837 IOS Upgrade

Discussion in 'Cisco' started by Alt Beer, Apr 2, 2009.

  1. Alt Beer

    Alt Beer Guest

    I am new to Cisco routers. I just bought a used 837, managed to configure
    it and it is working fine.
    Its IOS is an older version and wont work with the latest SDM. Is there a
    version of SDM which will work with my 837's IOS version?

    Or maybe I should upgrade the IOS but later IOS versions I have seen require
    larger memory than my 837. Does anyone know of an IOS which will work with
    SDM and which will work with the memory level of my 837?

    Thank you

    Currently my 837 has:

    IOS (tm) C837 Software (C837-K9O3Y6-M), Version 12.2(8)YN, EARLY DEPLOYMENT
    Synched to technology version 12.2(11.2u)T

    CISCO C837 (MPC857DSL) processor (revision 0x400) with 29492K/3276K bytes of
    Processor board ID AMB07170HFG (3265805387), with hardware revision 0000
    CPU rev number 7
    Bridging software.
    1 Ethernet/IEEE 802.3 interface(s)
    1 ATM network interface(s)
    128K bytes of non-volatile configuration memory.
    8192K bytes of processor board System flash (Read/Write)
    2048K bytes of processor board Web flash (Read/Write)
    Alt Beer, Apr 2, 2009
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  2. Alt Beer


    Apr 2, 2009
    Likes Received:
    first of all you will need to access the router through a console cable, and connect the router with an ethernet cable to the pc, and setup a tftp server at your pc with the ios you would like to put on.
    then simply write copy tftp flash
    it will ask you for the ip address of the tftp server and then the file name.
    or you can see at:

    if in doubt ask me again.
    binary_dreamer, Apr 2, 2009
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  3. Alt Beer

    bod43 Guest

    I have run 837s with less then the recommended memory

    memory-size iomem

    was the key.

    *HOWEVER* note that you might easily end up
    with a router that won't boot which will require recovery
    with xmodem and confreg fidddling.

    Of course I was not using SDM and the extra memory might
    be needed for it:)

    check your memory usage with sh mem

    router#sh mem
    Head Total(b) Used(b) Free(b) Lowest(b)
    Processor 83099124 70676188 29800736 40875452
    38709808 36842076
    I/O 7400000 12582912 3948464 8634448
    8513040 8517372

    paying particular attention to I/O and see if you can
    change the iomem percent and still have a workign router.
    bod43, Apr 2, 2009
  4. Alt Beer

    Alt Beer Guest

    If I could find a copy of SDM Express I'd try that.
    Maybe it doesn't require as much memory as the full SDM

    I've searched but cant find it.
    Alt Beer, Apr 3, 2009
  5. Alt Beer


    Apr 3, 2009
    Likes Received:

    Thank you binary_dreamer but I know how to do the upgrade. I need to know what version IOS I can upgrade to having regard to the amount of memory my 837 has.
    jmort, Apr 3, 2009
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