Re: it appears that this whole "ask for AAAA before A" will be painful

[Peter Koch <pk@TechFak.Uni-Bielefeld.DE>]

> -------- to show you that it's not AAAA prejudice, let's look for an RT RR:

Funny enough, try asking for "ANY" ...

> SERVFAIL is the wrong answer.  SERVFAIL is an indication, not that the type
> isn't known, but that the zone is invalid at that server.  recursive servers
> are within their rights to cache SERVFAIL at <ZONE,CLASS>, rather than at
> <NAME,CLASS,TYPE>.  the proper answer to a AAAA or RT question, if there are

And how do they know which zone it is that fails? www.United.COM may be in
a seperate zone below United.COM, so if you receive a SERVFAIL for queries
for www.United.COM you probably can't be sure what to cache anyway. In
addition, not even RFC 2308 defines this type of caching.

> no RR's of that type at that name, is NOERROR/ANCOUNT=0.

One might argue that NOTIMP would also be fine, at least until the "unknown
types" draft goes live. The "ANY" result would remain strange, though.

-Peter

--
to unsubscribe send a message to namedroppers-request@ops.ietf.org with
the word 'unsubscribe' in a single line as the message text body.
archive: <http://ops.ietf.org/lists/namedroppers/>