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-<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<!--
- This file is part of systemd.
-
- Copyright 2014 Vinay Kulkarni
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
--->
-
-<refentry id="networkd.conf" conditional='ENABLE_NETWORKD'
- xmlns:xi="http://www.w3.org/2001/XInclude">
- <refentryinfo>
- <title>networkd.conf</title>
- <productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Vinay</firstname>
- <surname>Kulkarni</surname>
- <email>kulkarniv@vmware.com</email>
- </author>
- </authorgroup>
- </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>link-layer-time</option> </term>
- <term><option>link-layer</option> </term>
- <term><option>uuid</option> </term>
- <listitem><para>Those values are parsed and can be used to set the DUID type
- field, but DUID contents must be provided using <varname>DUIDRawData=</varname>.
- </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 systemd-networkd generates using the machine-id
- from the <filename>/etc/machine-id</filename> file. 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>machine-id</refentrytitle><manvolnum>1</manvolnum></citerefentry>
- </para>
- </refsect1>
-
-</refentry>