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Cisco Bug: CSCun54447 - Stuck S1AP-MME-IDs

Last Modified

Feb 05, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(16) 16.0(1)

Description (partial)

MME immediately releases the service request or TAU Request in some instances. S1AP-MME-ID seems to be stuck in a loop sending Service Requests which the MME immediately releases.

This condition is triggered by MME UE S1AP id leak at the MME. The following scenario was identified:
1. ENB sends NAS service request to MME
2. MME sends NAS detach request to UE/ENB
3. ENB sends S1AP error indication to MME
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