Article ID: 981836 - View products that this article applies to.
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Summary

This article (KB981836) provides a fix for a network connection problem in which the connection drops on Windows Server 2003-based Hyper-V virtual machines (VMs). This issue occurs when the VMs are running under a heavy load. For detailed information, see the “Symptoms,” “Cause,” and “Resolution” sections of this article.

To download the fix for this issue, click the View and request hotfix downloads link that is located on the upper-left of the screen.

Symptoms

Consider the following scenario:
  • You install the Hyper-V role on a computer that is running Windows Server 2008 R2.
  • The computer hosts a virtual machine (VM) that is running Windows Server 2003.
  • The VM is running under a heavy load.
In this scenario, the network connection of the VM is lost and then resumes. The length of time in which there is no network connection may last from several seconds to several minutes.

When this connection problem occurs, one or both of the following events are logged in the System log on the VM:
Event Type: Warning
Event Source: netvsc
Event Category: None
Event ID: 5
Date: <date>
Time: <time>
User: N/A
Computer: <computer name>
Description: The miniport '<network adapter name>' hung.
Event Type: Warning
Event Source: netvsc
Event Category: None
Event ID: 4
Date: <date>
Time: <time>
User: N/A
Computer: <computer name>
Description: The miniport '<network adapter name>' reset.

Resolution

This hotfix is also available at Microsoft Update Catalog.

After you install this hotfix on the Hyper-V server, you must update the integration components in the VM that is running Windows Server 2003. To do this, open the Virtual Machine Connection tool to connect to the VM in Hyper-V Manager, and then click Insert Integration Services Setup Disk on the Action menu.

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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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 Web site:
http://support.microsoft.com/contactus/?ws=support
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 be running Windows Server 2008 R2 on the computer. Additionally, the computer must have the Hyper-V role installed.

Registry information

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

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 R2 file information notes
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformService branch
Windows5.x-hypervintegrationservices-x64.msiNot applicable1,454,59203-Apr-201007:43Not applicableNot applicable
Netvsc50.sys6.1.7600.20683105,47203-Apr-201003:04x64Not applicable
Netvsc60.sys6.1.7600.20683172,54403-Apr-201003:04x64Not applicable
Netvscres.dll6.1.7600.1638542,49614-Jul-200901:30x64Not applicable
Passthruparser.sys6.1.7600.1638520,48013-Jul-200923:42x64AMD64_WSTORVSP.INF_31BF3856AD364E35_6.1.7600.20683_NONE_8ABC4AACE145A298
Storvsp.sys6.1.7600.20683120,32003-Apr-201003:04x64AMD64_WSTORVSP.INF_31BF3856AD364E35_6.1.7600.20683_NONE_8ABC4AACE145A298
Vhdparser.sys6.1.7600.1638517,40813-Jul-200923:42x64AMD64_WSTORVSP.INF_31BF3856AD364E35_6.1.7600.20683_NONE_8ABC4AACE145A298
Vmbus.sys6.1.7600.20683200,58403-Apr-201007:35x64Not applicable
Vmbuscoinstaller.dll6.1.7600.16385130,04813-Jul-200923:42x64Not applicable
Vmbuspipe.dll6.1.7600.1638515,36013-Jul-200923:42x64Not applicable
Vmbusres.dll6.1.7600.1638544,54414-Jul-200901:30x64Not applicable
Winhv.sys6.1.7600.1638552,30414-Jul-200901:48x64Not applicable
Vmsntfy.dll6.1.7600.2068372,19203-Apr-201007:27x64Not applicable
Vmswitch.sys6.1.7600.20683403,96803-Apr-201003:04x64Not applicable
Windows5.x-hypervintegrationservices-x86.msiNot applicable1,014,27203-Apr-201008:11Not applicableNot applicable

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 Server 2008 R2

Additional files for all supported x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_0fdc9776732b71cc126d1e61246fdebe_31bf3856ad364e35_6.1.7600.20683_none_ab5ace2b4574fadc.manifest
File versionNot applicable
File size1,082
Date (UTC)06-Apr-2010
Time (UTC)07:16
File nameAmd64_6f5b35e519a8ee06f349b3d193b8ab09_31bf3856ad364e35_6.1.7600.20683_none_635289eb0f7cb1ae.manifest
File versionNot applicable
File size1,082
Date (UTC)06-Apr-2010
Time (UTC)07:16
File nameAmd64_microsoft-hyper-v-g..aller-win5x-package_31bf3856ad364e35_6.1.7600.20683_none_2ea9bb90bd24947d.manifest
File versionNot applicable
File size2,273
Date (UTC)03-Apr-2010
Time (UTC)09:36
File nameAmd64_microsoft-hyper-v-g..aller-win60-package_31bf3856ad364e35_6.1.7600.20683_none_94f598c4ee356376.manifest
File versionNot applicable
File size3,369
Date (UTC)03-Apr-2010
Time (UTC)10:10
File nameAmd64_wnetvsc.inf_31bf3856ad364e35_6.1.7600.20683_none_b39abd74024c3ab0.manifest
File versionNot applicable
File size2,657
Date (UTC)06-Apr-2010
Time (UTC)07:16
File nameAmd64_wstorvsp.inf_31bf3856ad364e35_6.1.7600.20683_none_8abc4aace145a298.manifest
File versionNot applicable
File size3,047
Date (UTC)06-Apr-2010
Time (UTC)07:16
File nameAmd64_wvmbus.inf_31bf3856ad364e35_6.1.7600.20683_none_95fd3749dcd7cc6a.manifest
File versionNot applicable
File size3,731
Date (UTC)06-Apr-2010
Time (UTC)07:16
File nameAmd64_wvms_pp.inf_31bf3856ad364e35_6.1.7600.20683_none_bf6225082432cf76.manifest
File versionNot applicable
File size2,772
Date (UTC)03-Apr-2010
Time (UTC)09:37
File nameUpdate.mum
File versionNot applicable
File size2,371
Date (UTC)06-Apr-2010
Time (UTC)07:16
File nameX86_microsoft-hyper-v-g..aller-win5x-package_31bf3856ad364e35_6.1.7600.20683_none_d28b200d04c72347.manifest
File versionNot applicable
File size2,269
Date (UTC)03-Apr-2010
Time (UTC)08:33
File nameX86_microsoft-hyper-v-g..aller-win60-package_31bf3856ad364e35_6.1.7600.20683_none_38d6fd4135d7f240.manifest
File versionNot applicable
File size3,363
Date (UTC)03-Apr-2010
Time (UTC)08:47

Properties

Article ID: 981836 - Last Review: May 24, 2013 - Revision: 4.0
Applies to
  • Windows HPC Server 2008 R2
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Standard
  • Microsoft Hyper-V Server 2008 R2
Keywords: 
kbhyperv kbexpertiseinter kbhotfixserver kbqfe kbfix kbautohotfix kbsurveynew kbprb KB981836

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