Cisco Cisco Packet Data Interworking Function (PDIF)
System Changes in Release 16
System and Platform Enhancements for 16.0 ▀
Release Change Reference, StarOS Release 16 ▄
619
System and Platform Enhancements for 16.0
This section identifies all of the system and platform enhancements included in this release:
Feature Changes – new or modified features or behavior changes. For details, refer to the System Administration Guide
for this release.
for this release.
Command Changes – changes to any of the CLI command syntax. For details, refer to the Command Line Interface
Reference for this release.
Reference for this release.
Performance Indicator Changes – new, modified, and deprecated bulk statistics, disconnect reasons, counters and/or
fields in new or modified schema and/or show command output. For details, refer to the Statistics and Counters
Reference for this release.
fields in new or modified schema and/or show command output. For details, refer to the Statistics and Counters
Reference for this release.
CSCtr55441 - VoLTE related ICSR optimization
Applicable Products: P-GW, S-GW, SAEGW
Feature Changes
ICSR Framework Changes to Support VoLTE
A significant number of internal enhancements have been made in support of voice-grade redundancy for Voice over
LTE (VoLTE) deployments. ICSR components have been optimized to ensure that failure recovery is accomplished
within acceptable limits for VoLTE. The impact on the data path is high priority. For data path interruptions, recovery
be limited to no more than 50 milliseconds for intra-chassis failures and l to 2 seconds for inter-chassis failures.
LTE (VoLTE) deployments. ICSR components have been optimized to ensure that failure recovery is accomplished
within acceptable limits for VoLTE. The impact on the data path is high priority. For data path interruptions, recovery
be limited to no more than 50 milliseconds for intra-chassis failures and l to 2 seconds for inter-chassis failures.
The table below cross-references the various CDETS IDs that have been addressed as part of this ICSR-VoLTE
performance optimization.
performance optimization.
Table 3. ICSR-VoLTE Enhancements
CDETS ID
Description
Impact
ICSR Framework Changes
CSCtz64076
GR Write List enhancement
Use a single buffer capable of containing multiple encoded
checkpoints for the GR write list. Process multiple checkpoints
simultaneously.
checkpoints for the GR write list. Process multiple checkpoints
simultaneously.
CSCud76965
Better statistics for ICSR sessmgr
framework
framework
Improve handling of micro-checkpoint counters.
CSCue52826
[ICSR-VoLTE] Reduce the flushing
time during ICSR switchover.
time during ICSR switchover.
See CSCtz64076 and CSCug86838.
CSCue52853
[ICSR-VoLTE] - Changes to allow
data traffic in pending_standby
data traffic in pending_standby
Allow data traffic (no control traffic) during the ICSR Pending-
Standby(PS) state.
Standby(PS) state.
CSCue54471
ICSR-Volte] Changes to process pkts
during sessmgr ICSR audit recovery
during sessmgr ICSR audit recovery
Allow packet processing while accepting new calls during audit
procedure.
procedure.