2014-02-25 18:30:40 +00:00
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<?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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<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.</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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2014-06-27 18:42:36 +00:00
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</refsect1>
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<refsect1>
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<title>[Match] Section Options</title>
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2014-02-25 18:30:40 +00:00
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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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2014-06-27 18:42:36 +00:00
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</refsect1>
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<refsect1>
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<title>[NetDev] Section Options</title>
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2014-02-25 18:30:40 +00:00
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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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2014-07-01 19:38:08 +00:00
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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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2014-02-25 18:30:40 +00:00
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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> are supported. This option
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is compulsory.</para>
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</listitem>
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</varlistentry>
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2014-07-01 19:38:08 +00:00
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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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2014-02-25 18:30:40 +00:00
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</variablelist>
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2014-06-27 18:42:36 +00:00
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</refsect1>
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<refsect1>
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<title>[VLAN] Section Options</title>
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2014-02-25 18:30:40 +00:00
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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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2014-02-25 20:16:17 +00:00
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</variablelist>
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2014-06-27 18:42:36 +00:00
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</refsect1>
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<refsect1>
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<title>[MACVLAN] Section Options</title>
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2014-02-25 20:16:17 +00:00
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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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2014-07-01 19:38:08 +00:00
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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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2014-02-25 18:30:40 +00:00
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2014-07-01 19:38:08 +00:00
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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>
|
|
|
|
|
|
<listitem>
|
|
|
|
|
|
<para>A static local address for tunneled packets.
|
|
|
|
|
|
It must be an address on another interface of this host.</para>
|
|
|
|
|
|
</listitem>
|
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
|
<term><varname>Remote=</varname></term>
|
|
|
|
|
|
<listitem>
|
|
|
|
|
|
<para>The remote endpoint of the tunnel.</para>
|
|
|
|
|
|
</listitem>
|
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
|
<term><varname>TOS=</varname></term>
|
|
|
|
|
|
<listitem>
|
|
|
|
|
|
<para>The Type Of Service byte value for a tunnel interface.
|
|
|
|
|
|
For details about the TOS see the
|
|
|
|
|
|
<ulink url="http://tools.ietf.org/html/rfc1349">
|
|
|
|
|
|
Type of Service in the Internet Protocol Suite
|
|
|
|
|
|
</ulink> document.
|
|
|
|
|
|
</para>
|
|
|
|
|
|
</listitem>
|
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
|
<term><varname>TTL=</varname></term>
|
|
|
|
|
|
<listitem>
|
|
|
|
|
|
<para>A fixed Time To Live N on tunneled packets.
|
|
|
|
|
|
N is a number in the range 1-255. 0 is a special value meaning that packets
|
|
|
|
|
|
inherit the TTL value. The default value for IPv4 tunnels is: inherit.
|
|
|
|
|
|
The default value for IPv6 tunnels is: 64.</para>
|
|
|
|
|
|
</listitem>
|
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
|
<term><varname>DiscoverPathMTU=</varname></term>
|
|
|
|
|
|
<listitem>
|
|
|
|
|
|
<para>A boolean. When true, enables Path MTU Discovery on the tunnel.</para>
|
|
|
|
|
|
</listitem>
|
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
</variablelist>
|
|
|
|
|
|
</refsect1>
|
|
|
|
|
|
<refsect1>
|
|
|
|
|
|
<title>[Peer] Section Options</title>
|
|
|
|
|
|
|
|
|
|
|
|
<para>The <literal>[Peer]</literal> section only applies for netdevs of kind <literal>veth</literal>
|
|
|
|
|
|
and accepts the following key:</para>
|
|
|
|
|
|
|
|
|
|
|
|
<variablelist class='network-directives'>
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
|
<term><varname>Name=</varname></term>
|
|
|
|
|
|
<listitem>
|
|
|
|
|
|
<para>The interface name used when creating the netdev.
|
|
|
|
|
|
This option is compulsory.</para>
|
|
|
|
|
|
</listitem>
|
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
<varlistentry>
|
|
|
|
|
|
<term><varname>MACAddress=</varname></term>
|
|
|
|
|
|
<listitem>
|
|
|
|
|
|
<para>The peer MACAddress, if not set it is generated in the same
|
|
|
|
|
|
way as the MAC address of the main interface.</para>
|
|
|
|
|
|
</listitem>
|
|
|
|
|
|
</varlistentry>
|
|
|
|
|
|
</variablelist>
|
|
|
|
|
|
</refsect1>
|
2014-02-25 18:30:40 +00:00
|
|
|
|
<refsect1>
|
|
|
|
|
|
<title>Example</title>
|
|
|
|
|
|
<example>
|
|
|
|
|
|
<title>/etc/systemd/network/bridge.netdev</title>
|
|
|
|
|
|
|
|
|
|
|
|
<programlisting>[NetDev]
|
|
|
|
|
|
Name=bridge0
|
|
|
|
|
|
Kind=bridge</programlisting>
|
|
|
|
|
|
</example>
|
|
|
|
|
|
|
|
|
|
|
|
<example>
|
|
|
|
|
|
<title>/etc/systemd/network/vlan1.netdev</title>
|
|
|
|
|
|
|
|
|
|
|
|
<programlisting>[Match]
|
|
|
|
|
|
Virtualization=no
|
|
|
|
|
|
|
|
|
|
|
|
[NetDev]
|
|
|
|
|
|
Name=vlan1
|
|
|
|
|
|
Kind=vlan
|
|
|
|
|
|
|
|
|
|
|
|
[VLAN]
|
|
|
|
|
|
Id=1</programlisting>
|
|
|
|
|
|
</example>
|
2014-07-01 19:38:08 +00:00
|
|
|
|
<example>
|
|
|
|
|
|
<title>/etc/systemd/network/ipip.netdev</title>
|
|
|
|
|
|
<programlisting>[NetDev]
|
|
|
|
|
|
Name=ipip-tun
|
|
|
|
|
|
Kind=ipip
|
|
|
|
|
|
MTUBytes=1480
|
|
|
|
|
|
|
|
|
|
|
|
[Tunnel]
|
|
|
|
|
|
Local=192.168.223.238
|
|
|
|
|
|
Remote=192.169.224.239
|
|
|
|
|
|
TTL=64</programlisting>
|
|
|
|
|
|
</example>
|
2014-02-25 18:30:40 +00:00
|
|
|
|
|
2014-07-01 19:38:08 +00:00
|
|
|
|
<example>
|
|
|
|
|
|
<title>/etc/systemd/network/sit.netdev</title>
|
|
|
|
|
|
<programlisting>[NetDev]
|
|
|
|
|
|
Name=sit-tun
|
|
|
|
|
|
Kind=sit
|
|
|
|
|
|
MTUBytes=1480
|
|
|
|
|
|
|
|
|
|
|
|
[Tunnel]
|
|
|
|
|
|
Local=10.65.223.238
|
|
|
|
|
|
Remote=10.65.223.239</programlisting>
|
|
|
|
|
|
</example>
|
2014-02-25 18:30:40 +00:00
|
|
|
|
|
2014-07-01 19:38:08 +00:00
|
|
|
|
<example>
|
|
|
|
|
|
<title>/etc/systemd/network/gre.netdev</title>
|
|
|
|
|
|
<programlisting>[NetDev]
|
|
|
|
|
|
Name=gre-tun
|
|
|
|
|
|
Kind=gre
|
|
|
|
|
|
MTUBytes=1480
|
|
|
|
|
|
|
|
|
|
|
|
[Tunnel]
|
|
|
|
|
|
Local=10.65.223.238
|
|
|
|
|
|
Remote=10.65.223.239</programlisting>
|
|
|
|
|
|
</example>
|
|
|
|
|
|
|
|
|
|
|
|
<example>
|
|
|
|
|
|
<title>/etc/systemd/network/vti.netdev</title>
|
|
|
|
|
|
|
|
|
|
|
|
<programlisting>[NetDev]
|
|
|
|
|
|
Name=vti-tun
|
|
|
|
|
|
Kind=vti
|
|
|
|
|
|
MTUBytes=1480
|
|
|
|
|
|
|
|
|
|
|
|
[Tunnel]
|
|
|
|
|
|
Local=10.65.223.238
|
|
|
|
|
|
Remote=10.65.223.239</programlisting>
|
|
|
|
|
|
</example>
|
|
|
|
|
|
|
|
|
|
|
|
<example>
|
|
|
|
|
|
<title>/etc/systemd/network/veth.netdev</title>
|
|
|
|
|
|
<programlisting>[NetDev]
|
|
|
|
|
|
Name=veth-test
|
|
|
|
|
|
Kind=veth
|
|
|
|
|
|
|
|
|
|
|
|
[Peer]
|
|
|
|
|
|
Name=veth-peer</programlisting>
|
|
|
|
|
|
</example>
|
|
|
|
|
|
|
|
|
|
|
|
</refsect1>
|
2014-02-25 18:30:40 +00:00
|
|
|
|
<refsect1>
|
|
|
|
|
|
<title>See Also</title>
|
|
|
|
|
|
<para>
|
|
|
|
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
2014-03-17 20:08:40 +00:00
|
|
|
|
<citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
|
|
|
|
<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
2014-02-25 18:30:40 +00:00
|
|
|
|
</para>
|
|
|
|
|
|
</refsect1>
|
|
|
|
|
|
|
|
|
|
|
|
</refentry>
|
