Cisco Systems 78-16019-02 manual Configuring Autoboot, Displaying the Autoboot Configuration

Chapter 3 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:

	Command	Purpose
Step 1	Switch(config)# config-register 0x2102	Sets the configuration register for autoboot.1
Step 2	Switch(config)# boot system	Sets the BOOT environment variable. This variable
	bootflash:filename	specifies the location and name of the system image
		file to use when automatically booting the system.
Step 3
	Switch(config)# end	Returns to privileged EXEC mode.
	Switch#
Step 4
	Switch# copy system:running-config	Saves the configuration to NVRAM. The new
	nvram:startup-config	configuration register 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.

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 Cisco ONS 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
show version	Displays the configuration register value.
show bootvar	Displays the configuration register value.

	Cisco ONS 15530 Configuration Guide and Command Reference
78-16019-02, Cisco IOS Release 12.2(18)SV2		3-17