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Cisco Bug: CSCut37468 - SPGW does not send DDN toward idle UE resulting in SIP messages failures

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

16.4.3

Description (partial)

Symptom:
SPGW is not sending DDN messages due to SIP messages towards UE on downlink side when UE is in IDLE state ; as results IMS will fail the call with cause code 408. SPGW should be sending DDN toward MME/RAN in order to reestablishing radio bearer when UE in in IDLE state.

Conditions:
In case of Multi Pdn Call,
if DDN is initiated in between the 2 MBRs of these two PDN,
ex.
UE has 2 PDN connections
UE moves to IDLE State,
MBR for PDN 1 received,
DL date received on bearer for PDN 2. so DDN is initiated
MBR for PDN 2 is received.
UE Moves to IDLE again,
Now if DL data comes on PDN1,
then DDN was not generated.
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