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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: NANOG 40 agenda posted
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
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