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VM Network Connectivity Dropped under high load

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A while ago I posted about a hotfix that would correct a problem where virtual machine network connectivity would be dropped under heavy network load (original blog post here).

Unfortunately this specific fix was not included in Windows Server 2008 R2 Service Pack 1.  We have released a new hotfix to address this problem on systems running Windows Server 2008 R2 Service Pack 1.  You can download it from here:

https://support.microsoft.com/kb/2263829

Cheers,
Ben

Comments

  • Anonymous
    June 13, 2011
    Do you think we will see this in time as a Windows Update? Or should I install this on our servers now, even though we are not having the issue?

  • Anonymous
    June 13, 2011
    Hey Ben, The Hyper-V Update List for Windows Server 2008 R2 (technet.microsoft.com/.../ff394763(WS.10).aspx) says that KB2517329 supersedes KB2263829.  Are you saying that we need both hotfixes or is KB2517329 sufficient?

  • Anonymous
    June 14, 2011
    Sam - Unfortunately I do not know if / when this will be on Windows Update.  It is up to your judegment to figure out whether you want to apply this fix or not. Scott - Yes, you only need to install KB2517329 - but as that is targetted at a narrower problem I did not include it in this article. Cheers, Ben

  • Anonymous
    June 14, 2011
    Hi Ben if i previously had the hotix pre sp1 and then i install sp1 on my hosts does that overwrite the fix? so do i then need to install the new hotfix? thanks matt

  • Anonymous
    June 15, 2011
    Matt - Unfortunately you will need to install the new hotfix. Cheers, Ben

  • Anonymous
    June 16, 2011
    The comment has been removed

  • Anonymous
    June 17, 2011
    Mark - No, you do not need to update integration services. Cheers, Ben

  • Anonymous
    August 04, 2011
    Do I need to apply the hotfix to the host server as well, or just the guest VM?

  • Anonymous
    August 05, 2011
    Huskyphan - The hotfix applies only to the host server.  You do not need to do anything to the VM. Cheers, Ben

  • Anonymous
    January 13, 2012
    How to download this KB2517329, there's no download link... ?

  • Anonymous
    January 13, 2012
    @Bob from the KB page "How to obtain this update The following file is available for download from the Microsoft Download Center: www.microsoft.com/.../details.aspx "