Performance Improvement Commands; Turning Off Ipc Message Aggregation To Reduce Latency Towards Core Network - Cisco ASR 5000 Series 3G Home NodeB Administration Manual

▀ Performance Improvement Commands

Performance Improvement Commands
In the event that an issue of IPC message latency towards core network was discovered with HNB-GW service, it may
be necessary to take corrective/preventive action.
The system provides a latency reduction mechanisms in SGSN Global Service Configuration Mode to address latency
issues in order to minimize the latency towards core network. These mechanism is described in the section that follow.
Turning off IPC Message Aggregation To Reduce Latency Towards Core
Network
This command enables/disables aggregation of IPC messages in the link manager (linkmgr) and session manager
(sessmgr).
This command includes options to configure the frequency of aggregated message flushing and the number of packets to
be buffered before the flush.
At the HNB-GW node, this command provides a solution to reduce latency while sending the IPC messages toward CN.
Important:
the context in which the HNB-GW service is configured. Refer Command Line Interface Reference for more
information on this command.
The command has the following syntax:
aggregate-ipc-msg {linkmgr | sessmgr } {flush-frequency frequency | num-msgs
number_msgs }
default aggregate-ipc-msg {linkmgr | sessmgr }
Keyword/Variable
default
linkmgr
sessmgr
flush-frequency
frequency
num-msgs number_msgs
▄ Cisco ASR 5000 Series 3G Home NodeB Gateway Administration Guide
108
This command must be executed from SGSN Global Service Configuration Mode within
Description
Resets the managers to default values for flushing; i.e. 1.
Selects the linkmgr to configure the number of IPC messages to be aggregated and frequency of
flushing.
Selects the sessmgr to configure the number of IPC messages to be aggregated and frequency of
flushing.
Configure the frequency, in 100-millisecond intervals, that the aggregated IPC messages will be
flushed.
: Enter an integer from 1 to 3. Default is 1.
frequency
Configure the number of IPC messages to aggregate before flushing.
: Enter the integer 1 (to disable aggregation) or an integer from 2 to 164 to define
number_msgs
the number of messages. Default is 10.
Troubleshooting the Service
OL-25069-03