/mcp• Fresh Install with Data Import does not support domain name changes. If DNS is enabled on the publisher node of the destination cluster, the domain name must match the source cluster. If the domain name needs to change, install the destination cluster on the publisher without the DNS enabled and then enable DNS via the CLI after the installation is complete. The subscribers can be installed with the DNS enabled, but ensure that the System > Server entries on the publisher node are correct before installing the subscribers. If you plan to change the hostname and/or IP address during the migration, the System > Server entries must be updated on the publisher node of the destination cluster prior to installing the subscribers. • Fresh Install with Data Import does not support installation with DHCP configuration. If DHCP is enabled on the source cluster, install the destination cluster with Static configuration data and then configure the DHCP later post migration. Important Ensure that all nodes in the cluster are exported to the SFTP server before proceeding with Fresh Install with Data Import. Note Before you begin Ensure that your source version must be Release 10.5 or higher. If your source version is not Release 12.5(1) SU5 or higher, you need to install the latest version of the "ciscocm.DataExport" COP file on each node of the source system. We recommend that you have a single reliable NTP server configured for time synchronization for fresh installations. If you configure multiple NTP servers, configure at least four to ensure that Unified CM can determine a tie breaker when servers provide different time sources. Note Procedure Step 1 Export data from the source cluster publisher node. a) Run the utils system upgrade dataexport initiate CLI command on each node of the desired source system to export the data which can be imported using this procedure. b) Enter the SFTP server information to export the data. c) Enter the node Hostname and IP Address (it is possible to change them at this stage.) d) Run the utils system upgrade dataexport status to track the export status. A new folder is created at the SFTP server with the cluster name: Publisher IP Address. Step 2 Export data from the source cluster subscriber node. a) Run the utils system upgrade dataexport initiate CLI command on each node of the desired source system to export the data which can be imported using this procedure. b) Enter the SFTP server information to export data. c) Enter the node Hostname and IP Address (it is possible to change them at this stage). Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs 76 Installation Methods Install with Data Import