Jim Reid said:
century? This seems to be storing up trouble for the future and could make it awkward to get reasonable amounts of IPv6 glue deployed. How feasible would it be to mandate or recommend that IPv6-aware DNS clients use EDNS0 to get bigger payloads and complete glue RRsets?
that might be useful but will not solve the problem.
Could we just say "use EDNS0" and be done with it?
Legacy, i.e. EDNS-unaware, clients will continue to use the 512 byte limit, so the servers - unless they call for more load - should be conservative and the zone administrators should be as well. Related to this, IPv6 already has an impact on server load. On our system we already see large amounts of AAAA and A6 type queries (each roughly 85% of the type A count), so I'd really favor a conservative approach. -Peter