Srp Redundancy, Aaa And Diameter Guard Timers - Cisco ASR 5500 System Administration Manual

Configuring the Service Redundancy Protocol (SRP) Context
• 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.

SRP Redundancy, AAA and Diameter Guard Timers

Guard timers ensure that local failures, such as reboots and task restarts, do not result in ICSR events which
can be disruptive.
The guard timer command configures the redundancy-guard-period and monitor-damping-period for SRP
service monitoring.
configure
context context_name
service-redundancy-protocol variable
guard-timer { aaa-switchover-timers { damping-period seconds | guard-period seconds } |
diameter-switchover-timers { damping-period seconds | guard-period seconds } | srp-redundancy-timers
{ aaa { damping-period seconds | guard-period seconds } | bgp { damping-period seconds |
guard-period seconds } | diam { damping-period seconds | guard-period seconds } }
end
Notes:
• aaa-switchover-timers – sets timers that prevent back-to-back ICSR switchovers due to an AAA failure
(post ICSR switchover) while the network is still converging.
• diameter-switchover-timers – sets timers that prevent a back-to-back ICSR switchover due to a Diameter
failure (post ICSR switchover) while the network is still converging.
• srp-redundancy-timers – sets timers that prevent an ICSR switchover while the system is recovering
from a local card-reboot/critical-task-restart failure.
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◦damping-period – configures a delay time to trigger an ICSR switchover due to a monitoring
failure within the guard-period.
◦guard-period – configures the local-failure-recovery network-convergence timer.
◦damping-period – configures a delay time to trigger an ICSR switchover due to a monitoring
failure within the guard-period.
◦guard-period – configures the local-failure-recovery network-convergence timer.
◦aaa – local failure followed by AAA monitoring failure
◦bgp – local failure followed by BGP monitoring failure
◦diam – local failure followed by Diameter monitoring failure
Interchassis Session Recovery