Microsoft KB Archive/922120

= Network Map in Windows Vista does not display computers that are running Windows XP =

Article ID: 922120

Article Last Modified on 8/23/2007

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APPLIES TO


 * Microsoft Windows XP Professional
 * Microsoft Windows XP Home Edition

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SYMPTOMS
When you run Network Map on a Windows Vista-based computer, computers that are running Microsoft Windows XP do not appear on the network diagram.



CAUSE
This problem occurs if the Link-Layer Topology Discovery (LLTD) Responder component is not installed on the Windows XP-based computer.

Network Map in Windows Vista makes network diagrams of the connections between network devices that can be used to troubleshoot connectivity problems. Network Map uses a discovery protocol called Link-Layer Topology Discovery (LLTD) that queries other devices on the network to determine how the network is organized.

Windows Vista includes the software components that implement the LLTD protocol. For other devices on the network to be displayed on the map, they must enable a discovery protocol that can respond to the mapping requests from the Windows Vista-based computer.



Update information
To resolve this problem, install the update that is described in this section. The update installs the LLTD Responder component on Windows XP-based computers. The following file is available for download from the Microsoft download center:

Download the Windows XP package now.

Release Date: November 21, 2006

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites
To apply this update, you must have Windows XP Service Pack 2 (SP2) installed on the computer.

Restart requirement
You must restart the computer after you apply this update.

Update replacement information
This update does not replace any other updates.

File information
The English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, 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

Keywords: atdownload kbwinxppresp3fix kbbug kbfix kbhotfixserver kbqfe kbpubtypekc KB922120

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