Cisco Bug: CSCup14786 - DDN-cause[error_Ind_rcvd_rnc]frmSGW during IM entry not handled properly
Dec 24, 2016
- Cisco ASR 5000 Series
Known Affected Releases
Symptom: DDN-cause[error_Ind_rcvd_rnc]frmSGW during IM entry not handled properly Conditions: DDN with casue [EGTP_CAUSE_ERROR_IND_RCVD_RNC_ENODE (0x06)] is not handled properly as per the fix provided by the PR CSCum50504 in the below scenario. 1, UE gets Attached to MME successfully. 2, S1-Release procedure is initiated by sending CONTEXT_RELEASE_REQ from eNB to MME. 3, MME forwards RELEASE_ACCESS_BEARERS_REQUEST to SGW and there is no Response from SGW. 4, At this time SGW sends DOWNLINK_DATA_NOTIFICATION to MME with cause EGTP_CAUSE_ERROR_IND_RCVD_RNC_ENODE. 5, Here MME replies back EGTP_DOWNLINK_DATA_ACKNOWLEDGE with cause EGTP_CAUSE_NO_RESOURCES_AVAILABLE. N/w triggered Service Req procedure is not initiated as per the spec. In this case the Expected behavior is MME should abort im_entry procedure and and start im exit procedure.
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