<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Got your concern. Will change my setting accordingly. Thanks for your advise.</SPAN></div>
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<div style="RIGHT: auto"><SPAN style="RIGHT: auto">Regards</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto">Babu<VAR id=yui-ie-cursor></VAR></SPAN></div>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Kevin Oberman <kob6558@gmail.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> babu dheen <babudheen@yahoo.co.in><BR><B><SPAN style="FONT-WEIGHT: bold">Cc:</SPAN></B> Florian CROUZAT <gentoo@floriancrouzat.net>; "bind-users@lists.isc.org" <bind-users@lists.isc.org><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday, 17 September 2011 9:26 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: Query regarding NS record<BR></FONT><BR>On Fri, Sep 16, 2011 at 6:57 PM, babu dheen <<A href="mailto:babudheen@yahoo.co.in"
ymailto="mailto:babudheen@yahoo.co.in">babudheen@yahoo.co.in</A>> wrote:<BR>> So when multiple DNS records are available, is it possible to direct all DNS<BR>> queries to first (NS) record always? meaning,<BR>><BR>> mail.myoffice.com IN NS 20.20.20.20<BR>> mail.myoffice.com IN NS 30.30.30.30<BR>><BR>> In the above, is it possible to direct all DNS queries only to 20.20.20.20<BR>> and if this fails, is it possible to direct dns queries to next NS<BR>> server(30.30.30.30)?<BR><BR>I'm not aware of a direct way to do this, but you could do by adding the<BR>address listed in the NS record for the backup server to its interface only<BR>when the primary stops responding. The backup would need to send a<BR>regular query to the primary to know when to add the address.<BR><BR>I really
don't understand why you would want to do this.It mostly complicates<BR>things and reduces robustness. A key in the operation of DNS is to have multiple<BR>servers, all answering and all having identical data for queries from<BR>any particular<BR>source.<BR><BR>Kevin Oberman<BR>Network Engineer -- Retired<BR><A href="mailto:kob6558@gmail.com" ymailto="mailto:kob6558@gmail.com">kob6558@gmail.com</A><BR><BR><BR></DIV></DIV></div></body></html>