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Route Switch Processor (RSP8) Installation and Configuration Guide
OL-4920-02
Configuring High System Availability
You do not need to use theslave sync config command when automatic synchronization is enabled,
unless this is the first time you are installing a second RSP. For more information about this use of the
slavesync config command, see the “Monitoring and Maintaining HSA Operation” section on page 40.
Note Automatic synchronization mode is on by default. Therefore, unless you have disabled automatic
synchronizationa manual update is not required. For more information about automatic synchronization,
see the “Ensuring that Both RSPs Contain the Same Configuration Files” section on page28.
To set environment variables on the standby RSP when automatic synchronization is on, use the
following commands on the active RSP beginning in global configuration mode:
Monitoring and Maintaining HSA Operation
To monitor and maintain HSA operation, you can override the standby image that is bundled with the
active image by using the following command in global configuration mode:
Note The slave imagesystem command, previously used to determine which image the standby runs, is not
valid with newer images containing HA features.
Command Purpose
Step1 Router(config)#boot system (Optional) Specifies the system image that the router loads at
startup and stores it in the BOOT variable in the current running
configuration.
Note For a complete syntax description and usage guidelines,
refer to the Cisco IOS Configuration Fundamentals
Command Reference publication.
Step2 Router(config)#boot bootldr file-url (Optional) Specifies the Flash file system and filename that ROM
uses at startup and stores it in the BOOTLDR variable in the
current running configuration
Step3 Router(config)#boot config file-url (Optional) Specifiesthe location of the configuration file that the
router uses at startup and stores it in the CONFIG_FILE
environment variable in the current running configuration.
Step4 Router(config)#end Exits global configuration mode and returns you to privileged
EXEC configuration mode.
Step5 Router#copy running-config startup-config Saves the settings to the startup configuration. This also puts the
information under that RSP’s ROM monitor control.
Step6 Router#show bootvar Verifies the environment variable settings.
Command Purpose
Router(config)#hw-module slot image Specifies which image the standby runs.