On Fri, Nov 4, 2011 at 11:28 AM, Paul Ebersman <list-nanog2@dragon.net> wrote:
It's already been pointed out that lame delegations are more likely problems for many. But the "we'll just pre-fill in-addr to avoid problems" isn't going to work for ip6.arpa. If anyone has enough hardware to serve the zone for a /48 (64k * 4bil * 4bil * bytes-in-record), I'd love to see it. :) [snip] I can serve the zone for a /48 by creating a "sparse" zone. That is... when you ask my DNS server what such and such PTR reverses too, what I don't have a DNS entry for, it can tell you something generic.
There is no need for me to physically create 64k*4bil*4bil on a disk or memory area somewhere. I can make a plugin for my DNS server to hand you the generic result when you ask my DNS server what something reverses to... That is, I can serve you an ephemeral record without requiring an extra byte of storage beyond the life of your query :) -- -JH