From owner-freebsd-isp  Sat Aug 22 19:58:52 1998
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From: "Jonathan M. Bresler" <jmb>
Message-Id: <199808230258.TAA09700@hub.freebsd.org>
Subject: Re: [Q] what happens when 1 of N nameservers dies?
In-Reply-To: <35DECF3E.47E28B0F@pipeline.ch> from Andre Oppermann at "Aug 22, 98 04:01:34 pm"
To: oppermann@pipeline.ch (Andre Oppermann)
Date: Sat, 22 Aug 1998 19:58:08 -0700 (PDT)
Cc: jmb@FreeBSD.ORG, isp@hub.freebsd.org
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	thanks to everyone for their responses to my question.
	its good to see that "things work as they should" :)

jmb
> 
> Or yes if that nameserver isn't properly *configured*, but that
> depends on how it is screwed up.
> 
> 1. Unreachable (simply no answer, or UDP packet lost)
> 
>    No problem, the resolver asks another one (or again).
> 
> 2. No secondary or primary statement (SOA) for that domain
> 
>    NS returns 'not authorative', the resolver tries the next one.
> 
> 3. Bogus data in secondary (serial # not incremented after changes)
> 
>    This gives clearly problems, because the servers have different
>    information. Pilot error.
> 
> >         does the resolver try one nameserver and if it does not
> >         receive a response try another?
> 
> Yes.
> 
> -- 
> Andre
> 


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