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Appendix B ROM Monitor
Configuration Register
B-8
Cisco 1700 Series Router Software Configuration Guide
78-5407-03
Note The -rvariable is optional. Enteringthis variable downloads and boots
the new software but does not save the software to Flash. You can then
use the image that is in Flash the next time you enter the reload
command in the Cisco IOS software CLI.
You will see output similar to the following:
IP_ADDRESS: 10.0.0.1
IP_SUBNET_MASK: 255.255.0.0
DEFAULT_GATEWAY: 1.3.0.1
TFTP_SERVER: 223.255.254.254
TFTP_FILE: c1700-bnr2sy-mz.070298
Invoke this command for disaster recovery only.
WARNING: all existing data in all partitions on flash will be lost!
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:
Do you wish to continue? y/n: [n]:y
The router will begin to download the new file.
Pressing Ctrl-C or Break stops the transfer before the Flash memory is erased.
Configuration Register
The virtual configuration register is in 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.
To change the virtual configuration register from the ROM monitor, enter confreg
by itself for menu mode, or enter the new value of the register in hexadecimal. For
example:
confreg [
hexnum
]