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Cisco Bug: CSCuo65567 - Assertion failure at sess/sgsn/sgsn-app/gtp_c/gtapp_mm_fsm.c

Last Modified

Feb 09, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(17) 15.0(19)

Description (partial)

Symptom:
1.	2g old inter sgsn rau procedure for subscriber-1 till sgsn context response to peer and waiting from sgsn-context-ack.
2.	Subscriber-1 got freed for some reason and gtp-mm-node was not cleaned up. (could be clear subs issued on him or ms init detach or cancel loc)
3.	The same smid got allocated to subscriber-2 when he entered into sgsn with new inter sgsn rau in 2g.
4.	Authentication is in progress for subscriber-2 and during that time the sgsn-context-ack for subscriber-1 was received on the dangling tunnel which zeroed the teid in the smid. (but to the gmm-app this is an invalid event and does nothing)
5.	After check imei procedure of subscriber-2 gmm found that the teid is zeroed and sessmgr crashed.

Conditions:
Same app structures should be re-allocated to a different subscriber coming via inter sgsn rau procedure after the partial clean up of the old israu subscriber.
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