On Fri, Sep 16, 2011 at 6:57 PM, babu dheen <babudh...@yahoo.co.in> 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 kob6...@gmail.com _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
