On Jul 28, 2014, at 8:42 AM, Stephane Bortzmeyer <[email protected]> wrote: >> Quite a few folks usually argue "oh, that's simple: we'll use TCP", > > There are many good reasons to use TCP but, in that case, I do not see > why we need it. First, IPv6 users typically don't use extension > headers and, second, if the problem is in IP, why would changing from > UDP to TCP work?
Because the big issue is fragments: The IPv4 net decreed “Fragment’s don’t really work”. The IPv6 net has decreed “No, really, FRAGMENTS DO NOT WORK”. The solution is to detect and fallback on EDNS0 MTU to retry at 1400B first (rather than directly down to 512b), and properly handle truncation. But you do that, and things do work. _______________________________________________ DNSOP mailing list [email protected] https://www.ietf.org/mailman/listinfo/dnsop
