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Hyper-V and Windows 7 and Windows 2008 R2 VM connectivity

Unanswered Hyper-V and Windows 7 and Windows 2008 R2 VM connectivity

  • Monday, April 16, 2012 12:15 AM
     
     
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    Hello all,

    Im running Windows 2008 R2 with Hyper-V for a while now. I'm having problems with disconnects of the VM's running inside them. I looked around on the internet and I disabled the TCP Task Offloading on the hypervisor AND on the VM's. I dont have any power saving on the nic's.

    Problem is, I still lose connectivity when browsing youtube.com on a vm for example. Is hyper-v not really cut out for this or am I missing something here.

    Thanks in advanced for the help.

     

All Replies

  • Monday, April 16, 2012 2:29 PM
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    Hi,
     
    Have you tried the following hotfix?
     
    The network connection of a running Hyper-V virtual machine may be lost under heavy outgoing network traffic on a computer that is running Windows Server 2008 R2 SP1
    http://support.microsoft.com/kb/2263829
     
    The network connection of a running Hyper-V virtual machine is lost under heavy outgoing network traffic on a Windows Server 2008 R2-based computer
    http://support.microsoft.com/kb/974909
     

    Vincent Hu

    TechNet Community Support

     
  • Monday, April 16, 2012 2:56 PM
     
     
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    Hello Vincent Hu,

    http://support.microsoft.com/kb/2263829 was allready installed and the other one gave: "Not applicable on your system". What I did manage to do is install a Legacy network adapter and my Windows 7 VM became responsive again. So my problem was solved, only not with the standard network adapter. That adapter still gives me many problems..

     
  • Monday, April 16, 2012 3:08 PM
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    Check to see that Power Management is not enabled in the drivers of the physical NIC(s).

    The power management drinvers never 'see' the VM traffic, only the managment OS traffic and can put the nics to sleep.

    Brian Ehlert
    http://ITProctology.blogspot.com
    Learn. Apply. Repeat.
    Disclaimer: Attempting change is of your own free will.

     
  • Monday, April 16, 2012 5:19 PM
     
     
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    "Green ethernet" and "Energy efficient ethernet" are both off. Which specific power management option are you referring too?

     
  • Monday, April 16, 2012 5:43 PM
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    There should be a power options tab (not in the individual driver properties).

    And, disabling TCP Offloading is not a single command - it is a number of individual driver options.  If you disabled "TCP Offloading" you did not disable TCP Task Offloading.

    Brian Ehlert
    http://ITProctology.blogspot.com
    Learn. Apply. Repeat.
    Disclaimer: Attempting change is of your own free will.

     
  • Tuesday, April 17, 2012 6:58 PM
     
     
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    In the power tab the power option was always disabled.

    Also I tried the following command now: "netsh int tcp set global chimney=disabled" 


      I have to test it out with a new VM but I cant this week. So I'll try it this weekend. 
    • Edited by DarioLea Tuesday, April 17, 2012 6:59 PM
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  • Wednesday, May 02, 2012 7:53 PM
     
     
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    Ok so I still have the problem, even in other vm's. Im currently running a Windows 2008 R2 IIS server ( virtual machine ) and if I download a file from my webserver the connection just gets dropped once a while. 
    • Edited by DarioLea Wednesday, May 02, 2012 7:55 PM
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