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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"> |
db9ecf05 | 4 | <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> |
1ff28eae TG |
5 | |
6 | <refentry id="systemd.link"> | |
798d3a52 ZJS |
7 | <refentryinfo> |
8 | <title>systemd.link</title> | |
9 | <productname>systemd</productname> | |
798d3a52 | 10 | </refentryinfo> |
1ff28eae | 11 | |
798d3a52 ZJS |
12 | <refmeta> |
13 | <refentrytitle>systemd.link</refentrytitle> | |
14 | <manvolnum>5</manvolnum> | |
15 | </refmeta> | |
1ff28eae | 16 | |
798d3a52 ZJS |
17 | <refnamediv> |
18 | <refname>systemd.link</refname> | |
19 | <refpurpose>Network device configuration</refpurpose> | |
20 | </refnamediv> | |
1ff28eae | 21 | |
798d3a52 ZJS |
22 | <refsynopsisdiv> |
23 | <para><filename><replaceable>link</replaceable>.link</filename></para> | |
24 | </refsynopsisdiv> | |
1ff28eae | 25 | |
798d3a52 ZJS |
26 | <refsect1> |
27 | <title>Description</title> | |
1ff28eae | 28 | |
d4de2b2a | 29 | <para>A plain ini-style text file that encodes configuration for matching network devices, used by |
55cf7779 | 30 | <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry> and in |
d4de2b2a | 31 | particular its <command>net_setup_link</command> builtin. See |
675fa6ea | 32 | <citerefentry><refentrytitle>systemd.syntax</refentrytitle><manvolnum>7</manvolnum></citerefentry> for a |
d4de2b2a | 33 | general description of the syntax.</para> |
1ff28eae | 34 | |
e406e8a2 YW |
35 | <para>The link files are read from the files located in the system network directory |
36 | <filename>/usr/lib/systemd/network</filename>, the volatile runtime network directory | |
37 | <filename>/run/systemd/network</filename>, and the local administration network directory | |
38 | <filename>/etc/systemd/network</filename>. Link files must have the extension | |
39 | <filename>.link</filename>; other extensions are ignored. All link files are collectively sorted | |
40 | and processed in lexical order, regardless of the directories in which they live. However, files | |
41 | with identical filenames replace each other. Files in <filename>/etc/</filename> have the highest | |
42 | priority, files in <filename>/run/</filename> take precedence over files with the same name in | |
43 | <filename>/usr/lib/</filename>. This can be used to override a system-supplied link file with a | |
44 | local file if needed. As a special case, an empty file (file size 0) or symlink with the same name | |
45 | pointing to <filename>/dev/null</filename> disables the configuration file entirely (it is | |
46 | "masked").</para> | |
47 | ||
48 | <para>Along with the link file <filename>foo.link</filename>, a "drop-in" directory | |
49 | <filename>foo.link.d/</filename> may exist. All files with the suffix <literal>.conf</literal> | |
e6655fbe YW |
50 | from this directory will be merged in the alphanumeric order and parsed after the main file itself |
51 | has been parsed. This is useful to alter or add configuration settings, without having to modify | |
52 | the main configuration file. Each drop-in file must have appropriate section headers.</para> | |
e406e8a2 YW |
53 | |
54 | <para>In addition to <filename>/etc/systemd/network</filename>, drop-in <literal>.d</literal> | |
55 | directories can be placed in <filename>/usr/lib/systemd/network</filename> or | |
56 | <filename>/run/systemd/network</filename> directories. Drop-in files in <filename>/etc/</filename> | |
57 | take precedence over those in <filename>/run/</filename> which in turn take precedence over those | |
58 | in <filename>/usr/lib/</filename>. Drop-in files under any of these directories take precedence | |
59 | over the main link file wherever located.</para> | |
1ff28eae | 60 | |
d7dce7b6 ZJS |
61 | <para>The link file contains a [Match] section, which determines if a given link file may be applied to a |
62 | given device, as well as a [Link] section specifying how the device should be configured. The first (in | |
63 | lexical order) of the link files that matches a given device is applied. Note that a default file | |
64 | <filename>99-default.link</filename> is shipped by the system. Any user-supplied | |
65 | <filename>.link</filename> should hence have a lexically earlier name to be considered at all.</para> | |
66 | ||
67 | <para>See <citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry> for | |
68 | diagnosing problems with <filename>.link</filename> files.</para> | |
798d3a52 | 69 | </refsect1> |
102bd40e | 70 | |
798d3a52 ZJS |
71 | <refsect1> |
72 | <title>[Match] Section Options</title> | |
1ff28eae | 73 | |
84ea567e | 74 | <para>A link file is said to match a device if all matches specified by the |
bdac5608 ZJS |
75 | [Match] section are satisfied. When a link file does not contain valid settings |
76 | in [Match] section, then the file will match all devices and | |
84ea567e YW |
77 | <command>systemd-udevd</command> warns about that. Hint: to avoid the warning and to make it clear |
78 | that all interfaces shall be matched, add the following: | |
79 | <programlisting>OriginalName=*</programlisting> | |
80 | The following keys are accepted:</para> | |
1ff28eae | 81 | |
798d3a52 | 82 | <variablelist class='network-directives'> |
d9b20454 ZJS |
83 | <!-- This list is reused in systemd.network(3), hence maintain a specific order: |
84 | 1. device matches shared between the two lists | |
85 | 2. non-shared settings | |
86 | 3. host matches shared between the two lists | |
87 | --> | |
88 | ||
89 | <varlistentry id='mac-address'> | |
798d3a52 ZJS |
90 | <term><varname>MACAddress=</varname></term> |
91 | <listitem> | |
9310bf4b YW |
92 | <para>A whitespace-separated list of hardware addresses. Use full colon-, hyphen- or dot-delimited hexadecimal. See the example below. |
93 | This option may appear more than once, in which case the lists are merged. If the empty string is assigned to this option, the list | |
94 | of hardware addresses defined prior to this is reset.</para> | |
95 | ||
96 | <para>Example: | |
97 | <programlisting>MACAddress=01:23:45:67:89:ab 00-11-22-33-44-55 AABB.CCDD.EEFF</programlisting></para> | |
798d3a52 ZJS |
98 | </listitem> |
99 | </varlistentry> | |
d9b20454 ZJS |
100 | |
101 | <varlistentry id='permanent-mac-address'> | |
4bb7cc82 YW |
102 | <term><varname>PermanentMACAddress=</varname></term> |
103 | <listitem> | |
104 | <para>A whitespace-separated list of hardware's permanent addresses. While | |
105 | <varname>MACAddress=</varname> matches the device's current MAC address, this matches the | |
106 | device's permanent MAC address, which may be different from the current one. Use full | |
107 | colon-, hyphen- or dot-delimited hexadecimal. This option may appear more than once, in | |
108 | which case the lists are merged. If the empty string is assigned to this option, the list | |
109 | of hardware addresses defined prior to this is reset.</para> | |
110 | </listitem> | |
111 | </varlistentry> | |
d9b20454 ZJS |
112 | |
113 | <varlistentry id='path'> | |
798d3a52 ZJS |
114 | <term><varname>Path=</varname></term> |
115 | <listitem> | |
5256e00e TG |
116 | <para>A whitespace-separated list of shell-style globs matching |
117 | the persistent path, as exposed by the udev property | |
d7dce7b6 | 118 | <varname>ID_PATH</varname>.</para> |
798d3a52 ZJS |
119 | </listitem> |
120 | </varlistentry> | |
d9b20454 ZJS |
121 | |
122 | <varlistentry id='driver'> | |
798d3a52 ZJS |
123 | <term><varname>Driver=</varname></term> |
124 | <listitem> | |
d7dce7b6 | 125 | <para>A whitespace-separated list of shell-style globs matching the driver currently bound to the |
d9b20454 ZJS |
126 | device, as exposed by the udev property <varname>ID_NET_DRIVER</varname> of its parent device, or |
127 | if that is not set, the driver as exposed by <command>ethtool -i</command> of the device itself. | |
128 | If the list is prefixed with a "!", the test is inverted.</para> | |
798d3a52 ZJS |
129 | </listitem> |
130 | </varlistentry> | |
d9b20454 ZJS |
131 | |
132 | <varlistentry id='type'> | |
798d3a52 ZJS |
133 | <term><varname>Type=</varname></term> |
134 | <listitem> | |
ef62949a | 135 | <para>A whitespace-separated list of shell-style globs matching the device type, as exposed by |
2480ca95 LM |
136 | <command>networkctl list</command>. If the list is prefixed with a "!", the test is inverted. |
137 | Some valid values are <literal>ether</literal>, <literal>loopback</literal>, <literal>wlan</literal>, <literal>wwan</literal>. | |
138 | Valid types are named either from the udev <literal>DEVTYPE</literal> attribute, or | |
139 | <literal>ARPHRD_</literal> macros in <filename>linux/if_arp.h</filename>, so this is not comprehensive. | |
ef62949a | 140 | </para> |
798d3a52 ZJS |
141 | </listitem> |
142 | </varlistentry> | |
d9b20454 ZJS |
143 | |
144 | <varlistentry id='property'> | |
44005bfb YW |
145 | <term><varname>Property=</varname></term> |
146 | <listitem> | |
387f6955 | 147 | <para>A whitespace-separated list of udev property names with their values after equals sign |
44005bfb YW |
148 | (<literal>=</literal>). If multiple properties are specified, the test results are ANDed. |
149 | If the list is prefixed with a "!", the test is inverted. If a value contains white | |
150 | spaces, then please quote whole key and value pair. If a value contains quotation, then | |
151 | please escape the quotation with <literal>\</literal>.</para> | |
152 | ||
153 | <para>Example: if a .link file has the following: | |
154 | <programlisting>Property=ID_MODEL_ID=9999 "ID_VENDOR_FROM_DATABASE=vendor name" "KEY=with \"quotation\""</programlisting> | |
155 | then, the .link file matches only when an interface has all the above three properties. | |
156 | </para> | |
157 | </listitem> | |
158 | </varlistentry> | |
d9b20454 | 159 | |
798d3a52 | 160 | <varlistentry> |
d9b20454 ZJS |
161 | <term><varname>OriginalName=</varname></term> |
162 | <listitem> | |
163 | <para>A whitespace-separated list of shell-style globs matching the device name, as exposed by the | |
164 | udev property "INTERFACE". This cannot be used to match on names that have already been changed | |
165 | from userspace. Caution is advised when matching on kernel-assigned names, as they are known to be | |
166 | unstable between reboots.</para> | |
167 | </listitem> | |
168 | </varlistentry> | |
169 | ||
170 | <varlistentry id='host'> | |
798d3a52 ZJS |
171 | <term><varname>Host=</varname></term> |
172 | <listitem> | |
d689bbca | 173 | <para>Matches against the hostname or machine ID of the host. See <varname>ConditionHost=</varname> in |
798d3a52 | 174 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
d689bbca YW |
175 | for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated. |
176 | If an empty string is assigned, then previously assigned value is cleared. | |
177 | </para> | |
798d3a52 ZJS |
178 | </listitem> |
179 | </varlistentry> | |
d9b20454 ZJS |
180 | |
181 | <varlistentry id='virtualization'> | |
798d3a52 ZJS |
182 | <term><varname>Virtualization=</varname></term> |
183 | <listitem> | |
d689bbca YW |
184 | <para>Checks whether the system is executed in a virtualized environment and optionally test |
185 | whether it is a specific implementation. See <varname>ConditionVirtualization=</varname> in | |
798d3a52 | 186 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
d689bbca YW |
187 | for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated. |
188 | If an empty string is assigned, then previously assigned value is cleared. | |
189 | </para> | |
798d3a52 ZJS |
190 | </listitem> |
191 | </varlistentry> | |
d9b20454 ZJS |
192 | |
193 | <varlistentry id='kernel-command-line'> | |
798d3a52 ZJS |
194 | <term><varname>KernelCommandLine=</varname></term> |
195 | <listitem> | |
d689bbca | 196 | <para>Checks whether a specific kernel command line option is set. See |
d7dce7b6 | 197 | <varname>ConditionKernelCommandLine=</varname> in |
798d3a52 | 198 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
d689bbca YW |
199 | for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated. |
200 | If an empty string is assigned, then previously assigned value is cleared. | |
201 | </para> | |
202 | </listitem> | |
203 | </varlistentry> | |
d9b20454 ZJS |
204 | |
205 | <varlistentry id='kernel-version'> | |
d689bbca YW |
206 | <term><varname>KernelVersion=</varname></term> |
207 | <listitem> | |
208 | <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a certain | |
209 | expression. See <varname>ConditionKernelVersion=</varname> in | |
210 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> for | |
211 | details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated. | |
212 | If an empty string is assigned, then previously assigned value is cleared. | |
213 | </para> | |
798d3a52 ZJS |
214 | </listitem> |
215 | </varlistentry> | |
d9b20454 ZJS |
216 | |
217 | <varlistentry id='architecture'> | |
798d3a52 ZJS |
218 | <term><varname>Architecture=</varname></term> |
219 | <listitem> | |
d689bbca YW |
220 | <para>Checks whether the system is running on a specific architecture. See |
221 | <varname>ConditionArchitecture=</varname> in | |
798d3a52 | 222 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> |
d689bbca YW |
223 | for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated. |
224 | If an empty string is assigned, then previously assigned value is cleared. | |
225 | </para> | |
798d3a52 | 226 | </listitem> |
cbcdcaaa UKK |
227 | </varlistentry> |
228 | ||
229 | <varlistentry id='firmware'> | |
230 | <term><varname>Firmware=</varname></term> | |
231 | <listitem> | |
232 | <para>Checks whether the system is running on a machine with the specified firmware. See | |
233 | <varname>ConditionFirmware=</varname> in | |
234 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
235 | for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated. | |
236 | If an empty string is assigned, then previously assigned value is cleared. | |
237 | </para> | |
238 | </listitem> | |
798d3a52 ZJS |
239 | </varlistentry> |
240 | </variablelist> | |
1ff28eae | 241 | |
798d3a52 | 242 | </refsect1> |
102bd40e | 243 | |
798d3a52 ZJS |
244 | <refsect1> |
245 | <title>[Link] Section Options</title> | |
102bd40e | 246 | |
d7dce7b6 | 247 | <para>The [Link] section accepts the following |
798d3a52 | 248 | keys:</para> |
1ff28eae | 249 | |
798d3a52 ZJS |
250 | <variablelist class='network-directives'> |
251 | <varlistentry> | |
252 | <term><varname>Description=</varname></term> | |
253 | <listitem> | |
254 | <para>A description of the device.</para> | |
255 | </listitem> | |
256 | </varlistentry> | |
257 | <varlistentry> | |
258 | <term><varname>Alias=</varname></term> | |
259 | <listitem> | |
d7dce7b6 | 260 | <para>The <varname>ifalias</varname> interface property is set to this value.</para> |
798d3a52 ZJS |
261 | </listitem> |
262 | </varlistentry> | |
263 | <varlistentry> | |
264 | <term><varname>MACAddressPolicy=</varname></term> | |
265 | <listitem> | |
266 | <para>The policy by which the MAC address should be set. The | |
267 | available policies are: | |
268 | </para> | |
1ff28eae | 269 | |
798d3a52 ZJS |
270 | <variablelist> |
271 | <varlistentry> | |
d7dce7b6 | 272 | <term><option>persistent</option></term> |
798d3a52 ZJS |
273 | <listitem> |
274 | <para>If the hardware has a persistent MAC address, as | |
275 | most hardware should, and if it is used by the kernel, | |
276 | nothing is done. Otherwise, a new MAC address is | |
277 | generated which is guaranteed to be the same on every | |
278 | boot for the given machine and the given device, but | |
1c25683e | 279 | which is otherwise random. This feature depends on ID_NET_NAME_* |
a8eaaee7 | 280 | properties to exist for the link. On hardware where these |
b938cb90 | 281 | properties are not set, the generation of a persistent MAC address |
1c25683e | 282 | will fail.</para> |
798d3a52 ZJS |
283 | </listitem> |
284 | </varlistentry> | |
285 | <varlistentry> | |
d7dce7b6 | 286 | <term><option>random</option></term> |
798d3a52 ZJS |
287 | <listitem> |
288 | <para>If the kernel is using a random MAC address, | |
289 | nothing is done. Otherwise, a new address is randomly | |
290 | generated each time the device appears, typically at | |
b938cb90 | 291 | boot. Either way, the random address will have the |
2e229e0c TG |
292 | <literal>unicast</literal> and |
293 | <literal>locally administered</literal> bits set.</para> | |
798d3a52 ZJS |
294 | </listitem> |
295 | </varlistentry> | |
66d3752e | 296 | <varlistentry> |
d7dce7b6 | 297 | <term><option>none</option></term> |
66d3752e | 298 | <listitem> |
6ca4a070 YW |
299 | <para>Keeps the MAC address assigned by the kernel. Or use the MAC address specified in |
300 | <varname>MACAddress=</varname>.</para> | |
66d3752e JK |
301 | </listitem> |
302 | </varlistentry> | |
798d3a52 | 303 | </variablelist> |
6ca4a070 YW |
304 | |
305 | <para>An empty string assignment is equivalent to setting <literal>none</literal>.</para> | |
798d3a52 ZJS |
306 | </listitem> |
307 | </varlistentry> | |
308 | <varlistentry> | |
309 | <term><varname>MACAddress=</varname></term> | |
310 | <listitem> | |
6ca4a070 YW |
311 | <para>The interface MAC address to use. For this setting to take effect, |
312 | <varname>MACAddressPolicy=</varname> must either be unset, empty, or <literal>none</literal>. | |
313 | </para> | |
798d3a52 ZJS |
314 | </listitem> |
315 | </varlistentry> | |
316 | <varlistentry> | |
317 | <term><varname>NamePolicy=</varname></term> | |
318 | <listitem> | |
3907446f | 319 | <para>An ordered, space-separated list of policies by which the interface name should be set. |
d7dce7b6 | 320 | <varname>NamePolicy=</varname> may be disabled by specifying <option>net.ifnames=0</option> on the |
58576937 | 321 | kernel command line. Each of the policies may fail, and the first successful one is used. The name |
d7dce7b6 | 322 | is not set directly, but is exported to udev as the property <option>ID_NET_NAME</option>, which |
58576937 ZJS |
323 | is, by default, used by a |
324 | <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
325 | rule to set <varname>NAME</varname>. The available policies are: | |
3907446f | 326 | </para> |
1ff28eae | 327 | |
798d3a52 ZJS |
328 | <variablelist> |
329 | <varlistentry> | |
d7dce7b6 | 330 | <term><option>kernel</option></term> |
798d3a52 ZJS |
331 | <listitem> |
332 | <para>If the kernel claims that the name it has set | |
333 | for a device is predictable, then no renaming is | |
334 | performed.</para> | |
335 | </listitem> | |
336 | </varlistentry> | |
337 | <varlistentry> | |
d7dce7b6 | 338 | <term><option>database</option></term> |
798d3a52 ZJS |
339 | <listitem> |
340 | <para>The name is set based on entries in the udev's | |
341 | Hardware Database with the key | |
d7dce7b6 | 342 | <varname>ID_NET_NAME_FROM_DATABASE</varname>. |
798d3a52 ZJS |
343 | </para> |
344 | </listitem> | |
345 | </varlistentry> | |
346 | <varlistentry> | |
d7dce7b6 | 347 | <term><option>onboard</option></term> |
798d3a52 ZJS |
348 | <listitem> |
349 | <para>The name is set based on information given by | |
350 | the firmware for on-board devices, as exported by the | |
d7dce7b6 | 351 | udev property <varname>ID_NET_NAME_ONBOARD</varname>. |
0b1e5b6e | 352 | See <citerefentry><refentrytitle>systemd.net-naming-scheme</refentrytitle><manvolnum>7</manvolnum></citerefentry>. |
798d3a52 ZJS |
353 | </para> |
354 | </listitem> | |
355 | </varlistentry> | |
356 | <varlistentry> | |
d7dce7b6 | 357 | <term><option>slot</option></term> |
798d3a52 ZJS |
358 | <listitem> |
359 | <para>The name is set based on information given by | |
360 | the firmware for hot-plug devices, as exported by the | |
d7dce7b6 | 361 | udev property <varname>ID_NET_NAME_SLOT</varname>. |
0b1e5b6e | 362 | See <citerefentry><refentrytitle>systemd.net-naming-scheme</refentrytitle><manvolnum>7</manvolnum></citerefentry>. |
798d3a52 ZJS |
363 | </para> |
364 | </listitem> | |
365 | </varlistentry> | |
366 | <varlistentry> | |
d7dce7b6 | 367 | <term><option>path</option></term> |
798d3a52 ZJS |
368 | <listitem> |
369 | <para>The name is set based on the device's physical | |
370 | location, as exported by the udev property | |
0b1e5b6e ZJS |
371 | <varname>ID_NET_NAME_PATH</varname>. |
372 | See <citerefentry><refentrytitle>systemd.net-naming-scheme</refentrytitle><manvolnum>7</manvolnum></citerefentry>. | |
373 | </para> | |
798d3a52 ZJS |
374 | </listitem> |
375 | </varlistentry> | |
376 | <varlistentry> | |
d7dce7b6 | 377 | <term><option>mac</option></term> |
798d3a52 ZJS |
378 | <listitem> |
379 | <para>The name is set based on the device's persistent | |
380 | MAC address, as exported by the udev property | |
0b1e5b6e ZJS |
381 | <varname>ID_NET_NAME_MAC</varname>. |
382 | See <citerefentry><refentrytitle>systemd.net-naming-scheme</refentrytitle><manvolnum>7</manvolnum></citerefentry>. | |
383 | </para> | |
798d3a52 ZJS |
384 | </listitem> |
385 | </varlistentry> | |
3907446f | 386 | <varlistentry> |
d7dce7b6 | 387 | <term><option>keep</option></term> |
3907446f ZJS |
388 | <listitem> |
389 | <para>If the device already had a name given by userspace (as part of creation of the device | |
390 | or a rename), keep it.</para> | |
798d3a52 ZJS |
391 | </listitem> |
392 | </varlistentry> | |
393 | </variablelist> | |
394 | </listitem> | |
395 | </varlistentry> | |
396 | <varlistentry> | |
397 | <term><varname>Name=</varname></term> | |
398 | <listitem> | |
58576937 ZJS |
399 | <para>The interface name to use. This option has lower precedence than |
400 | <varname>NamePolicy=</varname>, so for this setting to take effect, <varname>NamePolicy=</varname> | |
401 | must either be unset, empty, disabled, or all policies configured there must fail. Also see the | |
402 | example below with <literal>Name=dmz0</literal>.</para> | |
1b934761 ZJS |
403 | |
404 | <para>Note that specifying a name that the kernel might use for another | |
405 | interface (for example <literal>eth0</literal>) is dangerous because the | |
406 | name assignment done by udev will race with the assignment done by the | |
407 | kernel, and only one interface may use the name. Depending on the order of | |
408 | operations, either udev or the kernel will win, making the naming | |
409 | unpredictable. It is best to use some different prefix, for example | |
410 | <literal>internal0</literal>/<literal>external0</literal> or | |
411 | <literal>lan0</literal>/<literal>lan1</literal>/<literal>lan3</literal>. | |
412 | </para> | |
798d3a52 ZJS |
413 | </listitem> |
414 | </varlistentry> | |
ef1d2c07 YW |
415 | <varlistentry> |
416 | <term><varname>AlternativeNamesPolicy=</varname></term> | |
417 | <listitem> | |
418 | <para>A space-separated list of policies by which the interface's alternative names | |
419 | should be set. Each of the policies may fail, and all successful policies are used. The | |
420 | available policies are <literal>database</literal>, <literal>onboard</literal>, | |
421 | <literal>slot</literal>, <literal>path</literal>, and <literal>mac</literal>. If the | |
422 | kernel does not support the alternative names, then this setting will be ignored. | |
423 | </para> | |
424 | </listitem> | |
425 | </varlistentry> | |
a5053a15 YW |
426 | <varlistentry> |
427 | <term><varname>AlternativeName=</varname></term> | |
428 | <listitem> | |
429 | <para>The alternative interface name to use. This option can be specified multiple times. | |
430 | If the empty string is assigned to this option, the list is reset, and all prior assignments | |
bb181dd4 YW |
431 | have no effect. If the kernel does not support the alternative names, then this setting will |
432 | be ignored.</para> | |
a5053a15 YW |
433 | </listitem> |
434 | </varlistentry> | |
face9fcc YW |
435 | <varlistentry> |
436 | <term><varname>TransmitQueues=</varname></term> | |
437 | <listitem> | |
438 | <para>Specifies the device's number of transmit queues. An integer in the range 1…4096. | |
439 | When unset, the kernel's default will be used.</para> | |
440 | </listitem> | |
441 | </varlistentry> | |
442 | <varlistentry> | |
443 | <term><varname>ReceiveQueues=</varname></term> | |
444 | <listitem> | |
445 | <para>Specifies the device's number of receive queues. An integer in the range 1…4096. | |
446 | When unset, the kernel's default will be used.</para> | |
447 | </listitem> | |
448 | </varlistentry> | |
ef4a91a7 | 449 | <varlistentry> |
1f8dc96c | 450 | <term><varname>TransmitQueueLength=</varname></term> |
ef4a91a7 UÖ |
451 | <listitem> |
452 | <para>Specifies the transmit queue length of the device in number of packets. An unsigned integer | |
1d3a473b | 453 | in the range 0…4294967294. When unset, the kernel's default will be used.</para> |
ef4a91a7 UÖ |
454 | </listitem> |
455 | </varlistentry> | |
798d3a52 ZJS |
456 | <varlistentry> |
457 | <term><varname>MTUBytes=</varname></term> | |
458 | <listitem> | |
459 | <para>The maximum transmission unit in bytes to set for the | |
be0d27ee | 460 | device. The usual suffixes K, M, G are supported and are |
798d3a52 ZJS |
461 | understood to the base of 1024.</para> |
462 | </listitem> | |
463 | </varlistentry> | |
464 | <varlistentry> | |
465 | <term><varname>BitsPerSecond=</varname></term> | |
466 | <listitem> | |
467 | <para>The speed to set for the device, the value is rounded | |
be0d27ee | 468 | down to the nearest Mbps. The usual suffixes K, M, G are |
798d3a52 ZJS |
469 | supported and are understood to the base of 1000.</para> |
470 | </listitem> | |
471 | </varlistentry> | |
472 | <varlistentry> | |
473 | <term><varname>Duplex=</varname></term> | |
474 | <listitem> | |
d7dce7b6 ZJS |
475 | <para>The duplex mode to set for the device. The accepted values are <option>half</option> and |
476 | <option>full</option>.</para> | |
798d3a52 ZJS |
477 | </listitem> |
478 | </varlistentry> | |
a39f92d3 SS |
479 | <varlistentry> |
480 | <term><varname>AutoNegotiation=</varname></term> | |
481 | <listitem> | |
9b6ffef3 | 482 | <para>Takes a boolean. If set to yes, automatic negotiation of transmission parameters is enabled. |
a39f92d3 SS |
483 | Autonegotiation is a procedure by which two connected ethernet devices choose |
484 | common transmission parameters, such as speed, duplex mode, and flow control. | |
9b6ffef3 | 485 | When unset, the kernel's default will be used.</para> |
a39f92d3 | 486 | |
a0e1ad10 | 487 | <para>Note that if autonegotiation is enabled, speed and duplex settings are |
11fcfc53 | 488 | read-only. If autonegotiation is disabled, speed and duplex settings are writable |
a39f92d3 SS |
489 | if the driver supports multiple link modes.</para> |
490 | </listitem> | |
491 | </varlistentry> | |
798d3a52 ZJS |
492 | <varlistentry> |
493 | <term><varname>WakeOnLan=</varname></term> | |
494 | <listitem> | |
c50404ae YW |
495 | <para>The Wake-on-LAN policy to set for the device. Takes the special value |
496 | <literal>off</literal> which disables Wake-on-LAN, or space separated list of the following | |
497 | words:</para> | |
1ff28eae | 498 | |
798d3a52 ZJS |
499 | <variablelist> |
500 | <varlistentry> | |
d7dce7b6 | 501 | <term><option>phy</option></term> |
798d3a52 ZJS |
502 | <listitem> |
503 | <para>Wake on PHY activity.</para> | |
504 | </listitem> | |
505 | </varlistentry> | |
617da14c | 506 | <varlistentry> |
d7dce7b6 | 507 | <term><option>unicast</option></term> |
617da14c SS |
508 | <listitem> |
509 | <para>Wake on unicast messages.</para> | |
510 | </listitem> | |
511 | </varlistentry> | |
512 | <varlistentry> | |
d7dce7b6 | 513 | <term><option>multicast</option></term> |
617da14c SS |
514 | <listitem> |
515 | <para>Wake on multicast messages.</para> | |
516 | </listitem> | |
517 | </varlistentry> | |
518 | <varlistentry> | |
d7dce7b6 | 519 | <term><option>broadcast</option></term> |
617da14c SS |
520 | <listitem> |
521 | <para>Wake on broadcast messages.</para> | |
522 | </listitem> | |
523 | </varlistentry> | |
524 | <varlistentry> | |
d7dce7b6 | 525 | <term><option>arp</option></term> |
617da14c SS |
526 | <listitem> |
527 | <para>Wake on ARP.</para> | |
528 | </listitem> | |
529 | </varlistentry> | |
798d3a52 | 530 | <varlistentry> |
d7dce7b6 | 531 | <term><option>magic</option></term> |
798d3a52 ZJS |
532 | <listitem> |
533 | <para>Wake on receipt of a magic packet. | |
534 | </para> | |
535 | </listitem> | |
536 | </varlistentry> | |
617da14c | 537 | <varlistentry> |
d7dce7b6 | 538 | <term><option>secureon</option></term> |
617da14c SS |
539 | <listitem> |
540 | <para>Enable secureon(tm) password for MagicPacket(tm). | |
541 | </para> | |
542 | </listitem> | |
543 | </varlistentry> | |
798d3a52 | 544 | </variablelist> |
c605bd00 | 545 | |
c50404ae YW |
546 | <para>Defaults to unset, and the device's default will be used. This setting can be specified |
547 | multiple times. If an empty string is assigned, then the all previous assignments are | |
548 | cleared.</para> | |
798d3a52 ZJS |
549 | </listitem> |
550 | </varlistentry> | |
593022fa SS |
551 | <varlistentry> |
552 | <term><varname>Port=</varname></term> | |
553 | <listitem> | |
554 | <para>The port option is used to select the device port. The | |
555 | supported values are:</para> | |
556 | ||
557 | <variablelist> | |
558 | <varlistentry> | |
d7dce7b6 | 559 | <term><option>tp</option></term> |
593022fa SS |
560 | <listitem> |
561 | <para>An Ethernet interface using Twisted-Pair cable as the medium.</para> | |
562 | </listitem> | |
563 | </varlistentry> | |
564 | <varlistentry> | |
d7dce7b6 | 565 | <term><option>aui</option></term> |
593022fa SS |
566 | <listitem> |
567 | <para>Attachment Unit Interface (AUI). Normally used with hubs. | |
568 | </para> | |
569 | </listitem> | |
570 | </varlistentry> | |
571 | <varlistentry> | |
d7dce7b6 | 572 | <term><option>bnc</option></term> |
593022fa SS |
573 | <listitem> |
574 | <para>An Ethernet interface using BNC connectors and co-axial cable.</para> | |
575 | </listitem> | |
576 | </varlistentry> | |
577 | <varlistentry> | |
d7dce7b6 | 578 | <term><option>mii</option></term> |
593022fa SS |
579 | <listitem> |
580 | <para>An Ethernet interface using a Media Independent Interface (MII).</para> | |
581 | </listitem> | |
582 | </varlistentry> | |
583 | <varlistentry> | |
d7dce7b6 | 584 | <term><option>fibre</option></term> |
593022fa SS |
585 | <listitem> |
586 | <para>An Ethernet interface using Optical Fibre as the medium.</para> | |
587 | </listitem> | |
588 | </varlistentry> | |
589 | </variablelist> | |
590 | </listitem> | |
591 | </varlistentry> | |
6cf0a204 SS |
592 | <varlistentry> |
593 | <term><varname>Advertise=</varname></term> | |
594 | <listitem> | |
595 | <para>This sets what speeds and duplex modes of operation are advertised for auto-negotiation. | |
a0e1ad10 | 596 | This implies <literal>AutoNegotiation=yes</literal>. The supported values are: |
6cf0a204 SS |
597 | |
598 | <table> | |
599 | <title>Supported advertise values</title> | |
600 | <tgroup cols='3'> | |
601 | <colspec colname='Advertise' /> | |
602 | <colspec colname='Speed' /> | |
603 | <colspec colname='Duplex Mode' /> | |
604 | ||
605 | <thead><row> | |
606 | <entry>Advertise</entry> | |
607 | <entry>Speed (Mbps)</entry> | |
608 | <entry>Duplex Mode</entry> | |
609 | </row></thead> | |
610 | <tbody> | |
d7dce7b6 | 611 | <row><entry><option>10baset-half</option></entry> |
6cf0a204 SS |
612 | <entry>10</entry><entry>half</entry></row> |
613 | ||
d7dce7b6 | 614 | <row><entry><option>10baset-full</option></entry> |
6cf0a204 SS |
615 | <entry>10</entry><entry>full</entry></row> |
616 | ||
d7dce7b6 | 617 | <row><entry><option>100baset-half</option></entry> |
6cf0a204 SS |
618 | <entry>100</entry><entry>half</entry></row> |
619 | ||
d7dce7b6 | 620 | <row><entry><option>100baset-full</option></entry> |
6cf0a204 SS |
621 | <entry>100</entry><entry>full</entry></row> |
622 | ||
d7dce7b6 | 623 | <row><entry><option>1000baset-half</option></entry> |
6cf0a204 SS |
624 | <entry>1000</entry><entry>half</entry></row> |
625 | ||
d7dce7b6 | 626 | <row><entry><option>1000baset-full</option></entry> |
6cf0a204 SS |
627 | <entry>1000</entry><entry>full</entry></row> |
628 | ||
d7dce7b6 | 629 | <row><entry><option>10000baset-full</option></entry> |
6cf0a204 SS |
630 | <entry>10000</entry><entry>full</entry></row> |
631 | ||
d7dce7b6 | 632 | <row><entry><option>2500basex-full</option></entry> |
6cf0a204 SS |
633 | <entry>2500</entry><entry>full</entry></row> |
634 | ||
d7dce7b6 | 635 | <row><entry><option>1000basekx-full</option></entry> |
6cf0a204 SS |
636 | <entry>1000</entry><entry>full</entry></row> |
637 | ||
d7dce7b6 | 638 | <row><entry><option>10000basekx4-full</option></entry> |
6cf0a204 SS |
639 | <entry>10000</entry><entry>full</entry></row> |
640 | ||
d7dce7b6 | 641 | <row><entry><option>10000basekr-full</option></entry> |
6cf0a204 SS |
642 | <entry>10000</entry><entry>full</entry></row> |
643 | ||
d7dce7b6 | 644 | <row><entry><option>10000baser-fec</option></entry> |
6cf0a204 SS |
645 | <entry>10000</entry><entry>full</entry></row> |
646 | ||
d7dce7b6 | 647 | <row><entry><option>20000basemld2-full</option></entry> |
6cf0a204 SS |
648 | <entry>20000</entry><entry>full</entry></row> |
649 | ||
d7dce7b6 | 650 | <row><entry><option>20000basekr2-full</option></entry> |
6cf0a204 SS |
651 | <entry>20000</entry><entry>full</entry></row> |
652 | </tbody> | |
653 | </tgroup> | |
654 | </table> | |
655 | ||
656 | By default this is unset, i.e. all possible modes will be advertised. | |
657 | This option may be specified more than once, in which case all specified speeds and modes are advertised. | |
658 | If the empty string is assigned to this option, the list is reset, and all prior assignments have no effect. | |
659 | </para> | |
660 | </listitem> | |
661 | </varlistentry> | |
bf2334c0 YW |
662 | <varlistentry> |
663 | <term><varname>ReceiveChecksumOffload=</varname></term> | |
664 | <listitem> | |
665 | <para>Takes a boolean. If set to true, the hardware offload for checksumming of ingress | |
666 | network packets is enabled. When unset, the kernel's default will be used.</para> | |
667 | </listitem> | |
668 | </varlistentry> | |
669 | <varlistentry> | |
670 | <term><varname>TransmitChecksumOffload=</varname></term> | |
671 | <listitem> | |
672 | <para>Takes a boolean. If set to true, the hardware offload for checksumming of egress | |
673 | network packets is enabled. When unset, the kernel's default will be used.</para> | |
674 | </listitem> | |
675 | </varlistentry> | |
50725d10 SS |
676 | <varlistentry> |
677 | <term><varname>TCPSegmentationOffload=</varname></term> | |
678 | <listitem> | |
9b6ffef3 | 679 | <para>Takes a boolean. If set to true, the TCP Segmentation Offload (TSO) is enabled. |
025314d9 | 680 | When unset, the kernel's default will be used.</para> |
50725d10 | 681 | </listitem> |
ffa69a04 SS |
682 | </varlistentry> |
683 | <varlistentry> | |
684 | <term><varname>TCP6SegmentationOffload=</varname></term> | |
685 | <listitem> | |
9b6ffef3 | 686 | <para>Takes a boolean. If set to true, the TCP6 Segmentation Offload (tx-tcp6-segmentation) is enabled. |
025314d9 | 687 | When unset, the kernel's default will be used.</para> |
ffa69a04 | 688 | </listitem> |
50725d10 SS |
689 | </varlistentry> |
690 | <varlistentry> | |
691 | <term><varname>GenericSegmentationOffload=</varname></term> | |
692 | <listitem> | |
9b6ffef3 | 693 | <para>Takes a boolean. If set to true, the Generic Segmentation Offload (GSO) is enabled. |
025314d9 | 694 | When unset, the kernel's default will be used.</para> |
50725d10 SS |
695 | </listitem> |
696 | </varlistentry> | |
bf2334c0 | 697 | <varlistentry> |
f7ea90fb SS |
698 | <term><varname>GenericReceiveOffload=</varname></term> |
699 | <listitem> | |
9b6ffef3 | 700 | <para>Takes a boolean. If set to true, the Generic Receive Offload (GRO) is enabled. |
025314d9 | 701 | When unset, the kernel's default will be used.</para> |
f7ea90fb SS |
702 | </listitem> |
703 | </varlistentry> | |
704 | <varlistentry> | |
705 | <term><varname>LargeReceiveOffload=</varname></term> | |
706 | <listitem> | |
9b6ffef3 | 707 | <para>Takes a boolean. If set to true, the Large Receive Offload (LRO) is enabled. |
025314d9 | 708 | When unset, the kernel's default will be used.</para> |
f7ea90fb SS |
709 | </listitem> |
710 | </varlistentry> | |
5f945202 SS |
711 | <varlistentry> |
712 | <term><varname>RxChannels=</varname></term> | |
5f945202 | 713 | <term><varname>TxChannels=</varname></term> |
5f945202 | 714 | <term><varname>OtherChannels=</varname></term> |
5f945202 SS |
715 | <term><varname>CombinedChannels=</varname></term> |
716 | <listitem> | |
0d341ecc YW |
717 | <para>Specifies the number of receive, transmit, other, or combined channels, respectively. |
718 | Takes an unsigned integer in the range 1…4294967295 or <literal>max</literal>. If set to | |
719 | <literal>max</literal>, the advertised maximum value of the hardware will be used. When | |
720 | unset, the number will not be changed. Defaults to unset.</para> | |
5f945202 SS |
721 | </listitem> |
722 | </varlistentry> | |
224ded67 SS |
723 | <varlistentry> |
724 | <term><varname>RxBufferSize=</varname></term> | |
e81f5fc4 | 725 | <term><varname>RxMiniBufferSize=</varname></term> |
e81f5fc4 | 726 | <term><varname>RxJumboBufferSize=</varname></term> |
224ded67 SS |
727 | <term><varname>TxBufferSize=</varname></term> |
728 | <listitem> | |
0d341ecc YW |
729 | <para>Specifies the maximum number of pending packets in the NIC receive buffer, mini receive |
730 | buffer, jumbo receive buffer, or transmit buffer, respectively. Takes an unsigned integer in | |
731 | the range 1…4294967295 or <literal>max</literal>. If set to <literal>max</literal>, the | |
732 | advertised maximum value of the hardware will be used. When unset, the number will not be | |
733 | changed. Defaults to unset.</para> | |
224ded67 SS |
734 | </listitem> |
735 | </varlistentry> | |
a34811e4 YW |
736 | <varlistentry> |
737 | <term><varname>RxFlowControl=</varname></term> | |
738 | <listitem> | |
739 | <para>Takes a boolean. When set, enables the receive flow control, also known as the ethernet | |
740 | receive PAUSE message (generate and send ethernet PAUSE frames). When unset, the kernel's | |
741 | default will be used.</para> | |
742 | </listitem> | |
743 | </varlistentry> | |
744 | <varlistentry> | |
745 | <term><varname>TxFlowControl=</varname></term> | |
746 | <listitem> | |
747 | <para>Takes a boolean. When set, enables the transmit flow control, also known as the ethernet | |
748 | transmit PAUSE message (respond to received ethernet PAUSE frames). When unset, the kernel's | |
749 | default will be used.</para> | |
750 | </listitem> | |
751 | </varlistentry> | |
752 | <varlistentry> | |
753 | <term><varname>AutoNegotiationFlowControl=</varname></term> | |
754 | <listitem> | |
755 | <para>Takes a boolean. When set, the auto negotiation enables the interface to exchange state | |
756 | advertisements with the connected peer so that the two devices can agree on the ethernet | |
757 | PAUSE configuration. When unset, the kernel's default will be used.</para> | |
758 | </listitem> | |
759 | </varlistentry> | |
1e270127 SS |
760 | <varlistentry> |
761 | <term><varname>GenericSegmentOffloadMaxBytes=</varname></term> | |
762 | <listitem> | |
763 | <para>Specifies the maximum size of a Generic Segment Offload (GSO) packet the | |
be0d27ee | 764 | device should accept. The usual suffixes K, M, G are supported and are |
1d3a473b | 765 | understood to the base of 1024. An unsigned integer in the range 1…65536. |
1e270127 SS |
766 | Defaults to unset.</para> |
767 | </listitem> | |
768 | </varlistentry> | |
769 | <varlistentry> | |
770 | <term><varname>GenericSegmentOffloadMaxSegments=</varname></term> | |
771 | <listitem> | |
be0d27ee ZJS |
772 | <para>Specifies the maximum number of Generic Segment Offload (GSO) segments the device should |
773 | accept. An unsigned integer in the range 1…65535. Defaults to unset.</para> | |
1e270127 SS |
774 | </listitem> |
775 | </varlistentry> | |
224ded67 | 776 | |
798d3a52 ZJS |
777 | </variablelist> |
778 | </refsect1> | |
1ff28eae | 779 | |
798d3a52 | 780 | <refsect1> |
b97e7fab LP |
781 | <title>Examples</title> |
782 | ||
783 | <example> | |
784 | <title>/usr/lib/systemd/network/99-default.link</title> | |
785 | ||
786 | <para>The link file <filename>99-default.link</filename> that is | |
787 | shipped with systemd defines the default naming policy for | |
788 | links.</para> | |
789 | ||
790 | <programlisting>[Link] | |
791 | NamePolicy=kernel database onboard slot path | |
792 | MACAddressPolicy=persistent</programlisting> | |
793 | </example> | |
794 | ||
795 | <example> | |
796 | <title>/etc/systemd/network/10-dmz.link</title> | |
797 | ||
58576937 | 798 | <para>This example assigns the fixed name <literal>dmz0</literal> to the interface with the MAC address |
b97e7fab LP |
799 | 00:a0:de:63:7a:e6:</para> |
800 | ||
801 | <programlisting>[Match] | |
802 | MACAddress=00:a0:de:63:7a:e6 | |
803 | ||
804 | [Link] | |
805 | Name=dmz0</programlisting> | |
58576937 | 806 | |
7a447d21 | 807 | <para><varname>NamePolicy=</varname> is not set, so <varname>Name=</varname> takes effect. We use the |
a19b9a38 | 808 | <literal>10-</literal> prefix to order this file early in the list. Note that it needs to be before |
7a447d21 ZJS |
809 | <literal>99-link</literal>, i.e. it needs a numerical prefix, to have any effect at all.</para> |
810 | </example> | |
811 | ||
812 | <example> | |
813 | <title>Debugging <varname>NamePolicy=</varname> assignments</title> | |
814 | ||
815 | <programlisting>$ sudo SYSTEMD_LOG_LEVEL=debug udevadm test-builtin net_setup_link /sys/class/net/hub0 | |
816 | … | |
817 | Parsed configuration file /usr/lib/systemd/network/99-default.link | |
818 | Parsed configuration file /etc/systemd/network/10-eth0.link | |
819 | ID_NET_DRIVER=cdc_ether | |
820 | Config file /etc/systemd/network/10-eth0.link applies to device hub0 | |
821 | link_config: autonegotiation is unset or enabled, the speed and duplex are not writable. | |
822 | hub0: Device has name_assign_type=4 | |
823 | Using default interface naming scheme 'v240'. | |
824 | hub0: Policies didn't yield a name, using specified Name=hub0. | |
825 | ID_NET_LINK_FILE=/etc/systemd/network/10-eth0.link | |
826 | ID_NET_NAME=hub0 | |
827 | …</programlisting> | |
828 | ||
829 | <para>Explicit <varname>Name=</varname> configuration wins in this case.</para> | |
830 | ||
831 | <programlisting>sudo SYSTEMD_LOG_LEVEL=debug udevadm test-builtin net_setup_link /sys/class/net/enp0s31f6 | |
832 | … | |
833 | Parsed configuration file /usr/lib/systemd/network/99-default.link | |
834 | Parsed configuration file /etc/systemd/network/10-eth0.link | |
835 | Created link configuration context. | |
836 | ID_NET_DRIVER=e1000e | |
837 | Config file /usr/lib/systemd/network/99-default.link applies to device enp0s31f6 | |
838 | link_config: autonegotiation is unset or enabled, the speed and duplex are not writable. | |
839 | enp0s31f6: Device has name_assign_type=4 | |
840 | Using default interface naming scheme 'v240'. | |
841 | enp0s31f6: Policy *keep*: keeping existing userspace name | |
842 | enp0s31f6: Device has addr_assign_type=0 | |
843 | enp0s31f6: MAC on the device already matches policy *persistent* | |
844 | ID_NET_LINK_FILE=/usr/lib/systemd/network/99-default.link | |
845 | … | |
846 | </programlisting> | |
847 | ||
848 | <para>In this case, the interface was already renamed, so the <option>keep</option> policy specified as | |
b0343f8c | 849 | the first option in <filename index="false">99-default.link</filename> means that the existing name is |
7a447d21 ZJS |
850 | preserved. If <option>keep</option> was removed, or if were in boot before the renaming has happened, |
851 | we might get the following instead:</para> | |
852 | ||
853 | <programlisting>enp0s31f6: Policy *path* yields "enp0s31f6". | |
854 | enp0s31f6: Device has addr_assign_type=0 | |
855 | enp0s31f6: MAC on the device already matches policy *persistent* | |
856 | ID_NET_LINK_FILE=/usr/lib/systemd/network/99-default.link | |
857 | ID_NET_NAME=enp0s31f6 | |
858 | … | |
859 | </programlisting> | |
860 | ||
861 | <para>Please note that the details of output are subject to change.</para> | |
b97e7fab LP |
862 | </example> |
863 | ||
864 | <example> | |
865 | <title>/etc/systemd/network/10-internet.link</title> | |
866 | ||
867 | <para>This example assigns the fixed name | |
868 | <literal>internet0</literal> to the interface with the device | |
869 | path <literal>pci-0000:00:1a.0-*</literal>:</para> | |
870 | ||
871 | <programlisting>[Match] | |
872 | Path=pci-0000:00:1a.0-* | |
873 | ||
874 | [Link] | |
875 | Name=internet0</programlisting> | |
876 | </example> | |
877 | ||
798d3a52 | 878 | <example> |
6c1695be | 879 | <title>/etc/systemd/network/25-wireless.link</title> |
1ff28eae | 880 | |
b97e7fab LP |
881 | <para>Here's an overly complex example that shows the use of a large number of [Match] and [Link] settings.</para> |
882 | ||
798d3a52 | 883 | <programlisting>[Match] |
7abaad1a | 884 | MACAddress=12:34:56:78:9a:bc |
885 | Driver=brcmsmac | |
886 | Path=pci-0000:02:00.0-* | |
887 | Type=wlan | |
888 | Virtualization=no | |
889 | Host=my-laptop | |
890 | Architecture=x86-64 | |
1ff28eae | 891 | |
7abaad1a | 892 | [Link] |
893 | Name=wireless0 | |
894 | MTUBytes=1450 | |
895 | BitsPerSecond=10M | |
896 | WakeOnLan=magic | |
897 | MACAddress=cb:a9:87:65:43:21</programlisting> | |
798d3a52 ZJS |
898 | </example> |
899 | </refsect1> | |
1ff28eae | 900 | |
798d3a52 ZJS |
901 | <refsect1> |
902 | <title>See Also</title> | |
903 | <para> | |
904 | <citerefentry> | |
905 | <refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum> | |
906 | </citerefentry>, | |
907 | <citerefentry> | |
908 | <refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum> | |
909 | </citerefentry>, | |
910 | <citerefentry> | |
911 | <refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum> | |
912 | </citerefentry>, | |
913 | <citerefentry> | |
914 | <refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum> | |
915 | </citerefentry> | |
916 | </para> | |
917 | </refsect1> | |
1ff28eae TG |
918 | |
919 | </refentry> |