]>
Commit | Line | Data |
---|---|---|
b97e7fab | 1 | <?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> |
1ff28eae | 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
1ff28eae TG |
4 | |
5 | <!-- | |
572eb058 ZJS |
6 | SPDX-License-Identifier: LGPL-2.1+ |
7 | ||
96b2fb93 | 8 | Copyright © 2014 Tom Gundersen |
1ff28eae TG |
9 | --> |
10 | ||
11 | <refentry id="systemd.link"> | |
798d3a52 ZJS |
12 | <refentryinfo> |
13 | <title>systemd.link</title> | |
14 | <productname>systemd</productname> | |
1ff28eae | 15 | |
798d3a52 ZJS |
16 | <authorgroup> |
17 | <author> | |
18 | <contrib>Developer</contrib> | |
19 | <firstname>Tom</firstname> | |
20 | <surname>Gundersen</surname> | |
21 | </author> | |
22 | </authorgroup> | |
23 | </refentryinfo> | |
1ff28eae | 24 | |
798d3a52 ZJS |
25 | <refmeta> |
26 | <refentrytitle>systemd.link</refentrytitle> | |
27 | <manvolnum>5</manvolnum> | |
28 | </refmeta> | |
1ff28eae | 29 | |
798d3a52 ZJS |
30 | <refnamediv> |
31 | <refname>systemd.link</refname> | |
32 | <refpurpose>Network device configuration</refpurpose> | |
33 | </refnamediv> | |
1ff28eae | 34 | |
798d3a52 ZJS |
35 | <refsynopsisdiv> |
36 | <para><filename><replaceable>link</replaceable>.link</filename></para> | |
37 | </refsynopsisdiv> | |
1ff28eae | 38 | |
798d3a52 ZJS |
39 | <refsect1> |
40 | <title>Description</title> | |
1ff28eae | 41 | |
798d3a52 ZJS |
42 | <para>Network link configuration is performed by the |
43 | <command>net_setup_link</command> udev builtin.</para> | |
1ff28eae | 44 | |
798d3a52 | 45 | <para>The link files are read from the files located in the system |
12b42c76 | 46 | network directory <filename>/usr/lib/systemd/network</filename>, |
798d3a52 ZJS |
47 | the volatile runtime network directory |
48 | <filename>/run/systemd/network</filename>, and the local | |
49 | administration network directory | |
12b42c76 | 50 | <filename>/etc/systemd/network</filename>. Link files must have |
798d3a52 ZJS |
51 | the extension <filename>.link</filename>; other extensions are |
52 | ignored. All link files are collectively sorted and processed in | |
53 | lexical order, regardless of the directories in which they live. | |
54 | However, files with identical filenames replace each other. Files | |
55 | in <filename>/etc</filename> have the highest priority, files in | |
56 | <filename>/run</filename> take precedence over files with the same | |
12b42c76 | 57 | name in <filename>/usr/lib</filename>. This can be used to |
57e27ec0 ZJS |
58 | override a system-supplied link file with a local file if needed. |
59 | As a special case, an empty file (file size 0) or symlink with the | |
a8eaaee7 | 60 | same name pointing to <filename>/dev/null</filename> disables the |
57e27ec0 | 61 | configuration file entirely (it is "masked").</para> |
1ff28eae | 62 | |
798d3a52 ZJS |
63 | <para>The link file contains a <literal>[Match]</literal> section, |
64 | which determines if a given link file may be applied to a given | |
65 | device, as well as a <literal>[Link]</literal> section specifying | |
66 | how the device should be configured. The first (in lexical order) | |
67 | of the link files that matches a given device is applied. Note | |
68 | that a default file <filename>99-default.link</filename> is | |
1b934761 | 69 | shipped by the system. Any user-supplied |
798d3a52 ZJS |
70 | <filename>.link</filename> should hence have a lexically earlier |
71 | name to be considered at all.</para> | |
788f37c7 TG |
72 | |
73 | <para>See | |
74 | <citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
75 | for diagnosing problems with <filename>.link</filename> files.</para> | |
798d3a52 | 76 | </refsect1> |
102bd40e | 77 | |
798d3a52 ZJS |
78 | <refsect1> |
79 | <title>[Match] Section Options</title> | |
1ff28eae | 80 | |
798d3a52 ZJS |
81 | <para>A link file is said to match a device if each of the entries |
82 | in the <literal>[Match]</literal> section matches, or if the | |
83 | section is empty. The following keys are accepted:</para> | |
1ff28eae | 84 | |
798d3a52 ZJS |
85 | <variablelist class='network-directives'> |
86 | <varlistentry> | |
87 | <term><varname>MACAddress=</varname></term> | |
88 | <listitem> | |
9310bf4b YW |
89 | <para>A whitespace-separated list of hardware addresses. Use full colon-, hyphen- or dot-delimited hexadecimal. See the example below. |
90 | 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 | |
91 | of hardware addresses defined prior to this is reset.</para> | |
92 | ||
93 | <para>Example: | |
94 | <programlisting>MACAddress=01:23:45:67:89:ab 00-11-22-33-44-55 AABB.CCDD.EEFF</programlisting></para> | |
798d3a52 ZJS |
95 | </listitem> |
96 | </varlistentry> | |
97 | <varlistentry> | |
98 | <term><varname>OriginalName=</varname></term> | |
99 | <listitem> | |
5256e00e TG |
100 | <para>A whitespace-separated list of shell-style globs matching |
101 | the device name, as exposed by the udev property | |
2dd67817 | 102 | "INTERFACE". This cannot be used to match on names that have |
5256e00e | 103 | already been changed from userspace. Caution is advised when matching on |
798d3a52 ZJS |
104 | kernel-assigned names, as they are known to be unstable |
105 | between reboots.</para> | |
106 | </listitem> | |
107 | </varlistentry> | |
108 | <varlistentry> | |
109 | <term><varname>Path=</varname></term> | |
110 | <listitem> | |
5256e00e TG |
111 | <para>A whitespace-separated list of shell-style globs matching |
112 | the persistent path, as exposed by the udev property | |
113 | <literal>ID_PATH</literal>.</para> | |
798d3a52 ZJS |
114 | </listitem> |
115 | </varlistentry> | |
116 | <varlistentry> | |
117 | <term><varname>Driver=</varname></term> | |
118 | <listitem> | |
5256e00e TG |
119 | <para>A whitespace-separated list of shell-style globs matching |
120 | the driver currently bound to the device, | |
798d3a52 ZJS |
121 | as exposed by the udev property <literal>DRIVER</literal> |
122 | of its parent device, or if that is not set, the | |
123 | driver as exposed by <literal>ethtool -i</literal> | |
124 | of the device itself.</para> | |
125 | </listitem> | |
126 | </varlistentry> | |
127 | <varlistentry> | |
128 | <term><varname>Type=</varname></term> | |
129 | <listitem> | |
5256e00e TG |
130 | <para>A whitespace-separated list of shell-style globs matching |
131 | the device type, as exposed by the udev | |
798d3a52 ZJS |
132 | property <literal>DEVTYPE</literal>.</para> |
133 | </listitem> | |
134 | </varlistentry> | |
135 | <varlistentry> | |
136 | <term><varname>Host=</varname></term> | |
137 | <listitem> | |
138 | <para>Matches against the hostname or machine | |
139 | ID of the host. See <literal>ConditionHost=</literal> in | |
140 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
141 | for details.</para> | |
142 | </listitem> | |
143 | </varlistentry> | |
144 | <varlistentry> | |
145 | <term><varname>Virtualization=</varname></term> | |
146 | <listitem> | |
147 | <para>Checks whether the system is executed in | |
148 | a virtualized environment and optionally test | |
149 | whether it is a specific implementation. See | |
150 | <literal>ConditionVirtualization=</literal> in | |
151 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
152 | for details.</para> | |
153 | </listitem> | |
154 | </varlistentry> | |
155 | <varlistentry> | |
156 | <term><varname>KernelCommandLine=</varname></term> | |
157 | <listitem> | |
158 | <para>Checks whether a specific kernel command line option | |
159 | is set (or if prefixed with the exclamation mark unset). See | |
160 | <literal>ConditionKernelCommandLine=</literal> in | |
161 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
162 | for details.</para> | |
163 | </listitem> | |
164 | </varlistentry> | |
5022f08a LP |
165 | <varlistentry> |
166 | <term><varname>KernelVersion=</varname></term> | |
167 | <listitem> | |
168 | <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a certain | |
169 | expression (or if prefixed with the exclamation mark does not match it). See | |
170 | <literal>ConditionKernelVersion=</literal> in | |
171 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> for | |
172 | details. | |
173 | </para> | |
174 | </listitem> | |
175 | </varlistentry> | |
798d3a52 ZJS |
176 | <varlistentry> |
177 | <term><varname>Architecture=</varname></term> | |
178 | <listitem> | |
179 | <para>Checks whether the system is running on a specific | |
180 | architecture. See <literal>ConditionArchitecture=</literal> | |
181 | in | |
182 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
183 | for details.</para> | |
184 | </listitem> | |
185 | </varlistentry> | |
186 | </variablelist> | |
1ff28eae | 187 | |
798d3a52 | 188 | </refsect1> |
102bd40e | 189 | |
798d3a52 ZJS |
190 | <refsect1> |
191 | <title>[Link] Section Options</title> | |
102bd40e | 192 | |
798d3a52 ZJS |
193 | <para>The <literal>[Link]</literal> section accepts the following |
194 | keys:</para> | |
1ff28eae | 195 | |
798d3a52 ZJS |
196 | <variablelist class='network-directives'> |
197 | <varlistentry> | |
198 | <term><varname>Description=</varname></term> | |
199 | <listitem> | |
200 | <para>A description of the device.</para> | |
201 | </listitem> | |
202 | </varlistentry> | |
203 | <varlistentry> | |
204 | <term><varname>Alias=</varname></term> | |
205 | <listitem> | |
206 | <para>The <literal>ifalias</literal> is set to this | |
207 | value.</para> | |
208 | </listitem> | |
209 | </varlistentry> | |
210 | <varlistentry> | |
211 | <term><varname>MACAddressPolicy=</varname></term> | |
212 | <listitem> | |
213 | <para>The policy by which the MAC address should be set. The | |
214 | available policies are: | |
215 | </para> | |
1ff28eae | 216 | |
798d3a52 ZJS |
217 | <variablelist> |
218 | <varlistentry> | |
219 | <term><literal>persistent</literal></term> | |
220 | <listitem> | |
221 | <para>If the hardware has a persistent MAC address, as | |
222 | most hardware should, and if it is used by the kernel, | |
223 | nothing is done. Otherwise, a new MAC address is | |
224 | generated which is guaranteed to be the same on every | |
225 | boot for the given machine and the given device, but | |
1c25683e | 226 | which is otherwise random. This feature depends on ID_NET_NAME_* |
a8eaaee7 | 227 | properties to exist for the link. On hardware where these |
b938cb90 | 228 | properties are not set, the generation of a persistent MAC address |
1c25683e | 229 | will fail.</para> |
798d3a52 ZJS |
230 | </listitem> |
231 | </varlistentry> | |
232 | <varlistentry> | |
233 | <term><literal>random</literal></term> | |
234 | <listitem> | |
235 | <para>If the kernel is using a random MAC address, | |
236 | nothing is done. Otherwise, a new address is randomly | |
237 | generated each time the device appears, typically at | |
b938cb90 | 238 | boot. Either way, the random address will have the |
2e229e0c TG |
239 | <literal>unicast</literal> and |
240 | <literal>locally administered</literal> bits set.</para> | |
798d3a52 ZJS |
241 | </listitem> |
242 | </varlistentry> | |
66d3752e JK |
243 | <varlistentry> |
244 | <term><literal>none</literal></term> | |
245 | <listitem> | |
246 | <para>Keeps the MAC address assigned by the kernel.</para> | |
247 | </listitem> | |
248 | </varlistentry> | |
798d3a52 ZJS |
249 | </variablelist> |
250 | </listitem> | |
251 | </varlistentry> | |
252 | <varlistentry> | |
253 | <term><varname>MACAddress=</varname></term> | |
254 | <listitem> | |
255 | <para>The MAC address to use, if no | |
256 | <literal>MACAddressPolicy=</literal> | |
257 | is specified.</para> | |
258 | </listitem> | |
259 | </varlistentry> | |
260 | <varlistentry> | |
261 | <term><varname>NamePolicy=</varname></term> | |
262 | <listitem> | |
263 | <para>An ordered, space-separated list of policies by which | |
264 | the interface name should be set. | |
265 | <literal>NamePolicy</literal> may be disabled by specifying | |
266 | <literal>net.ifnames=0</literal> on the kernel command line. | |
267 | Each of the policies may fail, and the first successful one | |
268 | is used. The name is not set directly, but is exported to | |
269 | udev as the property <literal>ID_NET_NAME</literal>, which | |
270 | is, by default, used by a udev rule to set | |
271 | <literal>NAME</literal>. If the name has already been set by | |
272 | userspace, no renaming is performed. The available policies | |
273 | are:</para> | |
1ff28eae | 274 | |
798d3a52 ZJS |
275 | <variablelist> |
276 | <varlistentry> | |
277 | <term><literal>kernel</literal></term> | |
278 | <listitem> | |
279 | <para>If the kernel claims that the name it has set | |
280 | for a device is predictable, then no renaming is | |
281 | performed.</para> | |
282 | </listitem> | |
283 | </varlistentry> | |
284 | <varlistentry> | |
285 | <term><literal>database</literal></term> | |
286 | <listitem> | |
287 | <para>The name is set based on entries in the udev's | |
288 | Hardware Database with the key | |
289 | <literal>ID_NET_NAME_FROM_DATABASE</literal>. | |
290 | </para> | |
291 | </listitem> | |
292 | </varlistentry> | |
293 | <varlistentry> | |
294 | <term><literal>onboard</literal></term> | |
295 | <listitem> | |
296 | <para>The name is set based on information given by | |
297 | the firmware for on-board devices, as exported by the | |
298 | udev property <literal>ID_NET_NAME_ONBOARD</literal>. | |
299 | </para> | |
300 | </listitem> | |
301 | </varlistentry> | |
302 | <varlistentry> | |
303 | <term><literal>slot</literal></term> | |
304 | <listitem> | |
305 | <para>The name is set based on information given by | |
306 | the firmware for hot-plug devices, as exported by the | |
307 | udev property <literal>ID_NET_NAME_SLOT</literal>. | |
308 | </para> | |
309 | </listitem> | |
310 | </varlistentry> | |
311 | <varlistentry> | |
312 | <term><literal>path</literal></term> | |
313 | <listitem> | |
314 | <para>The name is set based on the device's physical | |
315 | location, as exported by the udev property | |
316 | <literal>ID_NET_NAME_PATH</literal>.</para> | |
317 | </listitem> | |
318 | </varlistentry> | |
319 | <varlistentry> | |
320 | <term><literal>mac</literal></term> | |
321 | <listitem> | |
322 | <para>The name is set based on the device's persistent | |
323 | MAC address, as exported by the udev property | |
324 | <literal>ID_NET_NAME_MAC</literal>.</para> | |
325 | </listitem> | |
326 | </varlistentry> | |
327 | </variablelist> | |
328 | </listitem> | |
329 | </varlistentry> | |
330 | <varlistentry> | |
331 | <term><varname>Name=</varname></term> | |
332 | <listitem> | |
333 | <para>The interface name to use in case all the | |
334 | policies specified in | |
335 | <varname>NamePolicy=</varname> fail, or in case | |
336 | <varname>NamePolicy=</varname> is missing or | |
337 | disabled.</para> | |
1b934761 ZJS |
338 | |
339 | <para>Note that specifying a name that the kernel might use for another | |
340 | interface (for example <literal>eth0</literal>) is dangerous because the | |
341 | name assignment done by udev will race with the assignment done by the | |
342 | kernel, and only one interface may use the name. Depending on the order of | |
343 | operations, either udev or the kernel will win, making the naming | |
344 | unpredictable. It is best to use some different prefix, for example | |
345 | <literal>internal0</literal>/<literal>external0</literal> or | |
346 | <literal>lan0</literal>/<literal>lan1</literal>/<literal>lan3</literal>. | |
347 | </para> | |
798d3a52 ZJS |
348 | </listitem> |
349 | </varlistentry> | |
350 | <varlistentry> | |
351 | <term><varname>MTUBytes=</varname></term> | |
352 | <listitem> | |
353 | <para>The maximum transmission unit in bytes to set for the | |
354 | device. The usual suffixes K, M, G, are supported and are | |
355 | understood to the base of 1024.</para> | |
356 | </listitem> | |
357 | </varlistentry> | |
358 | <varlistentry> | |
359 | <term><varname>BitsPerSecond=</varname></term> | |
360 | <listitem> | |
361 | <para>The speed to set for the device, the value is rounded | |
362 | down to the nearest Mbps. The usual suffixes K, M, G, are | |
363 | supported and are understood to the base of 1000.</para> | |
364 | </listitem> | |
365 | </varlistentry> | |
366 | <varlistentry> | |
367 | <term><varname>Duplex=</varname></term> | |
368 | <listitem> | |
369 | <para>The duplex mode to set for the device. The accepted | |
370 | values are <literal>half</literal> and | |
371 | <literal>full</literal>.</para> | |
372 | </listitem> | |
373 | </varlistentry> | |
a39f92d3 SS |
374 | <varlistentry> |
375 | <term><varname>AutoNegotiation=</varname></term> | |
376 | <listitem> | |
377 | <para>Enables or disables automatic negotiation of transmission parameters. | |
378 | Autonegotiation is a procedure by which two connected ethernet devices choose | |
379 | common transmission parameters, such as speed, duplex mode, and flow control. | |
380 | Takes a boolean value. Unset by default, which means that the kernel default | |
381 | will be used.</para> | |
382 | ||
383 | <para>Note that if autonegotiation is enabled, speed and duplex settings are | |
384 | read-only. If autonegotation is disabled, speed and duplex settings are writable | |
385 | if the driver supports multiple link modes.</para> | |
386 | </listitem> | |
387 | </varlistentry> | |
798d3a52 ZJS |
388 | <varlistentry> |
389 | <term><varname>WakeOnLan=</varname></term> | |
390 | <listitem> | |
391 | <para>The Wake-on-LAN policy to set for the device. The | |
392 | supported values are:</para> | |
1ff28eae | 393 | |
798d3a52 ZJS |
394 | <variablelist> |
395 | <varlistentry> | |
396 | <term><literal>phy</literal></term> | |
397 | <listitem> | |
398 | <para>Wake on PHY activity.</para> | |
399 | </listitem> | |
400 | </varlistentry> | |
617da14c SS |
401 | <varlistentry> |
402 | <term><literal>unicast</literal></term> | |
403 | <listitem> | |
404 | <para>Wake on unicast messages.</para> | |
405 | </listitem> | |
406 | </varlistentry> | |
407 | <varlistentry> | |
408 | <term><literal>multicast</literal></term> | |
409 | <listitem> | |
410 | <para>Wake on multicast messages.</para> | |
411 | </listitem> | |
412 | </varlistentry> | |
413 | <varlistentry> | |
414 | <term><literal>broadcast</literal></term> | |
415 | <listitem> | |
416 | <para>Wake on broadcast messages.</para> | |
417 | </listitem> | |
418 | </varlistentry> | |
419 | <varlistentry> | |
420 | <term><literal>arp</literal></term> | |
421 | <listitem> | |
422 | <para>Wake on ARP.</para> | |
423 | </listitem> | |
424 | </varlistentry> | |
798d3a52 ZJS |
425 | <varlistentry> |
426 | <term><literal>magic</literal></term> | |
427 | <listitem> | |
428 | <para>Wake on receipt of a magic packet. | |
429 | </para> | |
430 | </listitem> | |
431 | </varlistentry> | |
617da14c SS |
432 | <varlistentry> |
433 | <term><literal>secureon</literal></term> | |
434 | <listitem> | |
435 | <para>Enable secureon(tm) password for MagicPacket(tm). | |
436 | </para> | |
437 | </listitem> | |
438 | </varlistentry> | |
798d3a52 ZJS |
439 | <varlistentry> |
440 | <term><literal>off</literal></term> | |
441 | <listitem> | |
442 | <para>Never wake.</para> | |
443 | </listitem> | |
444 | </varlistentry> | |
445 | </variablelist> | |
c605bd00 ZJS |
446 | |
447 | <para>Defaults to <literal>off</literal>.</para> | |
798d3a52 ZJS |
448 | </listitem> |
449 | </varlistentry> | |
593022fa SS |
450 | <varlistentry> |
451 | <term><varname>Port=</varname></term> | |
452 | <listitem> | |
453 | <para>The port option is used to select the device port. The | |
454 | supported values are:</para> | |
455 | ||
456 | <variablelist> | |
457 | <varlistentry> | |
458 | <term><literal>tp</literal></term> | |
459 | <listitem> | |
460 | <para>An Ethernet interface using Twisted-Pair cable as the medium.</para> | |
461 | </listitem> | |
462 | </varlistentry> | |
463 | <varlistentry> | |
464 | <term><literal>aui</literal></term> | |
465 | <listitem> | |
466 | <para>Attachment Unit Interface (AUI). Normally used with hubs. | |
467 | </para> | |
468 | </listitem> | |
469 | </varlistentry> | |
470 | <varlistentry> | |
471 | <term><literal>bnc</literal></term> | |
472 | <listitem> | |
473 | <para>An Ethernet interface using BNC connectors and co-axial cable.</para> | |
474 | </listitem> | |
475 | </varlistentry> | |
476 | <varlistentry> | |
477 | <term><literal>mii</literal></term> | |
478 | <listitem> | |
479 | <para>An Ethernet interface using a Media Independent Interface (MII).</para> | |
480 | </listitem> | |
481 | </varlistentry> | |
482 | <varlistentry> | |
483 | <term><literal>fibre</literal></term> | |
484 | <listitem> | |
485 | <para>An Ethernet interface using Optical Fibre as the medium.</para> | |
486 | </listitem> | |
487 | </varlistentry> | |
488 | </variablelist> | |
489 | </listitem> | |
490 | </varlistentry> | |
50725d10 SS |
491 | <varlistentry> |
492 | <term><varname>TCPSegmentationOffload=</varname></term> | |
493 | <listitem> | |
494 | <para>The TCP Segmentation Offload (TSO) when true enables | |
495 | TCP segmentation offload. Takes a boolean value. | |
496 | Defaults to "unset".</para> | |
497 | </listitem> | |
ffa69a04 SS |
498 | </varlistentry> |
499 | <varlistentry> | |
500 | <term><varname>TCP6SegmentationOffload=</varname></term> | |
501 | <listitem> | |
502 | <para>The TCP6 Segmentation Offload (tx-tcp6-segmentation) when true enables | |
503 | TCP6 segmentation offload. Takes a boolean value. | |
504 | Defaults to "unset".</para> | |
505 | </listitem> | |
50725d10 SS |
506 | </varlistentry> |
507 | <varlistentry> | |
508 | <term><varname>GenericSegmentationOffload=</varname></term> | |
509 | <listitem> | |
510 | <para>The Generic Segmentation Offload (GSO) when true enables | |
511 | generic segmentation offload. Takes a boolean value. | |
512 | Defaults to "unset".</para> | |
513 | </listitem> | |
514 | </varlistentry> | |
f7ea90fb SS |
515 | <varlistentry> |
516 | <term><varname>GenericReceiveOffload=</varname></term> | |
517 | <listitem> | |
518 | <para>The Generic Receive Offload (GRO) when true enables | |
519 | generic receive offload. Takes a boolean value. | |
520 | Defaults to "unset".</para> | |
521 | </listitem> | |
522 | </varlistentry> | |
523 | <varlistentry> | |
524 | <term><varname>LargeReceiveOffload=</varname></term> | |
525 | <listitem> | |
526 | <para>The Large Receive Offload (LRO) when true enables | |
527 | large receive offload. Takes a boolean value. | |
528 | Defaults to "unset".</para> | |
529 | </listitem> | |
530 | </varlistentry> | |
5f945202 SS |
531 | <varlistentry> |
532 | <term><varname>RxChannels=</varname></term> | |
533 | <listitem> | |
534 | <para>Sets the number of receive channels (a number between 1 and 4294967295) .</para> | |
535 | </listitem> | |
536 | </varlistentry> | |
537 | <varlistentry> | |
538 | <term><varname>TxChannels=</varname></term> | |
539 | <listitem> | |
540 | <para>Sets the number of transmit channels (a number between 1 and 4294967295).</para> | |
541 | </listitem> | |
542 | </varlistentry> | |
543 | <varlistentry> | |
544 | <term><varname>OtherChannels=</varname></term> | |
545 | <listitem> | |
546 | <para>Sets the number of other channels (a number between 1 and 4294967295).</para> | |
547 | </listitem> | |
548 | </varlistentry> | |
549 | <varlistentry> | |
550 | <term><varname>CombinedChannels=</varname></term> | |
551 | <listitem> | |
552 | <para>Sets the number of combined set channels (a number between 1 and 4294967295).</para> | |
553 | </listitem> | |
554 | </varlistentry> | |
798d3a52 ZJS |
555 | </variablelist> |
556 | </refsect1> | |
1ff28eae | 557 | |
798d3a52 | 558 | <refsect1> |
b97e7fab LP |
559 | <title>Examples</title> |
560 | ||
561 | <example> | |
562 | <title>/usr/lib/systemd/network/99-default.link</title> | |
563 | ||
564 | <para>The link file <filename>99-default.link</filename> that is | |
565 | shipped with systemd defines the default naming policy for | |
566 | links.</para> | |
567 | ||
568 | <programlisting>[Link] | |
569 | NamePolicy=kernel database onboard slot path | |
570 | MACAddressPolicy=persistent</programlisting> | |
571 | </example> | |
572 | ||
573 | <example> | |
574 | <title>/etc/systemd/network/10-dmz.link</title> | |
575 | ||
576 | <para>This example assigns the fixed name | |
577 | <literal>dmz0</literal> to the interface with the MAC address | |
578 | 00:a0:de:63:7a:e6:</para> | |
579 | ||
580 | <programlisting>[Match] | |
581 | MACAddress=00:a0:de:63:7a:e6 | |
582 | ||
583 | [Link] | |
584 | Name=dmz0</programlisting> | |
585 | </example> | |
586 | ||
587 | <example> | |
588 | <title>/etc/systemd/network/10-internet.link</title> | |
589 | ||
590 | <para>This example assigns the fixed name | |
591 | <literal>internet0</literal> to the interface with the device | |
592 | path <literal>pci-0000:00:1a.0-*</literal>:</para> | |
593 | ||
594 | <programlisting>[Match] | |
595 | Path=pci-0000:00:1a.0-* | |
596 | ||
597 | [Link] | |
598 | Name=internet0</programlisting> | |
599 | </example> | |
600 | ||
798d3a52 | 601 | <example> |
6c1695be | 602 | <title>/etc/systemd/network/25-wireless.link</title> |
1ff28eae | 603 | |
b97e7fab LP |
604 | <para>Here's an overly complex example that shows the use of a large number of [Match] and [Link] settings.</para> |
605 | ||
798d3a52 | 606 | <programlisting>[Match] |
7abaad1a | 607 | MACAddress=12:34:56:78:9a:bc |
608 | Driver=brcmsmac | |
609 | Path=pci-0000:02:00.0-* | |
610 | Type=wlan | |
611 | Virtualization=no | |
612 | Host=my-laptop | |
613 | Architecture=x86-64 | |
1ff28eae | 614 | |
7abaad1a | 615 | [Link] |
616 | Name=wireless0 | |
617 | MTUBytes=1450 | |
618 | BitsPerSecond=10M | |
619 | WakeOnLan=magic | |
620 | MACAddress=cb:a9:87:65:43:21</programlisting> | |
798d3a52 ZJS |
621 | </example> |
622 | </refsect1> | |
1ff28eae | 623 | |
798d3a52 ZJS |
624 | <refsect1> |
625 | <title>See Also</title> | |
626 | <para> | |
627 | <citerefentry> | |
628 | <refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum> | |
629 | </citerefentry>, | |
630 | <citerefentry> | |
631 | <refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum> | |
632 | </citerefentry>, | |
633 | <citerefentry> | |
634 | <refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum> | |
635 | </citerefentry>, | |
636 | <citerefentry> | |
637 | <refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum> | |
638 | </citerefentry> | |
639 | </para> | |
640 | </refsect1> | |
1ff28eae TG |
641 | |
642 | </refentry> |