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514094f9 | 1 | <?xml version='1.0'?> |
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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 | ||
96b2fb93 | 8 | Copyright © 2014 Vinay Kulkarni |
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9 | --> |
10 | ||
11 | <refentry id="networkd.conf" conditional='ENABLE_NETWORKD' | |
12 | xmlns:xi="http://www.w3.org/2001/XInclude"> | |
13 | <refentryinfo> | |
14 | <title>networkd.conf</title> | |
15 | <productname>systemd</productname> | |
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16 | </refentryinfo> |
17 | ||
18 | <refmeta> | |
19 | <refentrytitle>networkd.conf</refentrytitle> | |
20 | <manvolnum>5</manvolnum> | |
21 | </refmeta> | |
22 | ||
23 | <refnamediv> | |
24 | <refname>networkd.conf</refname> | |
25 | <refname>networkd.conf.d</refname> | |
26 | <refpurpose>Global Network configuration files</refpurpose> | |
27 | </refnamediv> | |
28 | ||
29 | <refsynopsisdiv> | |
30 | <para><filename>/etc/systemd/networkd.conf</filename></para> | |
31 | <para><filename>/etc/systemd/networkd.conf.d/*.conf</filename></para> | |
32 | <para><filename>/usr/lib/systemd/networkd.conf.d/*.conf</filename></para> | |
33 | </refsynopsisdiv> | |
34 | ||
35 | <refsect1> | |
36 | <title>Description</title> | |
37 | ||
38 | <para>These configuration files control global network parameters. | |
e2e08e77 | 39 | Currently the DHCP Unique Identifier (DUID).</para> |
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40 | |
41 | </refsect1> | |
42 | ||
43 | <xi:include href="standard-conf.xml" xpointer="main-conf" /> | |
44 | ||
45 | <refsect1> | |
e2e08e77 | 46 | <title>[DHCP] Section Options</title> |
413708d1 | 47 | |
95f4c7f5 | 48 | <para>This section configures the DHCP Unique Identifier (DUID) value used by DHCP |
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49 | protocol. DHCPv6 client protocol sends the DHCP Unique Identifier and the interface |
50 | Identity Association Identifier (IAID) to a DHCP server when acquiring a dynamic IPv6 | |
51 | address. DHCPv4 client protocol sends IAID and DUID to the DHCP server when acquiring | |
52 | a dynamic IPv4 address if <option>ClientIdentifier=duid</option>. IAID and DUID allows | |
53 | a DHCP server to uniquely identify the machine and the interface requesting a DHCP IP. | |
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54 | To configure IAID and ClientIdentifier, see |
55 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
56 | </para> | |
413708d1 | 57 | |
e2e08e77 | 58 | <para>The following options are understood:</para> |
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59 | |
60 | <variablelist class='network-directives'> | |
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61 | <varlistentry> |
62 | <term><varname>DUIDType=</varname></term> | |
63 | <listitem><para>Specifies how the DUID should be generated. See | |
64 | <ulink url="https://tools.ietf.org/html/rfc3315#section-9">RFC 3315</ulink> | |
65 | for a description of all the options.</para> | |
66 | ||
67 | <para>The following values are understood: | |
68 | <variablelist> | |
69 | <varlistentry> | |
319b94bc | 70 | <term><option>vendor</option></term> |
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71 | <listitem><para>If <literal>DUIDType=vendor</literal>, then the DUID value will be generated using |
72 | <literal>43793</literal> as the vendor identifier (systemd) and hashed contents of | |
73 | <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
74 | This is the default if <varname>DUIDType=</varname> is not specified. | |
75 | </para></listitem> | |
76 | </varlistentry> | |
77 | ||
78 | <varlistentry> | |
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79 | <term><option>uuid</option></term> |
80 | <listitem><para>If <literal>DUIDType=uuid</literal>, and <varname>DUIDRawData=</varname> is not set, | |
81 | then the product UUID is used as a DUID value. If a system does not have valid product UUID, then | |
82 | an application-specific | |
83 | <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
84 | is used as a DUID value. About the application-specific machine ID, see | |
85 | <citerefentry><refentrytitle>sd_id128_get_machine_app_specific</refentrytitle><manvolnum>3</manvolnum></citerefentry>. | |
86 | </para></listitem> | |
87 | </varlistentry> | |
88 | ||
89 | <varlistentry> | |
8fa266c2 | 90 | <term><option>link-layer-time[:<replaceable>TIME</replaceable>]</option></term> |
319b94bc | 91 | <term><option>link-layer</option></term> |
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92 | <listitem><para>If <literal>link-layer-time</literal> or <literal>link-layer</literal> is specified, |
93 | then the MAC address of the interface is used as a DUID value. The value <literal>link-layer-time</literal> | |
94 | can take additional time value after a colon, e.g. <literal>link-layer-time:2018-01-23 12:34:56 UTC</literal>. | |
95 | The default time value is <literal>2000-01-01 00:00:00 UTC</literal>. | |
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96 | </para></listitem> |
97 | </varlistentry> | |
98 | </variablelist> | |
99 | </para> | |
100 | ||
101 | <para>In all cases, <varname>DUIDRawData=</varname> can be used to override the | |
102 | actual DUID value that is used.</para></listitem> | |
103 | </varlistentry> | |
413708d1 | 104 | |
413708d1 | 105 | <varlistentry> |
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106 | <term><varname>DUIDRawData=</varname></term> |
107 | <listitem><para>Specifies the DHCP DUID value as a single newline-terminated, hexadecimal string, with each | |
108 | byte separated by <literal>:</literal>. The DUID that is sent is composed of the DUID type specified by | |
109 | <varname>DUIDType=</varname> and the value configured here.</para> | |
110 | ||
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111 | <para>The DUID value specified here overrides the DUID that |
112 | <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
113 | generates from the machine ID. To configure DUID per-network, see | |
2ac5fe95 | 114 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>. |
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115 | The configured DHCP DUID should conform to the specification in |
116 | <ulink url="http://tools.ietf.org/html/rfc3315#section-9">RFC 3315</ulink>, | |
117 | <ulink url="http://tools.ietf.org/html/rfc6355">RFC 6355</ulink>. To configure IAID, see | |
118 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum> | |
119 | </citerefentry>.</para> | |
120 | ||
121 | <example> | |
122 | <title>A <option>DUIDType=vendor</option> with a custom value</title> | |
123 | ||
124 | <programlisting>DUIDType=vendor | |
125 | DUIDRawData=00:00:ab:11:f9:2a:c2:77:29:f9:5c:00</programlisting> | |
126 | ||
127 | <para>This specifies a 14 byte DUID, with the type DUID-EN (<literal>00:02</literal>), enterprise number | |
128 | 43793 (<literal>00:00:ab:11</literal>), and identifier value <literal>f9:2a:c2:77:29:f9:5c:00</literal>. | |
129 | </para> | |
130 | </example> | |
131 | </listitem> | |
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132 | </varlistentry> |
133 | </variablelist> | |
134 | </refsect1> | |
135 | ||
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136 | <refsect1> |
137 | <title>See Also</title> | |
138 | <para> | |
139 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
140 | <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
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141 | <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
142 | <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
143 | <citerefentry><refentrytitle>sd_id128_get_machine_app_specific</refentrytitle><manvolnum>3</manvolnum></citerefentry> | |
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144 | </para> |
145 | </refsect1> | |
146 | ||
147 | </refentry> |