[dns-wg] Re: Re: IPv6 glue AAAA RRs in the root zone

>>>>> "Joao" == Joao Damas <Joao_Damas at isc.org> writes:

BN: cc list has been trimmed as everyone there is already on dns-wg at ripe.net

    >>> Well, what other choice is there? :-) And anyway, since the
    >>> overwhelming bulk of the world's name servers are IPv4-only,
    >>> resolution over IPv6 doesn't seem to be a particularly
    >>> productive exercise.
    >>  True enough.

    Joao> True enough for what subset of users?  If the a user is
    Joao> interested in only a few and those provide the service that
    Joao> user needs and uses, what does he/she care about a million
    Joao> servers out there?

It's not that simple Joao. If only it could be that simple... 

Have you forgotten the IPv6 migration issues that Johan Ihren and
others have mentioned at previous WG meetings? Some IPv6 users will
drop DNS over IPv4 as soon as they see AAAAs for TLD name servers. Or,
worse, for the root servers. They may not realise or understand that
this will cut them off from most of the internet. Which you seem to be
saying is fine. If all they're interested in is the IPv6 internet, let
them just get access to that. I'd agree with that sentiment if we knew
for sure we were talking about informed, knowledgeable users. But I'm
not convinced that's the case.

Even so this approach brings more problems. Firstly, it highlights the
lack of a migration strategy for introducing DNS over IPv6. We still
don't know what's going to break, how those failures will manifest
themselves and what the consequences of that will be. Both for
applications/resolvers and for name servers. For instance, what will
my IPv6 web browser do when lookups over IPv6 for www.google.com
return only A records? Or SERVFAIL? Second of all, a piecemeal
introduction of AAAA glue could be destablising for the DNS and the
internet. We just don't know either way, so we should proceed
carefully with a good understanding of the consequences of these
changes. Thirdly, this could also put pressure on other TLDs to add
AAAA glue -- "because others are doing this" -- before they're ready
to do so. Finally, by encouraging the IPv6-only people to go off into
their own little world, we fragment the internet and its name
space. At the very least, it will mean some IPv6-ers are likely to
develop a mindset that DNS migration to IPv6 is done and there's
nothing more for them to do as far as IPv6 and the DNS is concerned.