/mcpDescription Restriction The extension mobility service in participating clusters performs a periodic remote cluster update. The Remote Cluster Update Interval feature parameter controls the update interval. The default interval is 30 minutes. If the extension mobility service on clusterA does not receive a reply from a remote cluster (such as clusterB) for this update, the Remote Cluster window for clusterA shows that the Remote Activated service is set to False for clusterB. In this case, the visiting cluster does not receive any response from the home cluster and sets the Remote Activated values for the home cluster to False. During this interval, a visiting phone may not be able to log in by using EMCC. The visiting phone receives the “Login is unavailable” error message. At this point, a login attempt to EMCC from a visiting phone can fail; the phone displays the “Login is unavailable” error message. This error occurs because the visiting cluster has not yet detected the change of the home cluster from out-of-service to in-service. Remote cluster status change is based on the value of the Remote Cluster Update Interval EMCC feature parameter and on when the visiting extension mobility service performed the last query or update. You can select Update Remote Cluster Now in the Remote Cluster Service Configuration window (Advanced Features > EMCC > EMCC Remote Cluster) to change Remote Activate values to True, which also allows EMCC logins. Otherwise, after the next periodic update cycle, EMCC logins by visiting phones will return to normal. Visiting Device Login Limitations EMCC Login Result for Different Cluster Versions with loginType The following table shows the login result of the Extension Mobility Cross Cluster feature for different cluster versions when the loginType parameter is used in the service URL. Table 39: EMCC Login Result for Different Cluster Versions with loginType EMCC Login Result loginType in Visiting Cluster EM URL* Home Cluster Version Visiting Cluster Version Success Not mentioned (Default URL) 12.0 12.0 Success UID, SP, or DN 12.0 12.0 Success Not mentioned (Default URL) 11.5 and below 12.0 Fail Fail with error code - 1 ** UID, SP, or DN 11.5 and below 12.0 Success Not mentioned (Default URL) 12.0 11.5 and below Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 445 Receiving Calls Extension Mobility Cross Cluster Restrictions