Got your concern. Will change my setting accordingly. Thanks for your advise.
Regards
Babu
From: Kevin Oberman <[email protected]>
To: babu dheen <[email protected]>
Cc: Florian CROUZAT <[email protected]>; "[email protected]"
<[email protected]>
Sent: Saturday, 17 September 2011 9:26 AM
Subject: Re: Query regarding NS record
On Fri, Sep 16, 2011 at 6:57 PM, babu dheen <[email protected]> wrote:
> So when multiple DNS records are available, is it possible to direct all DNS
> queries to first (NS) record always? meaning,
>
> mail.myoffice.com IN NS 20.20.20.20
> mail.myoffice.com IN NS 30.30.30.30
>
> In the above, is it possible to direct all DNS queries only to 20.20.20.20
> and if this fails, is it possible to direct dns queries to next NS
> server(30.30.30.30)?
I'm not aware of a direct way to do this, but you could do by adding the
address listed in the NS record for the backup server to its interface only
when the primary stops responding. The backup would need to send a
regular query to the primary to know when to add the address.
I really don't understand why you would want to do this.It mostly complicates
things and reduces robustness. A key in the operation of DNS is to have multiple
servers, all answering and all having identical data for queries from
any particular
source.
Kevin Oberman
Network Engineer -- Retired
[email protected]
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