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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)

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).

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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