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Duplicate Prefix Protection for NDRA
If you are using AAA to supply IPv6 prefixes for NDRA, you can enable duplicate prefix protection for NDRA. If enabled, the BNG checks the following attributes received from external servers:
- Framed-IPv6-Prefix
- Framed-IPv6-Pool
The router then takes one of the following actions:
- If a prefix overlaps with a prefix in an address pool, the prefix is taken from the pool if it is available.
- If the prefix is already in use, it is rejected as unavailable.
- If the prefix length requested from the external server does not match the pool’s prefix length exactly, the authentication request is denied. If configured, the Acct-Stop message includes a termination cause.
