/mcpReal-Time Reporting Tool (RTMT) and check the Replication Status in the Database Summary page. If status shows 2, then replication is working. Check network connectivity to the server that is running the database. If your system uses DNS, check the DNS configuration for any errors. If the cause is still not identified, collect SDL and SDI traces and contact the Cisco Technical Assistance Center (TAC). Error Message %UC_ILS-3-ILSTLSAuthenticationFailed: %[Cluster1=String][AppID=String][ClusterID=String] [NodeID=String]: TLS authentication failure to cluster in this ILS network. Explanation A TLS connection to a cluster in the ILS network could not be established, mostly likely because of a problem with the certificate presented by the publisher Unified CM in the remote cluster. (For example, not in the Unified CM CTL, or is in the CTL but has expired). Recommended Action Verify that the certificate of the remote cluster Unified CM is installed and configured properly on the local Unified CM. Error Message %UC_ILS-3-ILSPwdAuthenticationFailed: %[IPAddress=String][AppID=String][ClusterID=String] [NodeID=String]: Password authentication failure to cluster in this ILS network. Explanation A password authentication failure has occurred on a connection to a remote cluster. Recommended Action Verify that ILS at the remote server is configured to use password authentication. Reenter the ILS password if needed. The ILS password must be identical at all clusters that will participate in the same ILS network. Error Message %UC_ILS-3-ILSDuplicateClusterID: %[EntClusterID=String][AppID=String][ClusterID=String] [NodeID=String]: Duplicate Enterprise Cluster ID found in ILS network. Explanation A duplicate Enterprise Cluster ID has been found in this ILS network. Recommended Action Check that the Enterprise Cluster ID is not set to the default value. Assign each cluster in the ILS network a unique Enterprise Cluster ID. Error Message %UC_ILS-3-ILSHubClusterUnreachable: %[HubCluster=String][ConnDetails=String][AppID=String] [ClusterID=String][NodeID=String]: Hub cluster unreachable.. Explanation This alarm indicates that the ILS was unable to reach the remote hub cluster. ILS will periodically re-attempt to connect to the hub cluster. If the condition is due to a temporary Internet connectivity issue, the problem will self-repair. However, if it is due to a persistent condition, action must be taken. Recommended Action Make sure ILS is activated and running at the remote hub cluster. The hostname and IP address that ILS attempted connection to are included in the alarm. Verify that your firewall configuration is allowing the ILS access to the remote server. Try pinging the configured IP address of the remote server, and diagnose any network issues from there. 5/24/26, 3:34 AM System Error Messages for Cisco Unified Communications Manager 15 - Cisco https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/err_msgs/15_x/ccmalarms15.html 114/343