IPv6 prefix learning enables the creation of data-triggered IPv6 prefix-based hosts by learning prefixes from source IPv6 addresses of data-trigger packets where the prefix lengths are specified in LUDB or AAA.
IPv6 prefix learning is enabled with the following LUDB configuration conditions.
There are no ipv6-address, ipv6-delegated-prefix, or ipv6-slaac-prefix matching data-triggers in the LUDB host entry.
The ipv6-delegated-prefix-length is defined in the LUDB host entry.
IP prefix learning from AAA is enabled with the following conditions.
There are no Delegated-IPv6-Prefix, Framed-IPv6-Prefix, or Alc-IPv6-Address AVP-matching data-triggers in the Access-Accept or the AA-Answer responses.
Delegated-IPv6-Prefix AVP exists in the Access-Accept or the AA-Answer responses.
DHCP promotion is also supported on the data-triggered host created with IPv6 prefix learning.