9.2.1 and allow-v6-synthesis

[Mark_Andrews at isc.org]

> I've just trying to set up A6 records to see how they work. The
> resolver libraries my clients have don't support A6 records, so I
> tried turning on "allow-v6-synthesis". When I did this the nameserver
> slowed to a crawl (so slow that most queries timed out)!
> 
> Commenting out the allow-v6-synthesis line in the options section
> makes everything happy again. This is with 9.2.1 on FreeBSD-4.5.
> Is this a known problem?
> 
> 	David.
> 

	Did you start simple or dive in the deep end with
	complicted A6 chains?  An A6 chain can take thousands
	of queries to resolve.

	Start with:

	A6 0 <ipv6-address>

	And work up to more complicated examples.

	Mark
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org