Problem resolving domain

Barry Margolin barmar at alum.mit.edu
Mon Jan 27 15:47:06 UTC 2020


In article <mailman.373.1580138823.733.bind-users at lists.isc.org>,
 Stephan von Krawczynski <skraw.ml at ithnet.com> wrote:

> Hello all,
> 
> I ran across a question I did not really expect. I am using bind 9.14.1 as
> normal, standalone nameserver. When trying to resolve a certain domain I get a
> SERVFAIL (with nslookup). Deeper inspection of the problem shows that the
> domain uses 2 nameservers, where one works perfectly well, the other does not
> know the domain at all.
> I would have expected that bind finds the domain by using the working
> nameserver and ignoring the dead one. But obviously it does not.
> Did I misconfigure something? I thought both nameservers should be questioned
> and the first working result be used, or not?

Not quite.

It performs failover if the first nameserver doesn't respond. But if it 
gets a response, it uses the response, even if it reports an error.

-- 
Barry Margolin
Arlington, MA


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