The drift and reconcile (DRC) for IPv6 prefix list is similar to IPv4 prefix list. If you associate a prefix list is with a route map whose association was changed on the device, then the DRC process computes the diff and reports the differences.
Config Drift: Prefix List +-------------+------+-----+-------------------+--------------+ | NAME | TYPE | SEQ | APP STATE | CHILD CONFIG | +-------------+------+-----+-------------------+--------------+ | prefix_2_in | ipv6 | 11 | cfg-entry-added | | | prefix_2_in | ipv6 | 12 | cfg-entry-added | | +-------------+------+-----+-------------------+--------------+ Config Drift: Route Map +-----------+--------+-----+-------------------+--------------------------------+ | NAME | ACTION | SEQ | APP STATE | CHILD CONFIG | +-----------+--------+-----+-------------------+--------------------------------+ | rmap_test | permit | 9 | cfg-entry-added | matchIPv6PrefixList | | | | | | prefix_3_in | | rmap_test | permit | 9 | cfg-entry-deleted | matchIPv6PrefixList | | | | | | prefix_2_in | | rmap_test | permit | 10 | cfg-entry-deleted | matchIPv6PrefixList | | | | | | prefix_3_in | | rmap_test | permit | 10 | cfg-entry-added | matchIPv6PrefixList | | | | | | prefix_2_in | +-----------+--------+-----+-------------------+--------------------------------+