boot: cannot determine first file name on device "flash"

Unanswered Question
Jan 2nd, 2008

I have Cisco 837. By accident the ios image is erased. I guess that the only solution is: using xmodem to upload the ios to the flash. Could someone tell me how to do that? Is it possible to do it by using Hyperterminal and how?

Thanks in advanced.


I have this problem too.
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Jon Marshall Wed, 01/02/2008 - 05:03

Hi Peter

Please see the 2 attached links which should guide you through the procedure

1) Xmodem using hyperterm

2) Specific info for 800 series routers

Please come back if you need further help.


rijperwaard Wed, 01/02/2008 - 06:19

Dear Jon,

I have tried with the option 1 just like in the document explained how to restore ios for 1603 router. I got the answer back that the Xmodem doesn't react. I only use xmodem protocol inside Hyper Termninal to try to restore ios. Is it enough or i need a special Xmodem software?


Where can i enter the command:

IP_ADDRESS= ip_address etc.

The IOS does not exist anymore. It goes straight to the Rom Monitor by booting.



Jon Marshall Thu, 01/03/2008 - 00:17


No problem, glad to have helped and thanks for letting me know you have fixed it.


bvsnarayana03 Wed, 01/02/2008 - 07:09

tftpdnld is an easier method as compared to xmodem. The second link given by Jon is really helpful.


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