Failing over to a backup validor

Hi Casper friends!

I would like to set up a second validator as a backup for the active one.
Would it be enough to switch the public and private key from the first and second server and restart the service in both of them?
Or would it be necessary to use a VIP address (as I suspect the validation contract is attached to a particular IP)?

Thanks in advance!


This is the instruction moving a node.

Btw, can you join discord Casper for future issues/problems?
We are actively working there most of the time.