Cisco Systems 7401ASR manual Setting the Configuration Register While Running Cisco IOS

Appendix D Configuration Register Information

Setting the Configuration Register While Running Cisco IOS

14 IP broadcasts do not have network numbers

13Boot default ROM software if network boot fails

12-11 Console speed is 9600 baud

10IP broadcasts with ones

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# config t

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 or0x<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
	Cisco 7401ASR Installation and Configuration Guide
D-6				OL-5419-01 B0