load balancing, sort of

We've got two servers. Nr1 (Linux) is the main one, Nr2 (W2K) just mirrors a few sites and databases and is used for backup.

Now what I would like is, in case Nr1 is stressed out or (taken) offline, to forward visitors to Nr2. I've looked at DNS Round-Robin, but that's not what I really want. Nr2 should only be used in case Nr1 can't handle the load, for whatever reason.

Any ideas on how to accomplish such a thing?

Thanbks load balancing, sort of

 

 

 

 

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