Solved: 2811 - Problem with boot "cannot load flash"

Christian Maus · ‎11-03-2016

Hi Community,

i have some problems to use my cisco c2811 router. After accidentley deleting the flash:/.bin file, my IOS is not available anymore. For that reason, after restart, the router is in a continous loop with boot: cannot fload "flash"

Is there any possibiliy to setup the device with new IOS file, which could be installed from usbflash1: e.g.

I cannot enter break sequence (CTRL+BREAK over Secure CRT).

Error code:

Upgrade ROMMON initialized
PASSWORD RECOVERY FUNCTIONALITY IS DISABLED
program load complete, entry point: 0x8000f000, size: 0xcb80
program load complete, entry point: 0x8000f000, size: 0xcb80
loadprog: bad file magic number: 0x0
boot: cannot load "flash:"
c2811 platform with 262144 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled

Leo Laohoo · ‎11-03-2016

Is there any possibiliy to setup the device with new IOS file, which could be installed from usbflash1: e.g.

To get the ISR G1 to boot an IOS (from ROMmon) using USB flash, the ROMmon itself needs to be upgraded first.

Next, is there a compact flash currently in the slot? If so, eject the CF and copy the IOS into the CF using a multi-card reader.

View solution in original post

Leo Laohoo · ‎11-03-2016

Is there any possibiliy to setup the device with new IOS file, which could be installed from usbflash1: e.g.

To get the ISR G1 to boot an IOS (from ROMmon) using USB flash, the ROMmon itself needs to be upgraded first.

Next, is there a compact flash currently in the slot? If so, eject the CF and copy the IOS into the CF using a multi-card reader.

Christian Maus · ‎11-03-2016

Hi Leo,

i was not aware, that it is "so" easy to just copy the IOS file to the CF card.

This worked directly (more effort to find a card reader :) )

Thanks for your help! Appreciated!

Leo Laohoo · ‎11-03-2016

Don't forget to mark this thread as "Answered" if everything is working.