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Cisco Bug: CSCuj43304 - MME sends UE unreachable to VLR in case UE not respond to paging

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.0(38)

Description (partial)

Symptom:
MME not allowing VLR for paging re-attempt

Conditions:
MME sends UE unreachable to VLR in the following scenario:
1.	UE is combined attached to MME
2.	UE goes out of coverage (pull out battery)
3.	Call to UE ? paging is send from VLR to MME. MME sends Paging to UE.
4.	After 7 seconds MME sends UE UNREACHABLE to VLR.

What happens in case UE does not respond to paging is that after 7 seconds ( this is the value of T3413) MME sends UE_UNREACHABLE. This message stops the paging procedure at VLR and forwards the call to the voicemail.
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