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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 | <!-- | |
572eb058 | 6 | SPDX-License-Identifier: LGPL-2.1+ |
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7 | --> |
8 | ||
2b70d172 | 9 | <refentry id="systemd-networkd.service" conditional='ENABLE_NETWORKD'> |
46b0925d | 10 | |
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11 | <refentryinfo> |
12 | <title>systemd-networkd.service</title> | |
13 | <productname>systemd</productname> | |
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14 | </refentryinfo> |
15 | ||
16 | <refmeta> | |
17 | <refentrytitle>systemd-networkd.service</refentrytitle> | |
18 | <manvolnum>8</manvolnum> | |
19 | </refmeta> | |
20 | ||
21 | <refnamediv> | |
22 | <refname>systemd-networkd.service</refname> | |
23 | <refname>systemd-networkd</refname> | |
24 | <refpurpose>Network manager</refpurpose> | |
25 | </refnamediv> | |
26 | ||
27 | <refsynopsisdiv> | |
28 | <para><filename>systemd-networkd.service</filename></para> | |
12b42c76 | 29 | <para><filename>/usr/lib/systemd/systemd-networkd</filename></para> |
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30 | </refsynopsisdiv> |
31 | ||
32 | <refsect1> | |
33 | <title>Description</title> | |
34 | ||
35 | <para><command>systemd-networkd</command> is a system service that | |
36 | manages networks. It detects and configures network devices as | |
37 | they appear, as well as creating virtual network devices.</para> | |
38 | ||
39 | <para>To configure low-level link settings independently of | |
40 | networks, see | |
41 | <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
42 | ||
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43 | <para><command>systemd-networkd</command> will create network devices based |
44 | on the configuration in | |
45 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
46 | files, respecting the [Match] sections in those files.</para> | |
47 | ||
48 | <para><command>systemd-networkd</command> will manage network addresses and | |
49 | routes for any link for which it finds a <filename>.network</filename> file | |
50 | with an appropriate [Match] section, see | |
51 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
52 | For those links, it will flush existing network addresses and routes when | |
53 | bringing up the device. Any links not matched by one of the | |
54 | <filename>.network</filename> files will be ignored. It is also possible to | |
55 | explicitly tell <filename>systemd-networkd</filename> to ignore a link by | |
56 | using <varname>Unmanaged=yes</varname> option, see | |
57 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
58 | </para> | |
59 | ||
60 | <para>When <filename>systemd-networkd</filename> exits, it generally leaves | |
61 | existing network devices and configuration intact. This makes it possible to | |
62 | transition from the initrams and to restart the service without breaking | |
63 | connectivity. This also means that when configuration is updated and | |
64 | <filename>systemd-networkd</filename> is restarted, netdev interfaces for | |
65 | which configuration was removed will not be dropped, and may need to be | |
66 | cleaned up manually.</para> | |
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67 | </refsect1> |
68 | ||
69 | <refsect1><title>Configuration Files</title> | |
70 | <para>The configuration files are read from the files located in the | |
12b42c76 | 71 | system network directory <filename>/usr/lib/systemd/network</filename>, |
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72 | the volatile runtime network directory |
73 | <filename>/run/systemd/network</filename> and the local administration | |
12b42c76 | 74 | network directory <filename>/etc/systemd/network</filename>.</para> |
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75 | |
76 | <para>Networks are configured in <filename>.network</filename> | |
77 | files, see | |
78 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
79 | and virtual network devices are configured in | |
80 | <filename>.netdev</filename> files, see | |
81 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
82 | </para> | |
83 | </refsect1> | |
84 | ||
85 | <refsect1> | |
86 | <title>See Also</title> | |
87 | <para> | |
88 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
89 | <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
90 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
91 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
92 | <citerefentry><refentrytitle>systemd-networkd-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
93 | </para> | |
94 | </refsect1> | |
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95 | |
96 | </refentry> |