Re: CIDR FAQ

[Yakov Rekhter <yakov () cisco com>]

Paul,

> New allocations are (as of 1466bis) being done through providers, on CIDRized
> lines.  Whether IPv4 or IPv6, new allocations are not going to badly impact
> the core routing table size.

Does that mean that all the internet registries no longer allocate
/24 (or longer) prefixes that have nothing to do with the actual
Internet topology (these prefixes aka "portable addresses") ?  Perhaps
folks from various Internet registries would be able to answer this
question.

> I've seen no evidence that IPv6 addresses will be allocated on anything other
> than CIDR lines. There are crackpots who think otherwise, but there are alwa
ys
> crackpots.  

Current IPv6 address allocation documents *explicitly* allow for
non-provider based allocations. What makes you to think that such
allocations would *not* be used.

> CIDR works.  

CIDR works as long as addresses are assigned in a topologically
significant fashion. And this precondition is crucial.

Yakov.