Appendix B ROM Monitor

Configuration Register

This will change the virtual configuration register to the value specified. The value is always interpreted as hexadecimal. Entering confreg without an argument displays the contents of the virtual configuration register and a prompt to alter the contents by describing the meaning of each bit.

Whether or not an argument is provided, the new virtual configuration register value is written into NVRAM, but it does not take effect until you reset or power-cycle the router.

The following display shows an example of menu mode:

rommon 7> confreg

Configuration Summary

 

 

enabled

are:

 

 

console

baud: 9600

 

 

boot: the ROM Monitor

 

 

do you wish to change the configuration? y/n

[n]: y

enable

“diagnostic mode”? y/n [n]:

y

 

enable

“use net in IP bcast address”? y/n

[n]:

enable

“load rom after netboot fails”? y/n

[n]:

enable

“use all zero broadcast”? y/n

[n]:

 

enable

“break/abort has effect”? y/n

[n]:

 

enable

“ignore system config info”? y/n [n]:

change console baud rate? y/n [n]:

y

 

enter rate: 0

= 9600, 1 = 4800, 2 = 1200, 3 = 2400

4 = 19200, 5

= 38400, 6 = 57600, 7 = 115200

[0]: 0

change the boot characteristics? y/n

[n]:

y

enter to boot:

 

 

 

0 = ROM Monitor

 

 

1 = the boot

helper image

 

 

2-15 = boot system

 

 

[0]:

0

 

 

 

Configuration

Summary

 

 

enabled are:

 

 

 

diagnostic mode

 

 

console baud:

9600

 

 

boot: the ROM

Monitor

 

 

do you wish to change the configuration? y/n

[n]:

You must reset or power cycle for new config to take effect

 

 

Cisco 1700 Series Router Software Configuration Guide

 

 

 

 

 

 

78-5407-03

 

 

B-9

 

 

 

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Cisco Systems 1700 appendix Enable Diagnostic mode? y/n n