mirror of
https://github.com/systemd/systemd.git
synced 2024-12-02 23:03:50 +08:00
698 lines
27 KiB
XML
698 lines
27 KiB
XML
<?xml version='1.0'?>
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
|
|
<!--
|
|
SPDX-License-Identifier: LGPL-2.1+
|
|
-->
|
|
|
|
<refentry id="systemd.link">
|
|
<refentryinfo>
|
|
<title>systemd.link</title>
|
|
<productname>systemd</productname>
|
|
</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
|
|
<command>net_setup_link</command> 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.
|
|
As a special case, an empty file (file size 0) or symlink with the
|
|
same name pointing to <filename>/dev/null</filename> disables the
|
|
configuration file entirely (it is "masked").</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, as well as 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. Note
|
|
that a default file <filename>99-default.link</filename> is
|
|
shipped by the system. Any user-supplied
|
|
<filename>.link</filename> should hence have a lexically earlier
|
|
name to be considered at all.</para>
|
|
|
|
<para>See
|
|
<citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
for diagnosing problems with <filename>.link</filename> files.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>[Match] Section Options</title>
|
|
|
|
<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>A whitespace-separated list of hardware addresses. Use full colon-, hyphen- or dot-delimited hexadecimal. See the example below.
|
|
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
|
|
of hardware addresses defined prior to this is reset.</para>
|
|
|
|
<para>Example:
|
|
<programlisting>MACAddress=01:23:45:67:89:ab 00-11-22-33-44-55 AABB.CCDD.EEFF</programlisting></para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>OriginalName=</varname></term>
|
|
<listitem>
|
|
<para>A whitespace-separated list of shell-style globs matching
|
|
the device name, as exposed by the udev property
|
|
"INTERFACE". This cannot be used to match on names that have
|
|
already been changed from userspace. Caution is advised when matching on
|
|
kernel-assigned names, as they are known to be unstable
|
|
between reboots.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>Path=</varname></term>
|
|
<listitem>
|
|
<para>A whitespace-separated list of shell-style globs matching
|
|
the persistent path, as exposed by the udev property
|
|
<literal>ID_PATH</literal>.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>Driver=</varname></term>
|
|
<listitem>
|
|
<para>A whitespace-separated list of shell-style globs matching
|
|
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>A whitespace-separated list of shell-style globs matching
|
|
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>KernelVersion=</varname></term>
|
|
<listitem>
|
|
<para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a certain
|
|
expression (or if prefixed with the exclamation mark does not match it). See
|
|
<literal>ConditionKernelVersion=</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>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>[Link] Section Options</title>
|
|
|
|
<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 if it 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. This feature depends on ID_NET_NAME_*
|
|
properties to exist for the link. On hardware where these
|
|
properties are not set, the generation of a persistent MAC address
|
|
will fail.</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. Either way, the random address will have the
|
|
<literal>unicast</literal> and
|
|
<literal>locally administered</literal> bits set.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>none</literal></term>
|
|
<listitem>
|
|
<para>Keeps the MAC address assigned by the kernel.</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 command line.
|
|
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>. If the name has already been set by
|
|
userspace, no renaming is performed. The available policies
|
|
are:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><literal>kernel</literal></term>
|
|
<listitem>
|
|
<para>If the kernel claims that the name it has set
|
|
for a device is predictable, then no renaming is
|
|
performed.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<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>
|
|
|
|
<para>Note that specifying a name that the kernel might use for another
|
|
interface (for example <literal>eth0</literal>) is dangerous because the
|
|
name assignment done by udev will race with the assignment done by the
|
|
kernel, and only one interface may use the name. Depending on the order of
|
|
operations, either udev or the kernel will win, making the naming
|
|
unpredictable. It is best to use some different prefix, for example
|
|
<literal>internal0</literal>/<literal>external0</literal> or
|
|
<literal>lan0</literal>/<literal>lan1</literal>/<literal>lan3</literal>.
|
|
</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>AutoNegotiation=</varname></term>
|
|
<listitem>
|
|
<para>Takes a boolean. If set to yes, automatic negotiation of transmission parameters is enabled.
|
|
Autonegotiation is a procedure by which two connected ethernet devices choose
|
|
common transmission parameters, such as speed, duplex mode, and flow control.
|
|
When unset, the kernel's default will be used.</para>
|
|
|
|
<para>Note that if autonegotiation is enabled, speed, duplex and advertise settings are
|
|
read-only. If autonegotation is disabled, speed, duplex and advertise settings are writable
|
|
if the driver supports multiple link modes.</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>unicast</literal></term>
|
|
<listitem>
|
|
<para>Wake on unicast messages.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>multicast</literal></term>
|
|
<listitem>
|
|
<para>Wake on multicast messages.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>broadcast</literal></term>
|
|
<listitem>
|
|
<para>Wake on broadcast messages.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>arp</literal></term>
|
|
<listitem>
|
|
<para>Wake on ARP.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>magic</literal></term>
|
|
<listitem>
|
|
<para>Wake on receipt of a magic packet.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>secureon</literal></term>
|
|
<listitem>
|
|
<para>Enable secureon(tm) password for MagicPacket(tm).
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>off</literal></term>
|
|
<listitem>
|
|
<para>Never wake.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
<para>Defaults to <literal>off</literal>.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>Port=</varname></term>
|
|
<listitem>
|
|
<para>The port option is used to select the device port. The
|
|
supported values are:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><literal>tp</literal></term>
|
|
<listitem>
|
|
<para>An Ethernet interface using Twisted-Pair cable as the medium.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>aui</literal></term>
|
|
<listitem>
|
|
<para>Attachment Unit Interface (AUI). Normally used with hubs.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>bnc</literal></term>
|
|
<listitem>
|
|
<para>An Ethernet interface using BNC connectors and co-axial cable.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>mii</literal></term>
|
|
<listitem>
|
|
<para>An Ethernet interface using a Media Independent Interface (MII).</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><literal>fibre</literal></term>
|
|
<listitem>
|
|
<para>An Ethernet interface using Optical Fibre as the medium.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>Advertise=</varname></term>
|
|
<listitem>
|
|
<para>This sets what speeds and duplex modes of operation are advertised for auto-negotiation.
|
|
The supported values are:
|
|
|
|
<table>
|
|
<title>Supported advertise values</title>
|
|
<tgroup cols='3'>
|
|
<colspec colname='Advertise' />
|
|
<colspec colname='Speed' />
|
|
<colspec colname='Duplex Mode' />
|
|
|
|
<thead><row>
|
|
<entry>Advertise</entry>
|
|
<entry>Speed (Mbps)</entry>
|
|
<entry>Duplex Mode</entry>
|
|
</row></thead>
|
|
<tbody>
|
|
|
|
<row><entry><literal>10baset-half</literal></entry>
|
|
<entry>10</entry><entry>half</entry></row>
|
|
|
|
<row><entry><literal>10baset-full</literal></entry>
|
|
<entry>10</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>100baset-half</literal></entry>
|
|
<entry>100</entry><entry>half</entry></row>
|
|
|
|
<row><entry><literal>100baset-full</literal></entry>
|
|
<entry>100</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>1000baset-half</literal></entry>
|
|
<entry>1000</entry><entry>half</entry></row>
|
|
|
|
<row><entry><literal>1000baset-full</literal></entry>
|
|
<entry>1000</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>10000baset-full</literal></entry>
|
|
<entry>10000</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>2500basex-full</literal></entry>
|
|
<entry>2500</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>1000basekx-full</literal></entry>
|
|
<entry>1000</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>10000basekx4-full</literal></entry>
|
|
<entry>10000</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>10000basekr-full</literal></entry>
|
|
<entry>10000</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>10000baser-fec</literal></entry>
|
|
<entry>10000</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>20000basemld2-full</literal></entry>
|
|
<entry>20000</entry><entry>full</entry></row>
|
|
|
|
<row><entry><literal>20000basekr2-full</literal></entry>
|
|
<entry>20000</entry><entry>full</entry></row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
|
|
By default this is unset, i.e. all possible modes will be advertised.
|
|
This option may be specified more than once, in which case all specified speeds and modes are advertised.
|
|
If the empty string is assigned to this option, the list is reset, and all prior assignments have no effect.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>TCPSegmentationOffload=</varname></term>
|
|
<listitem>
|
|
<para>Takes a boolean. If set to true, the TCP Segmentation Offload (TSO) is enabled.
|
|
When unset, the kernel's default will be used.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>TCP6SegmentationOffload=</varname></term>
|
|
<listitem>
|
|
<para>Takes a boolean. If set to true, the TCP6 Segmentation Offload (tx-tcp6-segmentation) is enabled.
|
|
When unset, the kernel's default will be used.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>GenericSegmentationOffload=</varname></term>
|
|
<listitem>
|
|
<para>Takes a boolean. If set to true, the Generic Segmentation Offload (GSO) is enabled.
|
|
When unset, the kernel's default will be used.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>GenericReceiveOffload=</varname></term>
|
|
<listitem>
|
|
<para>Takes a boolean. If set to true, the Generic Receive Offload (GRO) is enabled.
|
|
When unset, the kernel's default will be used.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>LargeReceiveOffload=</varname></term>
|
|
<listitem>
|
|
<para>Takes a boolean. If set to true, the Large Receive Offload (LRO) is enabled.
|
|
When unset, the kernel's default will be used.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>RxChannels=</varname></term>
|
|
<listitem>
|
|
<para>Sets the number of receive channels (a number between 1 and 4294967295) .</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>TxChannels=</varname></term>
|
|
<listitem>
|
|
<para>Sets the number of transmit channels (a number between 1 and 4294967295).</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>OtherChannels=</varname></term>
|
|
<listitem>
|
|
<para>Sets the number of other channels (a number between 1 and 4294967295).</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>CombinedChannels=</varname></term>
|
|
<listitem>
|
|
<para>Sets the number of combined set channels (a number between 1 and 4294967295).</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Examples</title>
|
|
|
|
<example>
|
|
<title>/usr/lib/systemd/network/99-default.link</title>
|
|
|
|
<para>The link file <filename>99-default.link</filename> that is
|
|
shipped with systemd defines the default naming policy for
|
|
links.</para>
|
|
|
|
<programlisting>[Link]
|
|
NamePolicy=kernel database onboard slot path
|
|
MACAddressPolicy=persistent</programlisting>
|
|
</example>
|
|
|
|
<example>
|
|
<title>/etc/systemd/network/10-dmz.link</title>
|
|
|
|
<para>This example assigns the fixed name
|
|
<literal>dmz0</literal> to the interface with the MAC address
|
|
00:a0:de:63:7a:e6:</para>
|
|
|
|
<programlisting>[Match]
|
|
MACAddress=00:a0:de:63:7a:e6
|
|
|
|
[Link]
|
|
Name=dmz0</programlisting>
|
|
</example>
|
|
|
|
<example>
|
|
<title>/etc/systemd/network/10-internet.link</title>
|
|
|
|
<para>This example assigns the fixed name
|
|
<literal>internet0</literal> to the interface with the device
|
|
path <literal>pci-0000:00:1a.0-*</literal>:</para>
|
|
|
|
<programlisting>[Match]
|
|
Path=pci-0000:00:1a.0-*
|
|
|
|
[Link]
|
|
Name=internet0</programlisting>
|
|
</example>
|
|
|
|
<example>
|
|
<title>/etc/systemd/network/25-wireless.link</title>
|
|
|
|
<para>Here's an overly complex example that shows the use of a large number of [Match] and [Link] settings.</para>
|
|
|
|
<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>,
|
|
<citerefentry>
|
|
<refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum>
|
|
</citerefentry>,
|
|
<citerefentry>
|
|
<refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum>
|
|
</citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|