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  • Clients stop communicating with Servers

    Hi,

    I have a tough problem going around a week in my network. Client PCs stop communicating with the servers. This is happening randomly. I am not able to ping with one server, but at the same time I can ping with another same network server. And one more thing, If I am not able to ping from one PC at the same time I can ping the same server with another PC. This is happening with different PCs.

    I checked the servers ,switches, everything seems to be fine. I noticed that when the ping command not working if I remove the cable and plug it again it will start pinging. Also when ping not working I can tracert the server and it is positive and starts pinging. If I put the ping command continuously it is not getting disconnecting.

    Very strange problem and I am not able to tackle. Please help if anybody gone through a similar case.

    Thanks,

    Manoj Krishnan

  • #2
    Re: Clients stop communicating with Servers

    There's a lot of info not originally provided which would help us:
    *-When you unplug a cable and re-connect, is it to a PC which can't ping, or the server that the ping fails to?
    *-Are the client PCs in the same subnet as the servers, or is there routing involved?
    *-Are your clients using fixed addresses or DHCP leases? And how big is your address pool vs the count of clients?
    *-When 1 server can't be ping'd but another can, is it always the same server which fails? How many servers are involved?
    *-Before you pull a cable and re-connect, have you looked at the status of the switchport you want to pull the cable out of? Is it up/up, up/down, or what?
    *-Has there been any major changes like adding of new links to switches, or some other expansion of the network? Spanning-tree protocol could be a culprit, here.

    A simple drawing with some more detail would be appreciated, to include address ranges, etc.
    *RicklesP*
    MSCA (2003/XP), Security+, CCNA

    ** Remember: credit where credit is due, and reputation points as appropriate **

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    • #3
      Re: Clients stop communicating with Servers

      Thans Rickles,

      I found out the root cause. It was a malfunctioning or out dated Linksys accesspoint which was causing the problem. I took long time to identify this because this problem was happening randomly with different computers. When I got this problem continuously in my PC I monitored and power off the switches step by step and found that AP. Now I updated the firmware and reconfigured it and working fine since last 24 hours.

      Many Thanks,
      Manoj Krishnan

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      • #4
        Re: Clients stop communicating with Servers

        Glad you found it! And thanks for letting us know what it was.
        *RicklesP*
        MSCA (2003/XP), Security+, CCNA

        ** Remember: credit where credit is due, and reputation points as appropriate **

        Comment

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