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Cisco 831 router - deleted the flash and now cannot restore to working state - HELP!

Posted on 2007-10-18
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Last Modified: 2010-04-17
Help! I have a Cisco 831 router that was running CRWS, I attempted an upgrade to SDM but in the process deleted the entire flash memory by accident and on recommendation from a forum erased the NVRAM and once I rebooted the router it is now completely useless. I have connected the router via the console port and hyperterminal and this is what is displayed upon powering on the router.

System Bootstrap, Version 12.2(8r)YN, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 2002 by cisco Systems, Inc.
C800/SOHO series (Board ID: 29-129) platform with 32768 Kbytes of main memory

boot: cannot determine first file name on device "flash:"ú
System Bootstrap, Version 12.2(8r)YN, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 2002 by cisco Systems, Inc.
C800/SOHO series (Board ID: 29-129) platform with 32768 Kbytes of main memory

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

System Bootstrap, Version 12.2(8r)YN, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 2002 by cisco Systems, Inc.
C800/SOHO series (Board ID: 29-129) platform with 32768 Kbytes of main memory

rommon 1 >

Myy knowledge of command line cisco is very limited to an idiots fool proof guide on how to restore this router to a working state with SDM would be greatly appreciated.

Many thanks.
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Question by:benofishal
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by:btassure
ID: 20107664
How old is it? If it is still under warranty you might be able to get Cisco to provide you with support and/or give you a replacement IOS. When you wiped the flash you effectively took out the operating system for the router. You need to get it back on somehow either by getting a copy from elsewhere (probably chargeable) or getting a copy from Cisco (probably free if you are under warranty). Once you have that you can put it back on the router and force it to boot.
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benofishal earned 0 total points
ID: 20107961
Okay the router is no longer under warranty as it is a few years old. So I will try to obtain an IOS image from somewhere. Can anyone provide me with details of what version I need as there seem to be hundreds, and can someone also explain the procedure of reflashing the router with a new operating system via the console port and getting it to boot. Also the procedure to install SDM would be much appreciated.

Thanks.
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Assisted Solution

by:trinak96
trinak96 earned 1000 total points
ID: 20109120
Follow this procedure to load the IOS when you get one :
http://www.cisco.com/en/US/products/hw/routers/ps221/products_tech_note09186a00800942dc.shtml

Ths IOS version you get will depend on what you are using the router for, if it's just internet access then the IPBASE version is what you'll need.
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