Cisco Cisco ASR 5000
Global Configuration Mode Commands (L-S)
require graceful-cleanup-during-audit-failure ▀
Command Line Interface Reference, StarOS Release 18 ▄
5523
Usage
Use this command to enable or disable graceful cleanup of dropped calls during ICSR audit failures.
During an audit on the gateways (P-GW/S-GW/GGSN/SAEGW) after Session Recovery or an ICSR event, if
any critical information, internally or externally related to a subscriber session seems inconsistent, ICSR will
locally purge the associated session information.
Since external gateways (peer nodes) are unaware of the purging of this session, the UE session may be
maintained at other nodes. This leads to unnecessary hogging of resources external to the gateway and an
unreachable UE for VoLTE calls.
When this feature is enabled, graceful cleanup for an ICSR audit of failed calls occurs. External signaling
notifies peers of session termination before purging the session. The gateway will attempt to notify external
peers of the removal of the session. External nodes to the local gateway include: S-GW, P-GW, SGSN,
MME, AAA, PCRF, and IMSA.
Audit failure can occur because of missing or incomplete session information. Therefore, only the peers for
which the information is available will be notified.
During an audit on the gateways (P-GW/S-GW/GGSN/SAEGW) after Session Recovery or an ICSR event, if
any critical information, internally or externally related to a subscriber session seems inconsistent, ICSR will
locally purge the associated session information.
Since external gateways (peer nodes) are unaware of the purging of this session, the UE session may be
maintained at other nodes. This leads to unnecessary hogging of resources external to the gateway and an
unreachable UE for VoLTE calls.
When this feature is enabled, graceful cleanup for an ICSR audit of failed calls occurs. External signaling
notifies peers of session termination before purging the session. The gateway will attempt to notify external
peers of the removal of the session. External nodes to the local gateway include: S-GW, P-GW, SGSN,
MME, AAA, PCRF, and IMSA.
Audit failure can occur because of missing or incomplete session information. Therefore, only the peers for
which the information is available will be notified.
Example
The following command sequence enables graceful cleanup and sends a Cause IE for non-IMS/Custom1
APNs of SYSTEM FAILURE.
APNs of SYSTEM FAILURE.
require graceful-cleanup-during-audit-failure del-caus non-ims-apn
system-failure
system-failure