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Cisco 3700 Series Routers Hardware Installation Guide
OL-2180-08
Appendix B Using the ROM Monitor
ROM Monitor Syntax Conventions
help monitor builtin command help
history monitor command history
iomemdef
set IO mem to a default 25%
meminfo main memory information
repeat repeat a monitor command
reset system reset
rommon-pref select
ROMMON
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
rommon 2>
Note
Not all ROM monitor commands are available on all platforms.
To display information about command syntax, enter the command name followed by
-?
. ROM monitor
commands are case-sensitive. Enter commands exactly as shown. You can end any command by
generating a Break (system interrupt) at the console.
ROM Monitor Syntax Conventions
ROM monitor syntax in this appendix uses the following conventions:
•
Square brackets [ ] denote an optional element. In the following example, the element
abc
is not
required, but you can specify it if you choose:
command
[
abc
]
•
If a minus option is followed by a colon (for example, [
-s:
]) you must provide an argument for the
option.
•
A term in italics means that you must fill in the appropriate information. In the following example,
you replace the term in italics with the interface type you are using:
command
interface-type
ROM Monitor Command Descriptions
This section describes some useful ROM monitor commands. See the Cisco IOS configuration guides
and command references for more information on ROM monitor commands.
Boot Commands in the ROM Monitor
The router always boots first from a Cisco IOS software image in CompactFlash memory, because there
is no separate, dedicated boot helper image ([rx]boot). The first image in CompactFlash memory
functions as the boot helper image, but you can override this by setting the BOOTLDR Monitor
