North American Network Operators Group|
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Re: CIDR FAQ
> > class c nets, which are 2/3 the total. > > Why can' the NIC reallocat the old class c's and use CIDR? They are trying. But you can only lead this horse to water -- we can't take prefixes away, we can only make them harder or more expensive to get routing for. This is a lengthy process, and its success is the only reason we still have a 30,000 element core routing table -- endpoint growth never stopped, but new prefixes are all fairly short, and there has been a nearly corresponding drop in old (long, expensive) prefixes in recent months. As Randy pointed out, though, we've probably about squoze all the water out of the old classC sponge.