Complete the following tasks to replace a subscriber node or dedicated TFTP server (or another server type that is not a
Cisco Unified Communications Manager server). A dedicated TFTP server is a node with
Cisco Unified Communications Manager installed but with the
Cisco Unified Communications Manager service disabled. The TFTP service runs as a dedicated TFTP server for the cluster.
If you are also replacing the publisher node, you must replace it before replacing or reinstalling any other nodes. If the cluster uses backup subscriber nodes, replace or reinstall all backup subscriber nodes before replacing or reinstalling primary subscriber nodes.
You can replace all backup subscriber nodes at the same time if this does not cause outages or oversubscription of primary subscriber nodes. You can replace all primary subscriber nodes at the same time if this does not cause outages or oversubscription of backup subscriber nodes.
Follow the references in the For More Information column to get more information about a step.