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ROM Monitor Commands
Command
Step 4
exit
Step 5
reload
Break (system interrupt) is always enabled for 60 seconds after the router reboots, regardless of whether
Timesaver
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
boot
break
confreg
cont
context
cookie
copy
delete
dir
dis
dnld
format
frame
fsck
help
history
meminfo
mkdir
more
rename
repeat
reset
rmdir
set
stack
sync
sysret
tftpdnld
unalias
unset
xmodem
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
C-2
Purpose
Exits global configuration mode.
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
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.
?
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
Copy a file-copy [-b <buffer_size>] <src_file> <dst_file>
Delete file(s)-delete <filenames ...>
List files in directories-dir <directory>
display instruction stream
serial download a program module
Format a filesystem-format <filessystem>
print out a selected stack frame
Check filesystem consistency-fsck <filesystem>
monitor builtin command help
monitor command history
main memory information
Create dir(s)-mkdir <dirnames ...>
Concatenate (type) file(s)-cat <filenames ...>
Rename a file-rename <old_name> <new_name>
repeat a monitor command
system reset
Remove a directory
display the monitor variables
produce a stack trace
write monitor environment to NVRAM
print out info from last system return
tftp image download
unset an alias
unset a monitor variable
x/ymodem image download
Appendix C
ROM Monitor
"Command
OL-5332-01
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