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_tat...@isc.org > wrote: > At Thu, 29 Jan 2009 15:39:01 +0000, > Luis Silva <luisfilsi...@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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