B-10
Cisco 7204 Installation and Configuration Guide
OL-5101-02
Appendix B Configuration Register Information
Setting the Configuration Register While Running Cisco IOS
09
Do not use secondary bootstrap
08
Break disabled
07
OEM disabled
06
Ignore configuration disabled
05
Fast boot disabled
04
Fan 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
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
