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Are you talking about recursive clients failing over?<br>
<br>
Or other nameservers trying to talk to yours, non-recursively?<br>
<br>
Recursive clients don't use NS records at all and you need to
approach the failover problem in a completely different way (e.g.
relying on the client failing over from one resolver IP address to
another, or implementing an Anycast solution).<br>
<br>
If you're talking about nameserver-to-nameserver traffic, then just
publish multiple NS records for the relevant zone(s) and the
nameserver-selection algorithm embedded in every known
iterative-resolver implementation will take care of the
load-balancing and failover; to summarize, faster-responding
nameservers will be chosen over slower-responding ones.<br>
<br>
- Kevin<br>
<br>
On 9/16/2011 11:17 AM, babu dheen wrote:
<blockquote
cite="mid:1316186263.77929.YahooMailNeo@web137303.mail.in.yahoo.com"
type="cite">
<div style="color: rgb(0, 0, 0); background-color: rgb(255, 255,
255); font-family: times new roman,new york,times,serif;
font-size: 12pt;">
<div>Hi,</div>
<div> Can anyone let me know how i can resolve the below
requirement.</div>
<div> </div>
<div> </div>
<div>Requirement:</div>
<div> </div>
<div>We have two offices. One is main office and another one is
remote branch office. Now my company client requirement is
that if main office DNS server is not reachable, all DNS query
should be sent to branch office DNS server. How this can be
acheived using BIND?</div>
<div> </div>
<div>For example, my company mail website is; mail.mycompany.com
which is pointed as below in ISP name server.</div>
<div> </div>
<div>mail.mycompany.com<span class="tab"> <span class="tab"> IN<span
class="tab"> NS<span class="tab"> ns1.mainoffice.com</span></span></span></span></div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab">mail.mycompany.com<span class="tab"> <span
class="tab"> IN<span class="tab"> NS<span
class="tab"> ns1.branceoffice.com</span></span></span></span></span></span></span></span></div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"></span></span></span></span></span></span></span></span> </div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"> Is the above
record is correct or not?</span></span></span></span></span></span></span></span></div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"></span></span></span></span></span></span></span></span> </div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"> Please suggest.</span></span></span></span></span></span></span></span></div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"></span></span></span></span></span></span></span></span> </div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab">Regards</span></span></span></span></span></span></span></span></div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab"><span class="tab"><span
class="tab"><span class="tab">papdheen M</span></span></span></span></span></span></span></span></div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"></span></span></span></span> </div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"></span></span></span></span> </div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"> </span></span></span></span></div>
<div><span class="tab"><span class="tab"><span class="tab"><span
class="tab"></span></span></span></span> </div>
</div>
<pre wrap="">
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</blockquote>
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