Procedures For Recovering Boot And System Images; Using The Rom Monitor; Using The Xmodem Command - Cisco 2611 - Router - EN User Manual

Procedures for Recovering Boot and System Images

If your Cisco 2600 series router experiences difficulties and no longer contains a valid
Cisco IOS software image in Flash memory, you can recover the Cisco IOS image using
one of the following ROM monitor commands:
•
xmodem—Use this if the computer attached to your console has a terminal emulator
that has Xmodem capability.
•
tftpdnld—Use this if you have a TFTP server directly connected to the Ethernet 0 port
or Token Ring 0 port.

Using the xmodem Command

The xmodem command establishes a connection between a console and the router console
port for disaster recovery if both the boot and system images are erased from Flash memory.
xmodem [filename]—Establishes an Xmodem connection between the console and the
router. The optional parameter filename specifies the source file containing the Cisco IOS
image.
Other options include the following:
•
c—Use cyclic redundancy check (CRC-16)
•
y—Use Ymodem transfer protocol
•
r—Copy the image to dynamic random-access memory (DRAM) for launch
•
x—Do not launch image on completion of download
Procedures for Recovering Boot and System Images
Using the ROM Monitor C-9