Setting The Configuration Register To Boot To Rom Monitor Mode - Cisco 2800 Series Manual

How to Use the ROM Monitor—Typical Tasks
Examples
This section provides the following example:
Sample Output for the reload Command
Use break key sequence to enter rom monitor
Router# reload
Proceed with reload? [confirm]
*Sep 23 15:54:25.871: %SYS-5-RELOAD: Reload requested by console. Reload Reason: Reload
command.
telnet> send break
*** System received an abort due to Break Key ***
signal= 0x3, code= 0x0, context= 0x431aaf40
PC = 0x4008b5dc, Cause = 0x20, Status Reg = 0x3400c102
rommon 1 >
Troubleshooting Tips
The Break key sequence varies, depending on the software on your PC or terminal. See the
Break Key Sequence Combinations During Password Recovery
What to Do Next
•
•

Setting the Configuration Register to Boot to ROM Monitor Mode

This section describes how to enter ROM monitor mode by setting the configuration register to boot to
ROM monitor mode at the next system reload or power-cycle.
Caution Do not set the configuration register by using the config-register 0x0 command after you have set the
baud rate. To set the configuration register without affecting the baud rate, use the the current
configuration register setting by entering the show ver | inc configuration command, and then replacing
the last (rightmost) number with a 0 in the configuration register command.
Using the ROM Monitor
6
Proceed to the "Displaying Commands and Command Syntax in ROM Monitor Mode (?, help, -?)"
section on page 8.
If you use the Break key sequence to enter ROM monitor mode when the router would otherwise
have booted the system image, you can exit ROM monitor mode by doing one of the following:
Enter the i or reset command, which restarts the booting process and loads the system image.
–
Enter the cont command, which continues the booting process and loads the system image.
–
tech note.
Standard
OL-5997-02