728 | in which case the allowed value is hexadecimal, from 0 to 0x7fffffffffffffff inclusive. | |
729 | This option is only effective when used together with <varname>IPv6PrefixDelegation=</varname> | |
730 | and the corresponding configuration on the upstream interface. | |
731 | </para></listitem> | |
732 | </varlistentry> | |
11102cba SS |
733 | <varlistentry> |
734 | <term><varname>IPv6MTUBytes=</varname></term> | |
735 | <listitem><para>Configures IPv6 maximum transmission unit (MTU). | |
025314d9 | 736 | An integer greater than or equal to 1280 bytes. When unset, the kernel's default will be used. |
11102cba SS |
737 | </para></listitem> |
738 | </varlistentry> | |
798d3a52 ZJS |
739 | <varlistentry> |
740 | <term><varname>Bridge=</varname></term> | |
741 | <listitem> | |
9e35b3de ZJS |
742 | <para>The name of the bridge to add the link to. See |
743 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
744 | </para> | |
798d3a52 ZJS |
745 | </listitem> |
746 | </varlistentry> | |
747 | <varlistentry> | |
748 | <term><varname>Bond=</varname></term> | |
749 | <listitem> | |
9e35b3de ZJS |
750 | <para>The name of the bond to add the link to. See |
751 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
752 | </para> | |
798d3a52 ZJS |
753 | </listitem> |
754 | </varlistentry> | |
6cb955c6 AR |
755 | <varlistentry> |
756 | <term><varname>VRF=</varname></term> | |
757 | <listitem> | |
9e35b3de ZJS |
758 | <para>The name of the VRF to add the link to. See |
759 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
760 | </para> | |
6cb955c6 AR |
761 | </listitem> |
762 | </varlistentry> | |
798d3a52 ZJS |
763 | <varlistentry> |
764 | <term><varname>VLAN=</varname></term> | |
765 | <listitem> | |
9e35b3de ZJS |
766 | <para>The name of a VLAN to create on the link. See |
767 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
768 | This option may be specified more than once.</para> | |
798d3a52 ZJS |
769 | </listitem> |
770 | </varlistentry> | |
2479c4fe | 771 | <varlistentry> |
772 | <term><varname>IPVLAN=</varname></term> | |
773 | <listitem> | |
774 | <para>The name of a IPVLAN to create on the link. See | |
775 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
776 | This option may be specified more than once.</para> | |
777 | </listitem> | |
778 | </varlistentry> | |
798d3a52 ZJS |
779 | <varlistentry> |
780 | <term><varname>MACVLAN=</varname></term> | |
781 | <listitem> | |
9e35b3de ZJS |
782 | <para>The name of a MACVLAN to create on the link. See |
783 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
784 | This option may be specified more than once.</para> | |
798d3a52 ZJS |
785 | </listitem> |
786 | </varlistentry> | |
787 | <varlistentry> | |
788 | <term><varname>VXLAN=</varname></term> | |
789 | <listitem> | |
9e35b3de ZJS |
790 | <para>The name of a VXLAN to create on the link. See |
791 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
792 | This option may be specified more than once.</para> | |
798d3a52 ZJS |
793 | </listitem> |
794 | </varlistentry> | |
795 | <varlistentry> | |
796 | <term><varname>Tunnel=</varname></term> | |
797 | <listitem> | |
9e35b3de ZJS |
798 | <para>The name of a Tunnel to create on the link. See |
799 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
800 | This option may be specified more than once.</para> | |
798d3a52 ZJS |
801 | </listitem> |
802 | </varlistentry> | |
81962db7 SS |
803 | <varlistentry> |
804 | <term><varname>MACsec=</varname></term> | |
805 | <listitem> | |
806 | <para>The name of a MACsec device to create on the link. See | |
807 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
808 | This option may be specified more than once.</para> | |
809 | </listitem> | |
810 | </varlistentry> | |
dd5f3175 SS |
811 | <varlistentry> |
812 | <term><varname>ActiveSlave=</varname></term> | |
813 | <listitem> | |
9b6ffef3 | 814 | <para>Takes a boolean. Specifies the new active slave. The <literal>ActiveSlave=</literal> |
dd5f3175 SS |
815 | option is only valid for following modes: |
816 | <literal>active-backup</literal>, | |
817 | <literal>balance-alb</literal> and | |
818 | <literal>balance-tlb</literal>. Defaults to false. | |
819 | </para> | |
820 | </listitem> | |
821 | </varlistentry> | |
822 | <varlistentry> | |
823 | <term><varname>PrimarySlave=</varname></term> | |
824 | <listitem> | |
9b6ffef3 | 825 | <para>Takes a boolean. Specifies which slave is the primary device. The specified |
dd5f3175 SS |
826 | device will always be the active slave while it is available. Only when the |
827 | primary is off-line will alternate devices be used. This is useful when | |
828 | one slave is preferred over another, e.g. when one slave has higher throughput | |
829 | than another. The <literal>PrimarySlave=</literal> option is only valid for | |
830 | following modes: | |
831 | <literal>active-backup</literal>, | |
832 | <literal>balance-alb</literal> and | |
833 | <literal>balance-tlb</literal>. Defaults to false. | |
834 | </para> | |
835 | </listitem> | |
836 | </varlistentry> | |
dad2d78e SS |
837 | <varlistentry> |
838 | <term><varname>ConfigureWithoutCarrier=</varname></term> | |
839 | <listitem> | |
9b6ffef3 | 840 | <para>Takes a boolean. Allows networkd to configure a specific link even if it has no carrier. |
bd0d471c DS |
841 | Defaults to false. If <option>IgnoreCarrierLoss=</option> is not explicitly set, it will |
842 | default to this value. | |
dad2d78e SS |
843 | </para> |
844 | </listitem> | |
845 | </varlistentry> | |
93b4dab5 SS |
846 | <varlistentry> |
847 | <term><varname>IgnoreCarrierLoss=</varname></term> | |
848 | <listitem> | |
bd0d471c DS |
849 | <para>Takes a boolean. Allows networkd to retain both the static and dynamic configuration |
850 | of the interface even if its carrier is lost. When unset, the value specified with | |
851 | <option>ConfigureWithoutCarrier=</option> is used. | |
93b4dab5 SS |
852 | </para> |
853 | </listitem> | |
854 | </varlistentry> | |
98d20a17 | 855 | <varlistentry> |
856 | <term><varname>Xfrm=</varname></term> | |
857 | <listitem> | |
858 | <para>The name of the xfrm to create on the link. See | |
859 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
860 | This option may be specified more than once.</para> | |
861 | </listitem> | |
862 | </varlistentry> | |
c98d78d3 YW |
863 | <varlistentry> |
864 | <term><varname>KeepConfiguration=</varname></term> | |
865 | <listitem> | |
866 | <para>Takes a boolean or one of <literal>static</literal>, <literal>dhcp-on-stop</literal>, | |
867 | <literal>dhcp</literal>. When <literal>static</literal>, <command>systemd-networkd</command> | |
868 | will not drop static addresses and routes on starting up process. When set to | |
869 | <literal>dhcp-on-stop</literal>, <command>systemd-networkd</command> will not drop addresses | |
870 | and routes on stopping the daemon. When <literal>dhcp</literal>, | |
871 | the addresses and routes provided by a DHCP server will never be dropped even if the DHCP | |
872 | lease expires. This is contrary to the DHCP specification, but may be the best choice if, | |
873 | e.g., the root filesystem relies on this connection. The setting <literal>dhcp</literal> | |
874 | implies <literal>dhcp-on-stop</literal>, and <literal>yes</literal> implies | |
80060352 ZJS |
875 | <literal>dhcp</literal> and <literal>static</literal>. Defaults to <literal>no</literal>. |
876 | </para> | |
c98d78d3 YW |
877 | </listitem> |
878 | </varlistentry> | |
93b4dab5 | 879 | |
798d3a52 ZJS |
880 | </variablelist> |
881 | ||
882 | </refsect1> | |
883 | ||
884 | <refsect1> | |
885 | <title>[Address] Section Options</title> | |
886 | ||
887 | <para>An <literal>[Address]</literal> section accepts the | |
888 | following keys. Specify several <literal>[Address]</literal> | |
889 | sections to configure several addresses.</para> | |
890 | ||
891 | <variablelist class='network-directives'> | |
892 | <varlistentry> | |
893 | <term><varname>Address=</varname></term> | |
894 | <listitem> | |
4e68898e YW |
895 | <para>As in the <literal>[Network]</literal> section. This key is mandatory. Each |
896 | <literal>[Address]</literal> section can contain one <varname>Address=</varname> setting.</para> | |
798d3a52 ZJS |
897 | </listitem> |
898 | </varlistentry> | |
899 | <varlistentry> | |
900 | <term><varname>Peer=</varname></term> | |
901 | <listitem> | |
902 | <para>The peer address in a point-to-point connection. | |
4e68898e | 903 | Accepts the same format as the <varname>Address=</varname> |
798d3a52 ZJS |
904 | key.</para> |
905 | </listitem> | |
906 | </varlistentry> | |
907 | <varlistentry> | |
908 | <term><varname>Broadcast=</varname></term> | |
909 | <listitem> | |
910 | <para>The broadcast address, which must be in the format | |
911 | described in | |
3ba3a79d | 912 | <citerefentry project='man-pages'><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>. |
798d3a52 | 913 | This key only applies to IPv4 addresses. If it is not |
4e68898e | 914 | given, it is derived from the <varname>Address=</varname> |
798d3a52 ZJS |
915 | key.</para> |
916 | </listitem> | |
917 | </varlistentry> | |
918 | <varlistentry> | |
919 | <term><varname>Label=</varname></term> | |
920 | <listitem> | |
921 | <para>An address label.</para> | |
922 | </listitem> | |
923 | </varlistentry> | |
b5834a0b SS |
924 | <varlistentry> |
925 | <term><varname>PreferredLifetime=</varname></term> | |
926 | <listitem> | |
927 | <para>Allows the default "preferred lifetime" of the address to be overridden. | |
928 | Only three settings are accepted: <literal>forever</literal> or <literal>infinity</literal> | |
929 | which is the default and means that the address never expires, and <literal>0</literal> which means | |
930 | that the address is considered immediately "expired" and will not be used, | |
931 | unless explicitly requested. A setting of PreferredLifetime=0 is useful for | |
932 | addresses which are added to be used only by a specific application, | |
933 | which is then configured to use them explicitly.</para> | |
934 | </listitem> | |
935 | </varlistentry> | |
2959fb07 SS |
936 | <varlistentry> |
937 | <term><varname>Scope=</varname></term> | |
938 | <listitem> | |
939 | <para>The scope of the address, which can be <literal>global</literal>, | |
940 | <literal>link</literal> or <literal>host</literal> or an unsigned integer ranges 0 to 255. | |
941 | Defaults to <literal>global</literal>.</para> | |
942 | </listitem> | |
943 | </varlistentry> | |
e63be084 SS |
944 | <varlistentry> |
945 | <term><varname>HomeAddress=</varname></term> | |
946 | <listitem> | |
9b6ffef3 | 947 | <para>Takes a boolean. Designates this address the "home address" as defined in |
e63be084 SS |
948 | <ulink url="https://tools.ietf.org/html/rfc6275">RFC 6275</ulink>. |
949 | Supported only on IPv6. Defaults to false.</para> | |
950 | </listitem> | |
951 | </varlistentry> | |
952 | <varlistentry> | |
953 | <term><varname>DuplicateAddressDetection=</varname></term> | |
954 | <listitem> | |
051e77ca SS |
955 | <para>Takes one of <literal>ipv4</literal>, <literal>ipv6</literal>, |
956 | <literal>both</literal>, <literal>none</literal>. When <literal>ipv4</literal>, | |
957 | performs IPv4 Duplicate Address Detection. See | |
958 | <ulink url="https://tools.ietf.org/html/rfc5227">RFC 5224</ulink>. | |
959 | When <literal>ipv6</literal>, performs IPv6 Duplicate Address Detection. See | |
960 | <ulink url="https://tools.ietf.org/html/rfc4862">RFC 4862</ulink>. | |
961 | Defaults to <literal>ipv6</literal>.</para> | |
e63be084 SS |
962 | </listitem> |
963 | </varlistentry> | |
964 | <varlistentry> | |
965 | <term><varname>ManageTemporaryAddress=</varname></term> | |
966 | <listitem> | |
9b6ffef3 | 967 | <para>Takes a boolean. If true the kernel manage temporary addresses created |
e63be084 SS |
968 | from this one as template on behalf of Privacy Extensions |
969 | <ulink url="https://tools.ietf.org/html/rfc3041">RFC 3041</ulink>. For this to become | |
970 | active, the use_tempaddr sysctl setting has to be set to a value greater than zero. | |
11fcfc53 | 971 | The given address needs to have a prefix length of 64. This flag allows using privacy |
e63be084 SS |
972 | extensions in a manually configured network, just like if stateless auto-configuration |
973 | was active. Defaults to false. </para> | |
974 | </listitem> | |
975 | </varlistentry> | |
976 | <varlistentry> | |
de697db0 | 977 | <term><varname>AddPrefixRoute=</varname></term> |
e63be084 | 978 | <listitem> |
de697db0 YW |
979 | <para>Takes a boolean. When true, the prefix route for the address is automatically added. |
980 | Defaults to true.</para> | |
e63be084 SS |
981 | </listitem> |
982 | </varlistentry> | |
983 | <varlistentry> | |
984 | <term><varname>AutoJoin=</varname></term> | |
985 | <listitem> | |
9b6ffef3 | 986 | <para>Takes a boolean. Joining multicast group on ethernet level via |
e63be084 SS |
987 | <command>ip maddr</command> command would not work if we have an Ethernet switch that does |
988 | IGMP snooping since the switch would not replicate multicast packets on ports that did not | |
989 | have IGMP reports for the multicast addresses. Linux vxlan interfaces created via | |
990 | <command>ip link add vxlan</command> or networkd's netdev kind vxlan have the group option | |
991 | that enables then to do the required join. By extending ip address command with option | |
992 | <literal>autojoin</literal> we can get similar functionality for openvswitch (OVS) vxlan | |
993 | interfaces as well as other tunneling mechanisms that need to receive multicast traffic. | |
994 | Defaults to <literal>no</literal>.</para> | |
995 | </listitem> | |
996 | </varlistentry> | |
798d3a52 ZJS |
997 | </variablelist> |
998 | </refsect1> | |
999 | ||
e4a71bf3 WKI |
1000 | <refsect1> |
1001 | <title>[Neighbor] Section Options</title> | |
1002 | <para>A <literal>[Neighbor]</literal> section accepts the | |
1003 | following keys. The neighbor section adds a permanent, static | |
1004 | entry to the neighbor table (IPv6) or ARP table (IPv4) for | |
1005 | the given hardware address on the links matched for the network. | |
1006 | Specify several <literal>[Neighbor]</literal> sections to configure | |
1007 | several static neighbors.</para> | |
1008 | ||
1009 | <variablelist class='network-directives'> | |
1010 | <varlistentry> | |
1011 | <term><varname>Address=</varname></term> | |
1012 | <listitem> | |
1013 | <para>The IP address of the neighbor.</para> | |
1014 | </listitem> | |
1015 | </varlistentry> | |
1016 | <varlistentry> | |
b956364d | 1017 | <term><varname>LinkLayerAddress=</varname></term> |
e4a71bf3 | 1018 | <listitem> |
b956364d | 1019 | <para>The link layer address (MAC address or IP address) of the neighbor.</para> |
e4a71bf3 WKI |
1020 | </listitem> |
1021 | </varlistentry> | |
1022 | </variablelist> | |
1023 | </refsect1> | |
1024 | ||
95b74ef6 SS |
1025 | <refsect1> |
1026 | <title>[IPv6AddressLabel] Section Options</title> | |
1027 | ||
1028 | <para>An <literal>[IPv6AddressLabel]</literal> section accepts the | |
1029 | following keys. Specify several <literal>[IPv6AddressLabel]</literal> | |
785889e5 | 1030 | sections to configure several address labels. IPv6 address labels are |
95b74ef6 SS |
1031 | used for address selection. See <ulink url="https://tools.ietf.org/html/rfc3484">RFC 3484</ulink>. |
1032 | Precedence is managed by userspace, and only the label itself is stored in the kernel</para> | |
1033 | ||
1034 | <variablelist class='network-directives'> | |
1035 | <varlistentry> | |
1036 | <term><varname>Label=</varname></term> | |
1037 | <listitem> | |
1038 | <para> The label for the prefix (an unsigned integer) ranges 0 to 4294967294. | |
1039 | 0xffffffff is reserved. This key is mandatory.</para> | |
1040 | </listitem> | |
1041 | </varlistentry> | |
1042 | <varlistentry> | |
1043 | <term><varname>Prefix=</varname></term> | |
1044 | <listitem> | |
1045 | <para>IPv6 prefix is an address with a prefix length, separated by a slash <literal>/</literal> character. | |
1046 | This key is mandatory. </para> | |
1047 | </listitem> | |
1048 | </varlistentry> | |
1049 | </variablelist> | |
1050 | </refsect1> | |
1051 | ||
bce67bbe SS |
1052 | <refsect1> |
1053 | <title>[RoutingPolicyRule] Section Options</title> | |
1054 | ||
1055 | <para>An <literal>[RoutingPolicyRule]</literal> section accepts the | |
1056 | following keys. Specify several <literal>[RoutingPolicyRule]</literal> | |
1057 | sections to configure several rules.</para> | |
1058 | ||
1059 | <variablelist class='network-directives'> | |
1060 | <varlistentry> | |
1061 | <term><varname>TypeOfService=</varname></term> | |
1062 | <listitem> | |
1063 | <para>Specifies the type of service to match a number between 0 to 255.</para> | |
1064 | </listitem> | |
1065 | </varlistentry> | |
1066 | <varlistentry> | |
1067 | <term><varname>From=</varname></term> | |
1068 | <listitem> | |
1069 | <para>Specifies the source address prefix to match. Possibly followed by a slash and the prefix length.</para> | |
1070 | </listitem> | |
1071 | </varlistentry> | |
1072 | <varlistentry> | |
1073 | <term><varname>To=</varname></term> | |
1074 | <listitem> | |
1075 | <para>Specifies the destination address prefix to match. Possibly followed by a slash and the prefix length.</para> | |
1076 | </listitem> | |
1077 | </varlistentry> | |
1078 | <varlistentry> | |
1079 | <term><varname>FirewallMark=</varname></term> | |
1080 | <listitem> | |
1081 | <para>Specifies the iptables firewall mark value to match (a number between 1 and 4294967295).</para> | |
1082 | </listitem> | |
1083 | </varlistentry> | |
1084 | <varlistentry> | |
1085 | <term><varname>Table=</varname></term> | |
1086 | <listitem> | |
41b90a1e YW |
1087 | <para>Specifies the routing table identifier to lookup if the rule selector matches. Takes |
1088 | one of <literal>default</literal>, <literal>main</literal>, and <literal>local</literal>, | |
1089 | or a number between 1 and 4294967295. Defaults to <literal>main</literal>.</para> | |
bce67bbe SS |
1090 | </listitem> |
1091 | </varlistentry> | |
1092 | <varlistentry> | |
1093 | <term><varname>Priority=</varname></term> | |
1094 | <listitem> | |
1095 | <para>Specifies the priority of this rule. <varname>Priority=</varname> is an unsigned | |
1096 | integer. Higher number means lower priority, and rules get processed in order of increasing number.</para> | |
1097 | </listitem> | |
1098 | </varlistentry> | |
762e2659 SS |
1099 | <varlistentry> |
1100 | <term><varname>IncomingInterface=</varname></term> | |
1101 | <listitem> | |
1102 | <para>Specifies incoming device to match. If the interface is loopback, the rule only matches packets originating from this host.</para> | |
1103 | </listitem> | |
1104 | </varlistentry> | |
1105 | <varlistentry> | |
1106 | <term><varname>OutgoingInterface=</varname></term> | |
1107 | <listitem> | |
1108 | <para>Specifies the outgoing device to match. The outgoing interface is only available for packets originating from local sockets that are bound to a device.</para> | |
1109 | </listitem> | |
1110 | </varlistentry> | |
926062f0 SS |
1111 | <varlistentry> |
1112 | <term><varname>SourcePort=</varname></term> | |
1113 | <listitem> | |
1114 | <para>Specifies the source IP port or IP port range match in forwarding information base (FIB) rules. | |
1115 | A port range is specified by the lower and upper port separated by a dash. Defaults to unset.</para> | |
1116 | </listitem> | |
1117 | </varlistentry> | |
1118 | <varlistentry> | |
1119 | <term><varname>DestinationPort=</varname></term> | |
1120 | <listitem> | |
1121 | <para>Specifies the destination IP port or IP port range match in forwarding information base (FIB) rules. | |
1122 | A port range is specified by the lower and upper port separated by a dash. Defaults to unset.</para> | |
1123 | </listitem> | |
1124 | </varlistentry> | |
1125 | <varlistentry> | |
97f9df9e | 1126 | <term><varname>IPProtocol=</varname></term> |
926062f0 | 1127 | <listitem> |
3a269dcf YW |
1128 | <para>Specifies the IP protocol to match in forwarding information base (FIB) rules. Takes IP protocol name such as <literal>tcp</literal>, |
1129 | <literal>udp</literal> or <literal>sctp</literal>, or IP protocol number such as <literal>6</literal> for <literal>tcp</literal> or | |
1130 | <literal>17</literal> for <literal>udp</literal>. | |
926062f0 SS |
1131 | Defaults to unset.</para> |
1132 | </listitem> | |
1133 | </varlistentry> | |
8b220643 SS |
1134 | <varlistentry> |
1135 | <term><varname>InvertRule=</varname></term> | |
1136 | <listitem> | |
53e1ba28 | 1137 | <para>A boolean. Specifies whether the rule is to be inverted. Defaults to false.</para> |
8b220643 SS |
1138 | </listitem> |
1139 | </varlistentry> | |
f6c6ff97 YW |
1140 | <varlistentry> |
1141 | <term><varname>Family=</varname></term> | |
1142 | <listitem> | |
1143 | <para>Takes a special value <literal>ipv4</literal>, <literal>ipv6</literal>, or | |
1144 | <literal>both</literal>. By default, the address family is determined by the address | |
1145 | specified in <varname>To=</varname> or <varname>From=</varname>. If neither | |
1146 | <varname>To=</varname> nor <varname>From=</varname> are specified, then defaults to | |
1147 | <literal>ipv4</literal>.</para> | |
1148 | </listitem> | |
1149 | </varlistentry> | |
ea471a46 YW |
1150 | <varlistentry> |
1151 | <term><varname>User=</varname></term> | |
1152 | <listitem> | |
1153 | <para>Takes a username, a user ID, or a range of user IDs separated by a dash. Defaults to | |
1154 | unset.</para> | |
1155 | </listitem> | |
1156 | </varlistentry> | |
53e1ba28 NF |
1157 | <varlistentry> |
1158 | <term><varname>SuppressPrefixLength=</varname></term> | |
1159 | <listitem> | |
1160 | <para>Takes a number <replaceable>N</replaceable> in the range 0-128 and rejects routing | |
1161 | decisions that have a prefix length of <replaceable>N</replaceable> or less. Defaults to | |
1162 | unset.</para> | |
1163 | </listitem> | |
1164 | </varlistentry> | |
bce67bbe | 1165 | </variablelist> |
c16c7808 SS |
1166 | </refsect1> |
1167 | ||
1168 | <refsect1> | |
1169 | <title>[NextHop] Section Options</title> | |
1170 | <para>The <literal>[NextHop]</literal> section accepts the | |
1171 | following keys. Specify several <literal>[NextHop]</literal> | |
1172 | sections to configure several nexthop. Nexthop is used to manipulate entries in the kernel's nexthop | |
1173 | tables.</para> | |
1174 | ||
1175 | <variablelist class='network-directives'> | |
1176 | <varlistentry> | |
1177 | <term><varname>Gateway=</varname></term> | |
1178 | <listitem> | |
1179 | <para>As in the <literal>[Network]</literal> section. This is mandatory.</para> | |
1180 | </listitem> | |
1181 | </varlistentry> | |
1182 | <varlistentry> | |
1183 | <term><varname>Id=</varname></term> | |
1184 | <listitem> | |
1185 | <para>The id of the nexthop (an unsigned integer). If unspecified or '0' then automatically chosen by kernel.</para> | |
1186 | </listitem> | |
1187 | </varlistentry> | |
1188 | </variablelist> | |
bce67bbe SS |
1189 | </refsect1> |
1190 | ||
798d3a52 ZJS |
1191 | <refsect1> |
1192 | <title>[Route] Section Options</title> | |
1193 | <para>The <literal>[Route]</literal> section accepts the | |
1194 | following keys. Specify several <literal>[Route]</literal> | |
1195 | sections to configure several routes.</para> | |
1196 | ||
1197 | <variablelist class='network-directives'> | |
1198 | <varlistentry> | |
1199 | <term><varname>Gateway=</varname></term> | |
1200 | <listitem> | |
427928ca ZJS |
1201 | <para>Takes the gateway address or special value <literal>_dhcp</literal>. If |
1202 | <literal>_dhcp</literal>, then the gateway address provided by DHCP (or in the IPv6 case, | |
1985c54f | 1203 | provided by IPv6 RA) is used.</para> |
798d3a52 ZJS |
1204 | </listitem> |
1205 | </varlistentry> | |
28959f7d | 1206 | <varlistentry> |
9cb8c559 | 1207 | <term><varname>GatewayOnLink=</varname></term> |
28959f7d | 1208 | <listitem> |
9b6ffef3 | 1209 | <para>Takes a boolean. If set to true, the kernel does not have |
28959f7d SS |
1210 | to check if the gateway is reachable directly by the current machine (i.e., the kernel does |
1211 | not need to check if the gateway is attached to the local network), so that we can insert the | |
9b6ffef3 | 1212 | route in the kernel table without it being complained about. Defaults to <literal>no</literal>. |
28959f7d SS |
1213 | </para> |
1214 | </listitem> | |
1215 | </varlistentry> | |
798d3a52 ZJS |
1216 | <varlistentry> |
1217 | <term><varname>Destination=</varname></term> | |
1218 | <listitem> | |
1219 | <para>The destination prefix of the route. Possibly | |
b938cb90 | 1220 | followed by a slash and the prefix length. If omitted, a |
798d3a52 ZJS |
1221 | full-length host route is assumed.</para> |
1222 | </listitem> | |
1223 | </varlistentry> | |
1224 | <varlistentry> | |
1225 | <term><varname>Source=</varname></term> | |
1226 | <listitem> | |
1227 | <para>The source prefix of the route. Possibly followed by | |
b938cb90 | 1228 | a slash and the prefix length. If omitted, a full-length |
798d3a52 ZJS |
1229 | host route is assumed.</para> |
1230 | </listitem> | |
1231 | </varlistentry> | |
1232 | <varlistentry> | |
1233 | <term><varname>Metric=</varname></term> | |
1234 | <listitem> | |
b938cb90 | 1235 | <para>The metric of the route (an unsigned integer).</para> |
798d3a52 ZJS |
1236 | </listitem> |
1237 | </varlistentry> | |
b5bf6f64 SS |
1238 | <varlistentry> |
1239 | <term><varname>IPv6Preference=</varname></term> | |
1240 | <listitem> | |
1241 | <para>Specifies the route preference as defined in <ulink | |
1242 | url="https://tools.ietf.org/html/rfc4191">RFC4191</ulink> for Router Discovery messages. | |
1243 | Which can be one of <literal>low</literal> the route has a lowest priority, | |
1244 | <literal>medium</literal> the route has a default priority or | |
1245 | <literal>high</literal> the route has a highest priority.</para> | |
1246 | </listitem> | |
1247 | </varlistentry> | |
769b56a3 TG |
1248 | <varlistentry> |
1249 | <term><varname>Scope=</varname></term> | |
1250 | <listitem> | |
f5c38922 YW |
1251 | <para>The scope of the route, which can be <literal>global</literal>, <literal>site</literal>, |
1252 | <literal>link</literal>, <literal>host</literal>, or <literal>nowhere</literal>. For IPv4 route, | |
1253 | defaults to <literal>host</literal> if <varname>Type=</varname> is <literal>local</literal> | |
1254 | or <literal>nat</literal>, and <literal>link</literal> if <varname>Type=</varname> is | |
1255 | <literal>broadcast</literal>, <literal>multicast</literal>, or <literal>anycast</literal>. | |
1256 | In other cases, defaults to <literal>global</literal>.</para> | |
769b56a3 | 1257 | </listitem> |
0d07e595 JK |
1258 | </varlistentry> |
1259 | <varlistentry> | |
1260 | <term><varname>PreferredSource=</varname></term> | |
1261 | <listitem> | |
1262 | <para>The preferred source address of the route. The address | |
1263 | must be in the format described in | |
1264 | <citerefentry project='man-pages'><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para> | |
1265 | </listitem> | |
769b56a3 | 1266 | </varlistentry> |
c953b24c | 1267 | <varlistentry> |
f5c38922 | 1268 | <term><varname>Table=</varname></term> |
c953b24c | 1269 | <listitem> |
f5c38922 YW |
1270 | <para>The table identifier for the route. Takes <literal>default</literal>, |
1271 | <literal>main</literal>, <literal>local</literal> or a number between 1 and 4294967295. | |
1272 | The table can be retrieved using <command>ip route show table <replaceable>num</replaceable></command>. | |
1273 | If unset and <varname>Type=</varname> is <literal>local</literal>, <literal>broadcast</literal>, | |
1274 | <literal>anycast</literal>, or <literal>nat</literal>, then <literal>local</literal> is used. | |
1275 | In other cases, defaults to <literal>main</literal>. | |
c953b24c SS |
1276 | </para> |
1277 | </listitem> | |
1278 | </varlistentry> | |
c83ecc04 SS |
1279 | <varlistentry> |
1280 | <term><varname>Protocol=</varname></term> | |
1281 | <listitem> | |
88925d2f | 1282 | <para>The protocol identifier for the route. Takes a number between 0 and 255 or the special values |
ca420b62 YW |
1283 | <literal>kernel</literal>, <literal>boot</literal>, <literal>static</literal>, |
1284 | <literal>ra</literal> and <literal>dhcp</literal>. Defaults to <literal>static</literal>. | |
c83ecc04 SS |
1285 | </para> |
1286 | </listitem> | |
1287 | </varlistentry> | |
983226f3 SS |
1288 | <varlistentry> |
1289 | <term><varname>Type=</varname></term> | |
1290 | <listitem> | |
94d6e299 YW |
1291 | <para>Specifies the type for the route. Takes one of <literal>unicast</literal>, |
1292 | <literal>local</literal>, <literal>broadcast</literal>, <literal>anycast</literal>, | |
1293 | <literal>multicast</literal>, <literal>blackhole</literal>, <literal>unreachable</literal>, | |
1294 | <literal>prohibit</literal>, <literal>throw</literal>, <literal>nat</literal>, and | |
1295 | <literal>xresolve</literal>. If <literal>unicast</literal>, a regular route is defined, i.e. a | |
66d7235e LP |
1296 | route indicating the path to take to a destination network address. If <literal>blackhole</literal>, packets |
1297 | to the defined route are discarded silently. If <literal>unreachable</literal>, packets to the defined route | |
1298 | are discarded and the ICMP message "Host Unreachable" is generated. If <literal>prohibit</literal>, packets | |
1299 | to the defined route are discarded and the ICMP message "Communication Administratively Prohibited" is | |
1300 | generated. If <literal>throw</literal>, route lookup in the current routing table will fail and the route | |
1301 | selection process will return to Routing Policy Database (RPDB). Defaults to <literal>unicast</literal>. | |
983226f3 SS |
1302 | </para> |
1303 | </listitem> | |
1304 | </varlistentry> | |
323d9329 SS |
1305 | <varlistentry> |
1306 | <term><varname>InitialCongestionWindow=</varname></term> | |
1307 | <listitem> | |
6b21ad33 SS |
1308 | <para>The TCP initial congestion window is used during the start of a TCP connection. During the start of a TCP |
1309 | session, when a client requests a resource, the server's initial congestion window determines how many data bytes | |
1310 | will be sent during the initial burst of data. Takes a size in bytes between 1 and 4294967295 (2^32 - 1). The usual | |
025314d9 | 1311 | suffixes K, M, G are supported and are understood to the base of 1024. When unset, the kernel's default will be used. |
323d9329 SS |
1312 | </para> |
1313 | </listitem> | |
1314 | </varlistentry> | |
1315 | <varlistentry> | |
1316 | <term><varname>InitialAdvertisedReceiveWindow=</varname></term> | |
1317 | <listitem> | |
5238e957 | 1318 | <para>The TCP initial advertised receive window is the amount of receive data (in bytes) that can initially be buffered at one time |
6b21ad33 SS |
1319 | on a connection. The sending host can send only that amount of data before waiting for an acknowledgment and window update |
1320 | from the receiving host. Takes a size in bytes between 1 and 4294967295 (2^32 - 1). The usual suffixes K, M, G are supported | |
025314d9 | 1321 | and are understood to the base of 1024. When unset, the kernel's default will be used. |
323d9329 SS |
1322 | </para> |
1323 | </listitem> | |
1324 | </varlistentry> | |
09f5dfad SS |
1325 | <varlistentry> |
1326 | <term><varname>QuickAck=</varname></term> | |
1327 | <listitem> | |
9b6ffef3 | 1328 | <para>Takes a boolean. When true enables TCP quick ack mode for the route. When unset, the kernel's default will be used. |
09f5dfad SS |
1329 | </para> |
1330 | </listitem> | |
1331 | </varlistentry> | |
633c7258 SS |
1332 | <varlistentry> |
1333 | <term><varname>FastOpenNoCookie=</varname></term> | |
1334 | <listitem> | |
1335 | <para>Takes a boolean. When true enables TCP fastopen without a cookie on a per-route basis. | |
1336 | When unset, the kernel's default will be used. | |
1337 | </para> | |
1338 | </listitem> | |
09f5dfad | 1339 | </varlistentry> |
9b88f20a SS |
1340 | <varlistentry> |
1341 | <term><varname>TTLPropagate=</varname></term> | |
1342 | <listitem> | |
1343 | <para>Takes a boolean. When true enables TTL propagation at Label Switched Path (LSP) egress. | |
1344 | When unset, the kernel's default will be used. | |
1345 | </para> | |
1346 | </listitem> | |
1347 | </varlistentry> | |
cea79e66 SS |
1348 | <varlistentry> |
1349 | <term><varname>MTUBytes=</varname></term> | |
1350 | <listitem> | |
1351 | <para>The maximum transmission unit in bytes to set for the | |
1352 | route. The usual suffixes K, M, G, are supported and are | |
1353 | understood to the base of 1024.</para> | |
1354 | <para>Note that if IPv6 is enabled on the interface, and the MTU is chosen | |
1355 | below 1280 (the minimum MTU for IPv6) it will automatically be increased to this value.</para> | |
1356 | </listitem> | |
afe42aef SC |
1357 | </varlistentry> |
1358 | <varlistentry> | |
1359 | <term><varname>IPServiceType=</varname></term> | |
1360 | <listitem> | |
e681a2ee YW |
1361 | <para>Takes string; <literal>CS6</literal> or <literal>CS4</literal>. Used to set IP |
1362 | service type to CS6 (network control) or CS4 (Realtime). Defaults to CS6.</para> | |
afe42aef SC |
1363 | </listitem> |
1364 | </varlistentry> | |
6ff5cc6b YW |
1365 | <varlistentry> |
1366 | <term><varname>MultiPathRoute=<replaceable>address</replaceable>[@<replaceable>name</replaceable>] [<replaceable>weight</replaceable>]</varname></term> | |
1367 | <listitem> | |
1368 | <para>Configures multipath route. Multipath routing is the technique of using multiple | |
1369 | alternative paths through a network. Takes gateway address. Optionally, takes a network | |
1370 | interface name or index separated with <literal>@</literal>, and a weight in 1..256 for | |
1371 | this multipath route separated with whitespace. This setting can be specified multiple | |
1372 | times. If an empty string is assigned, then the all previous assignments are cleared.</para> | |
1373 | </listitem> | |
1374 | </varlistentry> | |
798d3a52 ZJS |
1375 | </variablelist> |
1376 | </refsect1> | |
1377 | ||
1378 | <refsect1> | |
4f7331a8 YW |
1379 | <title>[DHCPv4] Section Options</title> |
1380 | <para>The <literal>[DHCPv4]</literal> section configures the | |
caa8ca42 | 1381 | DHCPv4 client, if it is enabled with the |
ad943783 | 1382 | <varname>DHCP=</varname> setting described above:</para> |
798d3a52 ZJS |
1383 | |
1384 | <variablelist class='network-directives'> | |
1385 | <varlistentry> | |
1386 | <term><varname>UseDNS=</varname></term> | |
1387 | <listitem> | |
1388 | <para>When true (the default), the DNS servers received | |
1389 | from the DHCP server will be used and take precedence over | |
1390 | any statically configured ones.</para> | |
e88d8021 ZJS |
1391 | |
1392 | <para>This corresponds to the <option>nameserver</option> | |
ad943783 LP |
1393 | option in <citerefentry |
1394 | project='man-pages'><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
798d3a52 ZJS |
1395 | </listitem> |
1396 | </varlistentry> | |
a24e12f0 YW |
1397 | <varlistentry> |
1398 | <term><varname>RoutesToDNS=</varname></term> | |
1399 | <listitem> | |
1400 | <para>When true, the routes to the DNS servers received from the DHCP server will be | |
1401 | configured. When <varname>UseDNS=</varname> is disabled, this setting is ignored. | |
f7e7bb65 | 1402 | Defaults to false.</para> |
a24e12f0 YW |
1403 | </listitem> |
1404 | </varlistentry> | |
301f4073 MM |
1405 | <varlistentry> |
1406 | <term><varname>UseNTP=</varname></term> | |
1407 | <listitem> | |
1408 | <para>When true (the default), the NTP servers received | |
1409 | from the DHCP server will be used by systemd-timesyncd | |
1410 | and take precedence over any statically configured ones.</para> | |
1411 | </listitem> | |
1412 | </varlistentry> | |
299d578f SS |
1413 | <varlistentry> |
1414 | <term><varname>UseSIP=</varname></term> | |
1415 | <listitem> | |
1416 | <para>When true (the default), the SIP servers received | |
1417 | from the DHCP server will be saved at the state files and can be | |
1418 | read via <function>sd_network_link_get_sip_servers()</function> function.</para> | |
1419 | </listitem> | |
1420 | </varlistentry> | |
284e8fd0 | 1421 | |
798d3a52 ZJS |
1422 | <varlistentry> |
1423 | <term><varname>UseMTU=</varname></term> | |
1424 | <listitem> | |
1425 | <para>When true, the interface maximum transmission unit | |
1426 | from the DHCP server will be used on the current link. | |
7169cdc8 | 1427 | If <varname>MTUBytes=</varname> is set, then this setting is ignored. |
95ab9eff | 1428 | Defaults to false.</para> |
798d3a52 ZJS |
1429 | </listitem> |
1430 | </varlistentry> | |
7585baa0 | 1431 | <varlistentry> |
1432 | <term><varname>Anonymize=</varname></term> | |
1433 | <listitem> | |
9b6ffef3 | 1434 | <para>Takes a boolean. When true, the options sent to the DHCP server will |
7585baa0 | 1435 | follow the <ulink url="https://tools.ietf.org/html/rfc7844">RFC 7844</ulink> |
1436 | (Anonymity Profiles for DHCP Clients) to minimize disclosure of identifying information. | |
1437 | Defaults to false.</para> | |
1438 | ||
1439 | <para>This option should only be set to true when | |
1440 | <varname>MACAddressPolicy=</varname> is set to <literal>random</literal> | |
1441 | (see <citerefentry | |
1442 | project='man-pages'><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>).</para> | |
1443 | ||
1444 | <para>Note that this configuration will overwrite others. | |
1445 | In concrete, the following variables will be ignored: | |
1446 | <varname>SendHostname=</varname>, <varname>ClientIdentifier=</varname>, | |
da2076a1 TK |
1447 | <varname>UseRoutes=</varname>, <varname>UseMTU=</varname>, |
1448 | <varname>VendorClassIdentifier=</varname>, <varname>UseTimezone=</varname>.</para> | |
fba10579 LP |
1449 | |
1450 | <para>With this option enabled DHCP requests will mimic those generated by Microsoft Windows, in | |
1451 | order to reduce the ability to fingerprint and recognize installations. This means DHCP request | |
1452 | sizes will grow and lease data will be more comprehensive than normally, though most of the | |
1453 | requested data is not actually used.</para> | |
7585baa0 | 1454 | </listitem> |
1455 | </varlistentry> | |
798d3a52 ZJS |
1456 | <varlistentry> |
1457 | <term><varname>SendHostname=</varname></term> | |
1458 | <listitem> | |
31ee3973 YW |
1459 | <para>When true (the default), the machine's hostname will be sent to the DHCP server. |
1460 | Note that the machine's hostname must consist only of 7-bit ASCII lower-case characters and | |
1461 | no spaces or dots, and be formatted as a valid DNS domain name. Otherwise, the hostname is not | |
cad8d671 | 1462 | sent even if this is set to true.</para> |
798d3a52 ZJS |
1463 | </listitem> |
1464 | </varlistentry> | |
7b8d23a9 SS |
1465 | |
1466 | <varlistentry> | |
1467 | <term><varname>MUDURL=</varname></term> | |
1468 | <listitem> | |
1469 | <para>When configured, the Manufacturer Usage Descriptions (MUD) URL will be sent to the | |
1470 | DHCPv4 server. Takes an URL of length up to 255 characters. A superficial verification that | |
1471 | the string is a valid URL will be performed. DHCPv4 clients are intended to have at most one | |
1472 | MUD URL associated with them. See | |
1473 | <ulink url="https://tools.ietf.org/html/rfc8520">RFC 8520</ulink>.</para> | |
1474 | </listitem> | |
1475 | </varlistentry> | |
1476 | ||
798d3a52 ZJS |
1477 | <varlistentry> |
1478 | <term><varname>UseHostname=</varname></term> | |
1479 | <listitem> | |
1480 | <para>When true (the default), the hostname received from | |
31ee3973 | 1481 | the DHCP server will be set as the transient hostname of the system. |
d59be2cf | 1482 | </para> |
798d3a52 ZJS |
1483 | </listitem> |
1484 | </varlistentry> | |
1adc5d0b | 1485 | <varlistentry> |
31ee3973 YW |
1486 | <term><varname>Hostname=</varname></term> |
1487 | <listitem> | |
1488 | <para>Use this value for the hostname which is sent to the DHCP server, instead of machine's hostname. | |
1489 | Note that the specified hostname must consist only of 7-bit ASCII lower-case characters and | |
1490 | no spaces or dots, and be formatted as a valid DNS domain name.</para> | |
1491 | </listitem> | |
1492 | </varlistentry> | |
798d3a52 ZJS |
1493 | <varlistentry> |
1494 | <term><varname>UseDomains=</varname></term> | |
1495 | <listitem> | |
9b6ffef3 | 1496 | <para>Takes a boolean, or the special value <literal>route</literal>. When true, the domain name |
b2a81c0b LP |
1497 | received from the DHCP server will be used as DNS search domain over this link, similar to the effect of |
1498 | the <option>Domains=</option> setting. If set to <literal>route</literal>, the domain name received from | |
1499 | the DHCP server will be used for routing DNS queries only, but not for searching, similar to the effect of | |
1500 | the <option>Domains=</option> setting when the argument is prefixed with <literal>~</literal>. Defaults to | |
1501 | false.</para> | |
1502 | ||
1503 | <para>It is recommended to enable this option only on trusted networks, as setting this affects resolution | |
38b38500 | 1504 | of all hostnames, in particular of single-label names. It is generally safer to use the supplied domain |
b2a81c0b LP |
1505 | only as routing domain, rather than as search domain, in order to not have it affect local resolution of |
1506 | single-label names.</para> | |
1507 | ||
1508 | <para>When set to true, this setting corresponds to the <option>domain</option> option in <citerefentry | |
1509 | project='man-pages'><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
798d3a52 ZJS |
1510 | </listitem> |
1511 | </varlistentry> | |
1512 | <varlistentry> | |
1513 | <term><varname>UseRoutes=</varname></term> | |
1514 | <listitem> | |
d6eac9bd DW |
1515 | <para>When true (the default), the static routes will be requested from the DHCP server and added to the |
1516 | routing table with a metric of 1024, and a scope of "global", "link" or "host", depending on the route's | |
1517 | destination and gateway. If the destination is on the local host, e.g., 127.x.x.x, or the same as the | |
1518 | link's own address, the scope will be set to "host". Otherwise if the gateway is null (a direct route), a | |
1519 | "link" scope will be used. For anything else, scope defaults to "global".</para> | |
798d3a52 ZJS |
1520 | </listitem> |
1521 | </varlistentry> | |
b4531227 YW |
1522 | <varlistentry> |
1523 | <term><varname>UseGateway=</varname></term> | |
1524 | <listitem> | |
589397a2 DS |
1525 | <para>When true, the gateway will be requested from the DHCP server and added to the routing table with a |
1526 | metric of 1024, and a scope of "link". When unset, the value specified with <option>UseRoutes=</option> | |
1527 | is used.</para> | |
b4531227 YW |
1528 | </listitem> |
1529 | </varlistentry> | |
ad943783 LP |
1530 | <varlistentry> |
1531 | <term><varname>UseTimezone=</varname></term> | |
1532 | ||
1533 | <listitem><para>When true, the timezone received from the | |
7f3fdb7f | 1534 | DHCP server will be set as timezone of the local |
ad943783 LP |
1535 | system. Defaults to <literal>no</literal>.</para></listitem> |
1536 | </varlistentry> | |
1537 | ||
3e43b2cd JJ |
1538 | <varlistentry> |
1539 | <term><varname>ClientIdentifier=</varname></term> | |
1540 | <listitem> | |
dace710c YW |
1541 | <para>The DHCPv4 client identifier to use. Takes one of <literal>mac</literal>, <literal>duid</literal> or <literal>duid-only</literal>. |
1542 | If set to <literal>mac</literal>, the MAC address of the link is used. | |
1543 | If set to <literal>duid</literal>, an RFC4361-compliant Client ID, which is the combination of IAID and DUID (see below), is used. | |
1544 | If set to <literal>duid-only</literal>, only DUID is used, this may not be RFC compliant, but some setups may require to use this. | |
1545 | Defaults to <literal>duid</literal>.</para> | |
3e43b2cd JJ |
1546 | </listitem> |
1547 | </varlistentry> | |
e2e08e77 | 1548 | |
798d3a52 ZJS |
1549 | <varlistentry> |
1550 | <term><varname>VendorClassIdentifier=</varname></term> | |
1551 | <listitem> | |
1552 | <para>The vendor class identifier used to identify vendor | |
1553 | type and configuration.</para> | |
1554 | </listitem> | |
1555 | </varlistentry> | |
076ea6f6 | 1556 | |
af1c0de0 SS |
1557 | <varlistentry> |
1558 | <term><varname>UserClass=</varname></term> | |
1559 | <listitem> | |
1560 | <para>A DHCPv4 client can use UserClass option to identify the type or category of user or applications | |
1561 | it represents. The information contained in this option is a string that represents the user class of which | |
1562 | the client is a member. Each class sets an identifying string of information to be used by the DHCP | |
1563 | service to classify clients. Takes a whitespace-separated list of strings.</para> | |
1564 | </listitem> | |
1565 | </varlistentry> | |
1566 | ||
715cedfb SS |
1567 | <varlistentry> |
1568 | <term><varname>MaxAttempts=</varname></term> | |
1569 | <listitem> | |
1570 | <para>Specifies how many times the DHCPv4 client configuration should be attempted. Takes a | |
1571 | number or <literal>infinity</literal>. Defaults to <literal>infinity</literal>. | |
1572 | Note that the time between retries is increased exponentially, so the network will not be | |
1573 | overloaded even if this number is high.</para> | |
1574 | </listitem> | |
1575 | </varlistentry> | |
1576 | ||
e2e08e77 ZJS |
1577 | <varlistentry> |
1578 | <term><varname>DUIDType=</varname></term> | |
1579 | <listitem> | |
1580 | <para>Override the global <varname>DUIDType</varname> setting for this network. See | |
1581 | <citerefentry><refentrytitle>networkd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
1582 | for a description of possible values.</para> | |
1583 | </listitem> | |
1584 | </varlistentry> | |
076ea6f6 | 1585 | |
e2e08e77 ZJS |
1586 | <varlistentry> |
1587 | <term><varname>DUIDRawData=</varname></term> | |
1588 | <listitem> | |
1589 | <para>Override the global <varname>DUIDRawData</varname> setting for this network. See | |
1590 | <citerefentry><refentrytitle>networkd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
1591 | for a description of possible values.</para> | |
076ea6f6 LP |
1592 | </listitem> |
1593 | </varlistentry> | |
e2e08e77 | 1594 | |
d05def16 LP |
1595 | <varlistentry> |
1596 | <term><varname>IAID=</varname></term> | |
1597 | <listitem> | |
1598 | <para>The DHCP Identity Association Identifier (IAID) for the interface, a 32-bit unsigned integer.</para> | |
1599 | </listitem> | |
1600 | </varlistentry> | |
1601 | ||
798d3a52 ZJS |
1602 | <varlistentry> |
1603 | <term><varname>RequestBroadcast=</varname></term> | |
1604 | <listitem> | |
1605 | <para>Request the server to use broadcast messages before | |
1606 | the IP address has been configured. This is necessary for | |
1607 | devices that cannot receive RAW packets, or that cannot | |
1608 | receive packets at all before an IP address has been | |
1609 | configured. On the other hand, this must not be enabled on | |
1610 | networks where broadcasts are filtered out.</para> | |
1611 | </listitem> | |
1612 | </varlistentry> | |
e2e08e77 | 1613 | |
798d3a52 ZJS |
1614 | <varlistentry> |
1615 | <term><varname>RouteMetric=</varname></term> | |
1616 | <listitem> | |
1bf1bfd9 | 1617 | <para>Set the routing metric for routes specified by the DHCP server. Defaults to 1024.</para> |
798d3a52 ZJS |
1618 | </listitem> |
1619 | </varlistentry> | |
f594276b JK |
1620 | |
1621 | <varlistentry> | |
1622 | <term><varname>RouteTable=<replaceable>num</replaceable></varname></term> | |
1623 | <listitem> | |
d11e656a | 1624 | <para>The table identifier for DHCP routes (a number between 1 and 4294967295, or 0 to unset). |
f594276b JK |
1625 | The table can be retrieved using <command>ip route show table <replaceable>num</replaceable></command>. |
1626 | </para> | |
917b2260 AR |
1627 | <para>When used in combination with <varname>VRF=</varname> the |
1628 | VRF's routing table is used unless this parameter is specified. | |
1629 | </para> | |
f594276b JK |
1630 | </listitem> |
1631 | </varlistentry> | |
9faed222 | 1632 | |
c695dcf9 SS |
1633 | <varlistentry> |
1634 | <term><varname>RouteMTUBytes=</varname></term> | |
1635 | <listitem> | |
1636 | <para>Specifies the MTU for the DHCP routes. Please see the [Route] section for further details.</para> | |
1637 | </listitem> | |
1638 | </varlistentry> | |
1639 | ||
9faed222 SS |
1640 | <varlistentry> |
1641 | <term><varname>ListenPort=</varname></term> | |
1642 | <listitem> | |
1643 | <para>Allow setting custom port for the DHCP client to listen on.</para> | |
1644 | </listitem> | |
1645 | </varlistentry> | |
fb5c8216 | 1646 | |
d6463307 SS |
1647 | <varlistentry> |
1648 | <term><varname>FallbackLeaseLifetimeSec=</varname></term> | |
1649 | <listitem> | |
1650 | <para>Allows to set DHCPv4 lease lifetime when DHCPv4 server does not send the lease lifetime. | |
1651 | Takes one of <literal>forever</literal> or <literal>infinity</literal> means that the address | |
1652 | never expires. Defaults to unset.</para> | |
1653 | </listitem> | |
1654 | </varlistentry> | |
1655 | ||
1501b429 SS |
1656 | <varlistentry> |
1657 | <term><varname>SendRelease=</varname></term> | |
1658 | <listitem> | |
1659 | <para>When true, the DHCPv4 client sends a DHCP release packet when it stops. | |
5f3b5f19 | 1660 | Defaults to true.</para> |
1501b429 SS |
1661 | </listitem> |
1662 | </varlistentry> | |
1663 | ||
0f3ff4ea SS |
1664 | <varlistentry> |
1665 | <term><varname>SendDecline=</varname></term> | |
1666 | <listitem> | |
86b52a39 | 1667 | <para>A boolean. When <literal>true</literal>, DHCPv4 clients receives IP address from DHCP server. |
0f3ff4ea SS |
1668 | After new IP is received, DHCPv4 performs IPv4 Duplicate Address Detection. If duplicate use of IP is detected |
1669 | the DHCPv4 client rejects the IP by sending a DHCPDECLINE packet DHCP clients try to obtain an IP address again. | |
1670 | See <ulink url="https://tools.ietf.org/html/rfc5227">RFC 5224</ulink>. | |
1671 | Defaults to <literal>unset</literal>.</para> | |
1672 | </listitem> | |
1673 | </varlistentry> | |
1674 | ||
caa8ca42 | 1675 | <varlistentry> |
5bc945be SS |
1676 | <term><varname>BlackList=</varname></term> |
1677 | <listitem> | |
1678 | <para>A whitespace-separated list of IPv4 addresses. DHCP offers from servers in the list are rejected.</para> | |
1679 | </listitem> | |
1680 | </varlistentry> | |
1681 | ||
1682 | <varlistentry> | |
1683 | <term><varname>RequestOptions=</varname></term> | |
caa8ca42 | 1684 | <listitem> |
35f6a5cb SS |
1685 | <para>When configured, allows to set arbitrary request options in the DHCPv4 request options list and will be |
1686 | sent to the DHCPV4 server. A whitespace-separated list of integers in the range 1..254. Defaults to unset.</para> | |
caa8ca42 SS |
1687 | </listitem> |
1688 | </varlistentry> | |
1689 | ||
cb29c156 | 1690 | <varlistentry> |
864edb39 | 1691 | <term><varname>SendOption=</varname></term> |
cb29c156 | 1692 | <listitem> |
7354900d DW |
1693 | <para>Send an arbitrary raw option in the DHCPv4 request. Takes a DHCP option number, data type |
1694 | and data separated with a colon | |
1695 | (<literal><replaceable>option</replaceable>:<replaceable>type</replaceable>:<replaceable>value</replaceable></literal>). | |
1696 | The option number must be an integer in the range 1..254. The type takes one of <literal>uint8</literal>, | |
1697 | <literal>uint16</literal>, <literal>uint32</literal>, <literal>ipv4address</literal>, or | |
1698 | <literal>string</literal>. Special characters in the data string may be escaped using | |
1699 | <ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style | |
1700 | escapes</ulink>. This setting can be specified multiple times. If an empty string is specified, | |
1701 | then all options specified earlier are cleared. Defaults to unset.</para> | |
1702 | </listitem> | |
1703 | </varlistentry> | |
1704 | ||
1705 | <varlistentry> | |
1706 | <term><varname>SendVendorOption=</varname></term> | |
1707 | <listitem> | |
1708 | <para>Send an arbitrary vendor option in the DHCPv4 request. Takes a DHCP option number, data type | |
d8b736bd YW |
1709 | and data separated with a colon |
1710 | (<literal><replaceable>option</replaceable>:<replaceable>type</replaceable>:<replaceable>value</replaceable></literal>). | |
11fcfc53 | 1711 | The option number must be an integer in the range 1..254. The type takes one of <literal>uint8</literal>, |
d8b736bd YW |
1712 | <literal>uint16</literal>, <literal>uint32</literal>, <literal>ipv4address</literal>, or |
1713 | <literal>string</literal>. Special characters in the data string may be escaped using | |
a2cc708a | 1714 | <ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style |
d8b736bd | 1715 | escapes</ulink>. This setting can be specified multiple times. If an empty string is specified, |
a2cc708a | 1716 | then all options specified earlier are cleared. Defaults to unset.</para> |
cb29c156 SS |
1717 | </listitem> |
1718 | </varlistentry> | |
caa8ca42 SS |
1719 | </variablelist> |
1720 | </refsect1> | |
1721 | ||
1722 | <refsect1> | |
1723 | <title>[DHCPv6] Section Options</title> | |
1724 | <para>The <literal>[DHCPv6]</literal> section configures the DHCPv6 client, if it is enabled with the | |
4f7331a8 | 1725 | <varname>DHCP=</varname> setting described above, or invoked by the IPv6 Router Advertisement:</para> |
caa8ca42 SS |
1726 | |
1727 | <variablelist class='network-directives'> | |
1728 | <varlistentry> | |
1729 | <term><varname>UseDNS=</varname></term> | |
1730 | <term><varname>UseNTP=</varname></term> | |
1731 | <listitem> | |
9fdae8d5 | 1732 | <para>As in the <literal>[DHCPv4]</literal> section.</para> |
caa8ca42 SS |
1733 | </listitem> |
1734 | </varlistentry> | |
1735 | ||
1bf1bfd9 YW |
1736 | <varlistentry> |
1737 | <term><varname>RouteMetric=</varname></term> | |
1738 | <listitem> | |
1739 | <para>Set the routing metric for routes specified by the DHCP server. Defaults to 1024.</para> | |
1740 | </listitem> | |
1741 | </varlistentry> | |
1742 | ||
fb5c8216 SS |
1743 | <varlistentry> |
1744 | <term><varname>RapidCommit=</varname></term> | |
1745 | <listitem> | |
9b6ffef3 | 1746 | <para>Takes a boolean. The DHCPv6 client can obtain configuration parameters from a DHCPv6 server through |
fb5c8216 SS |
1747 | a rapid two-message exchange (solicit and reply). When the rapid commit option is enabled by both |
1748 | the DHCPv6 client and the DHCPv6 server, the two-message exchange is used, rather than the default | |
1749 | four-method exchange (solicit, advertise, request, and reply). The two-message exchange provides | |
1750 | faster client configuration and is beneficial in environments in which networks are under a heavy load. | |
1751 | See <ulink url="https://tools.ietf.org/html/rfc3315#section-17.2.1">RFC 3315</ulink> for details. | |
1752 | Defaults to true.</para> | |
1753 | </listitem> | |
1754 | </varlistentry> | |
1755 | ||
3175a8c2 SS |
1756 | <varlistentry> |
1757 | <term><varname>MUDURL=</varname></term> | |
1758 | <listitem> | |
1759 | <para>When configured, the Manufacturer Usage Descriptions (MUD) URL will be sent to the DHCPV6 server. | |
1760 | Takes an URL of length up to 255 characters. A superficial verification that the string is a valid URL | |
1761 | will be performed. DHCPv6 clients are intended to have at most one MUD URL associated with them. See | |
1762 | <ulink url="https://tools.ietf.org/html/rfc8520">RFC 8520</ulink>.</para> | |
1763 | </listitem> | |
1764 | </varlistentry> | |
1765 | ||
35f6a5cb SS |
1766 | <varlistentry> |
1767 | <term><varname>RequestOptions=</varname></term> | |
1768 | <listitem> | |
1769 | <para>When configured, allows to set arbitrary request options in the DHCPv6 request options list and will | |
1770 | sent to the DHCPV6 server. A whitespace-separated list of integers in the range 1..254. Defaults to unset.</para> | |
1771 | </listitem> | |
1772 | </varlistentry> | |
1773 | ||
b4ccc5de SS |
1774 | <varlistentry> |
1775 | <term><varname>SendVendorOption=</varname></term> | |
1776 | <listitem> | |
1777 | <para>Send an arbitrary vendor option in the DHCPv6 request. Takes an enterprise identifier, DHCP option number, | |
1778 | data type, and data separated with a colon | |
1779 | (<literal><replaceable>enterprise identifier</replaceable>:<replaceable>option</replaceable>:<replaceable>type</replaceable>: | |
1780 | <replaceable>value</replaceable></literal>). Enterprise identifier is an unsigned integer ranges 1..4294967294. | |
1781 | The option number must be an integer in the range 1..254. Data type takes one of <literal>uint8</literal>, | |
1782 | <literal>uint16</literal>, <literal>uint32</literal>, <literal>ipv4address</literal>, <literal>ipv6address</literal>, or | |
1783 | <literal>string</literal>. Special characters in the data string may be escaped using | |
1784 | <ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style | |
1785 | escapes</ulink>. This setting can be specified multiple times. If an empty string is specified, | |
1786 | then all options specified earlier are cleared. Defaults to unset.</para> | |
1787 | </listitem> | |
1788 | </varlistentry> | |
1789 | ||
125f20b4 PF |
1790 | <varlistentry> |
1791 | <term><varname>ForceDHCPv6PDOtherInformation=</varname></term> | |
1792 | <listitem> | |
9b6ffef3 | 1793 | <para>Takes a boolean that enforces DHCPv6 stateful mode when the 'Other information' bit is set in |
125f20b4 PF |
1794 | Router Advertisement messages. By default setting only the 'O' bit in Router Advertisements |
1795 | makes DHCPv6 request network information in a stateless manner using a two-message Information | |
1796 | Request and Information Reply message exchange. | |
1797 | <ulink url="https://tools.ietf.org/html/rfc7084">RFC 7084</ulink>, requirement WPD-4, updates | |
1798 | this behavior for a Customer Edge router so that stateful DHCPv6 Prefix Delegation is also | |
1799 | requested when only the 'O' bit is set in Router Advertisements. This option enables such a CE | |
1800 | behavior as it is impossible to automatically distinguish the intention of the 'O' bit otherwise. | |
1801 | By default this option is set to 'false', enable it if no prefixes are delegated when the device | |
1802 | should be acting as a CE router.</para> | |
1803 | </listitem> | |
1804 | </varlistentry> | |
1805 | ||
9efa8a3c SS |
1806 | <varlistentry> |
1807 | <term><varname>AssignAcquiredDelegatedPrefixAddress=</varname></term> | |
1808 | <listitem> | |
1809 | <para>Takes a boolean. Specifies whether to add an address from the delegated prefixes which are received | |
1810 | from the WAN interface by the <varname>IPv6PrefixDelegation=</varname>. When true (on LAN interfce), the EUI-64 | |
1811 | algorithm will be used to form an interface identifier from the delegated prefixes. Defaults to true.</para> | |
1812 | </listitem> | |
1813 | </varlistentry> | |
1814 | ||
2805536b SS |
1815 | <varlistentry> |
1816 | <term><varname>PrefixDelegationHint=</varname></term> | |
1817 | <listitem> | |
48daf510 | 1818 | <para>Takes an IPv6 address with prefix length as <varname>Address=</varname> in |
2805536b | 1819 | the "[Network]" section. Specifies the DHCPv6 client for the requesting router to include |
35f6a5cb | 1820 | a prefix-hint in the DHCPv6 solicitation. Prefix ranges 1..128. Defaults to unset.</para> |
2805536b SS |
1821 | </listitem> |
1822 | </varlistentry> | |
cd305af1 SS |
1823 | |
1824 | <varlistentry> | |
1825 | <term><varname>WithoutRA=</varname></term> | |
1826 | <listitem> | |
1827 | <para>When true, DHCPv6 client starts without router advertisements's managed or other address configuration flag. | |
1828 | Defaults to false.</para> | |
1829 | </listitem> | |
1830 | </varlistentry> | |
e7d5fe17 AD |
1831 | |
1832 | <varlistentry> | |
1833 | <term><varname>SendOption=</varname></term> | |
1834 | <listitem> | |
1835 | <para>As in the <literal>[DHCPv4]</literal> section, however because DHCPv6 uses 16-bit fields to store | |
1836 | option numbers, the option number is an integer in the range 1..65536.</para> | |
1837 | </listitem> | |
1838 | </varlistentry> | |
f37f2a6b SS |
1839 | |
1840 | <varlistentry> | |
1841 | <term><varname>UserClass=</varname></term> | |
1842 | <listitem> | |
1843 | <para>A DHCPv6 client can use User Class option to identify the type or category of user or applications | |
1844 | it represents. The information contained in this option is a string that represents the user class of which | |
1845 | the client is a member. Each class sets an identifying string of information to be used by the DHCP | |
1846 | service to classify clients. Special characters in the data string may be escaped using | |
1847 | <ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style | |
1848 | escapes</ulink>. This setting can be specified multiple times. If an empty string is specified, | |
1849 | then all options specified earlier are cleared. Takes a whitespace-separated list of strings. Note that | |
1850 | currently NUL bytes are not allowed.</para> | |
1851 | </listitem> | |
1852 | </varlistentry> | |
ed0d1b2e SS |
1853 | |
1854 | <varlistentry> | |
1855 | <term><varname>VendorClass=</varname></term> | |
1856 | <listitem> | |
1857 | <para>A DHCPv6 client can use VendorClass option to identify the vendor that | |
1858 | manufactured the hardware on which the client is running. The information | |
1859 | contained in the data area of this option is contained in one or more opaque | |
1860 | fields that identify details of the hardware configuration. Takes a | |
1861 | whitespace-separated list of strings.</para> | |
1862 | </listitem> | |
1863 | </varlistentry> | |
ad943783 | 1864 | </variablelist> |
caa8ca42 | 1865 | </refsect1> |
413708d1 | 1866 | |
1e7a0e21 | 1867 | <refsect1> |
f921f573 LP |
1868 | <title>[IPv6AcceptRA] Section Options</title> |
1869 | <para>The <literal>[IPv6AcceptRA]</literal> section configures the IPv6 Router Advertisement | |
1870 | (RA) client, if it is enabled with the <varname>IPv6AcceptRA=</varname> setting described | |
1e7a0e21 LP |
1871 | above:</para> |
1872 | ||
1873 | <variablelist class='network-directives'> | |
1874 | <varlistentry> | |
1875 | <term><varname>UseDNS=</varname></term> | |
1876 | <listitem> | |
1877 | <para>When true (the default), the DNS servers received in the Router Advertisement will be used and take | |
1878 | precedence over any statically configured ones.</para> | |
1879 | ||
1880 | <para>This corresponds to the <option>nameserver</option> option in <citerefentry | |
1881 | project='man-pages'><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
1882 | </listitem> | |
1883 | </varlistentry> | |
1884 | ||
1885 | <varlistentry> | |
1886 | <term><varname>UseDomains=</varname></term> | |
1887 | <listitem> | |
9b6ffef3 | 1888 | <para>Takes a boolean, or the special value <literal>route</literal>. When true, the domain name |
1e7a0e21 LP |
1889 | received via IPv6 Router Advertisement (RA) will be used as DNS search domain over this link, similar to |
1890 | the effect of the <option>Domains=</option> setting. If set to <literal>route</literal>, the domain name | |
1891 | received via IPv6 RA will be used for routing DNS queries only, but not for searching, similar to the | |
1892 | effect of the <option>Domains=</option> setting when the argument is prefixed with | |
1893 | <literal>~</literal>. Defaults to false.</para> | |
1894 | ||
1895 | <para>It is recommended to enable this option only on trusted networks, as setting this affects resolution | |
38b38500 | 1896 | of all hostnames, in particular of single-label names. It is generally safer to use the supplied domain |
1e7a0e21 LP |
1897 | only as routing domain, rather than as search domain, in order to not have it affect local resolution of |
1898 | single-label names.</para> | |
1899 | ||
1900 | <para>When set to true, this setting corresponds to the <option>domain</option> option in <citerefentry | |
1901 | project='man-pages'><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
1902 | </listitem> | |
1903 | </varlistentry> | |
2ba31d29 JK |
1904 | |
1905 | <varlistentry> | |
1906 | <term><varname>RouteTable=<replaceable>num</replaceable></varname></term> | |
1907 | <listitem> | |
d11e656a ZJS |
1908 | <para>The table identifier for the routes received in the Router Advertisement |
1909 | (a number between 1 and 4294967295, or 0 to unset). | |
2ba31d29 JK |
1910 | The table can be retrieved using <command>ip route show table <replaceable>num</replaceable></command>. |
1911 | </para> | |
1912 | </listitem> | |
1913 | </varlistentry> | |
062c2eea SS |
1914 | |
1915 | <varlistentry> | |
1916 | <term><varname>UseAutonomousPrefix=</varname></term> | |
1917 | <listitem> | |
1918 | <para>When true (the default), the autonomous prefix received in the Router Advertisement will be used and take | |
1919 | precedence over any statically configured ones.</para> | |
1920 | </listitem> | |
1921 | </varlistentry> | |
1922 | ||
1923 | <varlistentry> | |
1924 | <term><varname>UseOnLinkPrefix=</varname></term> | |
1925 | <listitem> | |
1926 | <para>When true (the default), the onlink prefix received in the Router Advertisement will be used and take | |
1927 | precedence over any statically configured ones.</para> | |
1928 | </listitem> | |
1929 | </varlistentry> | |
1930 | ||
e520ce64 SS |
1931 | <varlistentry> |
1932 | <term><varname>BlackList=</varname></term> | |
1933 | <listitem> | |
1934 | <para>A whitespace-separated list of IPv6 prefixes. IPv6 prefixes supplied via router advertisements in the list are ignored.</para> | |
1935 | </listitem> | |
1936 | </varlistentry> | |
1937 | ||
d739fdde YW |
1938 | <varlistentry> |
1939 | <term><varname>DHCPv6Client=</varname></term> | |
1940 | <listitem> | |
ac24e418 SS |
1941 | <para>Takes a boolean, or the special value <literal>always</literal>. When true (the default), the DHCPv6 client will be started when the |
1942 | RA has the managed or other information flag. If set to <literal>always</literal>, the DHCPv6 client will be started even if there is no | |
1943 | managed or other information flag in the RA.</para> | |
d739fdde YW |
1944 | </listitem> |
1945 | </varlistentry> | |
1e7a0e21 LP |
1946 | </variablelist> |
1947 | </refsect1> | |
1948 | ||
ad943783 LP |
1949 | <refsect1> |
1950 | <title>[DHCPServer] Section Options</title> | |
1951 | <para>The <literal>[DHCPServer]</literal> section contains | |
1952 | settings for the DHCP server, if enabled via the | |
1953 | <varname>DHCPServer=</varname> option described above:</para> | |
1954 | ||
1955 | <variablelist class='network-directives'> | |
1956 | ||
9b3a67c5 TG |
1957 | <varlistentry> |
1958 | <term><varname>PoolOffset=</varname></term> | |
1959 | <term><varname>PoolSize=</varname></term> | |
1960 | ||
1961 | <listitem><para>Configures the pool of addresses to hand out. The pool | |
1962 | is a contiguous sequence of IP addresses in the subnet configured for | |
1963 | the server address, which does not include the subnet nor the broadcast | |
1964 | address. <varname>PoolOffset=</varname> takes the offset of the pool | |
1965 | from the start of subnet, or zero to use the default value. | |
1966 | <varname>PoolSize=</varname> takes the number of IP addresses in the | |
b938cb90 | 1967 | pool or zero to use the default value. By default, the pool starts at |
9b3a67c5 TG |
1968 | the first address after the subnet address and takes up the rest of |
1969 | the subnet, excluding the broadcast address. If the pool includes | |
1970 | the server address (the default), this is reserved and not handed | |
1971 | out to clients.</para></listitem> | |
1972 | </varlistentry> | |
1973 | ||
ad943783 LP |
1974 | <varlistentry> |
1975 | <term><varname>DefaultLeaseTimeSec=</varname></term> | |
1976 | <term><varname>MaxLeaseTimeSec=</varname></term> | |
1977 | ||
1978 | <listitem><para>Control the default and maximum DHCP lease | |
1979 | time to pass to clients. These settings take time values in seconds or | |
1980 | another common time unit, depending on the suffix. The default | |
1981 | lease time is used for clients that did not ask for a specific | |
1982 | lease time. If a client asks for a lease time longer than the | |
b938cb90 | 1983 | maximum lease time, it is automatically shortened to the |
ad943783 LP |
1984 | specified time. The default lease time defaults to 1h, the |
1985 | maximum lease time to 12h. Shorter lease times are beneficial | |
1986 | if the configuration data in DHCP leases changes frequently | |
1987 | and clients shall learn the new settings with shorter | |
1988 | latencies. Longer lease times reduce the generated DHCP | |
1989 | network traffic.</para></listitem> | |
1990 | </varlistentry> | |
1991 | ||
1992 | <varlistentry> | |
1993 | <term><varname>EmitDNS=</varname></term> | |
1994 | <term><varname>DNS=</varname></term> | |
1995 | ||
9b6ffef3 YW |
1996 | <listitem><para>Takes a boolean. Configures whether the DHCP leases handed out |
1997 | to clients shall contain DNS server information. Defaults to <literal>yes</literal>. | |
1998 | The DNS servers to pass to clients may be configured with the | |
ad943783 LP |
1999 | <varname>DNS=</varname> option, which takes a list of IPv4 |
2000 | addresses. If the <varname>EmitDNS=</varname> option is | |
b938cb90 | 2001 | enabled but no servers configured, the servers are |
ad943783 LP |
2002 | automatically propagated from an "uplink" interface that has |
2003 | appropriate servers set. The "uplink" interface is determined | |
2004 | by the default route of the system with the highest | |
2005 | priority. Note that this information is acquired at the time | |
2006 | the lease is handed out, and does not take uplink interfaces | |
2007 | into account that acquire DNS or NTP server information at a | |
2008 | later point. DNS server propagation does not take | |
2009 | <filename>/etc/resolv.conf</filename> into account. Also, note | |
a8eaaee7 | 2010 | that the leases are not refreshed if the uplink network |
ad943783 | 2011 | configuration changes. To ensure clients regularly acquire the |
b938cb90 | 2012 | most current uplink DNS server information, it is thus |
ad943783 LP |
2013 | advisable to shorten the DHCP lease time via |
2014 | <varname>MaxLeaseTimeSec=</varname> described | |
2015 | above.</para></listitem> | |
2016 | </varlistentry> | |
2017 | ||
2018 | <varlistentry> | |
2019 | <term><varname>EmitNTP=</varname></term> | |
2020 | <term><varname>NTP=</varname></term> | |
2021 | ||
2022 | <listitem><para>Similar to the <varname>EmitDNS=</varname> and | |
b938cb90 | 2023 | <varname>DNS=</varname> settings described above, these |
ad943783 LP |
2024 | settings configure whether and what NTP server information |
2025 | shall be emitted as part of the DHCP lease. The same syntax, | |
2026 | propagation semantics and defaults apply as for | |
2027 | <varname>EmitDNS=</varname> and | |
2028 | <varname>DNS=</varname>.</para></listitem> | |
2029 | </varlistentry> | |
2030 | ||
299d578f SS |
2031 | <varlistentry> |
2032 | <term><varname>EmitSIP=</varname></term> | |
2033 | <term><varname>SIP=</varname></term> | |
2034 | ||
2035 | <listitem><para>Similar to the <varname>EmitDNS=</varname> and | |
2036 | <varname>DNS=</varname> settings described above, these | |
2037 | settings configure whether and what SIP server information | |
2038 | shall be emitted as part of the DHCP lease. The same syntax, | |
2039 | propagation semantics and defaults apply as for | |
2040 | <varname>EmitDNS=</varname> and | |
2041 | <varname>DNS=</varname>.</para></listitem> | |
2042 | </varlistentry> | |
2043 | ||
284e8fd0 SS |
2044 | <varlistentry> |
2045 | <term><varname>POP3Servers=</varname></term> | |
2046 | ||
7d6342e4 ZJS |
2047 | <listitem><para>Similar to the <varname>DNS=</varname> setting described above, this setting |
2048 | configures whether and what POP3 server information shall be emitted as part of the DHCP lease. The | |
2049 | same syntax, propagation semantics and defaults apply as for | |
f6269fe7 SS |
2050 | <varname>DNS=</varname>.</para></listitem> |
2051 | </varlistentry> | |
2052 | ||
2053 | <varlistentry> | |
2054 | <term><varname>SMTPServers=</varname></term> | |
2055 | ||
2056 | <listitem><para>Similar to the <varname>DNS=</varname> setting described above, this | |
2057 | setting configures whether and what SMTP server information shall be emitted as part of | |
2058 | the DHCP lease. The same syntax, propagation semantics and defaults apply as for | |
284e8fd0 | 2059 | <varname>DNS=</varname>.</para></listitem> |
d361b373 SS |
2060 | </varlistentry> |
2061 | ||
2062 | <varlistentry> | |
2063 | <term><varname>LPRServers=</varname></term> | |
2064 | ||
2065 | <listitem><para>Similar to the <varname>DNS=</varname> setting described above, this | |
2066 | setting configures whether and what LPR (line printer) server information shall be emitted | |
2067 | as part of the DHCP lease. The same syntax, propagation semantics and defaults apply as for | |
2068 | <varname>DNS=</varname>.</para></listitem> | |
284e8fd0 SS |
2069 | </varlistentry> |
2070 | ||
77ff6022 CG |
2071 | <varlistentry> |
2072 | <term><varname>EmitRouter=</varname></term> | |
2073 | ||
2074 | <listitem><para>Similar to the <varname>EmitDNS=</varname> | |
2075 | setting described above, this setting configures whether the | |
2076 | DHCP lease should contain the router option. The same syntax, | |
2077 | propagation semantics and defaults apply as for | |
2078 | <varname>EmitDNS=</varname>.</para></listitem> | |
2079 | </varlistentry> | |
2080 | ||
ad943783 LP |
2081 | <varlistentry> |
2082 | <term><varname>EmitTimezone=</varname></term> | |
2083 | <term><varname>Timezone=</varname></term> | |
2084 | ||
9b6ffef3 YW |
2085 | <listitem><para>Takes a boolean. Configures whether the DHCP leases handed out |
2086 | to clients shall contain timezone information. Defaults to <literal>yes</literal>. The | |
ad943783 LP |
2087 | <varname>Timezone=</varname> setting takes a timezone string |
2088 | (such as <literal>Europe/Berlin</literal> or | |
2089 | <literal>UTC</literal>) to pass to clients. If no explicit | |
b938cb90 | 2090 | timezone is set, the system timezone of the local host is |
ad943783 LP |
2091 | propagated, as determined by the |
2092 | <filename>/etc/localtime</filename> symlink.</para></listitem> | |
2093 | </varlistentry> | |
2094 | ||
564ca984 | 2095 | <varlistentry> |
d8b736bd YW |
2096 | <term><varname>SendOption=</varname></term> |
2097 | <listitem> | |
2098 | <para>Send a raw option with value via DHCPv4 server. Takes a DHCP option number, data type | |
2099 | and data (<literal><replaceable>option</replaceable>:<replaceable>type</replaceable>:<replaceable>value</replaceable></literal>). | |
2100 | The option number is an integer in the range 1..254. The type takes one of <literal>uint8</literal>, | |
e7d5fe17 | 2101 | <literal>uint16</literal>, <literal>uint32</literal>, <literal>ipv4address</literal>, <literal>ipv6address</literal>, or |
7354900d DW |
2102 | <literal>string</literal>. Special characters in the data string may be escaped using |
2103 | <ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style | |
2104 | escapes</ulink>. This setting can be specified multiple times. If an empty string is specified, | |
2105 | then all options specified earlier are cleared. Defaults to unset.</para> | |
2106 | </listitem> | |
2107 | </varlistentry> | |
2108 | ||
2109 | <varlistentry> | |
2110 | <term><varname>SendVendorOption=</varname></term> | |
2111 | <listitem> | |
2112 | <para>Send a vendor option with value via DHCPv4 server. Takes a DHCP option number, data type | |
2113 | and data (<literal><replaceable>option</replaceable>:<replaceable>type</replaceable>:<replaceable>value</replaceable></literal>). | |
2114 | The option number is an integer in the range 1..254. The type takes one of <literal>uint8</literal>, | |
d8b736bd YW |
2115 | <literal>uint16</literal>, <literal>uint32</literal>, <literal>ipv4address</literal>, or |
2116 | <literal>string</literal>. Special characters in the data string may be escaped using | |
2117 | <ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style | |
2118 | escapes</ulink>. This setting can be specified multiple times. If an empty string is specified, | |
2119 | then all options specified earlier are cleared. Defaults to unset.</para> | |
2120 | </listitem> | |
564ca984 SS |
2121 | </varlistentry> |
2122 | ||
ad943783 LP |
2123 | </variablelist> |
2124 | </refsect1> | |
2125 | ||
798d3a52 | 2126 | <refsect1> |
3f9e0236 PF |
2127 | <title>[IPv6PrefixDelegation] Section Options</title> |
2128 | <para>The <literal>[IPv6PrefixDelegation]</literal> section contains | |
2129 | settings for sending IPv6 Router Advertisements and whether to act as | |
2130 | a router, if enabled via the <varname>IPv6PrefixDelegation=</varname> | |
2131 | option described above. IPv6 network prefixes are defined with one or | |
2132 | more <literal>[IPv6Prefix]</literal> sections.</para> | |
2133 | ||
2134 | <variablelist class='network-directives'> | |
2135 | ||
2136 | <varlistentry> | |
2137 | <term><varname>Managed=</varname></term> | |
2138 | <term><varname>OtherInformation=</varname></term> | |
2139 | ||
9b6ffef3 YW |
2140 | <listitem><para>Takes a boolean. Controls whether a DHCPv6 server is used to acquire IPv6 |
2141 | addresses on the network link when <varname>Managed=</varname> | |
3f9e0236 PF |
2142 | is set to <literal>true</literal> or if only additional network |
2143 | information can be obtained via DHCPv6 for the network link when | |
9b6ffef3 | 2144 | <varname>OtherInformation=</varname> is set to |
3f9e0236 PF |
2145 | <literal>true</literal>. Both settings default to |
2146 | <literal>false</literal>, which means that a DHCPv6 server is not being | |
2147 | used.</para></listitem> | |
2148 | </varlistentry> | |
2149 | ||
2150 | <varlistentry> | |
2151 | <term><varname>RouterLifetimeSec=</varname></term> | |
2152 | ||
9b6ffef3 | 2153 | <listitem><para>Takes a timespan. Configures the IPv6 router lifetime in seconds. If set, |
3f9e0236 | 2154 | this host also announces itself in Router Advertisements as an IPv6 |
025314d9 | 2155 | router for the network link. When unset, the host is not acting as a router.</para> |
3f9e0236 PF |
2156 | </listitem> |
2157 | </varlistentry> | |
2158 | ||
2159 | <varlistentry> | |
2160 | <term><varname>RouterPreference=</varname></term> | |
2161 | ||
2162 | <listitem><para>Configures IPv6 router preference if | |
2163 | <varname>RouterLifetimeSec=</varname> is non-zero. Valid values are | |
2164 | <literal>high</literal>, <literal>medium</literal> and | |
2165 | <literal>low</literal>, with <literal>normal</literal> and | |
2166 | <literal>default</literal> added as synonyms for | |
2167 | <literal>medium</literal> just to make configuration easier. See | |
2168 | <ulink url="https://tools.ietf.org/html/rfc4191">RFC 4191</ulink> | |
2169 | for details. Defaults to <literal>medium</literal>.</para></listitem> | |
2170 | </varlistentry> | |
2171 | ||
2172 | <varlistentry> | |
4cb8478c | 2173 | <term><varname>EmitDNS=</varname></term> |
3f9e0236 PF |
2174 | <term><varname>DNS=</varname></term> |
2175 | ||
fd3ef936 YW |
2176 | <listitem><para><varname>DNS=</varname> specifies a list of recursive DNS server IPv6 addresses |
2177 | that are distributed via Router Advertisement messages when <varname>EmitDNS=</varname> is | |
2178 | true. <varname>DNS=</varname> also takes special value <literal>_link_local</literal>; in that | |
2179 | case the IPv6 link local address is distributed. If <varname>DNS=</varname> is empty, DNS | |
2180 | servers are read from the <literal>[Network]</literal> section. If the | |
2181 | <literal>[Network]</literal> section does not contain any DNS servers either, DNS servers from | |
2182 | the uplink with the highest priority default route are used. When <varname>EmitDNS=</varname> | |
2183 | is false, no DNS server information is sent in Router Advertisement messages. | |
4cb8478c | 2184 | <varname>EmitDNS=</varname> defaults to true. |
3f9e0236 PF |
2185 | </para></listitem> |
2186 | </varlistentry> | |
2187 | ||
760021c0 | 2188 | <varlistentry> |
4cb8478c | 2189 | <term><varname>EmitDomains=</varname></term> |
760021c0 PF |
2190 | <term><varname>Domains=</varname></term> |
2191 | ||
4cb8478c PF |
2192 | <listitem><para>A list of DNS search domains distributed via Router |
2193 | Advertisement messages when <varname>EmitDomains=</varname> is true. If | |
2194 | <varname>Domains=</varname> is empty, DNS search domains are read from the | |
2195 | <literal>[Network]</literal> section. If the <literal>[Network]</literal> | |
2196 | section does not contain any DNS search domains either, DNS search | |
2197 | domains from the uplink with the highest priority default route are | |
2198 | used. When <varname>EmitDomains=</varname> is false, no DNS search domain | |
2199 | information is sent in Router Advertisement messages. | |
2200 | <varname>EmitDomains=</varname> defaults to true. | |
2201 | </para></listitem> | |
760021c0 PF |
2202 | </varlistentry> |
2203 | ||
3f9e0236 PF |
2204 | <varlistentry> |
2205 | <term><varname>DNSLifetimeSec=</varname></term> | |
2206 | ||
2207 | <listitem><para>Lifetime in seconds for the DNS server addresses listed | |
760021c0 PF |
2208 | in <varname>DNS=</varname> and search domains listed in |
2209 | <varname>Domains=</varname>.</para></listitem> | |
3f9e0236 PF |
2210 | </varlistentry> |
2211 | ||
2212 | </variablelist> | |
2213 | </refsect1> | |
2214 | ||
203d4df5 | 2215 | <refsect1> |
3f9e0236 PF |
2216 | <title>[IPv6Prefix] Section Options</title> |
2217 | <para>One or more <literal>[IPv6Prefix]</literal> sections contain the IPv6 | |
2218 | prefixes that are announced via Router Advertisements. See | |
2219 | <ulink url="https://tools.ietf.org/html/rfc4861">RFC 4861</ulink> | |
2220 | for further details.</para> | |
2221 | ||
2222 | <variablelist class='network-directives'> | |
2223 | ||
2224 | <varlistentry> | |
2225 | <term><varname>AddressAutoconfiguration=</varname></term> | |
2226 | <term><varname>OnLink=</varname></term> | |
2227 | ||
9b6ffef3 | 2228 | <listitem><para>Takes a boolean to specify whether IPv6 addresses can be |
3f9e0236 PF |
2229 | autoconfigured with this prefix and whether the prefix can be used for |
2230 | onlink determination. Both settings default to <literal>true</literal> | |
2231 | in order to ease configuration. | |
2232 | </para></listitem> | |
2233 | </varlistentry> | |
2234 | ||
2235 | <varlistentry> | |
2236 | <term><varname>Prefix=</varname></term> | |
2237 | ||
2238 | <listitem><para>The IPv6 prefix that is to be distributed to hosts. | |
2239 | Similarly to configuring static IPv6 addresses, the setting is | |
2240 | configured as an IPv6 prefix and its prefix length, separated by a | |
2241 | <literal>/</literal> character. Use multiple | |
2242 | <literal>[IPv6Prefix]</literal> sections to configure multiple IPv6 | |
2243 | prefixes since prefix lifetimes, address autoconfiguration and onlink | |
2244 | status may differ from one prefix to another.</para></listitem> | |
2245 | </varlistentry> | |
2246 | ||
2247 | <varlistentry> | |
2248 | <term><varname>PreferredLifetimeSec=</varname></term> | |
2249 | <term><varname>ValidLifetimeSec=</varname></term> | |
2250 | ||
2251 | <listitem><para>Preferred and valid lifetimes for the prefix measured in | |
2252 | seconds. <varname>PreferredLifetimeSec=</varname> defaults to 604800 | |
2253 | seconds (one week) and <varname>ValidLifetimeSec=</varname> defaults | |
2254 | to 2592000 seconds (30 days).</para></listitem> | |
203d4df5 SS |
2255 | </varlistentry> |
2256 | ||
bd6379ec SS |
2257 | <varlistentry> |
2258 | <term><varname>Assign=</varname></term> | |
2259 | <listitem><para>Takes a boolean. When true, adds an address from the prefix. Default to false. | |
2260 | </para></listitem> | |
2261 | </varlistentry> | |
203d4df5 SS |
2262 | </variablelist> |
2263 | </refsect1> | |
2264 | ||
2265 | <refsect1> | |
2266 | <title>[IPv6RoutePrefix] Section Options</title> | |
2267 | <para>One or more <literal>[IPv6RoutePrefix]</literal> sections contain the IPv6 | |
2268 | prefix routes that are announced via Router Advertisements. See | |
2269 | <ulink url="https://tools.ietf.org/html/rfc4191">RFC 4191</ulink> | |
2270 | for further details.</para> | |
2271 | ||
2272 | <variablelist class='network-directives'> | |
2273 | ||
2274 | <varlistentry> | |
2275 | <term><varname>Route=</varname></term> | |
2276 | ||
2277 | <listitem><para>The IPv6 route that is to be distributed to hosts. | |
2278 | Similarly to configuring static IPv6 routes, the setting is | |
2279 | configured as an IPv6 prefix routes and its prefix route length, | |
2280 | separated by a<literal>/</literal> character. Use multiple | |
2281 | <literal>[IPv6PrefixRoutes]</literal> sections to configure multiple IPv6 | |
2282 | prefix routes.</para></listitem> | |
2283 | </varlistentry> | |
2284 | ||
2285 | <varlistentry> | |
2286 | <term><varname>LifetimeSec=</varname></term> | |
2287 | ||
2288 | <listitem><para>Lifetime for the route prefix measured in | |
2289 | seconds. <varname>LifetimeSec=</varname> defaults to 604800 seconds (one week). | |
2290 | </para></listitem> | |
3f9e0236 PF |
2291 | </varlistentry> |
2292 | ||
2293 | </variablelist> | |
2294 | </refsect1> | |
2295 | ||
2296 | <refsect1> | |
798d3a52 ZJS |
2297 | <title>[Bridge] Section Options</title> |
2298 | <para>The <literal>[Bridge]</literal> section accepts the | |
2299 | following keys.</para> | |
2300 | <variablelist class='network-directives'> | |
165c41a9 SS |
2301 | <varlistentry> |
2302 | <term><varname>UnicastFlood=</varname></term> | |
2303 | <listitem> | |
9b6ffef3 | 2304 | <para>Takes a boolean. Controls whether the bridge should flood |
072f9e4a | 2305 | traffic for which an FDB entry is missing and the destination |
025314d9 | 2306 | is unknown through this port. When unset, the kernel's default will be used. |
47c7dfe2 | 2307 | </para> |
165c41a9 SS |
2308 | </listitem> |
2309 | </varlistentry> | |
7f15b714 TJ |
2310 | <varlistentry> |
2311 | <term><varname>MulticastFlood=</varname></term> | |
2312 | <listitem> | |
2313 | <para>Takes a boolean. Controls whether the bridge should flood | |
2314 | traffic for which an MDB entry is missing and the destination | |
2315 | is unknown through this port. When unset, the kernel's default will be used. | |
2316 | </para> | |
2317 | </listitem> | |
2318 | </varlistentry> | |
d3aa8b49 SS |
2319 | <varlistentry> |
2320 | <term><varname>MulticastToUnicast=</varname></term> | |
2321 | <listitem> | |
2322 | <para>Takes a boolean. Multicast to unicast works on top of the multicast snooping feature of | |
2323 | the bridge. Which means unicast copies are only delivered to hosts which are interested in it. | |
2324 | When unset, the kernel's default will be used. | |
2325 | </para> | |
2326 | </listitem> | |
2327 | </varlistentry> | |
7f15b714 TJ |
2328 | <varlistentry> |
2329 | <term><varname>NeighborSuppression=</varname></term> | |
2330 | <listitem> | |
2331 | <para>Takes a boolean. Configures whether ARP and ND neighbor suppression is enabled for | |
2332 | this port. When unset, the kernel's default will be used. | |
2333 | </para> | |
2334 | </listitem> | |
2335 | </varlistentry> | |
2336 | <varlistentry> | |
2337 | <term><varname>Learning=</varname></term> | |
2338 | <listitem> | |
2339 | <para>Takes a boolean. Configures whether MAC address learning is enabled for | |
2340 | this port. When unset, the kernel's default will be used. | |
2341 | </para> | |
2342 | </listitem> | |
2343 | </varlistentry> | |
165c41a9 SS |
2344 | <varlistentry> |
2345 | <term><varname>HairPin=</varname></term> | |
2346 | <listitem> | |
9b6ffef3 | 2347 | <para>Takes a boolean. Configures whether traffic may be sent back |
025314d9 YW |
2348 | out of the port on which it was received. When this flag is false, and the bridge |
2349 | will not forward traffic back out of the receiving port. | |
2350 | When unset, the kernel's default will be used.</para> | |
165c41a9 SS |
2351 | </listitem> |
2352 | </varlistentry> | |
2353 | <varlistentry> | |
84c34096 | 2354 | <term><varname>UseBPDU=</varname></term> |
165c41a9 | 2355 | <listitem> |
9b6ffef3 | 2356 | <para>Takes a boolean. Configures whether STP Bridge Protocol Data Units will be |
025314d9 | 2357 | processed by the bridge port. When unset, the kernel's default will be used.</para> |
165c41a9 SS |
2358 | </listitem> |
2359 | </varlistentry> | |
2360 | <varlistentry> | |
2361 | <term><varname>FastLeave=</varname></term> | |
2362 | <listitem> | |
9b6ffef3 | 2363 | <para>Takes a boolean. This flag allows the bridge to immediately stop multicast |
a8eaaee7 | 2364 | traffic on a port that receives an IGMP Leave message. It is only used with |
025314d9 | 2365 | IGMP snooping if enabled on the bridge. When unset, the kernel's default will be used.</para> |
165c41a9 SS |
2366 | </listitem> |
2367 | </varlistentry> | |
2368 | <varlistentry> | |
23da66bb | 2369 | <term><varname>AllowPortToBeRoot=</varname></term> |
165c41a9 | 2370 | <listitem> |
9b6ffef3 | 2371 | <para>Takes a boolean. Configures whether a given port is allowed to |
47c7dfe2 | 2372 | become a root port. Only used when STP is enabled on the bridge. |
025314d9 | 2373 | When unset, the kernel's default will be used.</para> |
165c41a9 SS |
2374 | </listitem> |
2375 | </varlistentry> | |
1087623b SS |
2376 | <varlistentry> |
2377 | <term><varname>ProxyARP=</varname></term> | |
2378 | <listitem> | |
2379 | <para>Takes a boolean. Configures whether proxy ARP to be enabled on this port. | |
2380 | When unset, the kernel's default will be used.</para> | |
2381 | </listitem> | |
2382 | </varlistentry> | |
2383 | <varlistentry> | |
2384 | <term><varname>ProxyARPWiFi=</varname></term> | |
2385 | <listitem> | |
2386 | <para>Takes a boolean. Configures whether proxy ARP to be enabled on this port | |
2387 | which meets extended requirements by IEEE 802.11 and Hotspot 2.0 specifications. | |
2388 | When unset, the kernel's default will be used.</para> | |
2389 | </listitem> | |
2390 | </varlistentry> | |
0fadb2a4 SS |
2391 | <varlistentry> |
2392 | <term><varname>MulticastRouter=</varname></term> | |
2393 | <listitem> | |
2394 | <para>Configures this port for having multicast routers attached. A port with a multicast | |
2395 | router will receive all multicast traffic. Takes one of <literal>no</literal> | |
2396 | to disable multicast routers on this port, <literal>query</literal> to let the system detect | |
2397 | the presence of routers, <literal>permanent</literal> to permanently enable multicast traffic | |
2398 | forwarding on this port, or <literal>temporary</literal> to enable multicast routers temporarily | |
2399 | on this port, not depending on incoming queries. When unset, the kernel's default will be used.</para> | |
2400 | </listitem> | |
2401 | </varlistentry> | |
798d3a52 ZJS |
2402 | <varlistentry> |
2403 | <term><varname>Cost=</varname></term> | |
2404 | <listitem> | |
47c7dfe2 | 2405 | <para>Sets the "cost" of sending packets of this interface. |
a8eaaee7 | 2406 | Each port in a bridge may have a different speed and the cost |
798d3a52 | 2407 | is used to decide which link to use. Faster interfaces |
785889e5 | 2408 | should have lower costs. It is an integer value between 1 and |
b56be296 DJL |
2409 | 65535.</para> |
2410 | </listitem> | |
2411 | </varlistentry> | |
2412 | <varlistentry> | |
2413 | <term><varname>Priority=</varname></term> | |
2414 | <listitem> | |
2415 | <para>Sets the "priority" of sending packets on this interface. | |
2416 | Each port in a bridge may have a different priority which is used | |
2417 | to decide which link to use. Lower value means higher priority. | |
785889e5 | 2418 | It is an integer value between 0 to 63. Networkd does not set any |
b56be296 | 2419 | default, meaning the kernel default value of 32 is used.</para> |
798d3a52 ZJS |
2420 | </listitem> |
2421 | </varlistentry> | |
2422 | </variablelist> | |
2423 | </refsect1> | |
798d3a52 ZJS |
2424 | <refsect1> |
2425 | <title>[BridgeFDB] Section Options</title> | |
2426 | <para>The <literal>[BridgeFDB]</literal> section manages the | |
2427 | forwarding database table of a port and accepts the following | |
2428 | keys. Specify several <literal>[BridgeFDB]</literal> sections to | |
2429 | configure several static MAC table entries.</para> | |
2430 | ||
2431 | <variablelist class='network-directives'> | |
2432 | <varlistentry> | |
2433 | <term><varname>MACAddress=</varname></term> | |
2434 | <listitem> | |
2435 | <para>As in the <literal>[Network]</literal> section. This | |
2436 | key is mandatory.</para> | |
2437 | </listitem> | |
2438 | </varlistentry> | |
c2c2793f SS |
2439 | <varlistentry> |
2440 | <term><varname>Destination=</varname></term> | |
2441 | <listitem> | |
2442 | <para>Takes an IP address of the destination VXLAN tunnel endpoint.</para> | |
2443 | </listitem> | |
2444 | </varlistentry> | |
798d3a52 ZJS |
2445 | <varlistentry> |
2446 | <term><varname>VLANId=</varname></term> | |
2447 | <listitem> | |
a8eaaee7 | 2448 | <para>The VLAN ID for the new static MAC table entry. If |
db9b9fb9 | 2449 | omitted, no VLAN ID information is appended to the new static MAC |
798d3a52 ZJS |
2450 | table entry.</para> |
2451 | </listitem> | |
2452 | </varlistentry> | |
61b824c5 SS |
2453 | <varlistentry> |
2454 | <term><varname>VNI=</varname></term> | |
2455 | <listitem> | |
2456 | <para>The VXLAN Network Identifier (or VXLAN Segment ID) to use to connect to | |
2457 | the remote VXLAN tunnel endpoint. Takes a number in the range 1-16777215. | |
2458 | Defaults to unset.</para> | |
2459 | </listitem> | |
2460 | </varlistentry> | |
bdb397ed SS |
2461 | <varlistentry> |
2462 | <term><varname>AssociatedWith=</varname></term> | |
2463 | <listitem> | |
2464 | <para>Specifies where the address is associated with. Takes one of <literal>use</literal>, | |
2465 | <literal>self</literal>, <literal>master</literal> or <literal>router</literal>. | |
2466 | <literal>use</literal> means the address is in use. User space can use this option to | |
2467 | indicate to the kernel that the fdb entry is in use. <literal>self</literal> means | |
2468 | the address is associated with the port drivers fdb. Usually hardware. <literal>master</literal> | |
2469 | means the address is associated with master devices fdb. <literal>router</literal> means | |
2470 | the destination address is associated with a router. Note that it's valid if the referenced | |
2471 | device is a VXLAN type device and has route shortcircuit enabled. Defaults to <literal>self</literal>.</para> | |
2472 | </listitem> | |
2473 | </varlistentry> | |
798d3a52 ZJS |
2474 | </variablelist> |
2475 | </refsect1> | |
06828bb6 | 2476 | |
e9a8c550 SS |
2477 | <refsect1> |
2478 | <title>[LLDP] Section Options</title> | |
2479 | <para>The <literal>[LLDP]</literal> section manages the Link Layer Discovery Protocol (LLDP) and accepts the | |
2480 | following keys.</para> | |
2481 | <variablelist class='network-directives'> | |
2482 | <varlistentry> | |
2483 | <term><varname>MUDURL=</varname></term> | |
2484 | <listitem> | |
2485 | <para>Controls support for Ethernet LLDP packet's Manufacturer Usage Description (MUD). MUD is an embedded software | |
2486 | standard defined by the IETF that allows IoT Device makers to advertise device specifications, including the intended | |
2487 | communication patterns for their device when it connects to the network. The network can then use this intent to author | |
2488 | a context-specific access policy, so the device functions only within those parameters. Takes an URL of length up to 255 | |
2489 | characters. A superficial verification that the string is a valid URL | |
2490 | will be performed. See | |
2491 | <ulink url="https://tools.ietf.org/html/rfc8520">RFC 8520</ulink> for details. The MUD URL received | |
2492 | from the LLDP packets will be saved at the state files and can be read via | |
2493 | <function>sd_lldp_neighbor_get_mud_url()</function> function.</para> | |
2494 | </listitem> | |
2495 | </varlistentry> | |
2496 | </variablelist> | |
2497 | </refsect1> | |
2498 | ||
06828bb6 HP |
2499 | <refsect1> |
2500 | <title>[CAN] Section Options</title> | |
2501 | <para>The <literal>[CAN]</literal> section manages the Controller Area Network (CAN bus) and accepts the | |
2502 | following keys.</para> | |
2503 | <variablelist class='network-directives'> | |
2504 | <varlistentry> | |
2505 | <term><varname>BitRate=</varname></term> | |
2506 | <listitem> | |
2507 | <para>The bitrate of CAN device in bits per second. The usual SI prefixes (K, M) with the base of 1000 can | |
74a27268 | 2508 | be used here. Takes a number in the range 1..4294967295.</para> |
06828bb6 HP |
2509 | </listitem> |
2510 | </varlistentry> | |
2511 | <varlistentry> | |
2512 | <term><varname>SamplePoint=</varname></term> | |
2513 | <listitem> | |
2514 | <para>Optional sample point in percent with one decimal (e.g. <literal>75%</literal>, | |
2515 | <literal>87.5%</literal>) or permille (e.g. <literal>875‰</literal>).</para> | |
2516 | </listitem> | |
2517 | </varlistentry> | |
7e025e9c RP |
2518 | <varlistentry> |
2519 | <term><varname>DataBitRate=</varname></term> | |
2520 | <term><varname>DataSamplePoint=</varname></term> | |
2521 | <listitem> | |
2522 | <para>The bitrate and sample point for the data phase, if CAN-FD is used. These settings are | |
2523 | analogous to the <varname>BitRate=</varname> and <varname>SamplePoint=</varname> keys.</para> | |
2524 | </listitem> | |
2525 | </varlistentry> | |
2526 | <varlistentry> | |
2527 | <term><varname>FDMode=</varname></term> | |
2528 | <listitem> | |
2529 | <para>Takes a boolean. When <literal>yes</literal>, CAN-FD mode is enabled for the interface. | |
2530 | Note, that a bitrate and optional sample point should also be set for the CAN-FD data phase using | |
2531 | the <varname>DataBitRate=</varname> and <varname>DataSamplePoint=</varname> keys.</para> | |
2532 | </listitem> | |
2533 | </varlistentry> | |
2534 | <varlistentry> | |
2535 | <term><varname>FDNonISO=</varname></term> | |
2536 | <listitem> | |
2537 | <para>Takes a boolean. When <literal>yes</literal>, non-ISO CAN-FD mode is enabled for the | |
2538 | interface. When unset, the kernel's default will be used.</para> | |
2539 | </listitem> | |
2540 | </varlistentry> | |
06828bb6 HP |
2541 | <varlistentry> |
2542 | <term><varname>RestartSec=</varname></term> | |
2543 | <listitem> | |
2544 | <para>Automatic restart delay time. If set to a non-zero value, a restart of the CAN controller will be | |
2545 | triggered automatically in case of a bus-off condition after the specified delay time. Subsecond delays can | |
2546 | be specified using decimals (e.g. <literal>0.1s</literal>) or a <literal>ms</literal> or | |
2547 | <literal>us</literal> postfix. Using <literal>infinity</literal> or <literal>0</literal> will turn the | |
2548 | automatic restart off. By default automatic restart is disabled.</para> | |
2549 | </listitem> | |
2550 | </varlistentry> | |
52aa38f1 MR |
2551 | <varlistentry> |
2552 | <term><varname>Termination=</varname></term> | |
2553 | <listitem> | |
2554 | <para>Takes a boolean. When <literal>yes</literal>, the termination resistor will be selected for | |
2555 | the bias network. When unset, the kernel's default will be used.</para> | |
2556 | </listitem> | |
2557 | </varlistentry> | |
c423be28 CG |
2558 | <varlistentry> |
2559 | <term><varname>TripleSampling=</varname></term> | |
2560 | <listitem> | |
2561 | <para>Takes a boolean. When <literal>yes</literal>, three samples (instead of one) are used to determine | |
2562 | the value of a received bit by majority rule. When unset, the kernel's default will be used.</para> | |
2563 | </listitem> | |
2564 | </varlistentry> | |
74f0fb90 YW |
2565 | <varlistentry> |
2566 | <term><varname>ListenOnly=</varname></term> | |
2567 | <listitem> | |
2568 | <para>Takes a boolean. When <literal>yes</literal>, listen-only mode is enabled. When the | |
2569 | interface is in listen-only mode, the interface neither transmit CAN frames nor send ACK | |
2570 | bit. Listen-only mode is important to debug CAN networks without interfering with the | |
2571 | communication or acknowledge the CAN frame. When unset, the kernel's default will be used. | |
2572 | </para> | |
2573 | </listitem> | |
2574 | </varlistentry> | |
06828bb6 HP |
2575 | </variablelist> |
2576 | </refsect1> | |
2577 | ||
2ed5f6d5 YW |
2578 | <refsect1> |
2579 | <title>[QDisc] Section Options</title> | |
2580 | <para>The <literal>[QDisc]</literal> section manages the traffic control queueing discipline (qdisc).</para> | |
2581 | ||
2582 | <variablelist class='network-directives'> | |
2583 | <varlistentry> | |
2584 | <term><varname>Parent=</varname></term> | |
2585 | <listitem> | |
2586 | <para>Specifies the parent Queueing Discipline (qdisc). Takes one of <literal>clsact</literal> | |
2587 | or <literal>ingress</literal>. This is mandatory.</para> | |
2588 | </listitem> | |
2589 | </varlistentry> | |
d8b2396d | 2590 | |
f344a492 | 2591 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> |
2ed5f6d5 YW |
2592 | </variablelist> |
2593 | </refsect1> | |
2594 | ||
0f5bd7fe | 2595 | <refsect1> |
18de0969 YW |
2596 | <title>[NetworkEmulator] Section Options</title> |
2597 | <para>The <literal>[NetworkEmulator]</literal> section manages the queueing discipline (qdisc) of | |
2598 | the network emulator. It can be used to configure the kernel packet scheduler and simulate packet | |
2599 | delay and loss for UDP or TCP applications, or limit the bandwidth usage of a particular service to | |
2600 | simulate internet connections.</para> | |
0f5bd7fe SS |
2601 | |
2602 | <variablelist class='network-directives'> | |
f344a492 YW |
2603 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2604 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
d8b2396d | 2605 | |
0f5bd7fe | 2606 | <varlistentry> |
18de0969 | 2607 | <term><varname>DelaySec=</varname></term> |
0f5bd7fe SS |
2608 | <listitem> |
2609 | <para>Specifies the fixed amount of delay to be added to all packets going out of the | |
2610 | interface. Defaults to unset.</para> | |
2611 | </listitem> | |
2612 | </varlistentry> | |
2613 | ||
2614 | <varlistentry> | |
18de0969 | 2615 | <term><varname>DelayJitterSec=</varname></term> |
0f5bd7fe SS |
2616 | <listitem> |
2617 | <para>Specifies the chosen delay to be added to the packets outgoing to the network | |
2618 | interface. Defaults to unset.</para> | |
2619 | </listitem> | |
2620 | </varlistentry> | |
2621 | ||
2622 | <varlistentry> | |
18de0969 | 2623 | <term><varname>PacketLimit=</varname></term> |
0f5bd7fe SS |
2624 | <listitem> |
2625 | <para>Specifies the maximum number of packets the qdisc may hold queued at a time. | |
2626 | An unsigned integer ranges 0 to 4294967294. Defaults to 1000.</para> | |
2627 | </listitem> | |
2628 | </varlistentry> | |
2629 | ||
2630 | <varlistentry> | |
18de0969 | 2631 | <term><varname>LossRate=</varname></term> |
0f5bd7fe SS |
2632 | <listitem> |
2633 | <para>Specifies an independent loss probability to be added to the packets outgoing from the | |
2634 | network interface. Takes a percentage value, suffixed with "%". Defaults to unset.</para> | |
2635 | </listitem> | |
2636 | </varlistentry> | |
2637 | ||
b9c5aa3c | 2638 | <varlistentry> |
18de0969 | 2639 | <term><varname>DuplicateRate=</varname></term> |
b9c5aa3c SS |
2640 | <listitem> |
2641 | <para>Specifies that the chosen percent of packets is duplicated before queuing them. | |
2642 | Takes a percentage value, suffixed with "%". Defaults to unset.</para> | |
2643 | </listitem> | |
2644 | </varlistentry> | |
18de0969 YW |
2645 | </variablelist> |
2646 | </refsect1> | |
b9c5aa3c | 2647 | |
18de0969 | 2648 | <refsect1> |
60ed2dcf ZJS |
2649 | <title>[TokenBucketFilter] Section Options</title> |
2650 | <para>The <literal>[TokenBucketFilter]</literal> section manages the queueing discipline (qdisc) of | |
2651 | token bucket filter (tbf).</para> | |
18de0969 YW |
2652 | |
2653 | <variablelist class='network-directives'> | |
f344a492 YW |
2654 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2655 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
d8b2396d | 2656 | |
18de0969 YW |
2657 | <varlistentry> |
2658 | <term><varname>LatencySec=</varname></term> | |
ba5841b5 SS |
2659 | <listitem> |
2660 | <para>Specifies the latency parameter, which specifies the maximum amount of time a | |
60ed2dcf | 2661 | packet can sit in the Token Bucket Filter (TBF). Defaults to unset.</para> |
ba5841b5 SS |
2662 | </listitem> |
2663 | </varlistentry> | |
2664 | ||
dcfc23ae | 2665 | <varlistentry> |
18de0969 | 2666 | <term><varname>LimitSize=</varname></term> |
dcfc23ae YW |
2667 | <listitem> |
2668 | <para>Takes the number of bytes that can be queued waiting for tokens to become available. | |
2669 | When the size is suffixed with K, M, or G, it is parsed as Kilobytes, Megabytes, or Gigabytes, | |
2670 | respectively, to the base of 1000. Defaults to unset.</para> | |
2671 | </listitem> | |
2672 | </varlistentry> | |
2673 | ||
ba5841b5 | 2674 | <varlistentry> |
18de0969 | 2675 | <term><varname>Burst=</varname></term> |
ba5841b5 SS |
2676 | <listitem> |
2677 | <para>Specifies the size of the bucket. This is the maximum amount of bytes that tokens | |
2678 | can be available for instantaneous transfer. When the size is suffixed with K, M, or G, it is | |
2679 | parsed as Kilobytes, Megabytes, or Gigabytes, respectively, to the base of 1000. Defaults to | |
2680 | unset.</para> | |
2681 | </listitem> | |
2682 | </varlistentry> | |
2683 | ||
2684 | <varlistentry> | |
18de0969 | 2685 | <term><varname>Rate=</varname></term> |
ba5841b5 SS |
2686 | <listitem> |
2687 | <para>Specifies the device specific bandwidth. When suffixed with K, M, or G, the specified | |
6b8fe4c3 | 2688 | bandwidth is parsed as Kilobits, Megabits, or Gigabits, respectively, to the base of 1000. |
ba5841b5 SS |
2689 | Defaults to unset.</para> |
2690 | </listitem> | |
2691 | </varlistentry> | |
2692 | ||
dcfc23ae | 2693 | <varlistentry> |
18de0969 | 2694 | <term><varname>MPUBytes=</varname></term> |
dcfc23ae YW |
2695 | <listitem> |
2696 | <para>The Minimum Packet Unit (MPU) determines the minimal token usage (specified in bytes) | |
2697 | for a packet. When suffixed with K, M, or G, the specified size is parsed as Kilobytes, | |
2698 | Megabytes, or Gigabytes, respectively, to the base of 1000. Defaults to zero.</para> | |
2699 | </listitem> | |
2700 | </varlistentry> | |
2701 | ||
2702 | <varlistentry> | |
18de0969 | 2703 | <term><varname>PeakRate=</varname></term> |
dcfc23ae YW |
2704 | <listitem> |
2705 | <para>Takes the maximum depletion rate of the bucket. When suffixed with K, M, or G, the | |
6b8fe4c3 | 2706 | specified size is parsed as Kilobits, Megabits, or Gigabits, respectively, to the base of |
dcfc23ae YW |
2707 | 1000. Defaults to unset.</para> |
2708 | </listitem> | |
2709 | </varlistentry> | |
2710 | ||
2711 | <varlistentry> | |
18de0969 | 2712 | <term><varname>MTUBytes=</varname></term> |
dcfc23ae YW |
2713 | <listitem> |
2714 | <para>Specifies the size of the peakrate bucket. When suffixed with K, M, or G, the specified | |
2715 | size is parsed as Kilobytes, Megabytes, or Gigabytes, respectively, to the base of 1000. | |
2716 | Defaults to unset.</para> | |
2717 | </listitem> | |
2718 | </varlistentry> | |
18de0969 YW |
2719 | </variablelist> |
2720 | </refsect1> | |
2721 | ||
bde4ae88 SS |
2722 | <refsect1> |
2723 | <title>[PIE] Section Options</title> | |
2724 | <para>The <literal>[PIE]</literal> section manages the queueing discipline | |
2725 | (qdisc) of Proportional Integral controller-Enhanced (PIE).</para> | |
2726 | ||
2727 | <variablelist class='network-directives'> | |
f344a492 YW |
2728 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2729 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
bde4ae88 SS |
2730 | |
2731 | <varlistentry> | |
2732 | <term><varname>PacketLimit=</varname></term> | |
2733 | <listitem> | |
2734 | <para>Specifies the hard limit on the queue size in number of packets. When this limit is reached, incoming packets are | |
2735 | dropped. An unsigned integer ranges 1 to 4294967294. Defaults to unset and kernel's default is used.</para> | |
2736 | </listitem> | |
2737 | </varlistentry> | |
2738 | </variablelist> | |
2739 | </refsect1> | |
2740 | ||
982998b0 SS |
2741 | <refsect1> |
2742 | <title>[StochasticFairBlue] Section Options</title> | |
2743 | <para>The <literal>[StochasticFairBlue]</literal> section manages the queueing discipline | |
2744 | (qdisc) of stochastic fair blue (sfb).</para> | |
2745 | ||
2746 | <variablelist class='network-directives'> | |
f344a492 YW |
2747 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2748 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
982998b0 SS |
2749 | |
2750 | <varlistentry> | |
2751 | <term><varname>PacketLimit=</varname></term> | |
2752 | <listitem> | |
2753 | <para>Specifies the hard limit on the queue size in number of packets. When this limit is reached, incoming packets are | |
2754 | dropped. An unsigned integer ranges 0 to 4294967294. Defaults to unset and kernel's default is used.</para> | |
2755 | </listitem> | |
2756 | </varlistentry> | |
2757 | </variablelist> | |
2758 | </refsect1> | |
2759 | ||
18de0969 YW |
2760 | <refsect1> |
2761 | <title>[StochasticFairnessQueueing] Section Options</title> | |
2762 | <para>The <literal>[StochasticFairnessQueueing]</literal> section manages the queueing discipline | |
2763 | (qdisc) of stochastic fairness queueing (sfq).</para> | |
2764 | ||
2765 | <variablelist class='network-directives'> | |
f344a492 YW |
2766 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2767 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
d8b2396d | 2768 | |
9942b710 | 2769 | <varlistentry> |
18de0969 | 2770 | <term><varname>PerturbPeriodSec=</varname></term> |
9942b710 SS |
2771 | <listitem> |
2772 | <para>Specifies the interval in seconds for queue algorithm perturbation. Defaults to unset.</para> | |
2773 | </listitem> | |
2774 | </varlistentry> | |
18de0969 YW |
2775 | </variablelist> |
2776 | </refsect1> | |
2777 | ||
c853f594 SS |
2778 | <refsect1> |
2779 | <title>[BFIFO] Section Options</title> | |
2780 | <para>The <literal>[BFIFO]</literal> section manages the queueing discipline (qdisc) of | |
2781 | Byte limited Packet First In First Out (bfifo).</para> | |
2782 | ||
2783 | <variablelist class='network-directives'> | |
f344a492 YW |
2784 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2785 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
c853f594 SS |
2786 | |
2787 | <varlistentry> | |
2788 | <term><varname>LimitSize=</varname></term> | |
2789 | <listitem> | |
2790 | <para>Specifies the hard limit on the FIFO size in bytes. The size limit (a buffer size) to prevent it | |
2791 | from overflowing in case it is unable to dequeue packets as quickly as it receives them. When this limit | |
2792 | is reached, incoming packets are dropped. When suffixed with K, M, or G, the specified size is parsed as | |
2793 | Kilobytes, Megabytes, or Gigabytes, respectively, to the base of 1024. Defaults to unset and kernel's default is used.</para> | |
2794 | </listitem> | |
2795 | </varlistentry> | |
2796 | </variablelist> | |
2797 | </refsect1> | |
2798 | ||
a7476065 SS |
2799 | <refsect1> |
2800 | <title>[PFIFO] Section Options</title> | |
2801 | <para>The <literal>[PFIFO]</literal> section manages the queueing discipline (qdisc) of | |
2802 | Packet First In First Out (pfifo).</para> | |
2803 | ||
2804 | <variablelist class='network-directives'> | |
f344a492 YW |
2805 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2806 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
a7476065 SS |
2807 | |
2808 | <varlistentry> | |
2809 | <term><varname>PacketLimit=</varname></term> | |
2810 | <listitem> | |
2811 | <para>Specifies the hard limit on the FIFO size in number of packets. The size limit (a buffer size) to prevent it | |
2812 | from overflowing in case it is unable to dequeue packets as quickly as it receives them. When this limit is reached, | |
2813 | incoming packets are dropped. An unsigned integer ranges 0 to 4294967294. Defaults to unset and kernel's default is used.</para> | |
2814 | </listitem> | |
2815 | </varlistentry> | |
ad8352f4 SS |
2816 | </variablelist> |
2817 | </refsect1> | |
2818 | ||
053a2ddb SS |
2819 | <refsect1> |
2820 | <title>[PFIFOHeadDrop] Section Options</title> | |
2821 | <para>The <literal>[PFIFOHeadDrop]</literal> section manages the queueing discipline (qdisc) of | |
2822 | Packet First In First Out Head Drop (pfifo_head_drop).</para> | |
2823 | ||
2824 | <variablelist class='network-directives'> | |
f344a492 YW |
2825 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2826 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
053a2ddb SS |
2827 | |
2828 | <varlistentry> | |
2829 | <term><varname>PacketLimit=</varname></term> | |
2830 | <listitem> | |
2831 | <para>As in <literal>[PFIFO]</literal> section.</para></listitem> | |
2832 | </varlistentry> | |
2833 | </variablelist> | |
2834 | </refsect1> | |
2835 | ||
1a95964b SS |
2836 | <refsect1> |
2837 | <title>[PFIFOFast] Section Options</title> | |
2838 | <para>The <literal>[PFIFOFast]</literal> section manages the queueing discipline (qdisc) of | |
2839 | Packet First In First Out Fast (pfifo_fast).</para> | |
2840 | ||
2841 | <variablelist class='network-directives'> | |
f344a492 YW |
2842 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2843 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
1a95964b SS |
2844 | </variablelist> |
2845 | </refsect1> | |
2846 | ||
ad8352f4 SS |
2847 | <refsect1> |
2848 | <title>[CAKE] Section Options</title> | |
2849 | <para>The <literal>[CAKE]</literal> section manages the queueing discipline (qdisc) of | |
2850 | Common Applications Kept Enhanced (CAKE).</para> | |
2851 | ||
2852 | <variablelist class='network-directives'> | |
f344a492 YW |
2853 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2854 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
a7476065 | 2855 | |
ad8352f4 | 2856 | <varlistentry> |
ad8352f4 SS |
2857 | <term><varname>Overhead=</varname></term> |
2858 | <listitem> | |
2859 | <para>Specifies that bytes to be addeded to the size of each packet. Bytes may be negative. | |
2860 | Takes an integer ranges -64 to 256. Defaults to unset and kernel's default is used.</para> | |
2861 | </listitem> | |
f344a492 | 2862 | </varlistentry> |
ad8352f4 SS |
2863 | |
2864 | <varlistentry> | |
2865 | <term><varname>Bandwidth=</varname></term> | |
2866 | <listitem> | |
2867 | <para>Specifies the shaper bandwidth. When suffixed with K, M, or G, the specified size is | |
2868 | parsed as Kilobits, Megabits, or Gigabits, respectively, to the base of 1000. Defaults to | |
2869 | unset and kernel's default is used.</para> | |
2870 | </listitem> | |
2871 | </varlistentry> | |
a7476065 SS |
2872 | </variablelist> |
2873 | </refsect1> | |
2874 | ||
18de0969 YW |
2875 | <refsect1> |
2876 | <title>[ControlledDelay] Section Options</title> | |
2877 | <para>The <literal>[ControlledDelay]</literal> section manages the queueing discipline (qdisc) of | |
2878 | controlled delay (CoDel).</para> | |
9942b710 | 2879 | |
18de0969 | 2880 | <variablelist class='network-directives'> |
f344a492 YW |
2881 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2882 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
d8b2396d | 2883 | |
18de0969 YW |
2884 | <varlistentry> |
2885 | <term><varname>PacketLimit=</varname></term> | |
a9a5d632 | 2886 | <listitem> |
2cd65106 | 2887 | <para>Specifies the hard limit on the queue size in number of packets. When this limit is reached, incoming packets are |
a9a5d632 SS |
2888 | dropped. An unsigned integer ranges 0 to 4294967294. Defaults to unset and kernel's default is used.</para> |
2889 | </listitem> | |
2890 | </varlistentry> | |
2891 | ||
b078e528 | 2892 | <varlistentry> |
18de0969 | 2893 | <term><varname>TargetSec=</varname></term> |
b078e528 YW |
2894 | <listitem> |
2895 | <para>Takes a timespan. Specifies the acceptable minimum standing/persistent queue delay. | |
2896 | Defaults to unset and kernel's default is used.</para> | |
2897 | </listitem> | |
2898 | </varlistentry> | |
2899 | ||
2900 | <varlistentry> | |
18de0969 | 2901 | <term><varname>IntervalSec=</varname></term> |
b078e528 YW |
2902 | <listitem> |
2903 | <para>Takes a timespan. This is used to ensure that the measured minimum delay does not | |
2904 | become too stale. Defaults to unset and kernel's default is used.</para> | |
2905 | </listitem> | |
2906 | </varlistentry> | |
2907 | ||
2908 | <varlistentry> | |
18de0969 | 2909 | <term><varname>ECN=</varname></term> |
b078e528 YW |
2910 | <listitem> |
2911 | <para>Takes a boolean. This can be used to mark packets instead of dropping them. Defaults to | |
2912 | unset and kernel's default is used.</para> | |
2913 | </listitem> | |
2914 | </varlistentry> | |
2915 | ||
2916 | <varlistentry> | |
18de0969 | 2917 | <term><varname>CEThresholdSec=</varname></term> |
b078e528 YW |
2918 | <listitem> |
2919 | <para>Takes a timespan. This sets a threshold above which all packets are marked with ECN | |
2920 | Congestion Experienced (CE). Defaults to unset and kernel's default is used.</para> | |
2921 | </listitem> | |
2922 | </varlistentry> | |
18de0969 YW |
2923 | </variablelist> |
2924 | </refsect1> | |
b078e528 | 2925 | |
f5fc0441 SS |
2926 | <refsect1> |
2927 | <title>[DeficitRoundRobinScheduler] Section Options</title> | |
2928 | <para>The <literal>[DeficitRoundRobinScheduler]</literal> section manages the queueing discipline (qdisc) of | |
2929 | Deficit Round Robin Scheduler (DRR).</para> | |
2930 | ||
2931 | <variablelist class='network-directives'> | |
f344a492 YW |
2932 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2933 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
f5fc0441 SS |
2934 | </variablelist> |
2935 | </refsect1> | |
2936 | ||
ad365c5d YW |
2937 | <refsect1> |
2938 | <title>[DeficitRoundRobinSchedulerClass] Section Options</title> | |
2939 | <para>The <literal>[DeficitRoundRobinSchedulerClass]</literal> section manages the traffic control class of | |
2940 | Deficit Round Robin Scheduler (DRR).</para> | |
2941 | ||
2942 | <variablelist class='network-directives'> | |
f344a492 YW |
2943 | <xi:include href="tc.xml" xpointer="tclass-parent" /> |
2944 | <xi:include href="tc.xml" xpointer="tclass-classid" /> | |
ad365c5d YW |
2945 | |
2946 | <varlistentry> | |
2947 | <term><varname>Quantum=</varname></term> | |
2948 | <listitem> | |
2949 | <para>Specifies the amount of bytes a flow is allowed to dequeue before the | |
2950 | scheduler moves to the next class. An unsigned integer ranges 1 to 4294967294. | |
2951 | Defaults to the MTU of the interface.</para> | |
2952 | </listitem> | |
2953 | </varlistentry> | |
2954 | ||
2955 | </variablelist> | |
2956 | </refsect1> | |
2957 | ||
609e8340 SS |
2958 | <refsect1> |
2959 | <title>[GenericRandomEarlyDetection] Section Options</title> | |
2960 | <para>The <literal>[GenericRandomEarlyDetection]</literal> section manages the queueing discipline | |
2961 | (qdisc) of Generic Random Early Detection (GRED).</para> | |
2962 | ||
2963 | <variablelist class='network-directives'> | |
f344a492 YW |
2964 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2965 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
609e8340 SS |
2966 | |
2967 | <varlistentry> | |
2968 | <term><varname>VirtualQueues=</varname></term> | |
2969 | <listitem> | |
2970 | <para>Specifies the number of virtual queues. Takes a integer in the range 1-16. Defaults to unset and kernel's default is used.</para> | |
2971 | </listitem> | |
2972 | </varlistentry> | |
2973 | ||
2974 | <varlistentry> | |
2975 | <term><varname>DefaultVirtualQueue=</varname></term> | |
2976 | <listitem> | |
2977 | <para>Specifies the number of default virtual queue. This must be less than <varname>VirtualQueue=</varname>. | |
2978 | Defaults to unset and kernel's default is used.</para> | |
2979 | </listitem> | |
2980 | </varlistentry> | |
2981 | ||
2982 | <varlistentry> | |
2983 | <term><varname>GenericRIO=</varname></term> | |
2984 | <listitem> | |
2985 | <para>Takes a boolean. It turns on the RIO-like buffering scheme. Defaults to | |
2986 | unset and kernel's default is used.</para> | |
2987 | </listitem> | |
2988 | </varlistentry> | |
2989 | </variablelist> | |
2990 | </refsect1> | |
2991 | ||
18de0969 YW |
2992 | <refsect1> |
2993 | <title>[FairQueueingControlledDelay] Section Options</title> | |
2994 | <para>The <literal>[FairQueueingControlledDelay]</literal> section manages the queueing discipline | |
2995 | (qdisc) of fair queuing controlled delay (FQ-CoDel).</para> | |
2996 | ||
2997 | <variablelist class='network-directives'> | |
f344a492 YW |
2998 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
2999 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
d8b2396d | 3000 | |
18de0969 YW |
3001 | <varlistentry> |
3002 | <term><varname>PacketLimit=</varname></term> | |
4e5ef149 SS |
3003 | <listitem> |
3004 | <para>Specifies the hard limit on the real queue size. When this limit is reached, incoming packets are | |
3005 | dropped. Defaults to unset and kernel's default is used.</para> | |
3006 | </listitem> | |
3007 | </varlistentry> | |
3008 | ||
ac810b75 | 3009 | <varlistentry> |
18de0969 | 3010 | <term><varname>MemoryLimit=</varname></term> |
ac810b75 YW |
3011 | <listitem> |
3012 | <para>Specifies the limit on the total number of bytes that can be queued in this FQ-CoDel instance. | |
3013 | When suffixed with K, M, or G, the specified size is parsed as Kilobytes, Megabytes, or Gigabytes, | |
3014 | respectively, to the base of 1024. Defaults to unset and kernel's default is used.</para> | |
3015 | </listitem> | |
3016 | </varlistentry> | |
3017 | ||
3018 | <varlistentry> | |
18de0969 | 3019 | <term><varname>Flows=</varname></term> |
ac810b75 YW |
3020 | <listitem> |
3021 | <para>Specifies the number of flows into which the incoming packets are classified. | |
3022 | Defaults to unset and kernel's default is used.</para> | |
3023 | </listitem> | |
3024 | </varlistentry> | |
3025 | ||
3026 | <varlistentry> | |
18de0969 | 3027 | <term><varname>TargetSec=</varname></term> |
ac810b75 YW |
3028 | <listitem> |
3029 | <para>Takes a timespan. Specifies the acceptable minimum standing/persistent queue delay. | |
3030 | Defaults to unset and kernel's default is used.</para> | |
3031 | </listitem> | |
3032 | </varlistentry> | |
3033 | ||
3034 | <varlistentry> | |
18de0969 | 3035 | <term><varname>IntervalSec=</varname></term> |
ac810b75 YW |
3036 | <listitem> |
3037 | <para>Takes a timespan. This is used to ensure that the measured minimum delay does not | |
3038 | become too stale. Defaults to unset and kernel's default is used.</para> | |
3039 | </listitem> | |
3040 | </varlistentry> | |
3041 | ||
3042 | <varlistentry> | |
18de0969 | 3043 | <term><varname>Quantum=</varname></term> |
ac810b75 YW |
3044 | <listitem> |
3045 | <para>Specifies the number of bytes used as 'deficit' in the fair queuing algorithmtimespan. | |
3046 | When suffixed with K, M, or G, the specified size is parsed as Kilobytes, Megabytes, or Gigabytes, | |
3047 | respectively, to the base of 1024. Defaults to unset and kernel's default is used.</para> | |
3048 | </listitem> | |
3049 | </varlistentry> | |
3050 | ||
3051 | <varlistentry> | |
18de0969 | 3052 | <term><varname>ECN=</varname></term> |
ac810b75 YW |
3053 | <listitem> |
3054 | <para>Takes a boolean. This can be used to mark packets instead of dropping them. Defaults to | |
3055 | unset and kernel's default is used.</para> | |
3056 | </listitem> | |
3057 | </varlistentry> | |
3058 | ||
3059 | <varlistentry> | |
18de0969 | 3060 | <term><varname>CEThresholdSec=</varname></term> |
ac810b75 YW |
3061 | <listitem> |
3062 | <para>Takes a timespan. This sets a threshold above which all packets are marked with ECN | |
3063 | Congestion Experienced (CE). Defaults to unset and kernel's default is used.</para> | |
3064 | </listitem> | |
3065 | </varlistentry> | |
18de0969 YW |
3066 | </variablelist> |
3067 | </refsect1> | |
3068 | ||
3069 | <refsect1> | |
ca58d00c ZJS |
3070 | <title>[FairQueueing] Section Options</title> |
3071 | <para>The <literal>[FairQueueing]</literal> section manages the queueing discipline | |
18de0969 YW |
3072 | (qdisc) of fair queue traffic policing (FQ).</para> |
3073 | ||
3074 | <variablelist class='network-directives'> | |
f344a492 YW |
3075 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
3076 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
d8b2396d | 3077 | |
7234b915 | 3078 | <varlistentry> |
18de0969 | 3079 | <term><varname>PacketLimit=</varname></term> |
7234b915 SS |
3080 | <listitem> |
3081 | <para>Specifies the hard limit on the real queue size. When this limit is reached, incoming packets are | |
3082 | dropped. Defaults to unset and kernel's default is used.</para> | |
3083 | </listitem> | |
3084 | </varlistentry> | |
3085 | ||
e83562e5 | 3086 | <varlistentry> |
18de0969 | 3087 | <term><varname>FlowLimit=</varname></term> |
e83562e5 YW |
3088 | <listitem> |
3089 | <para>Specifies the hard limit on the maximum number of packets queued per flow. Defaults to | |
3090 | unset and kernel's default is used.</para> | |
3091 | </listitem> | |
3092 | </varlistentry> | |
3093 | ||
3094 | <varlistentry> | |
18de0969 | 3095 | <term><varname>Quantum=</varname></term> |
e83562e5 YW |
3096 | <listitem> |
3097 | <para>Specifies the credit per dequeue RR round, i.e. the amount of bytes a flow is allowed | |
3098 | to dequeue at once. When suffixed with K, M, or G, the specified size is parsed as Kilobytes, | |
3099 | Megabytes, or Gigabytes, respectively, to the base of 1024. Defaults to unset and kernel's | |
3100 | default is used.</para> | |
3101 | </listitem> | |
3102 | </varlistentry> | |
3103 | ||
3104 | <varlistentry> | |
18de0969 | 3105 | <term><varname>InitialQuantum=</varname></term> |
e83562e5 YW |
3106 | <listitem> |
3107 | <para>Specifies the initial sending rate credit, i.e. the amount of bytes a new flow is | |
3108 | allowed to dequeue initially. When suffixed with K, M, or G, the specified size is parsed as | |
3109 | Kilobytes, Megabytes, or Gigabytes, respectively, to the base of 1024. Defaults to unset and | |
3110 | kernel's default is used.</para> | |
3111 | </listitem> | |
3112 | </varlistentry> | |
3113 | ||
3114 | <varlistentry> | |
18de0969 | 3115 | <term><varname>MaximumRate=</varname></term> |
e83562e5 YW |
3116 | <listitem> |
3117 | <para>Specifies the maximum sending rate of a flow. When suffixed with K, M, or G, the | |
6b8fe4c3 | 3118 | specified size is parsed as Kilobits, Megabits, or Gigabits, respectively, to the base of |
e83562e5 YW |
3119 | 1000. Defaults to unset and kernel's default is used.</para> |
3120 | </listitem> | |
3121 | </varlistentry> | |
3122 | ||
3123 | <varlistentry> | |
18de0969 | 3124 | <term><varname>Buckets=</varname></term> |
e83562e5 YW |
3125 | <listitem> |
3126 | <para>Specifies the size of the hash table used for flow lookups. Defaults to unset and | |
3127 | kernel's default is used.</para> | |
3128 | </listitem> | |
3129 | </varlistentry> | |
3130 | ||
3131 | <varlistentry> | |
18de0969 | 3132 | <term><varname>OrphanMask=</varname></term> |
e83562e5 YW |
3133 | <listitem> |
3134 | <para>Takes an unsigned integer. For packets not owned by a socket, fq is able to mask a part | |
3135 | of hash and reduce number of buckets associated with the traffic. Defaults to unset and | |
3136 | kernel's default is used.</para> | |
3137 | </listitem> | |
3138 | </varlistentry> | |
3139 | ||
3140 | <varlistentry> | |
18de0969 | 3141 | <term><varname>Pacing=</varname></term> |
e83562e5 YW |
3142 | <listitem> |
3143 | <para>Takes a boolean, and enables or disables flow pacing. Defaults to unset and kernel's | |
3144 | default is used.</para> | |
3145 | </listitem> | |
3146 | </varlistentry> | |
3147 | ||
3148 | <varlistentry> | |
18de0969 | 3149 | <term><varname>CEThresholdSec=</varname></term> |
e83562e5 YW |
3150 | <listitem> |
3151 | <para>Takes a timespan. This sets a threshold above which all packets are marked with ECN | |
3152 | Congestion Experienced (CE). Defaults to unset and kernel's default is used.</para> | |
3153 | </listitem> | |
3154 | </varlistentry> | |
0f5bd7fe SS |
3155 | </variablelist> |
3156 | </refsect1> | |
3157 | ||
9b749c11 YW |
3158 | <refsect1> |
3159 | <title>[TrivialLinkEqualizer] Section Options</title> | |
3160 | <para>The <literal>[TrivialLinkEqualizer]</literal> section manages the queueing discipline (qdisc) of | |
3161 | trivial link equalizer (teql).</para> | |
3162 | ||
3163 | <variablelist class='network-directives'> | |
f344a492 YW |
3164 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
3165 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
d8b2396d | 3166 | |
9b749c11 YW |
3167 | <varlistentry> |
3168 | <term><varname>Id=</varname></term> | |
3169 | <listitem> | |
3170 | <para>Specifies the interface ID <literal>N</literal> of teql. Defaults to <literal>0</literal>. | |
3171 | Note that when teql is used, currently, the module <constant>sch_teql</constant> with | |
3172 | <constant>max_equalizers=N+1</constant> option must be loaded before | |
3173 | <command>systemd-networkd</command> is started.</para> | |
3174 | </listitem> | |
3175 | </varlistentry> | |
3176 | </variablelist> | |
3177 | </refsect1> | |
3178 | ||
b934ac3d YW |
3179 | <refsect1> |
3180 | <title>[HierarchyTokenBucket] Section Options</title> | |
3181 | <para>The <literal>[HierarchyTokenBucket]</literal> section manages the queueing discipline (qdisc) of | |
3182 | hierarchy token bucket (htb).</para> | |
3183 | ||
3184 | <variablelist class='network-directives'> | |
f344a492 YW |
3185 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
3186 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
b934ac3d YW |
3187 | |
3188 | <varlistentry> | |
3189 | <term><varname>DefaultClass=</varname></term> | |
3190 | <listitem> | |
3191 | <para>Takes the minor id in hexadecimal of the default class. Unclassified traffic gets sent | |
3192 | to the class. Defaults to unset.</para> | |
3193 | </listitem> | |
3194 | </varlistentry> | |
3195 | </variablelist> | |
3196 | </refsect1> | |
3197 | ||
19f86a63 YW |
3198 | <refsect1> |
3199 | <title>[HierarchyTokenBucketClass] Section Options</title> | |
3200 | <para>The <literal>[HierarchyTokenBucketClass]</literal> section manages the traffic control class of | |
3201 | hierarchy token bucket (htb).</para> | |
3202 | ||
3203 | <variablelist class='network-directives'> | |
f344a492 YW |
3204 | <xi:include href="tc.xml" xpointer="tclass-parent" /> |
3205 | <xi:include href="tc.xml" xpointer="tclass-classid" /> | |
19f86a63 YW |
3206 | |
3207 | <varlistentry> | |
3208 | <term><varname>Priority=</varname></term> | |
3209 | <listitem> | |
3210 | <para>Specifies the priority of the class. In the round-robin process, classes with the lowest | |
3211 | priority field are tried for packets first. This setting is mandatory.</para> | |
3212 | </listitem> | |
3213 | </varlistentry> | |
3214 | ||
3215 | <varlistentry> | |
3216 | <term><varname>Rate=</varname></term> | |
3217 | <listitem> | |
3218 | <para>Specifies the maximum rate this class and all its children are guaranteed. When suffixed | |
3219 | with K, M, or G, the specified size is parsed as Kilobits, Megabits, or Gigabits, respectively, | |
3220 | to the base of 1000. This setting is mandatory.</para> | |
3221 | </listitem> | |
3222 | </varlistentry> | |
3223 | ||
3224 | <varlistentry> | |
3225 | <term><varname>CeilRate=</varname></term> | |
3226 | <listitem> | |
3227 | <para>Specifies the maximum rate at which a class can send, if its parent has bandwidth to spare. | |
3228 | When suffixed with K, M, or G, the specified size is parsed as Kilobits, Megabits, or Gigabits, | |
3229 | respectively, to the base of 1000. When unset, the value specified with <varname>Rate=</varname> | |
3230 | is used.</para> | |
3231 | </listitem> | |
3232 | </varlistentry> | |
7f224020 SS |
3233 | </variablelist> |
3234 | </refsect1> | |
3235 | ||
3236 | <refsect1> | |
3237 | <title>[HeavyHitterFilter] Section Options</title> | |
3238 | <para>The <literal>[HeavyHitterFilter]</literal> section manages the queueing discipline | |
3239 | (qdisc) of Heavy Hitter Filter (hhf).</para> | |
3240 | ||
3241 | <variablelist class='network-directives'> | |
f344a492 YW |
3242 | <xi:include href="tc.xml" xpointer="qdisc-parent" /> |
3243 | <xi:include href="tc.xml" xpointer="qdisc-handle" /> | |
19f86a63 | 3244 | |
7f224020 SS |
3245 | <varlistentry> |
3246 | <term><varname>PacketLimit=</varname></term> | |
3247 | <listitem> | |
3248 | <para>Specifies the hard limit on the queue size in number of packets. When this limit is reached, incoming packets are | |
3249 | dropped. An unsigned integer ranges 0 to 4294967294. Defaults to unset and kernel's default is used.</para> | |
3250 | </listitem> | |
3251 | </varlistentry> | |
19f86a63 YW |
3252 | </variablelist> |
3253 | </refsect1> | |
3254 | ||
13b498f9 TJ |
3255 | <refsect1> |
3256 | <title>[BridgeVLAN] Section Options</title> | |
3257 | <para>The <literal>[BridgeVLAN]</literal> section manages the VLAN ID configuration of a bridge port and accepts | |
3258 | the following keys. Specify several <literal>[BridgeVLAN]</literal> sections to configure several VLAN entries. | |
3259 | The <varname>VLANFiltering=</varname> option has to be enabled, see <literal>[Bridge]</literal> section in | |
3260 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
3261 | ||
3262 | <variablelist class='network-directives'> | |
3263 | <varlistentry> | |
3264 | <term><varname>VLAN=</varname></term> | |
3265 | <listitem> | |
3266 | <para>The VLAN ID allowed on the port. This can be either a single ID or a range M-N. VLAN IDs are valid | |
3267 | from 1 to 4094.</para> | |
3268 | </listitem> | |
3269 | </varlistentry> | |
3270 | <varlistentry> | |
3271 | <term><varname>EgressUntagged=</varname></term> | |
3272 | <listitem> | |
3273 | <para>The VLAN ID specified here will be used to untag frames on egress. Configuring | |
3274 | <varname>EgressUntagged=</varname> implicates the use of <varname>VLAN=</varname> above and will enable the | |
3275 | VLAN ID for ingress as well. This can be either a single ID or a range M-N.</para> | |
3276 | </listitem> | |
3277 | </varlistentry> | |
3278 | <varlistentry> | |
3279 | <term><varname>PVID=</varname></term> | |
3280 | <listitem> | |
3281 | <para>The Port VLAN ID specified here is assigned to all untagged frames at ingress. | |
3282 | <varname>PVID=</varname> can be used only once. Configuring <varname>PVID=</varname> implicates the use of | |
3283 | <varname>VLAN=</varname> above and will enable the VLAN ID for ingress as well.</para> | |
3284 | </listitem> | |
3285 | </varlistentry> | |
3286 | </variablelist> | |
3287 | </refsect1> | |
798d3a52 ZJS |
3288 | |
3289 | <refsect1> | |
9e35b3de | 3290 | <title>Examples</title> |
798d3a52 | 3291 | <example> |
9e35b3de | 3292 | <title>Static network configuration</title> |
798d3a52 | 3293 | |
9e35b3de ZJS |
3294 | <programlisting># /etc/systemd/network/50-static.network |
3295 | [Match] | |
eac684ef TG |
3296 | Name=enp2s0 |
3297 | ||
3298 | [Network] | |
3299 | Address=192.168.0.15/24 | |
3300 | Gateway=192.168.0.1</programlisting> | |
9e35b3de ZJS |
3301 | |
3302 | <para>This brings interface <literal>enp2s0</literal> up with a static address. The | |
3303 | specified gateway will be used for a default route.</para> | |
798d3a52 | 3304 | </example> |
eac684ef | 3305 | |
798d3a52 | 3306 | <example> |
9e35b3de | 3307 | <title>DHCP on ethernet links</title> |
eac684ef | 3308 | |
9e35b3de ZJS |
3309 | <programlisting># /etc/systemd/network/80-dhcp.network |
3310 | [Match] | |
eac684ef TG |
3311 | Name=en* |
3312 | ||
3313 | [Network] | |
9c8ca3f7 | 3314 | DHCP=yes</programlisting> |
9e35b3de ZJS |
3315 | |
3316 | <para>This will enable DHCPv4 and DHCPv6 on all interfaces with names starting with | |
3317 | <literal>en</literal> (i.e. ethernet interfaces).</para> | |
798d3a52 | 3318 | </example> |
eac684ef | 3319 | |
4c94a4c2 | 3320 | <example> |
3321 | <title>IPv6 Prefix Delegation</title> | |
3322 | ||
3323 | <programlisting># /etc/systemd/network/55-ipv6-pd-upstream.network | |
3324 | [Match] | |
3325 | Name=enp1s0 | |
3326 | ||
3327 | [Network] | |
3328 | DHCP=ipv6</programlisting> | |
3329 | ||
3330 | <programlisting># /etc/systemd/network/56-ipv6-pd-downstream.network | |
3331 | [Match] | |
3332 | Name=enp2s0 | |
3333 | ||
3334 | [Network] | |
9efa8a3c SS |
3335 | IPv6PrefixDelegation=dhcpv6 |
3336 | ||
3337 | [DHCPv6] | |
3338 | AssignAcquiredDelegatedPrefixAddress=yes</programlisting> | |
4c94a4c2 | 3339 | |
3340 | <para>This will enable IPv6 PD on the interface enp1s0 as an upstream interface where the | |
3341 | DHCPv6 client is running and enp2s0 as a downstream interface where the prefix is delegated to.</para> | |
3342 | </example> | |
3343 | ||
798d3a52 | 3344 | <example> |
9e35b3de | 3345 | <title>A bridge with two enslaved links</title> |
f47c5c47 | 3346 | |
9e35b3de ZJS |
3347 | <programlisting># /etc/systemd/network/25-bridge-static.network |
3348 | [Match] | |
f47c5c47 | 3349 | Name=bridge0 |
3350 | ||
3351 | [Network] | |
3352 | Address=192.168.0.15/24 | |
3353 | Gateway=192.168.0.1 | |
3354 | DNS=192.168.0.1</programlisting> | |
f47c5c47 | 3355 | |
9e35b3de ZJS |
3356 | <programlisting># /etc/systemd/network/25-bridge-slave-interface-1.network |
3357 | [Match] | |
f47c5c47 | 3358 | Name=enp2s0 |
3359 | ||
3360 | [Network] | |
3361 | Bridge=bridge0</programlisting> | |
9e35b3de ZJS |
3362 | |
3363 | <programlisting># /etc/systemd/network/25-bridge-slave-interface-2.network | |
3364 | [Match] | |
3365 | Name=wlp3s0 | |
3366 | ||
3367 | [Network] | |
3368 | Bridge=bridge0</programlisting> | |
3369 | ||
3370 | <para>This creates a bridge and attaches devices <literal>enp2s0</literal> and | |
3371 | <literal>wlp3s0</literal> to it. The bridge will have the specified static address | |
3372 | and network assigned, and a default route via the specified gateway will be | |
3373 | added. The specified DNS server will be added to the global list of DNS resolvers. | |
3374 | </para> | |
13b498f9 | 3375 | </example> |
9e35b3de | 3376 | |
13b498f9 | 3377 | <example> |
9e35b3de | 3378 | <title></title> |
13b498f9 | 3379 | |
9e35b3de ZJS |
3380 | <programlisting> |
3381 | # /etc/systemd/network/20-bridge-slave-interface-vlan.network | |
3382 | [Match] | |
13b498f9 TJ |
3383 | Name=enp2s0 |
3384 | ||
3385 | [Network] | |
3386 | Bridge=bridge0 | |
3387 | ||
3388 | [BridgeVLAN] | |
3389 | VLAN=1-32 | |
3390 | PVID=42 | |
3391 | EgressUntagged=42 | |
3392 | ||
3393 | [BridgeVLAN] | |
3394 | VLAN=100-200 | |
3395 | ||
3396 | [BridgeVLAN] | |
3397 | EgressUntagged=300-400</programlisting> | |
0a8a0fad | 3398 | |
9e35b3de ZJS |
3399 | <para>This overrides the configuration specified in the previous example for the |
3400 | interface <literal>enp2s0</literal>, and enables VLAN on that bridge port. VLAN IDs | |
3401 | 1-32, 42, 100-400 will be allowed. Packets tagged with VLAN IDs 42, 300-400 will be | |
3402 | untagged when they leave on this interface. Untagged packets which arrive on this | |
3403 | interface will be assigned VLAN ID 42.</para> | |
798d3a52 | 3404 | </example> |
0a8a0fad | 3405 | |
798d3a52 | 3406 | <example> |
9e35b3de | 3407 | <title>Various tunnels</title> |
0a8a0fad | 3408 | |
9e35b3de ZJS |
3409 | <programlisting>/etc/systemd/network/25-tunnels.network |
3410 | [Match] | |
3411 | Name=ens1 | |
0a8a0fad TG |
3412 | |
3413 | [Network] | |
9e35b3de ZJS |
3414 | Tunnel=ipip-tun |
3415 | Tunnel=sit-tun | |
3416 | Tunnel=gre-tun | |
3417 | Tunnel=vti-tun | |
3418 | </programlisting> | |
3419 | ||
3420 | <programlisting>/etc/systemd/network/25-tunnel-ipip.netdev | |
3421 | [NetDev] | |
3422 | Name=ipip-tun | |
3423 | Kind=ipip | |
3424 | </programlisting> | |
3425 | ||
3426 | <programlisting>/etc/systemd/network/25-tunnel-sit.netdev | |
3427 | [NetDev] | |
3428 | Name=sit-tun | |
3429 | Kind=sit | |
3430 | </programlisting> | |
3431 | ||
3432 | <programlisting>/etc/systemd/network/25-tunnel-gre.netdev | |
3433 | [NetDev] | |
3434 | Name=gre-tun | |
3435 | Kind=gre | |
3436 | </programlisting> | |
3437 | ||
3438 | <programlisting>/etc/systemd/network/25-tunnel-vti.netdev | |
3439 | [NetDev] | |
3440 | Name=vti-tun | |
3441 | Kind=vti | |
3442 | </programlisting> | |
3443 | ||
3444 | <para>This will bring interface <literal>ens1</literal> up and create an IPIP tunnel, | |
3445 | a SIT tunnel, a GRE tunnel, and a VTI tunnel using it.</para> | |
798d3a52 | 3446 | </example> |
0a8a0fad | 3447 | |
798d3a52 | 3448 | <example> |
9e35b3de | 3449 | <title>A bond device</title> |
0a8a0fad | 3450 | |
9e35b3de ZJS |
3451 | <programlisting># /etc/systemd/network/30-bond1.network |
3452 | [Match] | |
3453 | Name=bond1 | |
0a8a0fad TG |
3454 | |
3455 | [Network] | |
9e35b3de ZJS |
3456 | DHCP=ipv6 |
3457 | </programlisting> | |
0a8a0fad | 3458 | |
9e35b3de ZJS |
3459 | <programlisting># /etc/systemd/network/30-bond1.netdev |
3460 | [NetDev] | |
3461 | Name=bond1 | |
3462 | Kind=bond | |
3463 | </programlisting> | |
0a8a0fad | 3464 | |
301a21a8 | 3465 | <programlisting># /etc/systemd/network/30-bond1-dev1.network |
9e35b3de ZJS |
3466 | [Match] |
3467 | MACAddress=52:54:00:e9:64:41 | |
0a8a0fad TG |
3468 | |
3469 | [Network] | |
9e35b3de ZJS |
3470 | Bond=bond1 |
3471 | </programlisting> | |
d94facdc | 3472 | |
301a21a8 | 3473 | <programlisting># /etc/systemd/network/30-bond1-dev2.network |
9e35b3de ZJS |
3474 | [Match] |
3475 | MACAddress=52:54:00:e9:64:42 | |
d94facdc MH |
3476 | |
3477 | [Network] | |
9e35b3de | 3478 | Bond=bond1 |
6cb955c6 | 3479 | </programlisting> |
9e35b3de ZJS |
3480 | |
3481 | <para>This will create a bond device <literal>bond1</literal> and enslave the two | |
3482 | devices with MAC addresses 52:54:00:e9:64:41 and 52:54:00:e9:64:42 to it. IPv6 DHCP | |
3483 | will be used to acquire an address.</para> | |
6cb955c6 AR |
3484 | </example> |
3485 | ||
3486 | <example> | |
9e35b3de ZJS |
3487 | <title>Virtual Routing and Forwarding (VRF)</title> |
3488 | <para>Add the <literal>bond1</literal> interface to the VRF master interface | |
3489 | <literal>vrf1</literal>. This will redirect routes generated on this interface to be | |
11d38b90 AR |
3490 | within the routing table defined during VRF creation. For kernels before 4.8 traffic |
3491 | won't be redirected towards the VRFs routing table unless specific ip-rules are added. | |
3492 | </para> | |
9e35b3de ZJS |
3493 | <programlisting># /etc/systemd/network/25-vrf.network |
3494 | [Match] | |
6cb955c6 AR |
3495 | Name=bond1 |
3496 | ||
3497 | [Network] | |
9e35b3de | 3498 | VRF=vrf1 |
d94facdc MH |
3499 | </programlisting> |
3500 | </example> | |
3501 | ||
42125eda SS |
3502 | <example> |
3503 | <title>MacVTap</title> | |
3504 | <para>This brings up a network interface <literal>macvtap-test</literal> | |
3505 | and attaches it to <literal>enp0s25</literal>.</para> | |
83ddf5d3 | 3506 | <programlisting># /usr/lib/systemd/network/25-macvtap.network |
42125eda SS |
3507 | [Match] |
3508 | Name=enp0s25 | |
3509 | ||
3510 | [Network] | |
3511 | MACVTAP=macvtap-test | |
3512 | </programlisting> | |
3513 | </example> | |
98d20a17 | 3514 | |
3515 | <example> | |
3516 | <title>A Xfrm interface with physical underlying device.</title> | |
3517 | ||
3518 | <programlisting># /etc/systemd/network/27-xfrm.netdev | |
3519 | [NetDev] | |
3520 | Name=xfrm0 | |
3521 | ||
3522 | [Xfrm] | |
3523 | InterfaceId=7</programlisting> | |
3524 | ||
3525 | <programlisting># /etc/systemd/network/27-eth0.network | |
3526 | [Match] | |
3527 | Name=eth0 | |
3528 | ||
3529 | [Network] | |
3530 | Xfrm=xfrm0</programlisting> | |
3531 | ||
3532 | <para>This creates a <literal>xfrm0</literal> interface and binds it to the <literal>eth0</literal> device. | |
3533 | This allows hardware based ipsec offloading to the <literal>eth0</literal> nic. | |
3534 | If offloading is not needed, xfrm interfaces can be assigned to the <literal>lo</literal> device. | |
3535 | </para> | |
3536 | </example> | |
798d3a52 ZJS |
3537 | </refsect1> |
3538 | ||
3539 | <refsect1> | |
3540 | <title>See Also</title> | |
3541 | <para> | |
3542 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
f41b446a | 3543 | <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
798d3a52 | 3544 | <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
aaa297d4 LP |
3545 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
3546 | <citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
798d3a52 ZJS |
3547 | </para> |
3548 | </refsect1> | |
eac684ef TG |
3549 | |
3550 | </refentry> |