The values that are returned in the TotalBytesFiltered and TotalBytesCaptured fields are much smaller than expected when a program calls the IStats::GetTotalStatistics method in Windows Server 2003

View products that this article applies to.

Symptoms

Consider the following scenario. On a Microsoft Windows Server 2003-based computer, you run a program that uses Network Monitor APIs to capture the network throughput of a TCP/IP session. When the program calls the IStats::GetTotalStatistics method to obtain the statistics of the current network throughput capture, the values that are returned in the TotalBytesFiltered and TotalBytesCaptured fields are much smaller than expected. The returned values are much smaller than the actual bytes that are filtered and captured when the program filters an IP address pair.

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Resolution

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

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 this specific problem. 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

No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix 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 tool in Control Panel.

Windows Server 2003, Itanium-based Systems

   Date         Time   Version            Size    File name     Platform
   ------------------------------------------------------------------------
   22-Jun-2005  03:29  5.2.3790.354       97,792  Ndisnpp.dll   IA-64
   22-Jun-2005  03:29  5.2.3790.354    1,509,376  Netmon.exe    IA-64
   22-Jun-2005  03:29  5.2.3790.2471     107,008  Ndisnpp.dll   IA-64
   22-Jun-2005  03:29  5.2.3790.2471   1,582,080  Netmon.exe    IA-64
   22-Jun-2005  03:29  6.1.22.4          639,712  Updspapi.dll  IA-64

Windows Server 2003, x64-based versions

   Date         Time   Version            Size    File name  
   ------------------------------------------------------------
   22-Jun-2005  03:29  5.2.3790.2471      50,176  Ndisnpp.dll      
   22-Jun-2005  03:29  5.2.3790.2471     920,576  Netmon.exe       
   22-Jun-2005  03:29  6.1.22.4          462,560  Updspapi.dll

Windows Server 2003, 32-bit versions

   Date         Time   Version            Size    File name  
   ------------------------------------------------------------
   22-Jun-2005  15:08  5.2.3790.354       31,744  Ndisnpp.dll      
   22-Jun-2005  00:18  5.2.3790.354      628,224  Netmon.exe       
   22-Jun-2005  15:29  5.2.3790.2471      33,280  Ndisnpp.dll      
   22-Jun-2005  02:19  5.2.3790.2471     647,680  Netmon.exe       
   25-Feb-2005  03:51  6.1.22.4          371,936  Updspapi.dll

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This problem was first corrected in Windows Server 2003 Service Pack 2.

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More information

The IStats interface is part of the Network Monitor APIs. This interface provides the methods that you use to do the following tasks:

Connect a Network Packet Provider (NPP) to the network
Capture network traffic
Retrieve statistics
Disconnect the NPP from the network

The IStats interface generates statistics without frames.

The IStats::GetTotalStatistics method is an IStats interface that retrieves the total statistics for the current network throughput capture. The IStats::GetTotalStatistics method has an OUT pointer to a STATISTICS structure that provides the total statistics. TotalBytesFiltered and TotalBytesCaptured are fields of this STATISTICS structure.

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

Technical support for Windows x64 editions

Your hardware manufacturer provides technical support and assistance for Microsoft Windows x64 editions. Your hardware manufacturer provides support because a Windows x64 edition was included with your hardware. Your hardware manufacturer might have customized the Windows x64 edition installation with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your Windows x64 edition. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site:

http://www.microsoft.com/windowsxp/64bit/default.mspx

For product information about Microsoft Windows Server 2003 x64 editions, visit the following Microsoft Web site:

http://www.microsoft.com/windowsserver2003/64bit/x64/editions.mspx

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