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Cisco Bug: CSCuq45440 - Assertion failure at egtpc_interface.c:134, egtpc_handle_user_sap_event

Last Modified

Feb 13, 2018

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(13) 16.1.0.55634 16.3.2.57950 17.1.0

Description (partial)

Symptom:
Session manager crash during the following scenario:

1)Do an EPS attach
2)Initiate a TAU on Initial UE message
3)MME will send Release access Bearer message towards the SGW. Do not send a response message.
4)Send a Service Request on Initial UE message.
5)Now MME will send Initial Context setup req towards the eNB and Modify bearer request towards the SGW. Do not send Modify Bearer response message.
6)Now initiate a X2 HO. MME will retry Modify Bearer Request message
7)Before the MBR max retransmission count expiry, make sure that egtp path failure occurs. 
MME was crashing here. 

Conditions:
1)Do an EPS attach
2)Initiate a TAU on Initial UE message
3)MME will send Release access Bearer message towards the SGW. Do not send a response message.
4)Send a Service Request on Initial UE message.
5)Now MME will send Initial Context setup req towards the eNB and Modify bearer request towards the SGW. Do not send Modify Bearer response message.
6)Now initiate a X2 HO. MME will retry Modify Bearer Request message
7)Before the MBR max retransmission count expiry, make sure that egtp path failure occurs. 
MME was crashing here.
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