Cisco Systems OL-6426-02 manual ROM Monitor Commands, Exits global configuration mode, Reload

Appendix C ROM Monitor

ROM Monitor Commands

Step 4

Step 5

Timesaver

Command	Purpose
exit	Exits global configuration mode.
reload	Reboots the router with the new configuration register value. The router
	remains in ROM monitor and does not boot the Cisco IOS software.
	As long as the configuration value is 0x0, you must manually boot the
	operating system from the console. See the boot command in the “Command
	Descriptions” section in this appendix.
	After the router reboots, it is in ROM monitor mode. The number in the
	prompt increments with each new line.

Break (system interrupt) is always enabled for 60 seconds after the router reboots, regardless of whether it is set to on or off in the configuration register. During this 60-second window, you can break to the ROM monitor prompt by pressing the Break key.

ROM Monitor Commands

Enter ? or help at the ROM monitor prompt to display a list of available commands and options, as follows:

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
dir	List files in directories-dir <directory>
dis	display	instruction stream
format	Format a filesystem-format <filessystem>
frame	print out a selected stack frame
fsck	Check filesystem consistency-fsck <filesystem>
help	monitor	builtin command help
history	monitor	command history
meminfo	main memory information
more	Concatenate (type) file(s)-cat <filenames ...>
repeat	repeat a monitor command
reset	system reset
set	display	the monitor variables
stack	produce	a stack trace
sync	write monitor environment to NVRAM
sysret	print out info from last system return
tftpdnld	tftp image download
unalias	unset an alias
unset	unset a	monitor variable
xmodem	x/ymodem image download

Commands are case sensitive. You can halt any command by pressing the Break key on a terminal. If you are using a PC, most terminal emulation programs halt a command when you press the Ctrl and the Break keys at the same time. If you are using another type of terminal emulator or terminal emulation software, see the documentation for that product for information on how to send a Break command.

Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide

C-2 OL-6426-02