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Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
Chapter 2 Command-Line Interfaces
ROMMOM Command-Line Interface
To list keywords or arguments, enter a question mark in place of a keyword or argument. Include a space
before the question mark. This form of help is called command syntax help, because it reminds you
which keywords or arguments are applicable based on the command, keywords, and arguments you have
already entered.
Switch# configure ?
memory Configure from NV memory
network Configure from a TFTP network host
overwrite-network Overwrite NV memory from TFTP network host
terminal Configure from the terminal
<cr>
To redisplay a command you previously entered, press the Up Arrow key or Ctrl-P. You can continue
to press the Up Arrow key to see the last 20 commands you entered.
Tip If you are having trouble entering a command, check the system prompt and enter the question mark (?)
for a list of available commands. You might be in the wrong command mode or using incorrect syntax.
Type exit to return to the previous mode. Press Ctrl-Z or enter the end command in any mode to
immediately return to privileged EXEC mode.
ROMMOM Command-Line Interface
ROMMON is a ROM-based program that is involved at power-up or reset, or when a fatal exception error
occurs. The switch enters ROMMON mode if the switch does not find a valid software image, if the
NVRAM configuration is corrupted, or if the configuration register is set to enter ROMMON mode.
From the ROMMON mode, you can load a software image manually from Flash memory, from a network
server file, or from bootflash.
You can also enter ROMMON mode by restarting the switch and pressing Ctrl-C during the first five
seconds of startup.
Note Ctrl-C is always enabled for 60 seconds after you reboot the switch, even if Ctrl-C is configured to be
off in the configuration register settings.
When you enter ROMMON mode, the prompt changes to rommon 1>. Use the ? command to see the
available ROMMON commands.
For more information about the ROMMON commands, refer to the
Catalyst 4500 Series Switch Cisco IOS Command Reference.