Cisco Systems 3700 Series manual Procedure for the xmodem Command

Appendix B Using the ROM Monitor

Recovering Cisco IOS Software Images

Procedure for the xmodem Command

To copy the Cisco IOS software image from a console to CompactFlash memory, perform the following steps:

Step 1 Connect the console using the instructions in the “Connecting to a Console Terminal or Modem” section on page 3-22.

Step 2 Power up the router. The power-on self-test diagnostics run, and the boot ROM searches for a valid boot image and Cisco IOS software image in CompactFlash memory. If the boot image and Cisco IOS software image are not found, the ROM monitor prompt appears:

rommon 1>

Step 3 Enter the xmodem command and the name of the source file containing the Cisco IOS software image:

rommon 1> xmodem filename

Step 4 Messages similar to the following appear:

Do not start upload program yet...

File size	Checksum	File name
2537948 bytes	(0x26b9dc)	3700-boot-l

WARN: This operation will ERASE bootflash. If the xmodem download to bootflash fails, you will lose any good image you may already have in bootflash.

Invoke this application only for disaster recovery.

Do you wish to continue? [yes/no]:

Step 5 Enter yes to copy the Cisco IOS software image into CompactFlash memory. Messages similar to the following appear:

Ready to receive file prog ...

Erasing flash at 0x3000000

program flash location 0x3000000

Transfer complete!

The router is now ready to boot from the Cisco IOS software image. Enter the ROM monitor reset command to reboot the router.

Note If you have set the console speed to 115200, you may wish to reset it to the previous speed or to the factory default speed (typically 9600 bps). See the “Configuration Register” procedure on page B-6.

Cisco 3700 Series Routers Hardware Installation Guide

OL-2180-08 B-9