/mcpresponse from the remote peer as defined in SIP RFCs (Remote) or based on a reason code provided by Unified CM (Local). Examples of possible reason codes include Remote=503 ("503 Service Unavailable" a standard SIP RFC error code), Remote=408 ("408 Request Timeout" a standard SIP RFC error code), Local=1 (request timeout), Local=2 (local SIP stack is not able to create a socket connection with the remote peer), Local=3 (DNS query failed). For Local=3, IP address in Alarm will be represented as "0" and when dns srv is configured on SIP trunk then port will be represented as "0". Recommended Action Available peer list is for notification purpose only; no action is required. For each unavailable peer, complete the following steps depending on the reason code provided in this alarm. For Remote=503, possible reasons include 1) route/sip trunk for originating side doesn't exist on remote peer; 2) route/sip trunk for originating side does exist on the remote peer but the port is either used for a SIP phone or a different sip trunk; 3) the remote peer has limited resources and may not be able to handle new calls. For the first cause (item 1), if the remote peer is Unified CM, add a new SIP trunk in Unified CM Administration for the remote peer (Device > Trunk) and make certain that the Destination Address and Destination Port fields are configured to point to the originating host (the originating host is the same node on which this alarm was generated). Also ensure the new SIP trunk has the incoming port in associated SIP Trunk Security Profile configured to be same as originating side SIP Trunk destination port. For the second cause (item 2), if the remote peer is Unified CM, then in Unified CM Administration for the remote peer (Device > Trunk) make certain that incoming port in associated SIP Trunk Security Profile is configured to be same as originating side SIP Trunk destination port. For the third cause (item 3), if the remote peer is administered by a different system administrator, consider communicating the resource issue with the other administrator. For remote=408, possible reason includes remote is running low in resources and unable to process the request. If the remote peer is administered by a different system administrator, consider communicating the resource issue with the other administrator. For Local=1, possible reason could be that no responses has been received for Options request after all retries when transport is configured as UDP in SIP trunk Security Profile assigned to the SIP trunk on originating side. To fix this issue, if the remote peer is Unified CM, then go to remote peer Serviceability web page and then Tools -> Control Center (Feature Services) and make sure Cisco Call Manager service is activated and started. Also, go to remote peer admin web page and then to Device -> Trunk and do a find and make sure that there is a SIP trunk exist with incoming port in associated SIP Trunk security profile configured to be same as what is configured on originating side SIP Trunk destination port. Also, check the network connectivity using the CLI command "utils network ping remote_peer" at originating side. For Local=2, possible reason could be that Unified CM is not be able to create socket connection with remote peer. To fix this issue, if remote peer is Unified CM, then go to remote peer Serviceability web page and then Tools -> Control Center (Feature Services) and make sure Cisco Call Manager service is activated and started. Also, go to remote peer admin web page and then to Device -> Trunk and do a find and make sure that there is a SIP trunk exist with incoming port in associated SIP Trunk security profile configured to be same as what is configured on originating side SIP Trunk destination port. Also, check the network connectivity using "utils network ping remote_peer" at originating side. For Local=3, possible reason could be DNS server is not reachable or DNS is not properly configured to resolve hostname or SRV which is configured on local SIP trunk. To fix this issue, go to OS Administration web page and go to Show -> Network and look into DNS Details and make sure it is correct. If not then configure correct DNS server information using CLI "set network dns primary" command. Also, check the network connectivity with DNS server using "utils network ping "remote_peer" and make sure DNS server is properly configured. Error Message %UC_CALLMANAGER-3-ConnectionFailure: %[DeviceName=String][IPAddress=String] [{Optional}DeviceType=Enum][{Optional}Description=String][Reason=Enum][IPV6Address=String] 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 231/343