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+<?xml version='1.0'?> <!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+ SPDX-License-Identifier: LGPL-2.1+
+-->
+
+<refentry id="systemd-networkd.service" conditional='ENABLE_NETWORKD'>
+
+ <refentryinfo>
+ <title>systemd-networkd.service</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-networkd.service</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-networkd.service</refname>
+ <refname>systemd-networkd</refname>
+ <refpurpose>Network manager</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-networkd.service</filename></para>
+ <para><filename>/usr/lib/systemd/systemd-networkd</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><command>systemd-networkd</command> is a system service that
+ manages networks. It detects and configures network devices as
+ they appear, as well as creating virtual network devices.</para>
+
+ <para>To configure low-level link settings independently of
+ networks, see
+ <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
+
+ <para><command>systemd-networkd</command> will create network devices based
+ on the configuration in
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ files, respecting the [Match] sections in those files.</para>
+
+ <para><command>systemd-networkd</command> will manage network addresses and
+ routes for any link for which it finds a <filename>.network</filename> file
+ with an appropriate [Match] section, see
+ <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ For those links, it will flush existing network addresses and routes when
+ bringing up the device. Any links not matched by one of the
+ <filename>.network</filename> files will be ignored. It is also possible to
+ explicitly tell <filename>systemd-networkd</filename> to ignore a link by
+ using <varname>Unmanaged=yes</varname> option, see
+ <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ </para>
+
+ <para>When <filename>systemd-networkd</filename> exits, it generally leaves
+ existing network devices and configuration intact. This makes it possible to
+ transition from the initramfs and to restart the service without breaking
+ connectivity. This also means that when configuration is updated and
+ <filename>systemd-networkd</filename> is restarted, netdev interfaces for
+ which configuration was removed will not be dropped, and may need to be
+ cleaned up manually.</para>
+ </refsect1>
+
+ <refsect1><title>Configuration Files</title>
+ <para>The configuration files are read from the files located in the
+ system network directory <filename>/usr/lib/systemd/network</filename>,
+ the volatile runtime network directory
+ <filename>/run/systemd/network</filename> and the local administration
+ network directory <filename>/etc/systemd/network</filename>.</para>
+
+ <para>Networks are configured in <filename>.network</filename>
+ files, see
+ <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ and virtual network devices are configured in
+ <filename>.netdev</filename> files, see
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-networkd-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>