DNS question from a network guy

Mark_Andrews at isc.org Mark_Andrews at isc.org
Tue Jan 21 20:48:21 UTC 2003

> I am not a DNS guru.  I did search the archives first...
> If you have two or more records for a host, DNS will use round robin in its
> replies... What is the behavior if you delegate a domain, for instance
> www.mydomain.com to two name servers?
> in the mydomain.com name server...
> www   in    ns    ns3.mydomain.com
>            in    ns    ns4.mydomain.com
> ns3        in    a
> ns4        in    a
> Thanks in advance for any help.
> David

	Well they will be handed out in the order specified in named.conf.
	The caching servers will use which ever nameserver that responds
	fastest.  The rtt estimates will be computed as a side effect of
	normal query traffic.

Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org

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