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Cisco Bug: CSCvh67114 - sessmgr restarts at function egtpc_validate_context_ack_rsp_evt

Last Modified

Mar 07, 2018

Products (2)

  • Cisco ASR 5000 Series
  • Cisco ASR 5500

Known Affected Releases

21.6.0 21.6.0.68679 21.7.0

Description (partial)

Symptom:
Sessmgr task restart during TAU attach procedure

Conditions:
1. Decor feature config  is enabled on MME 
2. During TAU attach DCN MME node receives a context response with negative cause:   EGTP_CAUSE_USER_AUTHENTICATION_FAILED from old MME, 
3. DCN MME triggers a NAS Identity procedure towards UE and it's successful 
4. DCN MME triggers a AIR/AIA towards HSS, receives AIR from HSS with UE usage type. 

Based on UE usage type MME  decides to re-route a message leading to sessmgr task  restart.
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