Cisco Cisco Packet Data Interworking Function (PDIF)
Interchassis Session Recovery
ICSR Configuration ▀
VPC-VSM System Administration Guide, StarOS Release 19 ▄
257
Basic Parameters
This configuration assigns a chassis mode and priority, and also configures the redundancy link between the primary
and backup chassis:
and backup chassis:
configure
context srp_ctxt_name
service-redundancy-protocol
chassis-mode { primary | backup }
priority priority
peer-ip-address ip_address
hello-interval dur_sec
dead-interval dead_dur_sec
end
Notes:
ICSR should be configured and maintained in a separate context.
When assigning the chassis mode on the backup chassis be sure to enter the backup keyword.
The checkpoint command sets the amount of time the chassis waits before check pointing an existing call
session. Checkpoints can be set for IMS (VoLTE) and/or non-IMS sessions. The checkpoint is a snapshot of
the current application state that can be used to restart its execution in case of failure. The default setting is 60
seconds.
the current application state that can be used to restart its execution in case of failure. The default setting is 60
seconds.
The priority determines which chassis becomes active in the event that both chassis are misconfigured with the
same chassis mode; see
Chassis Initialization.
The higher priority chassis has the lower number. Be sure to
assign different priorities to each chassis.
Enter the IP chassis of the backup chassis as the peer-ip-address to the primary chassis. Assign the IP address of
the primary chassis as the peer-ip-address to the backup chassis.
The dead-interval must be at least three times greater than the hello-interval. For example, if the hello interval
is 10, the dead interval should be at least 30. System performance is severely impacted if the hello interval and
dead interval are not set properly. An optional delay-interval command allows you to delay the start dead-
interval for an interval following the loading of configuration files.
dead interval are not set properly. An optional delay-interval command allows you to delay the start dead-
interval for an interval following the loading of configuration files.
SRP Redundancy, AAA and Diameter Guard Timers
Guard timers ensure that local failures, such as VM reboots and task restarts, do not result in ICSR events which can be
disruptive.
disruptive.
The guard timer command configures the redundancy-guard-period and monitor-damping-period for SRP service
monitoring.
monitoring.
configure
context context_name
service-redundancy-protocol variable