Query regarding NS record

[Kevin Darcy]

Are you talking about recursive clients failing over?

Or other nameservers trying to talk to yours, non-recursively?

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).

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.

                                                                         
                                                                         
                                     - Kevin

On 9/16/2011 11:17 AM, babu dheen wrote:
> Hi,
>     Can anyone let me know how i can resolve the below requirement.
> Requirement:
> 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?
> For example, my company mail website is; mail.mycompany.com which is 
> pointed as below in ISP name server.
> mail.mycompany.com    IN    NS    ns1.mainoffice.com
> mail.mycompany.com    IN    NS    ns1.branceoffice.com
>   Is the above record is correct or not?
>  Please suggest.
> Regards
> papdheen M
>
>
> _______________________________________________
> Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list
>
> bind-users mailing list
> bind-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/bind-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/bind-users/attachments/20110918/d9682c5b/attachment.html>