mirror of
https://github.com/clearlinux/systemd-stable.git
synced 2026-09-04 04:31:27 +00:00
Tom Gundersen
f096a48e21
We will happily use bridges/bonds as master devices, but we will not change their settings if they were created by
someone else.
(cherry picked from commit 7c1cff4ff7)
512 lines
26 KiB
XML
512 lines
26 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2013 Tom Gundersen
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="systemd.netdev" conditional='ENABLE_NETWORKD'>
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<refentryinfo>
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<title>systemd.network</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Tom</firstname>
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<surname>Gundersen</surname>
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<email>teg@jklm.no</email>
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</author>
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</authorgroup>
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</refentryinfo>
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||
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||
<refmeta>
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||
<refentrytitle>systemd.netdev</refentrytitle>
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||
<manvolnum>5</manvolnum>
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</refmeta>
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||
|
||
<refnamediv>
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||
<refname>systemd.netdev</refname>
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<refpurpose>Virtual Network Device configuration</refpurpose>
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</refnamediv>
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|
||
<refsynopsisdiv>
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<para><filename><replaceable>netdev</replaceable>.netdev</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>Network setup is performed by
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<citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
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</para>
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<para>Virtual Network Device files must have the extension
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<filename>.netdev</filename>; other extensions are ignored. Virtual
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network devices are created as soon as networkd is started. If a netdev
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with the specified name already exists, networkd will use that as-is
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rather than create its own. Note that the settings of the pre-existing
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netdev will not be changed by networkd.</para>
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<para>The <filename>.netdev</filename> files are read from the files located in the
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system network directory <filename>/usr/lib/systemd/network</filename>,
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the volatile runtime network directory
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<filename>/run/systemd/network</filename> and the local administration
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network directory <filename>/etc/systemd/network</filename>.
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All configuration files are collectively sorted and processed in lexical order,
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regardless of the directories in which they live. However, files with
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identical filenames replace each other. Files in
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<filename>/etc</filename> have the highest priority, files in
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<filename>/run</filename> take precedence over files with the same
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name in <filename>/usr/lib</filename>. This can be used to override a
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||
system-supplied configuration file with a local file if needed; a symlink in
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<filename>/etc</filename> with the same name as a configuration file in
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<filename>/usr/lib</filename>, pointing to <filename>/dev/null</filename>,
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disables the configuration file entirely.</para>
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|
||
</refsect1>
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||
|
||
<refsect1>
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<title>[Match] Section Options</title>
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||
<para>A virtual network device is only created if the
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<literal>[Match]</literal> section matches the current
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environment, or if the section is empty. The following keys are accepted:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Host=</varname></term>
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<listitem>
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<para>Matches against the hostname or machine ID of the
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host. See <literal>ConditionHost=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Virtualization=</varname></term>
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<listitem>
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<para>Checks whether the system is executed in a virtualized
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environment and optionally test whether it is a specific
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implementation. See <literal>ConditionVirtualization=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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||
</varlistentry>
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||
<varlistentry>
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||
<term><varname>KernelCommandLine=</varname></term>
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<listitem>
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||
<para>Checks whether a specific kernel command line option is
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set (or if prefixed with the exclamation mark unset). See
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<literal>ConditionKernelCommandLine=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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</varlistentry>
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||
<varlistentry>
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<term><varname>Architecture=</varname></term>
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<listitem>
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||
<para>Checks whether the system is running on a specific
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architecture. See <literal>ConditionArchitecture=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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||
</varlistentry>
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</variablelist>
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|
||
</refsect1>
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|
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<refsect1>
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<title>[NetDev] Section Options</title>
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<para>The <literal>[NetDev]</literal> section accepts the following
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keys:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Description=</varname></term>
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<listitem>
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<para>A free-form description of the netdev.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Name=</varname></term>
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<listitem>
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<para>The interface name used when creating the
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netdev. This option is compulsory.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Kind=</varname></term>
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<listitem>
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<para>The netdev kind. Currently, <literal>bridge</literal>,
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<literal>bond</literal>, <literal>vlan</literal>,
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<literal>macvlan</literal>, <literal>vxlan</literal>,
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<literal>ipip</literal>, <literal>gre</literal>,
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<literal>sit</literal>, <literal>vti</literal>,
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<literal>veth</literal>, <literal>tun</literal>,
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<literal>tap</literal> and <literal>dummy</literal>
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are supported. This option is compulsory.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>MTUBytes=</varname></term>
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<listitem>
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<para>The maximum transmission unit in bytes to
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set for the device. The usual suffixes K, M, G,
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are supported and are understood to the base of
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1024.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>MACAddress=</varname></term>
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<listitem>
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<para>The MAC address to use for the device.
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If none is given, one is generated based on
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the interface name and the
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[VLAN] Section Options</title>
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<para>The <literal>[VLAN]</literal> section only applies for netdevs of kind <literal>vlan</literal>,
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and accepts the following key:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Id=</varname></term>
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<listitem>
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<para>The VLAN ID to use. An integer in the range 0–4094.
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This option is compulsory.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[MACVLAN] Section Options</title>
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<para>The <literal>[MACVLAN]</literal> section only applies for netdevs of kind
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<literal>macvlan</literal>, and accepts the following key:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Mode=</varname></term>
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<listitem>
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<para>The MACVLAN mode to use. The supported options are
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<literal>private</literal>, <literal>vepa</literal>,
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<literal>bridge</literal> and <literal>passthru</literal>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[VXLAN] Section Options</title>
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<para>The <literal>[VXLAN]</literal> section only applies for netdevs of kind
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<literal>vxlan</literal>, and accepts the following key:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Id=</varname></term>
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<listitem>
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<para>The VXLAN ID to use.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Group=</varname></term>
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<listitem>
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<para>An assigned multicast group IP address.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>TOS=</varname></term>
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<listitem>
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<para>The Type Of Service byte value for a vxlan interface.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>TTL=</varname></term>
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<listitem>
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<para>A fixed Time To Live N on Virtual eXtensible Local Area Network packets.
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N is a number in the range 1-255. 0 is a special value meaning that packets
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inherit the TTL value.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>MacLearning=</varname></term>
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<listitem>
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<para>A boolean. When true, enables dynamic MAC learning
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to discover remote MAC addresses.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[Tunnel] Section Options</title>
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<para>The <literal>[Tunnel]</literal> section only applies for netdevs of kind
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<literal>ipip</literal>, <literal>sit</literal>, <literal>gre</literal> and
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<literal>vti</literal> and accepts the following keys:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Local=</varname></term>
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<listitem>
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<para>A static local address for tunneled packets.
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It must be an address on another interface of this host.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Remote=</varname></term>
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<listitem>
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<para>The remote endpoint of the tunnel.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>TOS=</varname></term>
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<listitem>
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<para>The Type Of Service byte value for a tunnel interface.
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For details about the TOS see the
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<ulink url="http://tools.ietf.org/html/rfc1349">
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Type of Service in the Internet Protocol Suite
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</ulink> document.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>TTL=</varname></term>
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<listitem>
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<para>A fixed Time To Live N on tunneled packets.
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N is a number in the range 1-255. 0 is a special value meaning that packets
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inherit the TTL value. The default value for IPv4 tunnels is: inherit.
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The default value for IPv6 tunnels is: 64.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>DiscoverPathMTU=</varname></term>
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<listitem>
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<para>A boolean. When true, enables Path MTU Discovery on the tunnel.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[Peer] Section Options</title>
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<para>The <literal>[Peer]</literal> section only applies for netdevs of kind <literal>veth</literal>
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and accepts the following key:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Name=</varname></term>
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<listitem>
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<para>The interface name used when creating the netdev.
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This option is compulsory.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>MACAddress=</varname></term>
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<listitem>
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<para>The peer MACAddress, if not set it is generated in the same
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way as the MAC address of the main interface.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[Tun] Section Options</title>
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<para>The <literal>[Tun]</literal> section only applies for netdevs of kind
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<literal>tun</literal>, and accepts the following keys:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>OneQueue=</varname></term>
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<listitem><para>Takes a boolean argument. Configures whether
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all packets are queued at the device (enabled), or a fixed number
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of packets are queued at the device and the rest at the
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<literal>qdisc</literal>. Defaults to <literal>no</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>MultiQueue=</varname></term>
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<listitem><para>Takes a boolean argument. Configures whether to
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use multiple file descriptors (queues) to parallelize packets
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sending and receiving. Defaults to <literal>no</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>PacketInfo=</varname></term>
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<listitem><para>Takes a boolean argument. Configures whether packets
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should be prepened with four extra bytes (two flag bytes and two
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protocol bytes). If disabled it indicates that the packets will be
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pure IP packets. Defaults to <literal>no</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>User=</varname></term>
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<listitem><para>User to grant access to the <filename>/dev/net/tun</filename>
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device.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Group=</varname></term>
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<listitem><para>Group to grant access to the <filename>/dev/net/tun</filename>
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device.</para>
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</listitem>
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||
</varlistentry>
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||
</variablelist>
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||
</refsect1>
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<refsect1>
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<title>[Tap] Section Options</title>
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<para>The <literal>[Tap]</literal> section only applies for netdevs of kind
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<literal>tap</literal>, and accepts the same keys as the
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<literal>[Tun]</literal> section.</para>
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||
</refsect1>
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<refsect1>
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<title>Example</title>
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<example>
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<title>/etc/systemd/network/bridge.netdev</title>
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<programlisting>[NetDev]
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Name=bridge0
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||
Kind=bridge</programlisting>
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||
</example>
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<example>
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<title>/etc/systemd/network/vlan1.netdev</title>
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<programlisting>[Match]
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||
Virtualization=no
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||
[NetDev]
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Name=vlan1
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Kind=vlan
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[VLAN]
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||
Id=1</programlisting>
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||
</example>
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||
<example>
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||
<title>/etc/systemd/network/ipip.netdev</title>
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||
<programlisting>[NetDev]
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||
Name=ipip-tun
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||
Kind=ipip
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MTUBytes=1480
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[Tunnel]
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Local=192.168.223.238
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Remote=192.169.224.239
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TTL=64</programlisting>
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||
</example>
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<example>
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<title>/etc/systemd/network/tap.netdev</title>
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||
<programlisting>[NetDev]
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||
Name=tap-test
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||
Kind=tap
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||
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[Tap]
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||
MultiQueue=true
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||
PacketInfo=true</programlisting> </example>
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||
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||
<example>
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||
<title>/etc/systemd/network/sit.netdev</title>
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||
<programlisting>[NetDev]
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||
Name=sit-tun
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||
Kind=sit
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||
MTUBytes=1480
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[Tunnel]
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Local=10.65.223.238
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Remote=10.65.223.239</programlisting>
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||
</example>
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||
<example>
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||
<title>/etc/systemd/network/gre.netdev</title>
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||
<programlisting>[NetDev]
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||
Name=gre-tun
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||
Kind=gre
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||
MTUBytes=1480
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||
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||
[Tunnel]
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||
Local=10.65.223.238
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Remote=10.65.223.239</programlisting>
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||
</example>
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||
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||
<example>
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||
<title>/etc/systemd/network/vti.netdev</title>
|
||
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||
<programlisting>[NetDev]
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||
Name=vti-tun
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||
Kind=vti
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MTUBytes=1480
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[Tunnel]
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Local=10.65.223.238
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Remote=10.65.223.239</programlisting>
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||
</example>
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||
<example>
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||
<title>/etc/systemd/network/veth.netdev</title>
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||
<programlisting>[NetDev]
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||
Name=veth-test
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||
Kind=veth
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||
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[Peer]
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||
Name=veth-peer</programlisting>
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||
</example>
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||
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<example>
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||
<title>/etc/systemd/network/dummy.netdev</title>
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||
<programlisting>[NetDev]
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||
Name=dummy-test
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||
Kind=dummy
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||
MACAddress=12:34:56:78:9a:bc</programlisting>
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||
</example>
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||
|
||
</refsect1>
|
||
<refsect1>
|
||
<title>See Also</title>
|
||
<para>
|
||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
||
</para>
|
||
</refsect1>
|
||
|
||
</refentry>
|