servfail are not cached!

[Issam Harrathi]

As i test it's not cached at all, and you say here it's cached for 30
seconds?!
i'm using 9.7.2-P3.

2011/9/27 Evan Hunt <each at isc.org>

> > I discover that servfail are not cached. is it normal?
>
> Yes, that's normal.
>
> Temporary negative caching of SERVFAIL responses for a limited period (up
> to 30 seconds, if I recall correctly) is permitted by the DNS protocol,
> and we've discussed implementing it in BIND9, but haven't had time yet.
>
> --
> Evan Hunt -- each at isc.org
> Internet Systems Consortium, Inc.
>
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