VMQs cannot be created or the NVGRE offloads incorrectly on a Windows 8.1 or Windows Server 2012 R2-based Hyper-V host

Applies to: Windows 8.1 EnterpriseWindows 8.1 ProWindows 8.1

This article describes an issue when you try to create Virtual Machine Queues (VMQs) in Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2. The issue is resolved in hotfix 2965178 that is described in this article, and it has a prerequisite.

Symptoms


Consider the following scenario:

  • You have Hyper-V running on a Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2- based computer.
  • You create a virtual machine switch on the load balancing failover (LBFO) by using Mellanox NIC adapters.
  • You enable Network Virtualization using Generic Routing Encapsulation (NVGRE) on the LBFO.
In this scenario, the virtual Receive Side Scaling (vRSS) does not work correctly, and the VMQs cannot be created automatically for the teamed adapters. Therefore, NVGRE cannot offload correctly.

Resolution


To resolve this issue, install the hotfix that is described in this article.

Note After you install this hotfix, all processors load balance correctly, and the network throughput is increased.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must first install the update 2919355 on Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information


For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates.

Additional file information

Additional file information for Windows 8.1 and for Windows Server 2012 R2

Additional files for all supported x86-based versions of Windows 8.1
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File size703
Date (UTC)04-May-2014
Time (UTC)06:10
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File nameX86_microsoft-windows-ndis-implatform_31bf3856ad364e35_6.3.9600.17114_none_ead686f15f3ff230.manifest
File versionNot applicable
File size48,198
Date (UTC)04-May-2014
Time (UTC)06:10
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
File propertyValue
File nameAmd64_6448d2db0fd2672a26887cc4316d9b94_31bf3856ad364e35_6.3.9600.17114_none_ee9ca76ca075a63a.manifest
File versionNot applicable
File size707
Date (UTC)04-May-2014
Time (UTC)06:50
PlatformNot applicable
File nameAmd64_c8c95fb70f848c7320c2e8e551e5edfa_31bf3856ad364e35_6.3.9600.17114_none_f9a96ffd36f6029f.manifest
File versionNot applicable
File size707
Date (UTC)04-May-2014
Time (UTC)06:50
PlatformNot applicable
File nameAmd64_ff10f186f568824d1e94afb44a8548e5_31bf3856ad364e35_6.3.9600.17114_none_8671793fd47acab8.manifest
File versionNot applicable
File size701
Date (UTC)04-May-2014
Time (UTC)06:50
PlatformNot applicable
File nameAmd64_microsoft-windows-ndis-implatform_31bf3856ad364e35_6.3.9600.17114_none_46f52275179d6366.manifest
File versionNot applicable
File size48,202
Date (UTC)04-May-2014
Time (UTC)06:50
PlatformNot applicable
File nameAmd64_microsoft-windows-ndis-lbfo_31bf3856ad364e35_6.3.9600.17114_none_026df58fea8f3828.manifest
File versionNot applicable
File size21,645
Date (UTC)03-May-2014
Time (UTC)12:17
PlatformNot applicable
File nameWow64_microsoft-windows-ndis-implatform_31bf3856ad364e35_6.3.9600.17114_none_5149ccc74bfe2561.manifest
File versionNot applicable
File size20,681
Date (UTC)03-May-2014
Time (UTC)09:51
PlatformNot applicable
Additional files for Windows RT 8.1
File propertyValue
File nameArm_aa4350cb43b147cf93445dd235043011_31bf3856ad364e35_6.3.9600.17114_none_0b2a9a832fd3ccb0.manifest
File versionNot applicable
File size703
Date (UTC)04-May-2014
Time (UTC)06:25
PlatformNot applicable
File nameArm_microsoft-windows-ndis-implatform_31bf3856ad364e35_6.3.9600.17114_none_ead8f9495f3d10f6.manifest
File versionNot applicable
File size48,198
Date (UTC)04-May-2014
Time (UTC)06:25
PlatformNot applicable
Third-party information disclaimer

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.