If I were in this pickle, I would probably opt for a re-install. I forget where I see stuff at, but I know there is a trusted relationship between the primary and workers which is stored in memory at the IP address There may be a way to hack this via restarting the tabadmsvc via the services panel, but I forget the specifics.
In fact, I am in this pickle but not exactly. We are moving our cluster to a new windows domain and I will most likely end up having to do a re-install for this.
There are ways around, but then there is the "safe" option...
Well, the answer is, yes. As long as you use server names (and not ip addresses) throughout, it "just works". Some configuration items (tabadmin set) which include IP addresses (load balancer configuration, for example) can be safely redone after the IP change.
For the record, this was version 9.2.3.