5-4
Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
Chapter 5 ROM Monitor Overview and Basic Procedures
Entering ROM Monitor Mode
Commonly Used ROM Monitor Commands
Table 5-1
summarizes the commands commonly used in ROM Monitor. For specific instructions on
using these commands, refer to the relevant procedure in this document.
Displaying the Available ROM Monitor Commands
Table 5-2
describes the available
help
commands for ROM Monitor mode.
Note
Commands are case-sensitive. You can halt any command by pressing
Ctrl-C
.
Examples
The following example shows what appears when you enter the
?
command on a Cisco ISR 4451-X:
rommon 1 > ?
alias set and display aliases command
boot boot up an external process
break set/show/clear the breakpoint
confreg configuration register utility
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 file system
dis display instruction stream
frame print out a selected stack frame
Table 5-1
Commonly Used ROM Monitor Commands
ROMMON Command
Description
boot
image
Manually boots a Cisco IOS XE software image.
boot
image –
o
config-file-path
Manually boots the Cisco IOS XE software with a temporary
alternative administration configuration file.
confreg
Changes the config-register setting.
dev
Displays the available local storage devices.
dir
Displays the files on a storage device.
reset
Resets the node.
set
Displays the currently set ROM Monitor environmental
settings.
sync
Saves the new ROM Monitor environmental settings.
unset
Removes an environmental variable setting.
Table 5-2
Help Commands in ROMMON
Command
Description
help
or
?
Displays a summary of all available ROM Monitor commands.
-?
Displays information about command syntax.