.. cfgcmd:: set interfaces {{ var0 }} <interface> dhcpv6-options parameters-only

  This statement specifies dhcp6c to only exchange informational configuration
  parameters with servers. A list of DNS server addresses is an example of such
  parameters. This statement is useful when the client does not need stateful
  configuration parameters such as IPv6 addresses or prefixes.

  Example:

  .. code-block:: none

    set interfaces {{ var0 }} {{ var1 }} dhcpv6-options parameters-only

.. cfgcmd:: set interfaces {{ var0 }} <interface> dhcpv6-options rapid-commit

  When rapid-commit is specified, dhcp6c will include a rapid-commit option in
  solicit messages and wait for an immediate reply instead of advertisements.

  Example:

  .. code-block:: none

    set interfaces {{ var0 }} {{ var1 }} dhcpv6-options rapid-commit

.. cfgcmd:: set interfaces {{ var0 }} <interface> dhcpv6-options temporary

  Request only a temporary address and not form an IA_NA (Identity Association
  for Non-temporary Addresses) partnership.

  Example

  .. code-block:: none

    set interfaces {{ var0 }} {{ var1 }} dhcpv6-options temporary




**DHCPv6-PD**

VyOS 1.3 (equuleus) supports DHCPv6-PD (:rfc:`3633`). DHCPv6 Prefix Delegation
is supported by most ISPs who provide native IPv6 for consumers on fixed networks.

.. cfgcmd:: set interfaces {{ var0 }} <interface> dhcpv6-option pd <id> length <length>

   Some ISPs by default only delegate a /64 prefix. To request for a specific
   prefix size use this option to request for a bigger delegation for this pd
   `<id>`. This value is in the range from 32 - 64 so you could request up to a
   /32 prefix (if your ISP allows this) down to a /64 delegation.

   The default value corresponds to 64.

  Example:

  To request a /56 prefix from your ISP use:

  .. code-block:: none

    set interfaces {{ var0 }} {{ var1 }} dhcpv6-options pd 0 length 56

.. cfgcmd:: set interfaces {{ var0 }} <interface> dhcpv6-option pd <id> interface <delegatee> address <address>

   Specify the interface address used locally on the interfcae where the prefix
   has been delegated to. ID must be a decimal integer.

   It will be combined with the delegated prefix and the sla-id to form a
   complete interface address. The default is to use the EUI-64 address of the
   interface.

   Example: Delegate a /64 prefix to interface eth0.10 which will use a local
   address on this router of ``<prefix>::ffff``, as the address 65534 will
   correspond to ``ffff`` in hexadecimal notation.

  .. code-block:: none

    set interfaces {{ var0 }} {{ var1 }} dhcpv6-option pd 0 interface eth0.10 address 65534

.. cfgcmd:: set interfaces {{ var0 }} <interface> dhcpv6-option pd <id> interface <delegatee> sla-id <id>

   Specify the identifier value of the site-level aggregator (SLA) on the
   interface. ID must be a decimal number greater then 0 which fits in the
   length of SLA IDs (see below).

   Example: If ID is 1 and the client is delegated an IPv6 prefix
   2001:db8:ffff::/48, dhcp6c will combine the two values into a single IPv6
   prefix, 2001:db8:ffff:1::/64, and will configure the prefix on the specified
   interface.

  .. code-block:: none

    set interfaces {{ var0 }} {{ var1 }} dhcpv6-option pd 0 interface eth0.10 sla-id 1