Cisco Systems PRP-2=, PRP-1= Configuring the Software Configuration Register, Command Purpose

Additional Configuration and Maintenance Tasks

Note Cisco 12000 Series Internet Routers are typically delivered from the factory with a mini-Cisco IOS software boot image in the boot flash and a flash card containing a suitable working Cisco IOS image. If you need a Cisco IOS upgrade, download the appropriate Cisco IOS image from Cisco.com.

Configuring the Software Configuration Register

To configure the software configuration register, follow these steps:

	Command	Purpose
Step 1
	Router> enable	Enters privileged EXEC mode.
	Password: <password>
Step 2
	Router# configure terminal	Enters global configuration mode.
Step 3
	Router(config)#	Sets the contents of the software configuration register,
	config-register 0xvalue	where value is a 4-bit hexadecimal number as described
		in Table 8.
Step 4
	Router(config)# ctrl-Z	Exits global configuration mode.
Step 5
	Router# show version	Displays the software configuration register value
		currently in effect. This is the value that will be used
		the next time the router reloads. The value is displayed
		on the last line of the display, as in the following
		example:
		Configuration register is 0x141 (will be 0x102 at
		next reload)
Step 6
	Router# copy running-config	Saves the software configuration register settings to
	startup-config	NVRAM.
	or
	Router# write memory
Step 7
	Router# reload	Reboots the router. Configuration register changes take
		effect only after the system reloads.

	Performance Route Processor Installation and Configuration Guide
58	OL-11656-01