On 11-jul-2005, at 12:22, john(_dot_)loughney(_at_)nokia(_dot_)com wrote:
The way I understand it, an RFC is only historic(al) if the
defines is no longer in use.
Well, as Iljitsch mail pointed out, some things (3152 Delegation of
are moved to Historic when the IETF wants people to stop using
For the record:
RFC 3152 basically just says "we now use ip6.arpa rather than ip6.int
for IPv6 reverse DNS" and points to RFC 2874.
RFC 2874 wants us to use bit labels for the reverse DNS (which is
very cool but unfortunately isn't backward compatible and requires
not just a new resource record but a partial rewrite of the software
used in pretty much all DNS servers). RFC 2874 is "experimental" but
that's just pretense, as there aren't currently, nor have there ever
been any bitlabel delegations under ip6.arpa, as far as my research
has been able to uncover.
(RFC 1886 specified the "nibble" format with ip6.int, which looks
So RFC 3152 was never "practice", the alleged practice isn't
"current", and I'll refrain from commenting on "best".
RFC 3596 ("draft standard") finally cleans the whole mess up for the
most part by saying in so many words that people should use the
nibble method with ip6.arpa for the IPv6 reverse DNS, but
unfortunately it claims that RFC 3152 was mainly about s/ip6.int/
ip6.arpa/g, ignoring the whole bitlabel/nibble thing.
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