Cisco ASR 5500 User Manual

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The priority determines which chassis becomes active in the event that both chassis are misconfigured
with the same chassis mode; see Chassis Initialization, on page 342. The higher priority chassis has the
lower number. Be sure to assign different priorities to each chassis.
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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.
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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.
◦ 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.
• 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.
◦ 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.
• srp-redundancy-timers – sets timers that prevent an ICSR switchover while the system is recovering
from a local card-reboot/critical-task-restart failure.
◦ aaa – local failure followed by AAA monitoring failure
◦ bgp – local failure followed by BGP monitoring failure
◦ diam – local failure followed by Diameter monitoring failure
ASR 5500 System Administration Guide, StarOS Release 21.4
346
Interchassis Session Recovery
Configuring the Service Redundancy Protocol (SRP) Context

Cisco ASR 5500 Specifications

General

Brand	Cisco
Model	ASR 5500
Category	Network Router
Language	English