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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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4 | |
5 | <!-- | |
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6 | SPDX-License-Identifier: LGPL-2.1+ |
7 | ||
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8 | This file is part of systemd. |
9 | ||
10 | Copyright 2013 Tom Gundersen | |
11 | ||
12 | systemd is free software; you can redistribute it and/or modify it | |
13 | under the terms of the GNU Lesser General Public License as published by | |
14 | the Free Software Foundation; either version 2.1 of the License, or | |
15 | (at your option) any later version. | |
16 | ||
17 | systemd is distributed in the hope that it will be useful, but | |
18 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | Lesser General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU Lesser General Public License | |
23 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
24 | --> | |
25 | ||
2b70d172 | 26 | <refentry id="systemd-networkd.service" conditional='ENABLE_NETWORKD'> |
46b0925d | 27 | |
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28 | <refentryinfo> |
29 | <title>systemd-networkd.service</title> | |
30 | <productname>systemd</productname> | |
31 | ||
32 | <authorgroup> | |
33 | <author> | |
34 | <contrib>Developer</contrib> | |
35 | <firstname>Tom</firstname> | |
36 | <surname>Gundersen</surname> | |
37 | <email>teg@jklm.no</email> | |
38 | </author> | |
39 | </authorgroup> | |
40 | </refentryinfo> | |
41 | ||
42 | <refmeta> | |
43 | <refentrytitle>systemd-networkd.service</refentrytitle> | |
44 | <manvolnum>8</manvolnum> | |
45 | </refmeta> | |
46 | ||
47 | <refnamediv> | |
48 | <refname>systemd-networkd.service</refname> | |
49 | <refname>systemd-networkd</refname> | |
50 | <refpurpose>Network manager</refpurpose> | |
51 | </refnamediv> | |
52 | ||
53 | <refsynopsisdiv> | |
54 | <para><filename>systemd-networkd.service</filename></para> | |
12b42c76 | 55 | <para><filename>/usr/lib/systemd/systemd-networkd</filename></para> |
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56 | </refsynopsisdiv> |
57 | ||
58 | <refsect1> | |
59 | <title>Description</title> | |
60 | ||
61 | <para><command>systemd-networkd</command> is a system service that | |
62 | manages networks. It detects and configures network devices as | |
63 | they appear, as well as creating virtual network devices.</para> | |
64 | ||
65 | <para>To configure low-level link settings independently of | |
66 | networks, see | |
67 | <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
68 | ||
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69 | <para><command>systemd-networkd</command> will create network devices based |
70 | on the configuration in | |
71 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
72 | files, respecting the [Match] sections in those files.</para> | |
73 | ||
74 | <para><command>systemd-networkd</command> will manage network addresses and | |
75 | routes for any link for which it finds a <filename>.network</filename> file | |
76 | with an appropriate [Match] section, see | |
77 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
78 | For those links, it will flush existing network addresses and routes when | |
79 | bringing up the device. Any links not matched by one of the | |
80 | <filename>.network</filename> files will be ignored. It is also possible to | |
81 | explicitly tell <filename>systemd-networkd</filename> to ignore a link by | |
82 | using <varname>Unmanaged=yes</varname> option, see | |
83 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
84 | </para> | |
85 | ||
86 | <para>When <filename>systemd-networkd</filename> exits, it generally leaves | |
87 | existing network devices and configuration intact. This makes it possible to | |
88 | transition from the initrams and to restart the service without breaking | |
89 | connectivity. This also means that when configuration is updated and | |
90 | <filename>systemd-networkd</filename> is restarted, netdev interfaces for | |
91 | which configuration was removed will not be dropped, and may need to be | |
92 | cleaned up manually.</para> | |
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93 | </refsect1> |
94 | ||
95 | <refsect1><title>Configuration Files</title> | |
96 | <para>The configuration files are read from the files located in the | |
12b42c76 | 97 | system network directory <filename>/usr/lib/systemd/network</filename>, |
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98 | the volatile runtime network directory |
99 | <filename>/run/systemd/network</filename> and the local administration | |
12b42c76 | 100 | network directory <filename>/etc/systemd/network</filename>.</para> |
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101 | |
102 | <para>Networks are configured in <filename>.network</filename> | |
103 | files, see | |
104 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
105 | and virtual network devices are configured in | |
106 | <filename>.netdev</filename> files, see | |
107 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
108 | </para> | |
109 | </refsect1> | |
110 | ||
111 | <refsect1> | |
112 | <title>See Also</title> | |
113 | <para> | |
114 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
115 | <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
116 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
117 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
118 | <citerefentry><refentrytitle>systemd-networkd-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
119 | </para> | |
120 | </refsect1> | |
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121 | |
122 | </refentry> |