man/systemd.netdev.xml

   1 <?xml version='1.0'?> <!--*-nxml-*-->
   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
   3         "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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   6   This file is part of systemd.
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   8   Copyright 2013 Tom Gundersen
   9
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  23
  24 <refentry id="systemd.netdev" conditional='ENABLE_NETWORKD'>
  25
  26         <refentryinfo>
  27                 <title>systemd.network</title>
  28                 <productname>systemd</productname>
  29
  30                 <authorgroup>
  31                         <author>
  32                                 <contrib>Developer</contrib>
  33                                 <firstname>Tom</firstname>
  34                                 <surname>Gundersen</surname>
  35                                 <email>teg@jklm.no</email>
  36                         </author>
  37                 </authorgroup>
  38         </refentryinfo>
  39
  40         <refmeta>
  41                 <refentrytitle>systemd.netdev</refentrytitle>
  42                 <manvolnum>5</manvolnum>
  43         </refmeta>
  44
  45         <refnamediv>
  46                 <refname>systemd.netdev</refname>
  47                 <refpurpose>Virtual Network Device configuration</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <para><filename><replaceable>netdev</replaceable>.netdev</filename></para>
  52         </refsynopsisdiv>
  53
  54         <refsect1>
  55                 <title>Description</title>
  56
  57                 <para>Network setup is performed by
  58                 <citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
  59                 </para>
  60
  61                 <para>Virtual Network Device files must have the extension
  62                 <filename>.netdev</filename>; other extensions are ignored. Virtual
  63                 network devices are created as soon as networkd is started.</para>
  64
  65                 <para>The <filename>.netdev</filename> files are read from the files located in the
  66                 system network directory <filename>/usr/lib/systemd/network</filename>,
  67                 the volatile runtime network directory
  68                 <filename>/run/systemd/network</filename> and the local administration
  69                 network directory <filename>/etc/systemd/network</filename>.
  70                 All configuration files are collectively sorted and processed in lexical order,
  71                 regardless of the directories in which they live. However, files with
  72                 identical filenames replace each other. Files in
  73                 <filename>/etc</filename> have the highest priority, files in
  74                 <filename>/run</filename> take precedence over files with the same
  75                 name in <filename>/usr/lib</filename>. This can be used to override a
  76                 system-supplied configuration file with a local file if needed; a symlink in
  77                 <filename>/etc</filename> with the same name as a configuration file in
  78                 <filename>/usr/lib</filename>, pointing to <filename>/dev/null</filename>,
  79                 disables the configuration file entirely.</para>
  80
  81                 <para>A virtual network device is only created if the
  82                 <literal>[Match]</literal> section matches the current
  83                 environment, or if the section is empty. The following keys are accepted:</para>
  84
  85                         <variablelist class='network-directives'>
  86                                 <varlistentry>
  87                                         <term><varname>Host=</varname></term>
  88                                         <listitem>
  89                                                 <para>Matches against the hostname or machine ID of the
  90                                                 host. See <literal>ConditionHost=</literal> in
  91                                                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  92                                                 for details.
  93                                                 </para>
  94                                         </listitem>
  95                                 </varlistentry>
  96                                 <varlistentry>
  97                                         <term><varname>Virtualization=</varname></term>
  98                                         <listitem>
  99                                                 <para>Checks whether the system is executed in a virtualized
 100                                                 environment and optionally test whether it is a specific
 101                                                 implementation. See <literal>ConditionVirtualization=</literal> in
 102                                                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 103                                                 for details.
 104                                                 </para>
 105                                         </listitem>
 106                                 </varlistentry>
 107                                 <varlistentry>
 108                                         <term><varname>KernelCommandLine=</varname></term>
 109                                         <listitem>
 110                                                 <para>Checks whether a specific kernel command line option is
 111                                                 set (or if prefixed with the exclamation mark unset). See
 112                                                 <literal>ConditionKernelCommandLine=</literal> in
 113                                                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 114                                                 for details.
 115                                                 </para>
 116                                         </listitem>
 117                                 </varlistentry>
 118                                 <varlistentry>
 119                                         <term><varname>Architecture=</varname></term>
 120                                         <listitem>
 121                                                 <para>Checks whether the system is running on a specific
 122                                                 architecture. See <literal>ConditionArchitecture=</literal> in
 123                                                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 124                                                 for details.
 125                                                 </para>
 126                                         </listitem>
 127                                 </varlistentry>
 128                         </variablelist>
 129
 130                         <para>The <literal>[NetDev]</literal> section accepts the following
 131                         keys:</para>
 132
 133                         <variablelist class='network-directives'>
 134                                 <varlistentry>
 135                                         <term><varname>Name=</varname></term>
 136                                         <listitem>
 137                                                 <para>The interface name used when creating the
 138                                                 netdev. This option is compulsory.</para>
 139                                         </listitem>
 140                                 </varlistentry>
 141                                 <varlistentry>
 142                                         <term><varname>Kind=</varname></term>
 143                                         <listitem>
 144                                                 <para>The netdev kind. Currently, <literal>bridge</literal>,
 145                                                 <literal>bond</literal> and <literal>vlan</literal>
 146                                                 are supported. This option is compulsory.</para>
 147                                         </listitem>
 148                                 </varlistentry>
 149                         </variablelist>
 150
 151                         <para>The <literal>[VLAN]</literal> section only applies for netdevs of kind <literal>vlan</literal>,
 152                         and accepts the following key:</para>
 153
 154                         <variablelist class='network-directives'>
 155                                 <varlistentry>
 156                                         <term><varname>Id=</varname></term>
 157                                         <listitem>
 158                                                 <para>The VLAN ID to use. An integer in the range 0–4094.
 159                                                 This option is compulsory.</para>
 160                                         </listitem>
 161                                 </varlistentry>
 162                         </variablelist>
 163
 164         </refsect1>
 165
 166         <refsect1>
 167                 <title>Example</title>
 168                 <example>
 169                         <title>/etc/systemd/network/bridge.netdev</title>
 170
 171                         <programlisting>[NetDev]
 172 Name=bridge0
 173 Kind=bridge</programlisting>
 174                 </example>
 175
 176                 <example>
 177                         <title>/etc/systemd/network/vlan1.netdev</title>
 178
 179                         <programlisting>[Match]
 180 Virtualization=no
 181
 182 [NetDev]
 183 Name=vlan1
 184 Kind=vlan
 185
 186 [VLAN]
 187 Id=1</programlisting>
 188                 </example>
 189
 190         </refsect1>
 191
 192         <refsect1>
 193                 <title>See Also</title>
 194                 <para>
 195                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 196                         <citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 197                 </para>
 198         </refsect1>
 199
 200 </refentry>