Weird 3640 Boot Up Problem

Discussion in 'Cisco' started by M, Dec 13, 2007.

  1. M

    M Guest

    I have several older 3640 routers in use yet. Actually 2 in service and a
    spare. They have multiple T1 interfaces and I use them to load balance the
    T1's with MLPPP. Whats weird is when they work they work great and run like
    months or darn near years without having any issues. I have seen on a
    number of occasions though when I shut them down to upgrade or due to a
    massive power failure sometimes they do not boot back up. What I see is the
    ethernet green lights just flash steadilly. Nothing comes accross console
    port that I can tell and they just never come to life. What seems to bring
    them back is killing power for a while then trying again and doing it over
    and over. After about an hour and a dozen or so attempts like this they
    come back to life and boot up successfully.

    Any ideas what is wrong?

    M, Dec 13, 2007
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  2. M

    CK Guest

    It happened with me too, but with PIX 506E..
    After running for almost 9-10 months it stopped working and when i
    give a cold restart it comes up automaticlaly meanwhile .. mothing
    comes on console or in logs.

    Any help wil be appreciable..

    CK, Dec 13, 2007
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  3. M

    John Guest

    After about an hour and a dozen or so attempts like this they
    seen the same in 3640. I use another workaround:
    power off, unplug all NM slots, put them back, power on.

    I suspect electrostatic issues.... maybe better grounding would fix it?
    John, Dec 13, 2007
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