Enter Rom Monitor Mode By Using The Reload Command; Enter Rom Monitor Mode By Resetting The Configuration Register; Rom Monitor Commands - Cisco 3700 Series Hardware Installation Manual

ROM Monitor Commands

The two methods of entering the ROM monitor mode are as follows.

Enter ROM Monitor Mode by Using the reload Command

Connect to the router from a console, and follow these steps:
Step 1 Restart the router with the reload command.
Router# reload
Press the Break key during the first 60 seconds of the system booting.
Step 2
This forces the router into ROM monitor mode, and the ROM monitor prompt appears:
rommon 1>

Enter ROM Monitor Mode by Resetting the Configuration Register

Connect to the router from a console, and follow these steps:
Step 1 Set the bits 3, 2, 1, and 0 of the configuration register to zero.
Router# configuration-register 0x0
Restart the router with the reload command.
Step 2
Router# reload
The router boots into ROM monitor mode, and the ROM monitor prompt is displayed:
rommon 1>
Note The number that appears in the ROM monitor prompt (1>, 2>, and so forth) is the line number. It
increments each time you enter a ROM monitor command.

ROM Monitor Commands

Enter ? or help at the ROM monitor prompt to see a list of available commands. For example:
rommon 1>
alias
boot
break
confreg
cont
context
cookie
dev
dir
dis
dnld
frame
Cisco 3700 Series Routers Hardware Installation Guide
B-2
?
set and display aliases command
boot up an external process
set/show/clear the breakpoint
configuration register utility
continue executing a downloaded image
display the context of a loaded image
display contents of cookie PROM in hex
list the device table
list files in the file system
display instruction stream
serial download a program module
print out a selected stack frame
Appendix B Using the ROM Monitor
OL-2180-08