summaryrefslogtreecommitdiffstats
path: root/man/networkd.conf.xml
blob: c624d4de436795487cf9a4bfdf40925af619bf53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
<?xml version='1.0'?>
<!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+

  Copyright © 2014 Vinay Kulkarni
-->

<refentry id="networkd.conf" conditional='ENABLE_NETWORKD'
    xmlns:xi="http://www.w3.org/2001/XInclude">
  <refentryinfo>
    <title>networkd.conf</title>
    <productname>systemd</productname>
  </refentryinfo>

  <refmeta>
    <refentrytitle>networkd.conf</refentrytitle>
    <manvolnum>5</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>networkd.conf</refname>
    <refname>networkd.conf.d</refname>
    <refpurpose>Global Network configuration files</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <para><filename>/etc/systemd/networkd.conf</filename></para>
    <para><filename>/etc/systemd/networkd.conf.d/*.conf</filename></para>
    <para><filename>/usr/lib/systemd/networkd.conf.d/*.conf</filename></para>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para>These configuration files control global network parameters.
    Currently the DHCP Unique Identifier (DUID).</para>

  </refsect1>

  <xi:include href="standard-conf.xml" xpointer="main-conf" />

  <refsect1>
    <title>[DHCP] Section Options</title>

    <para>This section configures the DHCP Unique Identifier (DUID) value used by DHCP
    protocol. DHCPv6 client protocol sends the DHCP Unique Identifier and the interface
    Identity Association Identifier (IAID) to a DHCP server when acquiring a dynamic IPv6
    address. DHCPv4 client protocol sends IAID and DUID to the DHCP server when acquiring
    a dynamic IPv4 address if <option>ClientIdentifier=duid</option>. IAID and DUID allows
    a DHCP server to uniquely identify the machine and the interface requesting a DHCP IP.
    To configure IAID and ClientIdentifier, see
    <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
    </para>

    <para>The following options are understood:</para>

    <variablelist class='network-directives'>
      <varlistentry>
        <term><varname>DUIDType=</varname></term>
        <listitem><para>Specifies how the DUID should be generated. See
        <ulink url="https://tools.ietf.org/html/rfc3315#section-9">RFC 3315</ulink>
        for a description of all the options.</para>

        <para>The following values are understood:
        <variablelist>
          <varlistentry>
            <term><option>vendor</option></term>
            <listitem><para>If <literal>DUIDType=vendor</literal>, then the DUID value will be generated using
            <literal>43793</literal> as the vendor identifier (systemd) and hashed contents of
            <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
            This is the default if <varname>DUIDType=</varname> is not specified.
            </para></listitem>
          </varlistentry>

          <varlistentry>
            <term><option>uuid</option></term>
            <listitem><para>If <literal>DUIDType=uuid</literal>, and <varname>DUIDRawData=</varname> is not set,
            then the product UUID is used as a DUID value. If a system does not have valid product UUID, then
            an application-specific
            <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
            is used as a DUID value. About the application-specific machine ID, see
            <citerefentry><refentrytitle>sd_id128_get_machine_app_specific</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
            </para></listitem>
          </varlistentry>

          <varlistentry>
            <term><option>link-layer-time[:<replaceable>TIME</replaceable>]</option></term>
            <term><option>link-layer</option></term>
            <listitem><para>If <literal>link-layer-time</literal> or <literal>link-layer</literal> is specified,
            then the MAC address of the interface is used as a DUID value. The value <literal>link-layer-time</literal>
            can take additional time value after a colon, e.g. <literal>link-layer-time:2018-01-23 12:34:56 UTC</literal>.
            The default time value is <literal>2000-01-01 00:00:00 UTC</literal>.
            </para></listitem>
          </varlistentry>
        </variablelist>
        </para>

        <para>In all cases, <varname>DUIDRawData=</varname> can be used to override the
        actual DUID value that is used.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><varname>DUIDRawData=</varname></term>
        <listitem><para>Specifies the DHCP DUID value as a single newline-terminated, hexadecimal string, with each
        byte separated by <literal>:</literal>. The DUID that is sent is composed of the DUID type specified by
        <varname>DUIDType=</varname> and the value configured here.</para>

        <para>The DUID value specified here overrides the DUID that
        <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
        generates from the machine ID. To configure DUID per-network, see
        <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
        The configured DHCP DUID should conform to the specification in
        <ulink url="http://tools.ietf.org/html/rfc3315#section-9">RFC 3315</ulink>,
        <ulink url="http://tools.ietf.org/html/rfc6355">RFC 6355</ulink>. To configure IAID, see
        <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum>
        </citerefentry>.</para>

        <example>
          <title>A <option>DUIDType=vendor</option> with a custom value</title>

          <programlisting>DUIDType=vendor
DUIDRawData=00:00:ab:11:f9:2a:c2:77:29:f9:5c:00</programlisting>

          <para>This specifies a 14 byte DUID, with the type DUID-EN (<literal>00:02</literal>), enterprise number
          43793 (<literal>00:00:ab:11</literal>), and identifier value <literal>f9:2a:c2:77:29:f9:5c:00</literal>.
          </para>
        </example>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
      <title>See Also</title>
      <para>
      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>sd_id128_get_machine_app_specific</refentrytitle><manvolnum>3</manvolnum></citerefentry>
      </para>
  </refsect1>

</refentry>