Need some recommendations as how to go by when migrating and upgrading from cucm 6.x cluster of 4 servers to 7.x with the hardware replacement. I've got a cisco documentation that describes replacement of one or more nodes in a cluster, however it talks about the version being the same.
I wonder, can the 7.x server retreive/restore from a backup file created from the 6.x server? if not what should be the strategy to accomplish that.
Any ideas would be highly appreciated.