Primary/Secondary DNs - Fault tolerance

[Len Conrad]

>I have 2 DNS servers, and two web servers on different ISP's.  I am
>trying to set it up so that if one ISP goes done, the secondary dns
>will be in effect and transfer to the secondary web server

Nothing is "transferred" in the case of one DNS becoming 
unreachable.  If zone have been transferred and in sync, then the 
reachable DNS's will answer.

>instead of the primary.

This action depends on the resolvers checking all NS's for zone, not 
on any behavior of your DNS's.

>The problem is that secondary dns will only act as a slave.

to the outside world, all NS records auth for a zone are equals. the 
master/slave, primary/secondary is behavior restricted among BIND machines.

>Any ideas on how to work this situation?  please respond via
>email

MS resolvers are known not to try any but the first NS.  Ask MS to 
fix their software.

Len


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