/mcpDescription EMCC Parameter Specify the number of seconds that Unified Communications Manager waits between sending or receiving KeepAlive messages or acknowledgments between two clusters over EMCC RSVP SIP trunks. An EMCC RSVP SIP trunk is a SIP trunk that has Cisco Extension Mobility Cross Cluster configured as the Trunk Service Type and that has been selected as the SIP Trunk for RSVP Agent in the Intercluster Service Profile window. When two of these intervals elapse without receipt of a KeepAlive message or an acknowledgment, Unified Communications Manager releases the RSVP resources with the remote cluster. The default value is 15 seconds. Valid values range from 1second to 600 seconds. RSVP SIP Trunk KeepAlive Timer Choose the default server name or IP address of the primary node in this local cluster that has the Cisco Extension Mobility service activated. The remote cluster accesses this node to get information about this local cluster. Default Server For Remote Cluster Update Choose the default server name or IP address of the secondary node in this local cluster that has the Cisco Extension Mobility service activated. The remote cluster accesses this node when the primary node is down to retrieve information about this local cluster. Backup Server for Remote Cluster Update Specify an interval, in minutes, during which the Cisco Extension Mobility service on the local node collects information about the remote EMCC cluster. Collected information includes such details as the remote cluster Unified Communications Manager version and service information. The default value is 30. Valid values range from 15 minutes to 10,080 minutes. Remote Cluster Update Interval Configure Intercluster SIP Trunk for Extension Mobility Cross Cluster Configure trunks to process inbound or outbound traffic for intercluster PSTN access and RSVP agent services. You can configure one trunk for both PSTN access and RSVP agent services or one trunk for each service. You do not need more than two SIP trunks for extension mobility cross cluster. Procedure Step 1 From Cisco Unified CM Administration, choose Device > Trunk. Step 2 Click Add New. Step 3 From the Trunk Type drop-down list, choose SIP Trunk. Step 4 From the Trunk Service Type drop-down list, choose Extension Mobility Cross Clusters. Step 5 Click Next. Step 6 Configure the fields in the Trunk Configuration window. For more information on the fields and their configuration options, see Online Help. Step 7 Click Save. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 441 Receiving Calls Configure Intercluster SIP Trunk for Extension Mobility Cross Cluster