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    Selecting the Method of Obtaining IPv6 Prefixes

    You can set up the BNG to select IPv6 prefixes through one of the following methods:

    • An external source such as a AAA RADIUS server or a DHCP server using the DHCPv6 relay agent.
    • Dynamic assignment from a local pool of global IPv6 addresses or prefixes that is configured on the BNG

    Using a AAA RADIUS Server to Obtain Global IPv6 Addresses and IPv6 Prefixes

    Table 1 describes the RADIUS attributes used in a dual-stack network. These attributes are sent from the RADIUS server to the BNG in RADIUS Access-Accept messages.

    Table 1: RADIUS Attributes Used to Obtain Global IPv6 Addresses and IPv6 Prefixes

    RADIUS Attribute

    Address Assignment Type

    Attribute Description

    Framed-IPv6-Prefix

    NDRA

    IPv6 prefix with a prefix length less than 128.

    DHCPv6 IA_NA

    IPv6 prefix with a length of 128.

    Framed-IPv6-Pool

    NDRA

    Name of an NDRA pool configured on the BNG from which the BNG selects a prefix.

    DHCPv6 IA_NA

    Name of an address-assignment pool configured on the BNG from which the BNG selects a global IPv6 address.

    Delegated-IPv6-Prefix

    DHCPv6 prefix delegation

    IPv6 prefix.

    Jnpr-IPv6-Delegated-Pool-Name

    DHCPv6 prefix delegation

    Name of an address-assignment pool configured on the BNG from which the BNG delegates a prefix.

    Published: 2012-11-29