/mcpError Message %UC_ILS-2-ILSTCPInUse: %[PortNumber=UInt][AppID=String][ClusterID=String][NodeID=String]: ILS failed while initializing a TCP port because the port is already in use.. Explanation This alarm indicates that ILS was unable to bind to a TCP port because the port is already in use. It will occur during service startup if the ports that ILS tries to initialize are already in use. ILS will terminate when this error occurs. Recommended Action Make sure that no other services have been configured to use the same ports that ILS has been configured to use. Correct the problem and restart ILS. Error Message %UC_ILS-2-ILSTCPListenError: %[PortNumber=UInt][AppID=String][ClusterID=String] [NodeID=String]: ILS failed while initializing a TCP port.. Explanation This alarm indicates that ILS was unable to initialize a TCP port. It will occur during service startup when it tries to initialize TCP ports. ILS will terminate when this error occurs. Recommended Action Consult the diagnostics for details. Error Message %UC_ILS-3-ILSRemoteHostUnresponsive: %[ClusterId=String][ConnectionDetail=String] [AppID=String][ClusterID=String][NodeID=String]: No response from host at remote cluster.. Explanation ILS was able to establish a connection but the remote host was unresponsive. The connection has been dropped and ILS will periodically re-attempt to connect to remote 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 Verify the ILS configuration at the remote cluster. Check the remote cluster's syslog for additional details. Diagnose any network issues between the two IP addresses provided in the connection details of this alarm. Error Message %UC_ILS-3-ILSUnacceptableConnectionAttempt: %[Reason=String][ConnectionDetail=String] [AppID=String][ClusterID=String][NodeID=String]: A connection from a remote ILS server has been rejected.. Explanation ILS received a connection attempt that was not acceptable. The connection has been dropped. Typically this alarm indicates a misconfiguration or incompatibility of ILS between the local and remote clusters. Recommended Action Use the reason message provided to further diagnose the issue. The connection details will include the IP address of the remote ILS. Error Message %UC_ILS-3-ILSProtocolVersion: %[ClusterId=String][ConnectionDetail=String][AppID=String] [ClusterID=String][NodeID=String]: Incompatible ILS protocol used by remote cluster.. Explanation ILS protocol used by remote system is not compatible with the local cluster. The connection has been dropped. Recommended Action Upgrade the lower version component so that both clusters use the same or compatible version. 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 115/343