Fail over?

So, how are others doing this? I have a server set up here in my primary data center. We're monitoring a few thousand hosts right now with a large number of custom externals.

I've been tasked with setting up a fail-over or disaster response server in case our primary data center has issues. All of our clients are currently configured to send their messages to the IP address of our primary server.

Now, I could just copy the bb-hosts file to the DR site, but then I would only get the network tests since the clients all report to the primary.

Would I use bbproxy to do this? But if I install bbproxy on the primary, I won't be proxying the messages if my primary goes down... :(

-- Stewart Larsen