Cisco 2911

C-6
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Appendix C Using ROM Monitor
How to Use the ROM Monitor—Typical Tasks
DETAILED STEPS
Examples
The following example shows how to set the configuration register to boot to ROM monitor mode:
Router>
Router> enable
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# config-register 0x0
Router(config)# exit
Router#
*Sep 23 16:01:24.351: %SYS-5-CONFIG_I: Configured from console by console
Router# write memory
Building configuration...
[OK]
Router# reload
Proceed with reload? [confirm]
Command or Action Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
config-register 0x0
Example:
Router(config)# config-register 0x0
Changes the configuration register settings.
• The 0x0 setting forces the router to boot to the ROM
monitor at the next system reload.
Step 4
exit
Example:
Router(config)# exit
Exits global configuration mode.
Step 5
write memory
Example:
Router# write memory
Sets to boot the system image from flash memory.
Step 6
reload
Example:
Router# reload
<output deleted>
rommon 1>
Reloads the operating system.
• Because of the 0x0 configuration register setting, the
router boots to ROM monitor mode.