referral doubt

[Luis Silva]

Tks a lot for the answer. It really helped understanding this process. But
just a simple question. What happens if the
"ns1.testing.server.com<http://ns1.testing.server.com/>A
192.123.123.23" doesn't responds? will it try to get the others?

Regards,
Luis

On Thu, Jan 29, 2009 at 8:12 PM, JINMEI Tatuya / 神明達哉 <Jinmei_Tatuya at isc.org
> wrote:

> At Thu, 29 Jan 2009 15:39:01 +0000,
> Luis Silva <luisfilsilva at gmail.com> wrote:
>
> > I have a question related with the contacting external servers.
> > If my server receives an referral answer from an external server with 3
> NS
> > records but just 1 A additional record, what is the normal behaviour? is
> the
> > server supposed to resolve all 3 nameservers or continues with the
> iterative
> > process contacting the server that have the additional A record.
>
> I don't know what's "normal", but BIND9 should continue with the
> process with the server that has an address (while trying to resolve
> addresses of other NSes).
>
> > For example:
> > Trying to resolve www.testing.server.com
> > When contacting "server.com" nameserver I receive in the answer 3 NS and
> 1 A
> > Additional record:
> > testing.server.com NS ns1.testing.server.com
> >  testing.server.com NS ns2.testing.server.com
> >  testing.server.com NS ns3.testing.server.com
> > ns1.testing.server.com A 192.123.123.23
>
> In this case BIND9 should immediately send a subsequent query to
> 192.123.123.23.
>
> ---
> JINMEI, Tatuya
> Internet Systems Consortium, Inc.
>
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