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RE: IPv6 reverse lookup - lame delegation?

  • From: Jeroen Massar
  • Date: Tue Feb 10 19:06:54 2004


Mark Andrews wrote:

> 	The correct fix to this will be to just stop making IP6.INT
> 	queries.
> 	The best think that could be done is for the PTB to install
> 	"IP6.INT. DNAME IP6.ARPA." *now*.  This will allow the legacy
> 	resolvers to get a answer and allow vendors to stop shipping
> 	legacy aware resolver in the vague hope that they will get
> 	a answer from IP6.INT that they didn't get from IP6.ARPA.

>From RFC3363:
4.  DNAME in IPv6 Reverse Tree

The issues for DNAME in the reverse mapping tree appears to be
closely tied to the need to use fragmented A6 in the main tree: if
one is necessary, so is the other, and if one isn't necessary, the
other isn't either.  Therefore, in moving RFC 2874 to experimental,
the intent of this document is that use of DNAME RRs in the reverse
tree be deprecated.
- ---->8

It will indeed work, but not work everywhere. Redhat boxes for
instance apparently croak on it. Legacy resolvers might quite
possibly include support for it though so one might be on the
safe side there.

I guess DNAME is getting used more for a purpose for which it
wasn't intended at first ;)


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Comment: Jeroen Massar /