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Configuring Duplicate Prefix Protection for Router Advertisement
If you are using AAA to supply IPv6 prefixes for router advertisement, you can enable duplicate prefix protection to prevent prefixes from being used more than once. If enabled, the following attributes received from external servers are checked:
- Framed-IPv6-Prefix
- Framed-IPv6-Pool
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 will include a termination cause.
To configure duplicate prefix protection:
- Enter the access configuration.[edit]user@host# edit access
- Enable duplicate prefix protection.[edit access]user@host# address-protection
