BIND 8.4.5 as cache server, long delay to resolve some domains...

JINMEI Tatuya / 神明達哉 jinmei at
Wed Jan 26 18:07:34 UTC 2005

>>>>> On Wed, 26 Jan 2005 17:22:19 +0200, 
>>>>> "rene mathis" <rene at> said:

> Before I was using BIND 9.2.1 (and 9.2.3) and there the Name Server was
> sometimes waiting for 2 seconds before sending a recursive query to another
> nameserver on the internet (not only root servers).

This is perhaps due to a known problem that the BIND9 caching server
can try to use IPv6 transport (with a 2-sec-or-more delay) even when
the server itself does not have IPv6 connectivity.  A workaround is to
use the -4 option of BIND 9.3.x (if you don't need IPv6 transport).  A
more essential fix will appear in BIND 9.3.1 (it's already available
in 9.3.0beta2)

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei at

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