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1 | <?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
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 2014 Vinay Kulkarni | |
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 | ||
26 | <refentry id="networkd.conf" conditional='ENABLE_NETWORKD' | |
27 | xmlns:xi="http://www.w3.org/2001/XInclude"> | |
28 | <refentryinfo> | |
29 | <title>networkd.conf</title> | |
30 | <productname>systemd</productname> | |
31 | ||
32 | <authorgroup> | |
33 | <author> | |
34 | <contrib>Developer</contrib> | |
35 | <firstname>Vinay</firstname> | |
36 | <surname>Kulkarni</surname> | |
37 | <email>kulkarniv@vmware.com</email> | |
38 | </author> | |
39 | </authorgroup> | |
40 | </refentryinfo> | |
41 | ||
42 | <refmeta> | |
43 | <refentrytitle>networkd.conf</refentrytitle> | |
44 | <manvolnum>5</manvolnum> | |
45 | </refmeta> | |
46 | ||
47 | <refnamediv> | |
48 | <refname>networkd.conf</refname> | |
49 | <refname>networkd.conf.d</refname> | |
50 | <refpurpose>Global Network configuration files</refpurpose> | |
51 | </refnamediv> | |
52 | ||
53 | <refsynopsisdiv> | |
54 | <para><filename>/etc/systemd/networkd.conf</filename></para> | |
55 | <para><filename>/etc/systemd/networkd.conf.d/*.conf</filename></para> | |
56 | <para><filename>/usr/lib/systemd/networkd.conf.d/*.conf</filename></para> | |
57 | </refsynopsisdiv> | |
58 | ||
59 | <refsect1> | |
60 | <title>Description</title> | |
61 | ||
62 | <para>These configuration files control global network parameters. | |
e2e08e77 | 63 | Currently the DHCP Unique Identifier (DUID).</para> |
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64 | |
65 | </refsect1> | |
66 | ||
67 | <xi:include href="standard-conf.xml" xpointer="main-conf" /> | |
68 | ||
69 | <refsect1> | |
e2e08e77 | 70 | <title>[DHCP] Section Options</title> |
413708d1 | 71 | |
95f4c7f5 | 72 | <para>This section configures the DHCP Unique Identifier (DUID) value used by DHCP |
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73 | protocol. DHCPv6 client protocol sends the DHCP Unique Identifier and the interface |
74 | Identity Association Identifier (IAID) to a DHCP server when acquiring a dynamic IPv6 | |
75 | address. DHCPv4 client protocol sends IAID and DUID to the DHCP server when acquiring | |
76 | a dynamic IPv4 address if <option>ClientIdentifier=duid</option>. IAID and DUID allows | |
77 | a DHCP server to uniquely identify the machine and the interface requesting a DHCP IP. | |
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78 | To configure IAID and ClientIdentifier, see |
79 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
80 | </para> | |
413708d1 | 81 | |
e2e08e77 | 82 | <para>The following options are understood:</para> |
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83 | |
84 | <variablelist class='network-directives'> | |
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85 | <varlistentry> |
86 | <term><varname>DUIDType=</varname></term> | |
87 | <listitem><para>Specifies how the DUID should be generated. See | |
88 | <ulink url="https://tools.ietf.org/html/rfc3315#section-9">RFC 3315</ulink> | |
89 | for a description of all the options.</para> | |
90 | ||
91 | <para>The following values are understood: | |
92 | <variablelist> | |
93 | <varlistentry> | |
94 | <term><option>vendor</option> </term> | |
95 | <listitem><para>If <literal>DUIDType=vendor</literal>, then the DUID value will be generated using | |
96 | <literal>43793</literal> as the vendor identifier (systemd) and hashed contents of | |
97 | <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
98 | This is the default if <varname>DUIDType=</varname> is not specified. | |
99 | </para></listitem> | |
100 | </varlistentry> | |
101 | ||
102 | <varlistentry> | |
103 | <term><option>link-layer-time</option> </term> | |
104 | <term><option>link-layer</option> </term> | |
105 | <term><option>uuid</option> </term> | |
106 | <listitem><para>Those values are parsed and can be used to set the DUID type | |
107 | field, but DUID contents must be provided using <varname>DUIDRawData=</varname>. | |
108 | </para></listitem> | |
109 | </varlistentry> | |
110 | </variablelist> | |
111 | </para> | |
112 | ||
113 | <para>In all cases, <varname>DUIDRawData=</varname> can be used to override the | |
114 | actual DUID value that is used.</para></listitem> | |
115 | </varlistentry> | |
413708d1 | 116 | |
413708d1 | 117 | <varlistentry> |
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118 | <term><varname>DUIDRawData=</varname></term> |
119 | <listitem><para>Specifies the DHCP DUID value as a single newline-terminated, hexadecimal string, with each | |
120 | byte separated by <literal>:</literal>. The DUID that is sent is composed of the DUID type specified by | |
121 | <varname>DUIDType=</varname> and the value configured here.</para> | |
122 | ||
123 | <para>The DUID value specified here overrides the DUID that systemd-networkd generates using the machine-id | |
124 | from the <filename>/etc/machine-id</filename> file. To configure DUID per-network, see | |
2ac5fe95 | 125 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. |
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126 | The configured DHCP DUID should conform to the specification in |
127 | <ulink url="http://tools.ietf.org/html/rfc3315#section-9">RFC 3315</ulink>, | |
128 | <ulink url="http://tools.ietf.org/html/rfc6355">RFC 6355</ulink>. To configure IAID, see | |
129 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum> | |
130 | </citerefentry>.</para> | |
131 | ||
132 | <example> | |
133 | <title>A <option>DUIDType=vendor</option> with a custom value</title> | |
134 | ||
135 | <programlisting>DUIDType=vendor | |
136 | DUIDRawData=00:00:ab:11:f9:2a:c2:77:29:f9:5c:00</programlisting> | |
137 | ||
138 | <para>This specifies a 14 byte DUID, with the type DUID-EN (<literal>00:02</literal>), enterprise number | |
139 | 43793 (<literal>00:00:ab:11</literal>), and identifier value <literal>f9:2a:c2:77:29:f9:5c:00</literal>. | |
140 | </para> | |
141 | </example> | |
142 | </listitem> | |
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143 | </varlistentry> |
144 | </variablelist> | |
145 | </refsect1> | |
146 | ||
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147 | <refsect1> |
148 | <title>See Also</title> | |
149 | <para> | |
150 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
151 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
152 | <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
153 | </para> | |
154 | </refsect1> | |
155 | ||
156 | </refentry> |