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Cisco Bug: CSCvs06591 - [BP-CUPS]- sgwdrv_store_clp_pdn_from_egtpc()

Last Modified

Oct 02, 2020

Products (2)

  • Cisco ASR 5000 Series
  • Cisco ASR 5500

Known Affected Releases

21.15.16 21.16.1 21.16.1.73508 21.16.2 21.16.3 21.16.c2 21.16.c3 21.16.d0 21.17.0

Description (partial)

Symptom:
CRASH was observed when SGW Relocation is in progress(ST Pending) and we perform clear sub all local purge.

Conditions:
This issue can be reproduced with below steps:

1. Create a multipdn pure s or collapsed call.
2. Perform sgw relocation.
3. Hold the ST response for DSReq(SI = 1)
4. Perform the clear sub all local purge.
5. Due to this DSCfm will be not sent to MME, as a result a hanging session is created at egtpc ingress side.
6. Later if we perform s11 path failure, we can see the reported crash with above stack trace.
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