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Cisco Bug: CSCup68259 - Issue with processing of RECOVERY IE in across s11

Last Modified

Dec 24, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(21)

Description (partial)

Symptom:
1. Attach a subscriber .. When mme contacts sgw for the first time .. it sends Recovery IE value of 50 in create session response message . 
2. After a few secs , attach another subscriber .. Sgw sends recovery IE value of 49 in the message . 
MME clears the previous subscriber ( assuming path failure ).

If the value of a Restart counter previously stored for a peer is larger than the Restart counter value received in the Echo Response message or the GTP-C message, taking the integer roll-over into account, this indicates a possible race condition (newer message arriving before the older one). The received new Restart counter value shall be discarded and an error may be logged.

Conditions:
Lesser Recovery value being received by MME for a peer whose previously stored Recovery value is more ..
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