Negative ping response times

Posted on 2010-01-04
Last Modified: 2013-11-29
We have new server, Dell R710 with 2 Intel Quad Core processors. Server has Windows 2008 x64, using only one GB NIC of four.
Some computers ping to this server with negative response time: -1ms, -2ms, sometimes normaly, 1ms.
Why this could happen?
Question by:Vaidas911
    LVL 68

    Accepted Solution

    I can't verify this at the moment, but I read people suggest editing the boot.ini file and adding the parameter:
    Adding the "/usepmtimer" parameter to the boot.ini file configures the Windows operating system to use the PM_TIMER, rather than the Time Stamp Counter.
    LVL 6

    Author Comment

    Do you have to do this on client PC, or server?
    LVL 14

    Expert Comment

    Are you running Hyper-V? Is the server you are pinging a VM?
    LVL 68

    Expert Comment

    >> Do you have to do this on client PC, or server? <<
    --> Client PC
    LVL 6

    Author Comment

    charlestasse: we are not using virtualization in that infrastructure
    woolmilkporc: I will try your boot.ini fix
    LVL 26

    Expert Comment

    This is the MS instruction similar to the above post, but it's done on the server side. Check it out:


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