Issues on renumbering

RFC 2894: IPv6 Router Renumbering Protocol
implementation exists, but less experience.
highly dependent on multicast routing
deployment/availability issue.
(a bit) dependent on site-local addresses
not effective in the "consolidation model"
identifiers inside SLAs may conflict.

configurations using "raw" addresses may have to be renumbered.
DNS configuration.
server address, database
address based packet filtering
configuration of route aggregation

possibility and applicability of auto-renumbering
it is sometimes impossible in theory.
e.g. when topology changes.
do we really want to renumber every configuration automatically?
trade-off between convinience and policy/security.