Bind 9.2.5 and IPv6 fails with client.c:1325: unexpected error: failed to get request's destination: failure

[Mark Andrews]

> Hi,
> 
> I have a very strange problem with a Bind server version 9.2.5 on Fedora 
> Core 3.
> 
> Named listen to one IPv4 address and any IPv6 address. The configuration 
> has been running for many months. No changes where made recently to the 
> configuration except for adding or removing slave zones.
> 
> The symptom is that the server does not answer request to the IPv6 
> address + port UDP 53. It still answers requests to the UDP and TCP port 
> 53 using IPv4 and to the TCP port  53 using IPv6. Using dig on the 
> server, or on any server on the same LAN, leads to the following behavior :
> - dig ns some.domain @IPv4-address : works fine
> - dig +vc ns some.domain @IPv4-address : works fine
> - dig +vc ns some.domain @IPv6-address: works fine
> - dig ns some.domain @IPv6-address: works once or twice immediately 
> after restarting named, fails afterwards
> 
> The logs show the following message :
> Jan 16 23:34:25 named[32125]: failed to get request's destination: failure
> Jan 16 23:34:27 named[32125]: client.c:1325: unexpected error:
> 
> I had a look on client.c around line 1325 but it didn't help much.
> 
> Does someone on the list have an idea on what's wrong ?
> 
> Thanks very much in advance.
> 
> Roland.
> 
> -- 
> Roland Dirlewanger
> CNRS - Délégation Aquitaine-Limousin
> Esplanade des Arts et Métiers - BP 105
> 33402 TALENCE CEDEX
> 
> Téléphone: 05.57.35.58.52, Télécopie: 05.57.35.58.01

	Run 9.3 or 9.4.  They both handle IPv6 a lot better than
	9.2 especially with Linux's broken IPv6 stack.

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