194 lines
9.7 KiB
XML
194 lines
9.7 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-networkd.service" conditional='ENABLE_NETWORKD'>
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<refentryinfo>
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<title>systemd-networkd.service</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-networkd.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-networkd.service</refname>
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<refname>systemd-networkd</refname>
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<refpurpose>Network manager</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-networkd.service</filename></para>
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<para><filename>/usr/lib/systemd/systemd-networkd</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>systemd-networkd</command> is a system
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service that manages networks. It detects and configures
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network devices as they appear.</para>
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<para>Network configurations applied before networkd is started
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are not removed, and configuration applied by networkd are not
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removed when networkd exits. This ensures restarting networkd
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does not cut the network connection, and in particular that it
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is safe to transition between the initrd and the real root,
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and back.</para>
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</refsect1>
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<refsect1><title>Network Configuration</title>
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<para>The network 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 link 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>/lib</filename>. This can be used to override a
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system-supplied network file with a local file if needed; a symlink in
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<filename>/etc</filename> with the same name as a network file in
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<filename>/lib</filename>, pointing to <filename>/dev/null</filename>,
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disables the network file entirely. Network files must have the extension
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<filename>.network</filename>; other extensions are ignored.</para>
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<para>The network file contains a <literal>[Match]</literal> section,
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which determines if a given network file may be applied to a given device;
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and a <literal>[Network]</literal> section specifying how the device should
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be configured. The first (in lexical order) of the network files that
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matches a given device is applied.</para>
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<para>A network file is said to match a device if each of the entries in the
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<literal>[Match]</literal> section matches, or if the section is empty.
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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>MACAddress</varname></term>
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<listitem>
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<para>The hardware address.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Path</varname></term>
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<listitem>
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<para>The persistent path, as exposed by the udev
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property <literal>ID_PATH</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Driver</varname></term>
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<listitem>
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<para>The driver currently bound to the device, as
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exposed by the udev property <literal>DRIVER</literal>.
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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>Type</varname></term>
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<listitem>
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<para>The device type, as exposed by the udev property
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<literal>DEVTYPE</literal>.</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 device name, as exposed by the udev property
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<literal>INTERFACE</literal>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>The <literal>[Network]</literal> section accepts the following 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 description of the device. This is only used for
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presentation purposes.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Address</varname></term>
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<listitem>
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<para>A static IPv4 or IPv6 address and its prefix length,
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separated by a '/' character. The format of the address must
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be as described in
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<citerefentry><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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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>Gateway</varname></term>
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<listitem>
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<para>The gateway address, which must be in the format described in
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<citerefentry><refentrytitle>inet_pton</refentrytitle><manvolnum>3</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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<para>The <literal>[Address]</literal> section accepts the following keys:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Address</varname></term>
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<listitem>
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<para>As in the <literal>[Network]</literal> section.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Label</varname></term>
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<listitem>
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<para>An address label.</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>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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</para>
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</refsect1>
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</refentry>
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