Cisco Systems CISCO7201 manual Setting the Configuration Register While Running Cisco IOS, Confreg

Appendix C Configuration Register Information

Setting the Configuration Register While Running Cisco IOS

09Do not use secondary bootstrap

08Break disabled

07OEM disabled

06Ignore configuration disabled

05Fast boot disabled

04Fan boot disabled

03-00 Boot to ROM monitor

If the prompt is “rommon1”, the confreg command displays the virtual configuration register currently in effect. It includes a description of the bits. See the following sample output:

rommon 1 > confreg

Configuration Summary enabled are:

load rom after netboot fails console baud: 9600

boot: the ROM Monitor

Do you wish to change the configuration? y/n [n]

Setting the Configuration Register While Running Cisco IOS

The configuration register can be set in the configuration mode with the config-register 0x value command. See the following sample output:

Router# configure terminal

Enter configuration commands, one per line. End with CNTRL/Z. Router(config)#config-register 0x2142

Router(config)#end

Router#

%SYS-5-CONFIG_I: Configured from console by console

Setting the Configuration Register While Running ROM Monitor

If the prompt is “>”, the o/r0x value command sets the configuration register. See the following sample output:

>o/r 0x2102

>

If the prompt is “rommon1”, the confreg command sets the configuration register. It prompts the user about each bit. See the following sample output:

	rommon	1 > confreg
	Confiuration Summary
	enabled are:
	load rom after netboot fails
	console baud: 9600
	boot: the ROM Monitor
	do you	wish to change the configuration		y/n	[n]:	y
	enable	“diagnostic mode”? y/n	[n]:	n
	enable	“use net in IP bcast address”? y/n			[n]:	n
	disable	“use rom after netboot fails”? y/n			[n]:	n
	enable	“use all zero broadcast”? y/n		[n]:	n
	enable	“break/abort has effect”? y/n		[n]:	n
	Cisco 7201 Installation and Configuration Guide
C-6						OL-11364-04