Cisco Systems 3700 Series manual ROM Monitor Commands

Appendix B Using the ROM Monitor

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

Step 2 Press the Break key during the first 60 seconds of the system booting.

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

Step 2 Restart the router with the reload command.

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	set and display aliases command
	boot	boot up an external process
	break	set/show/clear the breakpoint
	confreg	configuration register utility
	cont	continue executing a downloaded image
	context	display the context of a loaded image
	cookie	display contents of cookie PROM in hex
	dev	list the device table
	dir	list files in the file system
	dis	display instruction stream
	dnld	serial download a program module
	frame	print out a selected stack frame
	Cisco 3700 Series Routers Hardware Installation Guide
B-2		OL-2180-08