/mcp2 HopCountExceeded - The hop count field in passing User-to-User IE exceeded the maximum value of 10. The reason could be the presence of routing loops across the Unified CM trunk interfaces (PRI, intercluster trunk, and so on). The recommended action is to check that no routing loops exist across the Unified CM trunk interfaces (PRI, intercluster trunk, and so on) and gateway (H.323) devices related to the indicated failed call. By examining trace files and CDR data in all Unified CM nodes and route patterns in gateways (H.323) that are involved in routing of the indicated failed call, you may be able to detect a translation pattern, route list or other routing mechanism that is part of the loop. Update the routing mechanism that resulted in the loop, and then if the looping route pattern was on a Unified CM, reset the affected route list/pattern in an attempt to clear the route loop; if that fails, reset the affected trunk/gateway or if the looping route pattern was on an H.323 gateway, restart the gateway. 3 UserUserIEDropped - The passing UserUserIE is dropped. If the indicated device is an H.323 intercluster trunk then the possible reason could be that the Passing Precedence Level Through UUIE checkbox in the Trunk Configuration window in Unified CM is not enabled; the recommended action is to verify that the Passing Precedence Level Through UUIE checkbox has been enabled. If the indicated device is an MGCP gateway with Device Protocol set to Digital Access PRI, the possible reason could be that in the incoming UUIE message, either the IE ID is not set to USER_USER_IE (126) or the User specific protocol ID value is not set to 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 272/343