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46b0925d | 1 | <?xml version='1.0'?> <!--*-nxml-*--> |
3a54a157 | 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
0307f791 | 4 | <!-- SPDX-License-Identifier: LGPL-2.1+ --> |
46b0925d | 5 | |
2b70d172 | 6 | <refentry id="systemd-networkd.service" conditional='ENABLE_NETWORKD'> |
46b0925d | 7 | |
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8 | <refentryinfo> |
9 | <title>systemd-networkd.service</title> | |
10 | <productname>systemd</productname> | |
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11 | </refentryinfo> |
12 | ||
13 | <refmeta> | |
14 | <refentrytitle>systemd-networkd.service</refentrytitle> | |
15 | <manvolnum>8</manvolnum> | |
16 | </refmeta> | |
17 | ||
18 | <refnamediv> | |
19 | <refname>systemd-networkd.service</refname> | |
20 | <refname>systemd-networkd</refname> | |
21 | <refpurpose>Network manager</refpurpose> | |
22 | </refnamediv> | |
23 | ||
24 | <refsynopsisdiv> | |
25 | <para><filename>systemd-networkd.service</filename></para> | |
12b42c76 | 26 | <para><filename>/usr/lib/systemd/systemd-networkd</filename></para> |
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27 | </refsynopsisdiv> |
28 | ||
29 | <refsect1> | |
30 | <title>Description</title> | |
31 | ||
32 | <para><command>systemd-networkd</command> is a system service that | |
33 | manages networks. It detects and configures network devices as | |
34 | they appear, as well as creating virtual network devices.</para> | |
35 | ||
36 | <para>To configure low-level link settings independently of | |
37 | networks, see | |
38 | <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> | |
39 | ||
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40 | <para><command>systemd-networkd</command> will create network devices based |
41 | on the configuration in | |
42 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
43 | files, respecting the [Match] sections in those files.</para> | |
44 | ||
45 | <para><command>systemd-networkd</command> will manage network addresses and | |
46 | routes for any link for which it finds a <filename>.network</filename> file | |
47 | with an appropriate [Match] section, see | |
48 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
49 | For those links, it will flush existing network addresses and routes when | |
50 | bringing up the device. Any links not matched by one of the | |
51 | <filename>.network</filename> files will be ignored. It is also possible to | |
52 | explicitly tell <filename>systemd-networkd</filename> to ignore a link by | |
53 | using <varname>Unmanaged=yes</varname> option, see | |
54 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
55 | </para> | |
56 | ||
57 | <para>When <filename>systemd-networkd</filename> exits, it generally leaves | |
58 | existing network devices and configuration intact. This makes it possible to | |
bb01aab6 | 59 | transition from the initramfs and to restart the service without breaking |
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60 | connectivity. This also means that when configuration is updated and |
61 | <filename>systemd-networkd</filename> is restarted, netdev interfaces for | |
62 | which configuration was removed will not be dropped, and may need to be | |
63 | cleaned up manually.</para> | |
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64 | |
65 | <para><command>systemd-networkd</command> may be introspected and controlled at runtime using | |
66 | <citerefentry><refentrytitle>networkctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>. | |
67 | </para> | |
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68 | </refsect1> |
69 | ||
70 | <refsect1><title>Configuration Files</title> | |
71 | <para>The configuration files are read from the files located in the | |
12b42c76 | 72 | system network directory <filename>/usr/lib/systemd/network</filename>, |
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73 | the volatile runtime network directory |
74 | <filename>/run/systemd/network</filename> and the local administration | |
12b42c76 | 75 | network directory <filename>/etc/systemd/network</filename>.</para> |
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76 | |
77 | <para>Networks are configured in <filename>.network</filename> | |
78 | files, see | |
79 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
80 | and virtual network devices are configured in | |
81 | <filename>.netdev</filename> files, see | |
82 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
83 | </para> | |
84 | </refsect1> | |
85 | ||
86 | <refsect1> | |
87 | <title>See Also</title> | |
88 | <para> | |
82c8bdff | 89 | <citerefentry><refentrytitle>networkctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
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90 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
91 | <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
92 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
93 | <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
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94 | <citerefentry><refentrytitle>systemd-networkd-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
95 | <citerefentry><refentrytitle>systemd-networkd-generator.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
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96 | </para> |
97 | </refsect1> | |
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98 | |
99 | </refentry> |