TFTP_FILE: c880-advsecurityk9-mz
Do you wish to continue? y/n: [n]:
Step 3
If you are sure that you want to continue, enter y in response to the question in the output:
Example:
Do you wish to continue? y/n: [n]:y
The router begins to download the new file.
If you mistakenly entered yes, you can enter Ctrl-C or Break to stop the transfer before the flash memory is erased.
Configuration Register
The virtual configuration register is in nonvolatile RAM (NVRAM) and has the same functionality as other
Cisco routers. You can view or modify the virtual configuration register from either the ROM monitor or the
operating system software. Within the ROM monitor, you can change the configuration register by entering
the register value in hexadecimal format, or by allowing the ROM monitor to prompt you for the setting of
each bit.
Changing the Configuration Register Manually
To change the virtual configuration register from the ROM monitor manually, enter the confreg command
followed by the new value of the register in hexadecimal format, as shown in the following example:
rommon 1 > confreg 0x2101
You must reset or power cycle for new config to take effect
rommon 2 >
The value is always interpreted as hexadecimal. The new virtual configuration register value is written into
NVRAM but does not take effect until you reset or reboot the router.
Changing the Configuration Register Using Prompts
Entering the confreg command without an argument displays the contents of the virtual configuration register
and a prompt to alter the contents by describing the meaning of each bit.
In either case, the new virtual configuration register value is written into NVRAM but does not take effect
until you reset or reboot the router.
The following display shows an example of entering the confreg command:
rommon 7> confreg
Configuration Summary
enabled are:
console baud: 9600
boot: the ROM Monitor
do you wish to change the configuration? y/n [n]: y
enable “diagnostic mode”? y/n [n]: y
enable “use net in IP bcast address”? y/n [n]:
Cisco 800 Series Integrated Services Routers Software Configuration Guide
OL-31704-02 405
ROM Monitor
Configuration Register
