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C-6
Cisco VG224 Voice Gateway Software Configuration Guide
OL-5005-01
Appendix C Using the ROM Monitor
Entering the ROM Monitor Mode
To change the virtual configuration register from the ROM monitor, enter confreg by itself for menu
mode, or enter the new value of the register in hexadecimal.
• confreg [hexnum]—Change the virtual configuration register to the value specified. The value is
always interpreted as hexadecimal.
Note Entering confreg without an argument displays the contents of the virtual configuration register and
prompts you to alter the contents by describing the meaning of each bit. In either case, the new virtual
configuration register value is written into NVRAM, but is not effective until you reset or power-cycle
the router.
The following display shows an example of the confreg command:
rommon 7 > confreg
Configuration Summary
enabled are:
break/abort has effect
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]:
disable “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
break/abort has effect
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
Using the show rom-monitor command
The show rom-monitor command displays the current version of the read-only ROM monitor and, if
present displays the upgrade version of the ROM monitor. The upgrade version is selected when the
system is rebooted. This command runs in the Cisco IOS EXEC mode.
You get the following output when the read only ROM monitor is present: