[thirdparty/systemd.git] / man / systemd.link.xml

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  Copyright 2014 Tom Gundersen

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
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  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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  You should have received a copy of the GNU Lesser General Public License
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<refentry id="systemd.link">
        <refentryinfo>
                <title>systemd.link</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Tom</firstname>
                                <surname>Gundersen</surname>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>systemd.link</refentrytitle>
                <manvolnum>5</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd.link</refname>
                <refpurpose>Network device configuration</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <para><filename><replaceable>link</replaceable>.link</filename></para>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para>Network link configuration is performed by the <literal>net_setup_link</literal>
                udev builtin.</para>

                <para>The link files are read from the files located in the
                system network directory <filename>/usr/lib/systemd/network</filename>,
                the volatile runtime network directory <filename>/run/systemd/network</filename>
                and the local administration network directory <filename>/etc/systemd/network</filename>.
                Link files must have the extension <filename>.link</filename>; other extensions are ignored.
                All link files are collectively sorted and processed in lexical order,
                regardless of the directories in which they live. However, files with
                identical filenames replace each other. Files in <filename>/etc</filename>
                have the highest priority, files in <filename>/run</filename> take precedence
                over files with the same name in <filename>/usr/lib</filename>. This can be
                used to override a system-supplied link file with a local file if needed;
                a symlink in <filename>/etc</filename> with the same name as a link file in
                <filename>/usr/lib</filename>, pointing to <filename>/dev/null</filename>,
                disables the link file entirely.</para>

                <para>The link file contains a <literal>[Match]</literal> section, which
                determines if a given link file may be applied to a given device; and a
                <literal>[Link]</literal> section specifying how the device should be
                configured. The first (in lexical order) of the link files that matches
                a given device is applied.</para>

                <para>A link file is said to match a device if each of the entries in the
                <literal>[Match]</literal> section matches, or if the section is empty.
                The following keys are accepted:</para>

                <variablelist class='network-directives'>
                        <varlistentry>
                                <term><varname>MACAddress=</varname></term>
                                <listitem>
                                        <para>The hardware address.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Path=</varname></term>
                                <listitem>
                                <para>The persistent path, as exposed by the
                                udev property <literal>ID_PATH</literal>. May
                                contain shell style globs.</para>
                        </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Driver=</varname></term>
                                <listitem>
                                        <para>The driver currently bound to the device,
                                        as exposed by the udev property <literal>DRIVER</literal>
                                        of its parent device, or if that is not set the
                                        driver as exposed by <literal>ethtool -i</literal>
                                        of the device itself.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Type=</varname></term>
                                <listitem>
                                        <para>The device type, as exposed by the udev
                                        property <literal>DEVTYPE</literal>.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Host=</varname></term>
                                <listitem>
                                        <para>Matches against the hostname or machine
                                        ID of the host. See <literal>ConditionHost=</literal> in
                                        <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                                        for details.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Virtualization=</varname></term>
                                <listitem>
                                        <para>Checks whether the system is executed in
                                        a virtualized environment and optionally test
                                        whether it is a specific implementation. See
                                        <literal>ConditionVirtualization=</literal> in
                                        <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                                        for details.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>KernelCommandLine=</varname></term>
                                <listitem>
                                        <para>Checks whether a specific kernel command
                                        line option is set (or if prefixed with the
                                        exclamation mark unset). See
                                        <literal>ConditionKernelCommandLine=</literal> in
                                        <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                                        for details.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Architecture=</varname></term>
                                <listitem>
                                        <para>Checks whether the system is running on a
                                        specific architecture. See
                                        <literal>ConditionArchitecture=</literal> in
                                        <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                                        for details.</para>
                                </listitem>
                        </varlistentry>
                </variablelist>

                <para>The <literal>[Link]</literal> section accepts the following
                keys:</para>

                <variablelist class='network-directives'>
                        <varlistentry>
                                <term><varname>Description=</varname></term>
                                <listitem>
                                        <para>A description of the device.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Alias=</varname></term>
                                <listitem>
                                        <para>The <literal>ifalias</literal> is set to
                                        this value.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>MACAddressPolicy=</varname></term>
                                <listitem>
                                        <para>The policy by which the MAC address
                                        should be set. The available policies are:
                                        </para>

                                        <variablelist>
                                                <varlistentry>
                                                        <term><literal>persistent</literal></term>
                                                        <listitem>
                                                                <para>If the hardware has a persistent
                                                                MAC address, as most hardware should,
                                                                and this is used by the kernel, nothing
                                                                is done. Otherwise, a new MAC address
                                                                is generated which is guaranteed to be
                                                                the same on every boot for the given
                                                                machine and the given device, but which
                                                                is otherwise random.</para>
                                                        </listitem>
                                                </varlistentry>
                                                <varlistentry>
                                                        <term><literal>random</literal></term>
                                                        <listitem>
                                                                <para>If the kernel is using a random MAC
                                                                address, nothing is done. Otherwise, a new
                                                                address is randomly generated each time the
                                                                device appears, typically at boot.</para>
                                                        </listitem>
                                                </varlistentry>
                                        </variablelist>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>MACAddress=</varname></term>
                                <listitem>
                                        <para>The MAC address to use, if no
                                        <literal>MACAddressPolicy=</literal>
                                        is specified.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>NamePolicy=</varname></term>
                                <listitem>
                                        <para>An ordered, space-separated list of
                                        policies by which the interface name should
                                        be set. <literal>NamePolicy</literal> may be
                                        disabled by specifying
                                        <literal>net.ifnames=0</literal> on the kernel
                                        commandline. Each of the policies may fail, and
                                        the first successful one is used. The name is
                                        not set directly, but is exported to udev as
                                        the property <literal>ID_NET_NAME</literal>,
                                        which is, by default, used by a udev rule to set
                                        <literal>NAME</literal>. The available policies
                                        are:</para>

                                        <variablelist>
                                                <varlistentry>
                                                        <term><literal>database</literal></term>
                                                        <listitem>
                                                                <para>The name is set based on entries in
                                                                the udev's Hardware Database with the key
                                                                <literal>ID_NET_NAME_FROM_DATABASE</literal>
                                                                .</para>
                                                        </listitem>
                                                </varlistentry>
                                                <varlistentry>
                                                        <term><literal>onboard</literal></term>
                                                        <listitem>
                                                                <para>The name is set based on information given by
                                                                the firmware for on-board devices, as exported by
                                                                the udev property <literal>ID_NET_NAME_ONBOARD</literal>
                                                                .</para>
                                                        </listitem>
                                                </varlistentry>
                                                <varlistentry>
                                                        <term><literal>slot</literal></term>
                                                        <listitem>
                                                                <para>The name is set based on information given by
                                                                the firmware for hot-plug devices, as exported by
                                                                the udev property <literal>ID_NET_NAME_SLOT</literal>
                                                                .</para>
                                                        </listitem>
                                                </varlistentry>
                                                <varlistentry>
                                                        <term><literal>path</literal></term>
                                                        <listitem>
                                                                <para>The name is set based on the device's physical
                                                                location, as exported by the udev property
                                                                <literal>ID_NET_NAME_PATH</literal>.</para>
                                                        </listitem>
                                                </varlistentry>
                                                <varlistentry>
                                                        <term><literal>mac</literal></term>
                                                        <listitem>
                                                                <para>The name is set based on the device's
                                                                persistent MAC address, as exported by the udev
                                                                property <literal>ID_NET_NAME_MAC</literal>.</para>
                                                        </listitem>
                                                </varlistentry>
                                        </variablelist>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Name=</varname></term>
                                <listitem>
                                        <para>The interface name to use in case all the
                                        policies specified in
                                        <varname>NamePolicy=</varname> fail, or in case
                                        <varname>NamePolicy=</varname> is missing or
                                        disabled.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>MTUBytes=</varname></term>
                                <listitem>
                                        <para>The maximum transmission unit in bytes to
                                        set for the device. The usual suffixes K, M, G,
                                        are supported and are understood to the base of
                                        1024.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>BitsPerSecond=</varname></term>
                                <listitem>
                                        <para>The speed to set for the device, the
                                        value is rounded down to the nearest Mbps.
                                        The usual suffixes K, M, G, are supported and
                                        are understood to the base of 1000.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>Duplex=</varname></term>
                                <listitem>
                                        <para>The duplex mode to set for the device.
                                        The accepted values are <literal>half</literal>
                                        and <literal>full</literal>.</para>
                                </listitem>
                        </varlistentry>
                        <varlistentry>
                                <term><varname>WakeOnLan=</varname></term>
                                <listitem>
                                        <para>The Wake-on-LAN policy to set for the
                                        device. The supported values are:</para>

                                        <variablelist>
                                                <varlistentry>
                                                        <term><literal>phy</literal></term>
                                                        <listitem>
                                                                <para>Wake on PHY activity.</para>
                                                        </listitem>
                                                </varlistentry>
                                                <varlistentry>
                                                        <term><literal>magic</literal></term>
                                                        <listitem>
                                                                <para>Wake on receipt of a magic packet
                                                                </para>
                                                        </listitem>
                                                </varlistentry>
                                                <varlistentry>
                                                        <term><literal>off</literal></term>
                                                        <listitem>
                                                                <para>Never wake.</para>
                                                        </listitem>
                                                </varlistentry>
                                        </variablelist>
                                </listitem>
                        </varlistentry>
                </variablelist>
        </refsect1>

        <refsect1>
                <title>Example</title>
                <example>
                        <title>/etc/systemd/network/wireless.link</title>

                        <programlisting>[Match]
MACAddress=12:34:56:78:9a:bc
Driver=brcmsmac
Path=pci-0000:02:00.0-*
Type=wlan
Virtualization=no
Host=my-laptop
Architecture=x86-64

[Link]
Name=wireless0
MTUBytes=1450
BitsPerSecond=10M
WakeOnLan=magic
MACAddress=cb:a9:87:65:43:21</programlisting>
                </example>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry>
                                <refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum>
                        </citerefentry>,
                        <citerefentry>
                                <refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum>
                        </citerefentry>
                </para>
        </refsect1>

</refentry>
Commit	Line	Data
1ff28eae TG	1	<?xml version='1.0'?> <!---nxml--->
	2	<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
	3	<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
	4	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
	5
	6	<!--
	7	This file is part of systemd.
	8
	9	Copyright 2014 Tom Gundersen
	10
	11	systemd is free software; you can redistribute it and/or modify it
	12	under the terms of the GNU Lesser General Public License as published by
	13	the Free Software Foundation; either version 2.1 of the License, or
	14	(at your option) any later version.
	15
	16	systemd is distributed in the hope that it will be useful, but
	17	WITHOUT ANY WARRANTY; without even the implied warranty of
	18	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	19	Lesser General Public License for more details.
	20
	21	You should have received a copy of the GNU Lesser General Public License
	22	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	23	-->
	24
	25	<refentry id="systemd.link">
	26	<refentryinfo>
	27	<title>systemd.link</title>
	28	<productname>systemd</productname>
	29
	30	<authorgroup>
	31	<author>
	32	<contrib>Developer</contrib>
	33	<firstname>Tom</firstname>
	34	<surname>Gundersen</surname>
	35	</author>
	36	</authorgroup>
	37	</refentryinfo>
	38
	39	<refmeta>
	40	<refentrytitle>systemd.link</refentrytitle>
	41	<manvolnum>5</manvolnum>
	42	</refmeta>
	43
	44	<refnamediv>
	45	<refname>systemd.link</refname>
	46	<refpurpose>Network device configuration</refpurpose>
	47	</refnamediv>
	48
	49	<refsynopsisdiv>
	50	<para><filename><replaceable>link</replaceable>.link</filename></para>
	51	</refsynopsisdiv>
	52
	53	<refsect1>
	54	<title>Description</title>
	55
	56	<para>Network link configuration is performed by the <literal>net_setup_link</literal>
	57	udev builtin.</para>
	58
	59	<para>The link files are read from the files located in the
	60	system network directory <filename>/usr/lib/systemd/network</filename>,
	61	the volatile runtime network directory <filename>/run/systemd/network</filename>
	62	and the local administration network directory <filename>/etc/systemd/network</filename>.
	63	Link files must have the extension <filename>.link</filename>; other extensions are ignored.
	64	All link files are collectively sorted and processed in lexical order,
65	regardless of the directories in which they live. However, files with
66	identical filenames replace each other. Files in <filename>/etc</filename>
67	have the highest priority, files in <filename>/run</filename> take precedence
68	over files with the same name in <filename>/usr/lib</filename>. This can be
69	used to override a system-supplied link file with a local file if needed;
70	a symlink in <filename>/etc</filename> with the same name as a link file in
71	<filename>/usr/lib</filename>, pointing to <filename>/dev/null</filename>,
72	disables the link file entirely.</para>
73
74	<para>The link file contains a <literal>[Match]</literal> section, which
75	determines if a given link file may be applied to a given device; and a
76	<literal>[Link]</literal> section specifying how the device should be
77	configured. The first (in lexical order) of the link files that matches
78	a given device is applied.</para>
79
80	<para>A link file is said to match a device if each of the entries in the
81	<literal>[Match]</literal> section matches, or if the section is empty.
82	The following keys are accepted:</para>
83
84	<variablelist class='network-directives'>
85	<varlistentry>
86	<term><varname>MACAddress=</varname></term>
87	<listitem>
88	<para>The hardware address.</para>
89	</listitem>
90	</varlistentry>
91	<varlistentry>
92	<term><varname>Path=</varname></term>
93	<listitem>
94	<para>The persistent path, as exposed by the
95	udev property <literal>ID_PATH</literal>. May
96	contain shell style globs.</para>
97	</listitem>
98	</varlistentry>
99	<varlistentry>
100	<term><varname>Driver=</varname></term>
101	<listitem>
102	<para>The driver currently bound to the device,
103	as exposed by the udev property <literal>DRIVER</literal>
104	of its parent device, or if that is not set the
105	driver as exposed by <literal>ethtool -i</literal>
106	of the device itself.</para>
107	</listitem>
108	</varlistentry>
109	<varlistentry>
110	<term><varname>Type=</varname></term>
111	<listitem>
112	<para>The device type, as exposed by the udev
113	property <literal>DEVTYPE</literal>.</para>
114	</listitem>
115	</varlistentry>
116	<varlistentry>
117	<term><varname>Host=</varname></term>
118	<listitem>
119	<para>Matches against the hostname or machine
120	ID of the host. See <literal>ConditionHost=</literal> in
121	<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
122	for details.</para>
123	</listitem>
124	</varlistentry>
125	<varlistentry>
126	<term><varname>Virtualization=</varname></term>
127	<listitem>
128	<para>Checks whether the system is executed in
129	a virtualized environment and optionally test
130	whether it is a specific implementation. See
131	<literal>ConditionVirtualization=</literal> in
132	<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
133	for details.</para>
134	</listitem>
135	</varlistentry>
136	<varlistentry>
137	<term><varname>KernelCommandLine=</varname></term>
138	<listitem>
139	<para>Checks whether a specific kernel command
140	line option is set (or if prefixed with the
141	exclamation mark unset). See
142	<literal>ConditionKernelCommandLine=</literal> in
143	<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
144	for details.</para>
145	</listitem>
146	</varlistentry>
147	<varlistentry>
148	<term><varname>Architecture=</varname></term>
149	<listitem>
150	<para>Checks whether the system is running on a
151	specific architecture. See
152	<literal>ConditionArchitecture=</literal> in
153	<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
154	for details.</para>
155	</listitem>
156	</varlistentry>
157	</variablelist>
158
159	<para>The <literal>[Link]</literal> section accepts the following
160	keys:</para>
161
162	<variablelist class='network-directives'>
163	<varlistentry>
164	<term><varname>Description=</varname></term>
165	<listitem>
166	<para>A description of the device.</para>
167	</listitem>
168	</varlistentry>
169	<varlistentry>
170	<term><varname>Alias=</varname></term>
171	<listitem>
172	<para>The <literal>ifalias</literal> is set to
173	this value.</para>
174	</listitem>
175	</varlistentry>
176	<varlistentry>
177	<term><varname>MACAddressPolicy=</varname></term>
178	<listitem>
179	<para>The policy by which the MAC address
180	should be set. The available policies are:
181	</para>
182
183	<variablelist>
184	<varlistentry>
185	<term><literal>persistent</literal></term>
186	<listitem>
187	<para>If the hardware has a persistent
188	MAC address, as most hardware should,
189	and this is used by the kernel, nothing
190	is done. Otherwise, a new MAC address
191	is generated which is guaranteed to be
192	the same on every boot for the given
193	machine and the given device, but which
194	is otherwise random.</para>
195	</listitem>
196	</varlistentry>
197	<varlistentry>
198	<term><literal>random</literal></term>
199	<listitem>
200	<para>If the kernel is using a random MAC
201	address, nothing is done. Otherwise, a new
202	address is randomly generated each time the
203	device appears, typically at boot.</para>
204	</listitem>
205	</varlistentry>
206	</variablelist>
207	</listitem>
208	</varlistentry>
209	<varlistentry>
210	<term><varname>MACAddress=</varname></term>
211	<listitem>
212	<para>The MAC address to use, if no
213	<literal>MACAddressPolicy=</literal>
214	is specified.</para>
215	</listitem>
216	</varlistentry>
217	<varlistentry>
218	<term><varname>NamePolicy=</varname></term>
219	<listitem>
220	<para>An ordered, space-separated list of
221	policies by which the interface name should
222	be set. <literal>NamePolicy</literal> may be
223	disabled by specifying
224	<literal>net.ifnames=0</literal> on the kernel
225	commandline. Each of the policies may fail, and
226	the first successful one is used. The name is
227	not set directly, but is exported to udev as
228	the property <literal>ID_NET_NAME</literal>,
229	which is, by default, used by a udev rule to set
230	<literal>NAME</literal>. The available policies
231	are:</para>
232
233	<variablelist>
234	<varlistentry>
235	<term><literal>database</literal></term>
236	<listitem>
237	<para>The name is set based on entries in
238	the udev's Hardware Database with the key
239	<literal>ID_NET_NAME_FROM_DATABASE</literal>
240	.</para>
241	</listitem>
242	</varlistentry>
243	<varlistentry>
244	<term><literal>onboard</literal></term>
245	<listitem>
246	<para>The name is set based on information given by
247	the firmware for on-board devices, as exported by
248	the udev property <literal>ID_NET_NAME_ONBOARD</literal>
249	.</para>
250	</listitem>
251	</varlistentry>
252	<varlistentry>
253	<term><literal>slot</literal></term>
254	<listitem>
255	<para>The name is set based on information given by
256	the firmware for hot-plug devices, as exported by
257	the udev property <literal>ID_NET_NAME_SLOT</literal>
258	.</para>
259	</listitem>
260	</varlistentry>
261	<varlistentry>
262	<term><literal>path</literal></term>
263	<listitem>
264	<para>The name is set based on the device's physical
265	location, as exported by the udev property
266	<literal>ID_NET_NAME_PATH</literal>.</para>
267	</listitem>
268	</varlistentry>
269	<varlistentry>
270	<term><literal>mac</literal></term>
271	<listitem>
272	<para>The name is set based on the device's
273	persistent MAC address, as exported by the udev
274	property <literal>ID_NET_NAME_MAC</literal>.</para>
275	</listitem>
276	</varlistentry>
277	</variablelist>
278	</listitem>
279	</varlistentry>
280	<varlistentry>
281	<term><varname>Name=</varname></term>
282	<listitem>
283	<para>The interface name to use in case all the
284	policies specified in
285	<varname>NamePolicy=</varname> fail, or in case
286	<varname>NamePolicy=</varname> is missing or
287	disabled.</para>
288	</listitem>
289	</varlistentry>
290	<varlistentry>
291	<term><varname>MTUBytes=</varname></term>
292	<listitem>
293	<para>The maximum transmission unit in bytes to
294	set for the device. The usual suffixes K, M, G,
295	are supported and are understood to the base of
296	1024.</para>
297	</listitem>
298	</varlistentry>
299	<varlistentry>
300	<term><varname>BitsPerSecond=</varname></term>
301	<listitem>
302	<para>The speed to set for the device, the
303	value is rounded down to the nearest Mbps.
304	The usual suffixes K, M, G, are supported and
305	are understood to the base of 1000.</para>
306	</listitem>
307	</varlistentry>
308	<varlistentry>
309	<term><varname>Duplex=</varname></term>
310	<listitem>
311	<para>The duplex mode to set for the device.
312	The accepted values are <literal>half</literal>
313	and <literal>full</literal>.</para>
314	</listitem>
315	</varlistentry>
316	<varlistentry>
317	<term><varname>WakeOnLan=</varname></term>
318	<listitem>
319	<para>The Wake-on-LAN policy to set for the
320	device. The supported values are:</para>
321
322	<variablelist>
323	<varlistentry>
324	<term><literal>phy</literal></term>
325	<listitem>
326	<para>Wake on PHY activity.</para>
327	</listitem>
328	</varlistentry>
329	<varlistentry>
330	<term><literal>magic</literal></term>
331	<listitem>
332	<para>Wake on receipt of a magic packet
333	</para>
334	</listitem>
335	</varlistentry>
336	<varlistentry>
337	<term><literal>off</literal></term>
338	<listitem>
339	<para>Never wake.</para>
340	</listitem>
341	</varlistentry>
342	</variablelist>
343	</listitem>
344	</varlistentry>
345	</variablelist>
346	</refsect1>
347
348	<refsect1>
349	<title>Example</title>
350	<example>
351	<title>/etc/systemd/network/wireless.link</title>
352
353	<programlisting>[Match]
354	MACAddress=12:34:56:78:9a:bc
355	Driver=brcmsmac
356	Path=pci-0000:02:00.0-*
357	Type=wlan
358	Virtualization=no
359	Host=my-laptop
360	Architecture=x86-64
361
362	[Link]
363	Name=wireless0
364	MTUBytes=1450
365	BitsPerSecond=10M
366	WakeOnLan=magic
367	MACAddress=cb:a9:87:65:43:21</programlisting>
368	</example>
369	</refsect1>
370
371	<refsect1>
372	<title>See Also</title>
373	<para>
374	<citerefentry>
375	<refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum>
376	</citerefentry>,
377	<citerefentry>
378	<refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum>
379	</citerefentry>
380	</para>
381	</refsect1>
382
383	</refentry>