On 10 August 2011 11:34, Wilfried Woeber, UniVie/ACOnet <Woeber@cc.univie.ac.at> wrote:
PS: maybe slightly OT, but why was number portability introduced and has become quite popular in the telephone system? Renumbering a phone is "easy", isn't it ;-)
Yes, but there isn't a DNS for Phone Numbers (eNUM doesn't count as it encodes the number in DNS rather than the other way round) that maps addresses for you, if you could use their email address (or other suitable identifier of a person) to make phone calls then you'd be onto a winner and number portability wouldn't be required. Since with IPv6 you are unlikely to be using the IP addresses for anything in day to day use (unlike v4 where you still see lots of manual configuration) and there are explicit functions from an end device to use multiple IP addresses it makes sense to change end user configuration to an automated function. Doing this then makes transition between two blocks of address space (as long as they are the same size) simple (and transparent to the end user). This makes the most import thing that any LIR/RIR can do is to make sure that LIRs are handing blocks of address space out the same size... J -- James Blessing 07989 039 476