Cisco Cisco Packet Data Interworking Function (PDIF)
MME Changes in Release 16
MME Enhancements for 16.0 ▀
Release Change Reference, StarOS Release 16 ▄
275
CSCub06145 - MME:SGS VLR re-selection in case of loss of VLR association
Feature Changes
Automatic VLR Reselection on Failure
This feature requires that a valid MME Resiliency license key be installed. Contact your Cisco Account or Support
representative for information on how to obtain a license.
representative for information on how to obtain a license.
In previous releases, the MME supported the manual ability to offload UEs associated with a specific VLR during an
SGs association failure or for a planned maintenance window where a VLR would be unavailable.
SGs association failure or for a planned maintenance window where a VLR would be unavailable.
In this release, this capability has been enhanced to automatically initiate the VLR offload feature when a SGs
association failure is detected.
association failure is detected.
The configuration of this feature allows a detach rate to be configured. This detach rate (in subscribers per 5 second
interval) determines the rate at which subscribers are detached.
interval) determines the rate at which subscribers are detached.
The existing manual failure handling capability cannot be used simultaneously with this new functionality. The MME
will report a command line error if an attempt is made to configure/enable this function if it is currently active.
will report a command line error if an attempt is made to configure/enable this function if it is currently active.
Customer Impact: This feature provides operators with a more proactive approach to deal with SGs association
failures. This enhancement enables the MME to automatically initiate a change in the configuration based on current
network conditions.
failures. This enhancement enables the MME to automatically initiate a change in the configuration based on current
network conditions.
Command Changes
vlr-failure
This new command configures automatic VLR failure handling for the SGs service.
configure
context context_name
sgs-service name
vlr-failure duration minutes backoff-timer seconds detach-rate number [ -
noconfirm ]
noconfirm ]
[ no ] vlr-failure [ -noconfirm ]
end
Notes:
Refer to the MME SGs Service Configuration Mode Commands chapter in the Command Line Interface Reference for
more information about this command.
more information about this command.
Performance Indicator Changes
show sgs-service vlr-status full
This command shows if the feature is enabled (Yes or No), as well as detach statistics relating to this feature.