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Cisco Bug: CSCun94236 - MME uses wrong sec keys during 3g to 4g IRAT leading to SOS

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.0(102) 15.0(16)

Description (partial)

Symptom:
Devices that experience this issue go into SOS mode and lose all voice and data services until the UE is reloaded (toggling radio does not help).

Conditions:
During a 3G->4G IRAT where the device reports both a 3G identity (Mapped GUTI) and a 4G identity (Additional GUTI),
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