Verify the appliance that requires the network change is not currently the primary appliance, fail over and promote another replica to be the primary before starting the reconfiguration.
1. Unjoin and remove the replica from the cluster.
2. Move appliance to new data center.
3. Reconfigure appliance to use the new ip address.
4. Reconfigure the appliance into the cluster.
Refer to the Administrator guide for detailed steps to enroll / unjoin replica from the cluster.