Hyper-V: Configure Virtual Machines to Use SR-IOV Only When Supported by the Guest Operating System

This article is intended to provide more information about a specific issue that can be identified by running a Best Practices Analyzer scan for Hyper-V. It also can be used without running a scan, as general troubleshooting and best practice information to help you configure your server appropriately. If you have troubleshooting steps or information that would improve this article, please add it. For instructions on how to edit a TechNet Wiki article, see Wiki: How to Use the Editor.

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Operating System	Windows Server 2012
Product/Feature	Hyper-V
Severity
Category

Note: The following sections provide details about the specific issue. Italics indicates UI text that appears in the Best Practices Analyzer tool for the specific issue.

Issue

One or more virtual machines are configured to use single-root I/O virtualization (SR-IOV), but the guest operating system does not support SR-IOV

Impact

SR-IOV virtual functions will not be allocated to the following virtual machines: <list of virtual machines>

Resolution

Disable SR-IOV on all virtual machines that run guest operating systems which do not support SR-IOV.

SR-IOV in Hyper-V guests is only supported in 64-bit Windows guests at this time (Windows 8/2012+)