Perform the following tasks during a maintenance window, in the order that they are listed.
You must perform the tasks in the order that they are listed in this table. Some tasks link to procedures in other parts of the guide. When you reach the end of a procedure, refer back to this table to determine what you must do next. Failure to perform upgrade tasks in the order listed in this table can cause the upgrade to fail.
Configure the Cisco Voice Gateway dial-peer priority
Reverse the Cisco IOS Enterprise Ingress Voice Gateway dial-peer priority configuration so that calls are sent to the Side A Unified CVP server first and then to Side B.
Change the Unified CVP scripts as required so they do not point to DNs and labels on Unified CVP Server 2B.
Bring down Side B
On each of the following VMs, select Unified CCE Service Control on the desktop. Stop the Unified CCE services and change Startup to Manual:
Side B Unified CCE Call Server
Side B Unified CCE Data Server
External HDS with Side B as the Central Controller preferred side (if used)
Power off the Finesse Secondary node VM in the vSphere client.
Power off the Unified Intelligence Center Subscriber VM in the vSphere client.
Transfer the Unified CVP scripts and media files to the gateways that are not currently in use on Side A.