Cisco Cisco Packet Data Gateway (PDG)
• Secondary IPA flow delete success
• Primary IPA flow delete failed
• Secondary IPA flow delete failed
• Primary IPA flow delete no match
• Secondary IPA flow delete no match
• Primary IPA invalid flowid
• Secondary IPA invalid flowid
• Primary IPA invalid NPU response
• Secondary IPA invalid NPU response
• Max per VLR associations reached
• Invalid NPU response codes
• Primary IPA flow resp code count
• Secondary IPA flow resp code count
Emergency Call Support Irrespective of UE's Advertised Algorithm Support
CSCuz40177 - Task restart due to memory access fault while aborting Attach procedure
Feature Changes
Previous Behavior: The MME rejects emergency calls if the Attach Request is received with:
• no support indicated for any security or confidentiality algorithms, or
• a mismatch in the algorithms announced by the UE and the algorithm preference configured at the MME
(with ue-validation-level command under LTE Emergency Profile configuration mode).
New Behavior:MME code has been modified to avoid rejecting emergency calls in the above scenario.
Now for such a scenario, the MME uses NULL algorithms (EEA0 and EIA0) in response to emergency call
Attach Requests even if the UE does not advertise the support of these algorithms.
Attach Requests even if the UE does not advertise the support of these algorithms.
Customer Impact:
VoLTE emergency calls are successful for all UEs, no matter the UE's validation level.
Enhanced IMEI-TAC-based Operator Policy Selection
CSCuz53891 - More granular IMEI-TAC based operator policy selection
Feature Changes
Previous Behavior:
Release Change Reference, StarOS Release 19
167
MME Changes in Release 19
Emergency Call Support Irrespective of UE's Advertised Algorithm Support