Having looked at this a few months ago when one of our partners was (briefly) returning NOTIMP for ANY queries, I find myself wondering why this isn't discussed in the draft?
The draft does talk about *new* RCODEs, but not existing ones. My reading of RFC 1035 is that it would be a perfectly appropriate response from a server that doesn't support ANY. Unfortunately the retry semantics of DNS are not well specified and therefore implementation differences may occur. If as a result NOTIMP is really not usable then IMHO this should also be documented. Ray _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop