Cisco Cisco Packet Data Interworking Function (PDIF)
MME Changes in Release 17
MME Enhancements for 17.2 ▀
Release Change Reference, StarOS Release 17 ▄
271
Previous Behavior: The “EPS QoS Not Accepted” reject cause was not available for use in Bearer Alloc Reject ESM
control messages.
control messages.
New Behavior: The “EPS QoS Not Accepted” reject cause code is now supported for use in the Bearer Alloc Reject
ESM control message. This cause code is received when UE-initiated dedicated bearer request is rejected by the MME
as a result of the MME’s configuration settings in the APN Profile - ‘reject’ option set with the
ESM control message. This cause code is received when UE-initiated dedicated bearer request is rejected by the MME
as a result of the MME’s configuration settings in the APN Profile - ‘reject’ option set with the
dedicated-bearers
{ gbr | non-gbr }
command.
Corresponding counter and bulk statistic variable have been added to track the use of this cause code.
Customer Impact: Support for this cause code will assist customers to debug the reject cause for bearer allocation
failures.
failures.
Performance Indicator Changes
MME Schema
Use of the “EPS QoS Not Accepted” reject cause code for bearer allocation failures, is tracked as a bulk statistic in the
MME schema:
MME schema:
esm-msgtx-brralloc-rej-eps-qos-not-accepted
show mme-service statistics
Use of the “EPS QoS Not Accepted” reject cause code for bearer allocation failures, is tracked with the following new
output counter generated by the
output counter generated by the
show mme-service statistics
command:
EPS QoS Not Accepted
CSCuq98725 - MME sesstrc task goes to over state when cell trace traffic is ON
Feature Changes
Increase in Memory Allocation for Sesstrc at the SMC Card
Previous Behavior: Consider a scenario where cell traffic trace is enabled for multiple subscribers . The sesstrc task
enters an over state when cell trace traffic is sent continuously for subscribers. The local storage for C type XML files is
only 40 MB and this limit is crossed leading to file deletions. These file deletions consume extra CPU time. The Sesstrc
CPU usage and memory are at 15% and 28 MB respectively.
enters an over state when cell trace traffic is sent continuously for subscribers. The local storage for C type XML files is
only 40 MB and this limit is crossed leading to file deletions. These file deletions consume extra CPU time. The Sesstrc
CPU usage and memory are at 15% and 28 MB respectively.
New Behavior: The issue is resolved by increasing the local storage for C type XML files to 100 MB. The Sesstrc CPU
usage and memory updated to 90% and 100 MB respectively to accommodate the incoming rate of Cell Trace files.
usage and memory updated to 90% and 100 MB respectively to accommodate the incoming rate of Cell Trace files.
Customer Impact: The sesstrc resides at the SMC card, more memory has been allocated to sesstrc.
CSCur19886 - Sessmgr crash sess/mme/mme-app/app/mme_egtp_fw.c:1014
Feature Changes
Idle-mode Entry Allowed During Outbound Handover