True DNS Backup

[Chris Buxton]

On Feb 21, 2008, at 9:58 PM, Gregory Hicks wrote:
> If either network provider fails, but the other remains up, the
> external world will continue to query your servers providing the
> network does what it is supposed to do and provides routes TO your
> servers.  They will try one then the other server.  Whichever one
> provides the 'fastest' (relatively) response time is the one that is
> actually going to get queried.


One point I would add is, all zones must be delegated to all four IP  
addresses for this to work. That generally means giving each name  
server, in this case, two different names, one for each address.

Chris Buxton
Professional Services
Men & Mice
Address: Noatun 17, IS-105, Reykjavik, Iceland
Phone:   +354 412 1500
Email:   cbuxton at menandmice.com
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