A computer that is connected to an IEEE 802.1x-authenticated network via another 802.1x enabled device does not connect to the correct network

Support for Windows Vista Service Pack 1 (SP1) ends on July 12, 2011. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows.

Symptoms

Consider the following scenario:

  • You connect a computer to an IEEE 802.1X authenticated network through an 802.1x enabled device, such as a Voice over IP (VOIP) telephone.

  • You put the computer into hibernation (system power state S4) or into sleep (system power state S3).

  • You resume the computer.

In this scenario, the computer does not reconnect to the same authenticated Virtual Local Area Network (VLAN). Instead, the computer connects to an isolated network.

Note This issue does not occur if you directly connect the computer to an 802.1X-enabled switch.

Resolution

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=supportNote 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, your computer must be running one of the following operating systems:

  • Windows Vista Service Pack 1 (SP1)

  • Windows Vista Service Pack 2 (SP2)

  • Windows Server 2008

  • Windows Server 2008 Service Pack 2 (SP2)

  • Windows 7

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (SP1)

Note This issue also occurs in Windows XP. However, a hotfix will not be made available because the issue was found outside of the Windows XP mainstream support life cycle.For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:

935791 How to obtain the latest Windows Vista service pack

For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

968849 How to obtain the latest service pack for Windows Server 2008

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

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.

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 Vista and Windows Server 2008 file information notes

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both of these operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.0.600
    1.22xxx

    Windows Vista and Windows Server 2008

    SP1

    LDR

    6.0.600
    2.22xxx

    Windows Vista and Windows Server 2008

    SP2

    LDR

  • Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.

For all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Ndisuio.sys

6.0.6001.22563

16,896

12-Nov-2009

15:50

x86

Ndisuio.sys

6.0.6002.22267

16,896

12-Nov-2009

15:37

x86

Ndis.sys

6.0.6001.22563

526,424

12-Nov-2009

18:29

x86

Ndismigplugin.dll

6.0.6001.22563

129,024

12-Nov-2009

17:51

x86

Ndistrace.mof

4,548

01-Apr-2009

19:00

Not applicable

Ndis.sys

6.0.6002.22267

526,408

12-Nov-2009

18:18

x86

Ndismigplugin.dll

6.0.6002.22267

129,024

12-Nov-2009

17:38

x86

Ndistrace.mof

4,548

03-Apr-2009

21:01

Not applicable

For all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Ndisuio.sys

6.0.6001.22563

22,016

12-Nov-2009

16:16

x64

Ndisuio.sys

6.0.6002.22267

22,016

12-Nov-2009

15:55

x64

Ndis.sys

6.0.6001.22563

733,256

12-Nov-2009

19:05

x64

Ndismigplugin.dll

6.0.6001.22563

137,216

12-Nov-2009

18:23

x64

Ndistrace.mof

4,548

01-Apr-2009

16:10

Not applicable

Ndis.sys

6.0.6002.22267

737,336

12-Nov-2009

18:24

x64

Ndismigplugin.dll

6.0.6002.22267

137,216

12-Nov-2009

17:43

x64

Ndistrace.mof

4,548

03-Apr-2009

20:48

Not applicable

For all supported IA-64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Ndisuio.sys

6.0.6001.22563

51,712

12-Nov-2009

16:10

IA-64

Ndis.sys

6.0.6001.22563

1,644,616

12-Nov-2009

18:51

IA-64

Ndismigplugin.dll

6.0.6001.22563

314,368

12-Nov-2009

18:09

IA-64

Ndistrace.mof

4,548

01-Apr-2009

16:10

Not applicable

Ndis.sys

6.0.6002.22267

1,645,128

15-Nov-2009

19:49

IA-64

Ndismigplugin.dll

6.0.6002.22267

314,368

15-Nov-2009

19:12

IA-64

Ndistrace.mof

4,548

03-Apr-2009

20:48

Not applicable

Windows 7 and Windows Server 2008 R2 file information notes

Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.760
    0.21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • 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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Ndisuio.sys

6.1.7600.21083

46,080

02-Nov-2011

19:37

x86

Ndisuio.sys

6.1.7601.21853

46,080

02-Nov-2011

20:51

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Ndisuio.sys

6.1.7600.21083

56,832

02-Nov-2011

20:09

x64

Ndisuio.sys

6.1.7601.21853

56,832

02-Nov-2011

22:08

x64

Workaround

To work around this issue, follow these steps:

  • Restart the computer.

  • Reset the network adapter. To do this, start an elevated command prompt, type netsh lan reconnect, and then press Enter.

  • Unplug and then reconnect the network cable.

  • Use a third-party network driver, such as Cisco DNE. If a third-party driver is installed, this driver changes the network behavior and enables automatic authentication.

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 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

Update.mum

File version

Not Applicable

File size

2,498

Date (UTC)

03-Nov-2011

Time (UTC)

16:58

Platform

Not Applicable

File name

X86_8ecc0987e56452955a6db808386096ef_31bf3856ad364e35_6.1.7600.21083_none_8b03736e56c91786.manifest

File version

Not Applicable

File size

695

Date (UTC)

03-Nov-2011

Time (UTC)

16:58

Platform

Not Applicable

File name

X86_bb36b4c7571e4a5fc1ade1cf386e23b1_31bf3856ad364e35_6.1.7601.21853_none_88a31246d3089d70.manifest

File version

Not Applicable

File size

695

Date (UTC)

03-Nov-2011

Time (UTC)

16:58

Platform

Not Applicable

File name

X86_microsoft-windows-ndisuio_31bf3856ad364e35_6.1.7600.21083_none_6c4edbbe61514573.manifest

File version

Not Applicable

File size

6,731

Date (UTC)

02-Nov-2011

Time (UTC)

21:38

Platform

Not Applicable

File name

X86_microsoft-windows-ndisuio_31bf3856ad364e35_6.1.7601.21853_none_6e55d24c5e5f2771.manifest

File version

Not Applicable

File size

6,731

Date (UTC)

02-Nov-2011

Time (UTC)

23:16

Platform

Not Applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_40d282093b8e01f98d18e37359dc586a_31bf3856ad364e35_6.1.7600.21083_none_cd80eba66e718ba6.manifest

File version

Not Applicable

File size

699

Date (UTC)

03-Nov-2011

Time (UTC)

16:58

Platform

Not Applicable

File name

Amd64_a6a03f9044a86305890536970921bfdd_31bf3856ad364e35_6.1.7601.21853_none_10be07632487bc51.manifest

File version

Not Applicable

File size

699

Date (UTC)

03-Nov-2011

Time (UTC)

16:58

Platform

Not Applicable

File name

Amd64_microsoft-windows-ndisuio_31bf3856ad364e35_6.1.7600.21083_none_c86d774219aeb6a9.manifest

File version

Not Applicable

File size

6,735

Date (UTC)

02-Nov-2011

Time (UTC)

22:27

Platform

Not Applicable

File name

Amd64_microsoft-windows-ndisuio_31bf3856ad364e35_6.1.7601.21853_none_ca746dd016bc98a7.manifest

File version

Not Applicable

File size

6,735

Date (UTC)

03-Nov-2011

Time (UTC)

01:07

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

2,516

Date (UTC)

03-Nov-2011

Time (UTC)

16:58

Platform

Not Applicable

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