TechLibrary

Navigation Back up to About Overview

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