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Route Switch Processor (RSP8) Installation and Configuration Guide
OL-4920-02
Configuring High System Availability
Specifying the Default Standby RSP
Yourview of the environment is always from the activeRSP8 perspective, and you must define a default
standby RSP8. The router uses the default standby information when booting.
•If a system boot is due to powering up the router or using thereload command, then the specified
default standby is the standby RSP8.
•If a system boot is due to a system crash or hardware failure, then the system ignores the default
standby designation and makes the crashed or faulty RSP8 the standby RSP8.
To define the default standby RSP8, use the following commands beginning in privileged EXEC
configuration mode:
Upon the nextsystem reboot, the above changes take effect (if both RSP8 cards are operational). Thus,
the specified default standby becomes the standby RSP8 card. The other RSP8 card takes over control
of the system and controls all functions of the router.
If you do not specificallydefine the default standby RSP8, the RSP8 card located in the higher number
processor slot is the default standby.On the Cisco 7507 and Cisco 7507-MX, processor slot 3 contains
the default standby RSP. On the Cisco 7513 and Cisco 7513-MX, processor slot 7 contains the default
standby RSP.
The following example sets the default standby RSP8 to processor slot 2 on a Cisco 7507 or
Cisco 7507-MX:
Router# configure terminal
Router(config)# slave default-slot 2
Router(config)# end
Router# copy running-config startup-config
Ensuring that Both RSPs Contain the Same Configuration Files
With the simple hardware backup and software error protection implementation methods, you always
wantyour active and standby configuration files to match. To ensure that theymatch, turn on automatic
synchronization. In automatic synchronization mode, the active copies its startup configuration to the
standby’s startup configuration when you issue acopy command that specifies the active’s startup
configuration (nvram:startup-config) as the target.
Command Purpose
Step1 Router# configure terminal Enters global configuration mode.
Step2 Router(config)# slave default-slotprocessor-slot-number Defines the default standby RSP8 (or RSP16).
Step3 Router(config)#end Exits global configuration mode and returns you
to privileged EXEC configuration mode.
Step4 Router# copy system: running-config nvram:startup-config Saves this information to your startup
configuration.