Cisco Bug: CSCul98442 - Intermittent Failure in direct ICT e2eRSVP calls.
Mar 04, 2018
- Cisco Unified Communications Manager (CallManager)
Known Affected Releases
Symptom: Intermittent failure in direct SIP Trunk e2eRSVP ICT calls under extended load due to race condition. Conditions: CUCM Version: 10.0.1.10000-24. Topology: Phone-A---------(CM1)----------------SIP Trunk e2eRSVP -------------(CM2)----------------Phone-B. Scenario: Phone-A Calls Phone-B. Phone-B answers the calls. Phone-B gets reorder. Phone-A gets disconnected. Root Cause: When the call is answered by remote endpoint on Cluster-2 , SIPCdpc receives 200-OK. After this , it receives CcSetupCompReq from Cc and SIPBeginMedia from media layer. There is race condition in non-working case case : If CcSetupCompReq is received first , SIPCdpc does not make transition to readyToHandleSIPBeginMedia state and does not handle SIPBeginMedia and SIPReqOffer.
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