IOS checksum error...

Discussion in 'Cisco' started by Jinesh, Nov 20, 2008.

  1. Jinesh

    Jinesh Guest

    When I boot my 3640 router this is what happening...(message
    below)..then after 2 tries it goes to ROM monitor mode
    This is when I use c3640-jk9o3s-mz.124-5a ios or c3640-jk9o3s-mz.
    123-13b ios. Ive reinstalled ios many times.
    But when I use c3640-is56-mz.112-21.P ios it doesnt create any
    problem.
    How can I solve this...I also took out ram and flash and cleaned it
    but no use....

    Any solution I can have...
    -----------------------------------------------------------------------------------------------------------------------------------------
    System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
    SOFTWARE (fc1)
    Copyright (c) 1999 by cisco Systems, Inc.
    C3600 processor with 131072 Kbytes of main memory
    Main memory is configured to 64 bit mode with parity disabled

    program load complete, entry point: 0x80008000, size: 0x1b84974
    Self decompressing the image :
    ############################################################################################################################################################################################################################################################################################################################
    [OK]

    Error : uncompressed image checksum is incorrect 0x90C3C8F1
    Expected a checksum of 0xA8C3FACD

    *** System received a Software forced crash ***
    signal= 0x17, code= 0x9, context= 0x8000eb60
    PC = 0x800080d4, Cause = 0x20, Status Reg = 0x3041f003

    System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
    SOFTWARE (fc1)
    Copyright (c) 1999 by cisco Systems, Inc.
    C3600 processor with 131072 Kbytes of main memory
    Main memory is configured to 64 bit mode with parity disabled
     
    Jinesh, Nov 20, 2008
    #1
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  2. Jinesh

    Trendkill Guest

    On Nov 20, 9:32 am, Jinesh <> wrote:
    > When I boot  my 3640 router this is what happening...(message
    > below)..then after 2 tries it goes to ROM monitor mode
    > This is when I use c3640-jk9o3s-mz.124-5a ios or c3640-jk9o3s-mz.
    > 123-13b ios. Ive reinstalled ios many times.
    > But when I use c3640-is56-mz.112-21.P ios it doesnt create any
    > problem.
    > How can I solve this...I also took out ram and flash and cleaned it
    > but no use....
    >
    > Any solution I can have...
    > -----------------------------------------------------------------------------------------------------------------------------------------
    > System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
    > SOFTWARE (fc1)
    > Copyright (c) 1999 by cisco Systems, Inc.
    > C3600 processor with 131072 Kbytes of main memory
    > Main memory is configured to 64 bit mode with parity disabled
    >
    > program load complete, entry point: 0x80008000, size: 0x1b84974
    > Self decompressing the image :
    > ############################################################################################################################################################################################################################################################################################################################
    > [OK]
    >
    > Error : uncompressed image checksum is incorrect 0x90C3C8F1
    >        Expected a checksum of 0xA8C3FACD
    >
    > *** System received a Software forced crash ***
    > signal= 0x17, code= 0x9, context= 0x8000eb60
    > PC = 0x800080d4, Cause = 0x20, Status Reg = 0x3041f003
    >
    > System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
    > SOFTWARE (fc1)
    > Copyright (c) 1999 by cisco Systems, Inc.
    > C3600 processor with 131072 Kbytes of main memory
    > Main memory is configured to 64 bit mode with parity disabled


    Clear the memory, redownload the image, check the checksum on the
    download (Cisco provides the checksum I thought), transfer to the
    memory, modify the boot statement, reboot.
     
    Trendkill, Nov 20, 2008
    #2
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  3. Jinesh

    Jinesh Guest

    Clear the memory by which command
    Im now in rom monitor mode ....or should I install the working ios
    thanks for ur help
     
    Jinesh, Nov 20, 2008
    #3
  4. Jinesh

    Trendkill Guest

    On Nov 20, 9:55 am, Jinesh <> wrote:
    > Clear the memory by which command
    > Im now in rom monitor mode ....or should I install the working ios
    > thanks for ur help


    I think its something like 'delete flash'.
     
    Trendkill, Nov 20, 2008
    #4
  5. Jinesh

    Jinesh Guest

    On Nov 20, 7:58 pm, Trendkill <> wrote:
    > On Nov 20, 9:55 am, Jinesh <> wrote:
    >
    > > Clear the memory by which command
    > > Im now in rom monitor mode ....or should I install the working ios
    > > thanks for ur help

    >
    > I think its something like 'delete flash'.


    Delete command is not there in flash and actually there is nothing in
    flash to delete bcoz I install new ios everytime
    sono chance there... is there any other way...
     
    Jinesh, Nov 20, 2008
    #5
  6. Jinesh

    Trendkill Guest

    On Nov 20, 10:13 am, Jinesh <> wrote:
    > On Nov 20, 7:58 pm, Trendkill <> wrote:
    >
    > > On Nov 20, 9:55 am, Jinesh <> wrote:

    >
    > > > Clear the memory by which command
    > > > Im now in rom monitor mode ....or should I install the working ios
    > > > thanks for ur help

    >
    > > I think its something like 'delete flash'.

    >
    > Delete command is not there in flash and actually there is nothing in
    > flash to delete bcoz I install new ios everytime
    > sono chance there... is there any other way...


    I wouldn't worry about it. Just redownload the image to your
    workstation, check the checksum (make sure its valid at that point),
    the resend to the flash. Not sure what you are using, but I have
    experienced issues with checksum issues with some file transfer
    servers, so you may need to swap your app out.
     
    Trendkill, Nov 20, 2008
    #6
  7. Jinesh

    bod43 Guest

    On 20 Nov, 15:30, Trendkill <> wrote:
    > On Nov 20, 10:13 am, Jinesh <> wrote:
    >
    > > On Nov 20, 7:58 pm, Trendkill <> wrote:

    >
    > > > On Nov 20, 9:55 am, Jinesh <> wrote:

    >
    > > > > Clear the memory by which command
    > > > > Im now in rom monitor mode ....or should I install the working ios
    > > > > thanks for ur help

    >
    > > > I think its something like 'delete flash'.

    >
    > > Delete command is not there in flash and actually there is nothing in
    > > flash to delete bcoz I install new ios everytime
    > > sono chance there... is there any other way...

    >
    > I wouldn't worry about it.  Just redownload the image to your
    > workstation, check the checksum (make sure its valid at that point),
    > the resend to the flash.  Not sure what you are using, but I have
    > experienced issues with checksum issues with some file transfer
    > servers, so you may need to swap your app out.


    This message is the result of corrupt images on the router.

    When you download the IOS image from Cisco there
    are various checksums and the file length
    shown on the download page.
    MD5 is the easiest since there is only one.

    http://www.fourmilab.ch/md5/ has a windows md5.exe
    and unix source code.
    (website is that of John Walker co-founder of Autodesk
    and I regard it as reliable.)

    You can compare the MD5 produced by the md5 program
    with the MD5 that cisco publish to determine if you
    have a good image.

    Obviously checking the length first is a decent idea.

    The usual cause of corrupt images is failure to specify
    binary mode when transferring files by ftp, or I suppose
    interrupted transfers.

    If you suspected a problem with the flash you
    could try a format of it. You can also tftpboot
    the router without the image on the flash.

    When you have copied the image to the router
    you can check the image's integrity with

    verify <filemane>

    Each image has a checksum stored internally
    and the router will re-compute the checksum and
    compare it with the stored one.
     
    bod43, Nov 21, 2008
    #7
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