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RADIUS Support for Dynamic Router Advertisement
The AAA Service Framework enables you to use RADIUS to select the router advertisement prefix used in a subscriber session’s dynamic router advertisement configuration.
When a subscriber connects to an interface, the AAA Service Framework selects the router advertisement prefix based on the following order:
- IPv6-NdRa-Prefix attribute specified in the RADIUS authentication grant—If the AAA Service Framework receives the IPv6-NdRa-Prefix attribute [VSA 26–129] in the RADIUS Access-Accept message, the router uses the returned VSA value.
- IPv6-NdRa-Pool-Name attribute specified in the RADIUS authentication grant—If the AAA Service Framework receives the IPv6-NdRa-Pool-Name attribute [VSA 26–157] in the RADIUS Access-Accept message, the router is allocated a prefix from the locally configured address-assignment pool that matches the returned VSA.
- Local configuration—If neither attribute is returned in the RADIUS authentication grant, the AAA Service Framework allocates the router a prefix from the locally configured address pool that is designated for the Router Advertisement protocol on the router.
