Server losing network connectivity for a few seconds

Posted on 2011-10-21
Last Modified: 2012-06-21
Hi all -

I'm having a bit of a problem with one of my Windows Server 2003 boxes.
I noticed this because we have a program that runs from an SQL database on the server and users have started getting kicked off of the program in the middle of entering/retrieving data and it was confirmed when I was remoting into the machine and lost connection for a couple of seconds.
I ran a ping from my machine to the server and almost all of the pings were returned in <1ms, but for a short (5-10 second) period of time, I received 'Request timed out.' or ':Destination host unreachable.' errors, and then the pings started returning again.

This is definitely a major issue because I have about 15 users using the program that is on this server, and they keep getting booted off of the program every time this happens.
I don't even know where to start troubleshooting this one. Thanks for your help!
Question by:SJATechsupport
    LVL 4

    Expert Comment

    I would try a differnet port in the swithc for this server to start with.
    Any updated network card drivers available?
    try to ping from the server constantly to see if this drops out as well i.e ping th erouter constantly.

    Author Comment

    I've tried different ports on the switch as well as different NIC cards on the server. The network drivers are up to date.
    will try pinging from the server and let you know what happens

    Author Comment

    I have three ping -t's running from the server right now, the loop back, the router, and my dc. So far none of them have missed a ping.... I suppose that would mean that there is a problem with the rest of my network hardware (given that my office where I was pinging from is on the 3rd floor and the users that are having the problem are on the 1st floor) but where to start?
    LVL 89

    Expert Comment

    by:John Hurst
    I have to imagine your network but here is a feasible approach.

    You have a Server with a network cable into the main switch. See if you can isolate the cable from the first floor to the third floor - at least its route.

    Then on the third floor you have a wire coming from below. Plug this into a high quality small switch. Connect from this switch back into your third floor. Plug yourself into the small switch. This isolates you from the third floor network. Try again for stability.

    Now you can repeat on the second floor if necessary. .... Thinkpads_User

    Accepted Solution

    I took down all of the network hardware today after business hours and cold booted all of it. It might have taken care of the issue but I won't know until Tuesday at the earliest

    Author Closing Comment

    Problem just resolved itself

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