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Cisco ONS 15530 Configuration Guide and Command Reference
78-16019-02, Cisco IOS Release 12.2(18)SV2
Chapter3 Initial Configuration Configuring CPU Switch Module Redundancy
Configuring Autoboot
If you have changed the default configuration register value from autoboot, you can change it back by
performing the following steps, beginning in global configuration mode:
Note If the standby CPU switch module remains in ROM monitor mode, you can manually boot the CPU
switch module using a system image either on the bootflash or on a Flash PC Card.
Example
The following example shows how to configure the CiscoONS 15530 to autoboot using the first valid
file on the Flash PC Card in slot 0:
Switch(config)# config-register 0x2102
Switch(config)# boot system flash slot0:
Switch(config)# end
Switch# copy system:running-config nvram:startup-config

Displaying the Autoboot Configuration

To display the configuration register value, use the following EXEC command:
Command Purpose
Step1 Switch(config)# config-register 0x2102 Sets the configuration register for autoboot.1
Step2 Switch(config)# boot system
bootflash:filename Sets the BOOT environment variable. This variable
specifies the location and name of the system image
file to use when automatically booting the system.
Step3 Switch(config)# end
Switch#
Returns to privileged EXEC mode.
Step4 Switch# copy system:running-config
nvram:startup-config Saves the configuration to NVRAM. The new
configurationregister value takes effect after the next
system reload.
1. This is the default configuration register setting. For details on using the configuration register to set boot parameters, refer
to the Cisco IOS Configuration Fundamentals Configuration Guide.
Command Purpose
show version Displays the configuration register value.
show bootvar Displays the configuration register value.