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Cisco Bug: CSCuq68312 - MME Multiple Attach Request function does not try all available SGWs

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

16.1.0.55634

Description (partial)

Symptom:
MME does not try all available SGWs when handling multiple attach requests from UE:
UE sends attach request
MME does the authentication and security procedure
MME sends Create Session Request to first SGW, no response from SGW1. MME repeats the request
MME sends Create Session Request to second SGW after 5 seconds, no response from SGW2. MME repeats the request
UE times out and request releasing the context
MME purges the UE
UE sends the second attach request
MME starts over the procedure with SGW1 instead of examining SGW2 and SGW3

Conditions:
MME handling of Multiple same attach requests
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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