DNS failover for backup ISDN connection

[David Botham]

> -----Original Message-----
> From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On
> Behalf Of Sean
> Sent: Monday, August 12, 2002 5:33 PM
> To: comp-protocols-dns-bind at isc.org
> Subject: DNS failover for backup ISDN connection
> 
> 
> I'm looking for a dns failover solution that would solve our redundant
> Internet connection issues.  I'm hosting a web server and have a
> single Internet connection and I would like to add a backup isdn line
> (from a separate provider) that would only become active when the dsl
> line is down.  As seamlessly as possible I would like for our clients
> to continue connecting to our web site.

You may look for a solution that is outside the realm of DNS.  Look at
Radware's LinkProof, or other comparable product.  When ever possible, I
would suggest not using DNS to perform load balancing / high
availability for other services...


Dave...



> 
> I would like for the isdn line to never be used unless the dsl line
> goes down.  How can this be accomplished?  I've looked at IP failover
> services like the one that ZoneEdit offers but that would require our
> clients to only specify ZoneEdit's DNS servers in their tcp/ip
> settings.  I've also looked at dsn round robin which could result in
> some error messages ('page not found', etc.) for our clients.
> 
> Any help would be greatly appreciated.
> 
> Thank you.
> Sean