Copying Files With XMODEM
Written by Packet Lab | Thursday, 11 February 2010 23:00 Last Updated on Monday, 15 March 2010 19:34 by Packet Lab
To copy a Cisco IOS image to a router using the ROM monitor and the Xmodem or Ymodem protocol, use the xmodem command in ROM monitor mode.
To copy a Cisco IOS image from a local or remote computer (such as a PC, Macintosh, or UNIX workstation) to Flash memory on a router using the Xmodem protocol, use the copy xmodem: command in EXEC mode.
Copying Files With XMODEM - Part 1
Copying Files With XMODEM - Part 2
Copying Files With XMODEM Lab - Part 1
Copying Files With XMODEM Lab - Part 2
Copying Files With XMODEM Lab - Part 3
The Quick and Dirty
Using XMODEM to install an IOS image on a Cisco device should only be done if there are no other transfer (TFTP, FTP, etc.) available. Its still good to be aware of this option in case you end up in a situation where these other methods are not available. You will need a computer directly connected to the Cisco device and a terminal emulator which supports xmodem (or ymodem). And a ton of time. This method will take quite a long time to transfer a file, but if its your only option (which it may be if you have a corrupt IOS image and are stuck in ROMMON mode), then its a godsend.
Command and Configuration References
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