Router does not update its ARP table after an IP address fails over to a cluster node in Windows Server 2008 R2

Symptoms

Assume that you configure a Windows Server 2008 R2-based failover cluster. An IP address fails over from one cluster node to another cluster node. In this situation, router does not update its Address Resolution Protocol (ARP) table. Therefore, remote client computers cannot reach the cluster node that has the IP address. 

Cause

This issue occurs because Windows does not send a gratuitous ARP packet when a new IP address is assigned on the computer.

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 website:

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, you must be running Windows Server 2008 R2 Service Pack 1 (SP1).

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:

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

Registry information

To apply this hotfix, 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.

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 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, 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

    Milestone

    Service branch

    6.1.760
    1.17xxx

    Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.22xxx

    Windows Server 2008 R2

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • 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 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 x64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.17939

376,688

22-Aug-2012

18:12

x64

Netio.sys

6.1.7601.22296

376,680

10-Apr-2013

05:24

x64

Fwpkclnt.sys

6.1.7601.18042

288,088

03-Jan-2013

06:00

x64

Tcpip.sys

6.1.7601.18126

1,911,144

10-Apr-2013

06:02

x64

Fwpkclnt.sys

6.1.7601.22296

288,104

10-Apr-2013

05:24

x64

Tcpip.sys

6.1.7601.22296

1,900,904

10-Apr-2013

05:24

x64

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.17939

711,024

22-Aug-2012

16:51

IA-64

Netio.sys

6.1.7601.22296

711,016

10-Apr-2013

04:30

IA-64

Fwpkclnt.sys

6.1.7601.18042

482,152

03-Jan-2013

04:45

IA-64

Tcpip.sys

6.1.7601.18126

3,796,840

10-Apr-2013

04:51

IA-64

Fwpkclnt.sys

6.1.7601.22296

482,152

10-Apr-2013

04:30

IA-64

Tcpip.sys

6.1.7601.22296

3,821,928

10-Apr-2013

04:30

IA-64


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:

824684Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Server 2008 R2

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

File name

Amd64_0db74432ae1be47ee8b1554f90a48e69_31bf3856ad364e35_6.1.7601.22296_none_231c29997e29d12d.manifest

File version

Not applicable

File size

1,414

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Amd64_150591489a8070cd49f01e548b7e5c3a_31bf3856ad364e35_6.1.7601.22296_none_d13e5a186dfea706.manifest

File version

Not applicable

File size

1,060

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Amd64_4a5382b2ea53207d271c6501953e9e45_31bf3856ad364e35_6.1.7601.22296_none_53d269516f46e3c9.manifest

File version

Not applicable

File size

712

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Amd64_9471eb80b8f59e1e23db3de376a44d22_31bf3856ad364e35_6.1.7601.17939_none_c7bcd68165e65e7e.manifest

File version

Not applicable

File size

1,414

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Amd64_e07938dd31ef92f61ff9f640ea35b1d5_31bf3856ad364e35_6.1.7601.17939_none_3ed39ebe62076fed.manifest

File version

Not applicable

File size

1,060

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Amd64_f0ed83bda0697abd97fd471015aed5c2_31bf3856ad364e35_6.1.7601.17939_none_f48525cb7b29d619.manifest

File version

Not applicable

File size

712

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_b4b0db76cbf8bcd1.manifest

File version

Not applicable

File size

2,542

Date (UTC)

22-Aug-2012

Time (UTC)

18:33

Platform

Not applicable

File name

Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22296_none_b4f671e3e549e8a5.manifest

File version

Not applicable

File size

2,542

Date (UTC)

10-Apr-2013

Time (UTC)

05:48

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18126_none_113b2a097d0c3edb.manifest

File version

Not applicable

File size

3,784

Date (UTC)

12-Apr-2013

Time (UTC)

16:26

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22296_none_117917609662a23c.manifest

File version

Not applicable

File size

3,838

Date (UTC)

10-Apr-2013

Time (UTC)

05:51

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_bf0585c900597ecc.manifest

File version

Not applicable

File size

1,166

Date (UTC)

22-Aug-2012

Time (UTC)

17:23

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22296_none_bf4b1c3619aaaaa0.manifest

File version

Not applicable

File size

1,166

Date (UTC)

10-Apr-2013

Time (UTC)

05:28

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_2243ff968dbbc35af73faf89e5e3fa0d_31bf3856ad364e35_6.1.7601.17939_none_43d198d25633f10c.manifest

File version

Not applicable

File size

1,411

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Ia64_ca2de83fd5e1cda933a94e5842fd77df_31bf3856ad364e35_6.1.7601.22296_none_31d60d6adfb7d3db.manifest

File version

Not applicable

File size

1,411

Date (UTC)

12-Apr-2013

Time (UTC)

16:20

Platform

Not applicable

File name

Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_5893e3e913995497.manifest

File version

Not applicable

File size

2,541

Date (UTC)

22-Aug-2012

Time (UTC)

18:25

Platform

Not applicable

File name

Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22296_none_58d97a562cea806b.manifest

File version

Not applicable

File size

2,541

Date (UTC)

10-Apr-2013

Time (UTC)

05:31

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18126_none_b51e327bc4acd6a1.manifest

File version

Not applicable

File size

3,782

Date (UTC)

12-Apr-2013

Time (UTC)

16:21

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22296_none_b55c1fd2de033a02.manifest

File version

Not applicable

File size

3,836

Date (UTC)

10-Apr-2013

Time (UTC)

05:33

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_bf0585c900597ecc.manifest

File version

Not applicable

File size

1,166

Date (UTC)

22-Aug-2012

Time (UTC)

17:23

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22296_none_bf4b1c3619aaaaa0.manifest

File version

Not applicable

File size

1,166

Date (UTC)

10-Apr-2013

Time (UTC)

05:28

Platform

Not applicable


Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.

×