How to load an IOS onto a Cisco router using ROMmon mode via console cable?

1. Connect to the router using the light blue Cisco console cable (make sure the RJ-45 connector is plugged into the console port on the router) using the 9600-8-N-1 settings. The next two steps (changing the console baud rate) are optional.
2. In ROMmon mode, change the baud rate to 15200 using the confreg command.

rommon 1>confreg
Configuration Summary
enabled are:
break/abort has effect
console baud: 9600
boot: the ROM monitor

¨ The router will guide you through changing the registry. You want to press y to chang the configuration. The only other change you need to make is the change to the console baud rate, set that to 7 (115200).

do you wish to change the configuration? y/n [n]: y
enable “diagnostic mode”? y/n [n]:
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]: 7
change the boot characteristics? y/n [n]:

Configuration Summary
enabled are:
break/abort has effect
console baud: 115200
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.

rommon 2>

 

1. When you reset the router in your console window you will see characters that you cannot read. You have to stop the session and set your baud rate to 115200. This will let you increase the speed that you use to transfer the file.
2. At the rommon prompt enter xmodem -c {filename}
3. When prompted, enter y to continue
4. From your hyperterminal prompt, click on transfter then send file
5. Select the IOS image then change the protocol to xmodem via the dropdown box then click send.
6. After the IOS has been downloaded, change the boot order by using the confreg 0x2102 command.