To upgrade a subsequent node in the cluster, you must first install the new operating system and the new Cisco Unified Communication Manager application on the first node (Checklist for Upgrading the First Cisco Unified CM Node) and then configure the subsequent node on the first node by using Cisco Unified Communication Manager Administration.
On a subsequent node, you can either install the software version on the disc or retrieve a more recent service release from a remote server. The subsequent nodes will retrieve data from the first node at the end of the installation.
To upgrade a subsequent node in the cluster from Cisco Unified Communication Manager 4.x to Cisco Unified Communication Manager 5.1(1), perform the following steps:
Task
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Task Details (Links) and Notes
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Step 1 |
Using Cisco Unified Communication Manager Administration on the first node, configure the subsequent nodes. |
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Step 2 |
Ensure that the subsequent nodes have network connectivity to the first node. |
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Step 3 |
Install the new operating system and Cisco Unified Communication Manager application from a DVD. |
Install the New Operating System and Application on Subsequent Nodes |
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Step 4 |
If required, upgrade the software to a later service release. |
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Step 5 |
Configure the platform and Cisco Unified Communication Manager. |
Note 
You must complete a successful migration of data on the first node prior to upgrading the subsequent nodes in the cluster.