I think you follow Nanog, and the recent lawsuit filed over renumbering.
Plaintiff claimed they didn't have enough time to renumber.
What does one stupid company after themselve creating situation where they
forced their biggest client out and then wanting to hurt their former client
as much as possible, but can't because of court order, and now crying
"wolf" (did they look at the mirror?) in public has anything to do with
standards for renumbering?
When you renumber you have to change dns zones, you already have ip addresses
in each zone that likely need to be changed. Adding one new line with ips
that need to change will not change things much. Its either if you have
to change zone or not that makes a different, but if you already do, its
matter of proper scripting.
Also, UUnet gives 6 months standard to return address space--personal
experience. Specific enough?
UUNET gives 12 months or more to renumber. ARIN gives 12 months to renumber
Other ISPs have their own standards (usually less then 12 month). European
people said their "unpublished" standards is up to 6 months AFTER client
already left that they can continue to use old ip addresses and renumber.
--
William Leibzon
Elan Networks
william(_at_)elan(_dot_)net