Fall back to DNS if node in HOSTS file doesn't respond

I have a server farm in which the servers talk to each other on a private backbone (via hosts files), but the clients talk to the servers on a second NIC via AD/DNS. Is there a way to have the servers fail over to DNS if entries in the hosts files don't
respond (in other words, if the private backbone switch fails)?

1. It depends on node type, DNS suffixes and DNS content.
2. Be aware of problems with multihome domain controller.
http://technet.microsoft.com/en-us/library/cc772564.aspx
Regards
Milos

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