<title>[DHCPv4] Section Options</title>

<para>This section configures the DHCP Unique Identifier (DUID) value used by DHCP protocol. 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 address. To configure IAID and ClientIdentifier, see

<refsect1>

<title>[DHCPv6] Section Options</title>

<para>This section configures the DHCP Unique Identifier (DUID) value used by DHCPv6 protocol.

DHCPv6 client protocol sends the DHCP Unique Identifier and the interface Identity Association

Identifier (IAID) to a DHCPv6 server when acquiring a dynamic IPv6 address. IAID and DUID allows a

DHCPv6 server to uniquely identify the machine and the interface requesting a DHCP IP address. To

configure IAID, 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>

<term><varname>DUIDRawData=</varname></term>

<listitem><para>As in the [DHCPv4] section.</para></listitem>

</varlistentry>

</variablelist>

</refsect1>