invalid boot magic number

Discussion in 'Cisco' started by kjsubbu, Mar 16, 2009.

  1. kjsubbu

    kjsubbu Guest


    when i was trying to upgrade the 1750 router with 12.3 IOS, in the
    middle of the upgrade
    it' was failed.

    after rebooting the router i am getting "in valid boot magic number"

    can anyone help me to recover the router.
    kjsubbu, Mar 16, 2009
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  2. kjsubbu

    bod43 Guest

    I think that this means that the image is corrupt.
    You can usually recover from the rommon with either
    a tftp boot, tftp download or an xmodem download.
    Not all of these may be avilable on your router.

    You can search the cisco site for more similar documents.
    Describes xmodem - this seems to be the best and most fully
    described. Maybe you should go for this one.

    Your image may be corrupt. If you ftp copy an image you
    MUST use binary mode.
    bod43, Mar 16, 2009
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  3. kjsubbu

    Jul 1, 2011
    Likes Received:
    I know this thread is two years old, but I recently had this problem when I purchased a 7204 off eBay and was unable to find a solution via a web search. I'm posting the link to my solution for the "device does not contain a valid magic number" error since I'm sure I wasn't the only one looking for an answer to this question. I hope I helped someone :)
, Jul 1, 2011
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