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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.

For more information about best practices and scans, see Run Best Practices Analyzer Scans and Manage Scan Results.

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

The virtual function driver is not operating correctly in the guest operating system of one or more virtual machines.

Impact

Networking performance is not optimal on the following virtual machines: <list of virtual machines>

Resolution

In the guest operating system, do the following: Verify that appropriate drivers are installed and all networking devices are enabled, and check the Event log for errors or warnings.

Additional references