You can change the network-level IP address and hostname name of nodes in your deployment for a variety of reasons, including
moving the node from one cluster to another or resolving a duplicate IP address problem. The IP address is the network-level
Internet Protocol (IP) associated with the node, and the Hostname is the network-level hostname of the node.
All Unified Communications products such as Cisco Unified Communications Manager, Cisco Unity Connections, and Cisco IM and
Presence, and so on, have only one interface. Thus, you can assign only one IP address for each of these products.
For changes to other network identifiers, such as the node name and domain name, see the following resources:
System Configuration Guide for Cisco Unified Communications Manager
Configuration and Administration Guide for the IM and Presence Service
Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service
For IM and Presence Service, instructions to change the node name and the network-level DNS default domain name for the node are also included in this