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Cisco 3640 in ROMM Mode

I have Cisco 3640 router. I upgraded the ios and when i rebooted the router the routercrashed. I went to the cisco romm modem and changed the

config register to 0*0

and reset the router. Once the router booted again the romm modem i gave the command

xmodem -c c:\programfiles\ciscosystems\ciscotftpserver\c3640-is-mz.122-13a.bin

I got the message All the existing data will be erased and do you wish to continue

It gave Ready to receive file c:programfilesciscosystemsciscotftpserverc3640-is-mz.122-13a.bin


Time waiting for data- aborting download

If i try using Hyoperterm transfer and receive file using 1k xmodem and ordinary xmodem

also i am getting errors.

Can some one advice me how to proceed for makeing this router back up.

Thanks in Advance

Cisco Employee

Re: Cisco 3640 in ROMM Mode

Here is the link for "ROMmon Image Download Via Console Port Using Xmodem with Increased Console Speed"

For detailed Xmodem ios upgrade via console, visit

Now if that doesn't work, you can use tftpdnld command, visit following url for that


As last resort, you can upgrade the flash image by booting the router frrom bootflash image. Here is the procedure for that