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Cisco Bug: CSCvv43479 - [BP-CUPS]: Assertion failure at egtpc_handle_delete_bearer_req_evt leading to 30% call-drop

Last Modified

Oct 12, 2020

Products (1)

  • Cisco PGW Packet Data Network Gateway

Known Affected Releases

21.18.11 21.18.8.private 21.21.0 21.21.G0.77111

Description (partial)

Symptom:
Assertion failure at egtpc_handle_delete_bearer_req_evt

  Stack (131071@0x0xff9ab000, probably truncated):
    [ffffe430/X] __kernel_vsyscall() sp=0xff9ab658
    [0d101f27/X] sn_assert() sp=0xff9ab6b8
    [08c1749a/X] egtpc_handle_delete_bearer_req_evt() sp=0xff9abb88
    [08c2268d/X] egtpc_handle_user_sap_event() sp=0xff9ac7d8
    [059b40ed/X] pgw_drv_send_delete_bearer_req_to_egtpc() sp=0xff9ad098
  Last Bounce:

Conditions:
As part of pure P to collapse , PGW received MBrequest while egtpc in MBR pending state.
When PGW processing the MBR, sx Modify got filed with below reason Usage Report Failing and PGW is triggering delete bearer request towards egtpc.
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