Systemd/man/networkd.conf.xml

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

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  Copyright 2014 Vinay Kulkarni

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<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.
    For e.g. DHCP Unique Identifier (DUID).</para>

  </refsect1>

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

  <refsect1>
    <title>[DUID] 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 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>.</para>

    <para>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>

    <para>The following options are available in <literal>[DUID]</literal> section:</para>

    <variablelist class='network-directives'>

      <varlistentry>
        <term><varname>RawData=</varname></term>
        <listitem><para>Specifies the DUID bytes as a single newline-terminated, hexadecimal
        string, with each byte separated by a ':'.</para></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>