Cisco 2600 Series Hardware Installation Guide
Entering the ROM Monitor Mode
C-2
To enter the ROM monitor mode, do the following:
Verifying that You Are in ROM Monitor Mode
To verify that you are in the ROM monitor mode, check that the prompt displayed on your
screen is the ROM monitor mode prompt:
rommon # >
The
#
is the line number and increases incrementally at each prompt.
Tips
From the Cisco IOS software, you can configure the router to automatically enter the ROM
monitor mode the next time the router boots by setting virtual configuration register bits 3,
2, 1, and 0 to zero. From the console, enter the following configuration command:
configuration-register 0x0
The new configuration register value, 0x0, is effective after the router is rebooted with the
reload command. The router remains in the ROM monitor and does not boot the operating
system.
As long as the configuration register value remains 0x0, you must manually boot the
operating system from the console. Refer to the boot command in the “Command
Descriptions” section on page C-4.
Table C-1
Entering ROM Monitor Mode
Step
Command or Action
Purpose
1
2600> reload
Restart the router.
2
Press the
Break
key during the first 60 seconds
while the system is starting up
Forces the router to stop booting and
enter the ROM monitor mode.
