If you are upgrading servers in a cluster, disconnect the ethernet cable on each server before it comes on line with the new version. Then stop the CallManager service. Once the service is stopped, you can reconnect the ethernet cable. Otherwise, you will end up with two different CallManager versions running within a cluster. Restart the CallManager service on all of the servers when the upgrade is complete.
Caution Be certain to restart the publisher first.
Wait until it is fully operational before restarting the remaining servers in the cluster. Cisco Systems Inc. All rights reserved. Important Notices and Privacy Statement .