2 <!DOCTYPE refentry PUBLIC
"-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
6 SPDX-License-Identifier: LGPL-2.1-or-later
8 Copyright © 2014 Vinay Kulkarni
11 <refentry id=
"networkd.conf" conditional='ENABLE_NETWORKD'
12 xmlns:
xi=
"http://www.w3.org/2001/XInclude">
14 <title>networkd.conf
</title>
15 <productname>systemd
</productname>
19 <refentrytitle>networkd.conf
</refentrytitle>
20 <manvolnum>5</manvolnum>
24 <refname>networkd.conf
</refname>
25 <refname>networkd.conf.d
</refname>
26 <refpurpose>Global Network configuration files
</refpurpose>
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>
36 <title>Description
</title>
38 <para>These configuration files control global network parameters.
39 Currently the DHCP Unique Identifier (DUID).
</para>
43 <xi:include href=
"standard-conf.xml" xpointer=
"main-conf" />
46 <title>[Network] Section Options
</title>
48 <para>The following options are available in the [Network] section:
</para>
50 <variablelist class='network-directives'
>
52 <term><varname>SpeedMeter=
</varname></term>
53 <listitem><para>Takes a boolean. If set to yes, then
<command>systemd-networkd
</command>
54 measures the traffic of each interface, and
55 <command>networkctl status
<replaceable>INTERFACE
</replaceable></command> shows the measured speed.
56 Defaults to no.
</para></listitem>
60 <term><varname>SpeedMeterIntervalSec=
</varname></term>
61 <listitem><para>Specifies the time interval to calculate the traffic speed of each interface.
62 If
<varname>SpeedMeter=no
</varname>, the value is ignored. Defaults to
10sec.
</para></listitem>
66 <term><varname>ManageForeignRoutingPolicyRules=
</varname></term>
67 <listitem><para>A boolean. When true,
<command>systemd-networkd
</command> will remove rules
68 that are not configured in .network files (except for rules with protocol
69 <literal>kernel
</literal>). When false, it will not remove any foreign rules, keeping them even
70 if they are not configured in a .network file. Defaults to yes.
75 <term><varname>ManageForeignRoutes=
</varname></term>
76 <listitem><para>A boolean. When true,
<command>systemd-networkd
</command> will remove routes
77 that are not configured in .network files (except for routes with protocol
78 <literal>kernel
</literal>,
<literal>dhcp
</literal> when
<varname>KeepConfiguration=
</varname>
79 is true or
<literal>dhcp
</literal>, and
<literal>static
</literal> when
80 <varname>KeepConfiguration=
</varname> is true or
<literal>static
</literal>). When false, it will
81 not remove any foreign routes, keeping them even if they are not configured in a .network file.
82 Defaults to yes.
</para></listitem>
86 <term><varname>RouteTable=
</varname></term>
87 <listitem><para>Defines the route table name. Takes a whitespace-separated list of the pairs of
88 route table name and number. The route table name and number in each pair are separated with a
89 colon, i.e.,
<literal><replaceable>name
</replaceable>:
<replaceable>number
</replaceable></literal>.
90 The route table name must not be
<literal>default
</literal>,
<literal>main
</literal>, or
91 <literal>local
</literal>, as these route table names are predefined with route table number
253,
92 254, and
255, respectively. The route table number must be an integer in the range
1…
4294967295,
93 except for predefined numbers
253,
254, and
255. This setting can be specified multiple times.
94 If an empty string is specified, then the list specified earlier are cleared. Defaults to unset.
99 <term><varname>IPv6PrivacyExtensions=
</varname></term>
101 <para>Specifies the default value for per-network
<varname>IPv6PrivacyExtensions=
</varname>.
102 Takes a boolean or the special values
<literal>prefer-public
</literal> and
103 <literal>kernel
</literal>. See for details in
104 <citerefentry><refentrytitle>systemd.network
</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
105 Defaults to
<literal>no
</literal>.
</para>
112 <title>[DHCPv4] Section Options
</title>
114 <para>This section configures the DHCP Unique Identifier (DUID) value used by DHCP protocol. DHCPv4
115 client protocol sends IAID and DUID to the DHCP server when acquiring a dynamic IPv4 address if
116 <option>ClientIdentifier=duid
</option>. IAID and DUID allows a DHCP server to uniquely identify the
117 machine and the interface requesting a DHCP IP address. To configure IAID and ClientIdentifier, see
118 <citerefentry><refentrytitle>systemd.network
</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
121 <para>The following options are understood:
</para>
123 <variablelist class='network-directives'
>
125 <term><varname>DUIDType=
</varname></term>
126 <listitem><para>Specifies how the DUID should be generated. See
127 <ulink url=
"https://tools.ietf.org/html/rfc3315#section-9">RFC
3315</ulink>
128 for a description of all the options.
</para>
130 <para>This takes an integer in the range
0…
65535, or one of the following string values:
133 <term><option>vendor
</option></term>
134 <listitem><para>If
<literal>DUIDType=vendor
</literal>, then the DUID value will be generated using
135 <literal>43793</literal> as the vendor identifier (systemd) and hashed contents of
136 <citerefentry><refentrytitle>machine-id
</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
137 This is the default if
<varname>DUIDType=
</varname> is not specified.
142 <term><option>uuid
</option></term>
143 <listitem><para>If
<literal>DUIDType=uuid
</literal>, and
<varname>DUIDRawData=
</varname> is not set,
144 then the product UUID is used as a DUID value. If a system does not have valid product UUID, then
145 an application-specific
146 <citerefentry><refentrytitle>machine-id
</refentrytitle><manvolnum>5</manvolnum></citerefentry>
147 is used as a DUID value. About the application-specific machine ID, see
148 <citerefentry><refentrytitle>sd_id128_get_machine_app_specific
</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
153 <term><option>link-layer-time[:
<replaceable>TIME
</replaceable>]
</option></term>
154 <term><option>link-layer
</option></term>
155 <listitem><para>If
<literal>link-layer-time
</literal> or
<literal>link-layer
</literal> is specified,
156 then the MAC address of the interface is used as a DUID value. The value
<literal>link-layer-time
</literal>
157 can take additional time value after a colon, e.g.
<literal>link-layer-time:
2018-
01-
23 12:
34:
56 UTC
</literal>.
158 The default time value is
<literal>2000-
01-
01 00:
00:
00 UTC
</literal>.
164 <para>In all cases,
<varname>DUIDRawData=
</varname> can be used to override the
165 actual DUID value that is used.
</para></listitem>
169 <term><varname>DUIDRawData=
</varname></term>
170 <listitem><para>Specifies the DHCP DUID value as a single newline-terminated, hexadecimal string, with each
171 byte separated by
<literal>:
</literal>. The DUID that is sent is composed of the DUID type specified by
172 <varname>DUIDType=
</varname> and the value configured here.
</para>
174 <para>The DUID value specified here overrides the DUID that
175 <citerefentry><refentrytitle>systemd-networkd.service
</refentrytitle><manvolnum>8</manvolnum></citerefentry>
176 generates from the machine ID. To configure DUID per-network, see
177 <citerefentry><refentrytitle>systemd.network
</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
178 The configured DHCP DUID should conform to the specification in
179 <ulink url=
"http://tools.ietf.org/html/rfc3315#section-9">RFC
3315</ulink>,
180 <ulink url=
"http://tools.ietf.org/html/rfc6355">RFC
6355</ulink>. To configure IAID, see
181 <citerefentry><refentrytitle>systemd.network
</refentrytitle><manvolnum>5</manvolnum>
182 </citerefentry>.
</para>
185 <title>A
<option>DUIDType=vendor
</option> with a custom value
</title>
187 <programlisting>DUIDType=vendor
188 DUIDRawData=
00:
00:ab:
11:f9:
2a:c2:
77:
29:f9:
5c:
00</programlisting>
190 <para>This specifies a
14 byte DUID, with the type DUID-EN (
<literal>00:
02</literal>), enterprise number
191 43793 (
<literal>00:
00:ab:
11</literal>), and identifier value
<literal>f9:
2a:c2:
77:
29:f9:
5c:
00</literal>.
200 <title>[DHCPv6] Section Options
</title>
202 <para>This section configures the DHCP Unique Identifier (DUID) value used by DHCPv6 protocol.
203 DHCPv6 client protocol sends the DHCP Unique Identifier and the interface Identity Association
204 Identifier (IAID) to a DHCPv6 server when acquiring a dynamic IPv6 address. IAID and DUID allows a
205 DHCPv6 server to uniquely identify the machine and the interface requesting a DHCP IP address. To
207 <citerefentry><refentrytitle>systemd.network
</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
210 <para>The following options are understood:
</para>
212 <variablelist class='network-directives'
>
214 <term><varname>DUIDType=
</varname></term>
215 <term><varname>DUIDRawData=
</varname></term>
216 <listitem><para>As in the [DHCPv4] section.
</para></listitem>
222 <title>See Also
</title>
224 <citerefentry><refentrytitle>systemd
</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
225 <citerefentry><refentrytitle>systemd.network
</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
226 <citerefentry><refentrytitle>systemd-networkd.service
</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
227 <citerefentry><refentrytitle>machine-id
</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
228 <citerefentry><refentrytitle>sd_id128_get_machine_app_specific
</refentrytitle><manvolnum>3</manvolnum></citerefentry>