Re: NANOG 40 agenda posted

[John Curran <jcurran () istaff org>]

At 5:20 PM -0700 6/1/07, Vince Fuller wrote:
> Yes, as NAT becomes ubiquitous, a larger number of private networks will
> be behind ever smaller prefixes that are assigned to sites so the per-site
> prefix length will decrease. The logical end state for this would be /32s.
> In some cases, multi-homed end-sites may wish to have those /32s advertised
> into the global routing system. If, on the other hand, those end sites were
> to transition to ipv6, they would instead obtain "PI" /48s and advertise
> those into the global routing system. How is the former any worse than the
> latter?

For multi-homed sites, none.  For the vast majority of singly-homed
end locations, the PA-based sites are all going to aggregate nicely
whereas all those /32's are going to come from wherever someone
can find a single unique address.  No ISP is going to stop serving
clients for inability to get new blocks, and that means that in the IPv4
scenario you've got single /32's of indeterminate origin being routed
by every ISP as things move towards conclusion...

/John