Microsoft KB Archive/824838

= Large UDP broadcast packets may not be received in Windows XP or in Windows Server 2003 =

Article ID: 824838

Article Last Modified on 8/29/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows XP Professional for Itanium-based systems
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional for Itanium-based systems

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SYMPTOMS
When a program sends a large User Datagram Protocol (UDP) broadcast packet, the packet may not be received.



CAUSE
When you send a UDP broadcast packet that must be fragmented, the IP checksum value may be calculated incorrectly. The computer that receives the UDP broadcast packet may identify the UDP broadcast packet as corrupted and discard the UDP broadcast packet. A UDP broadcast packet is fragmented when the UDP broadcast packet is larger than 1,500 bytes on an Ethernet II network. This problem originates on the Windows XP-based computer or on the Windows Server 2003-based computer that sends the packet.



Windows XP Service Pack 1 and Service Pack 2
A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

The English version of this hotfix has the file attributes (or later) 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.

Prerequisites
You must have Windows XP Service Pack 1 (SP1) or Service Pack 2 (SP2) installed.

Restart requirement
You must restart your computer after you install this hotfix

Update replacement information
This hotfix does not replace any other hotfixes

Windows XP 32-bit versions, SP1
Date         Time   Version        Size     File name -- 18-Jul-2003  12:38  5.1.2600.1250  318,720  Tcpip.sys

Windows XP 64-bit versions, SP1
Date        Time   Version        Size       File name

18-Jul-2003 12:38  5.1.2600.1250  1,092,992  Tcpip.sys

Windows XP 32-bit versions, SP2
Date        Time   Version            Size    File name -- 19-Aug-2004 07:00  5.1.2600.2507     359,040  Tcpip.sys

Windows Server 2003
A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

The English version of this hotfix has the file attributes (or later) 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.

Prerequisites
No prerequisites are required.

Restart Requirement
You must restart your computer after you install this hotfix

Update replacement information
This hotfix does not replace any other hotfixes

File information
Date        Time   Version           Size    File name

14-May-2004 18:26  5.2.3790.172   334,336    Tcpip.sys



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



MORE INFORMATION
For additional 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: kbhotfixserver kbqfe kbwinxpsp2fix kbqfe kbwinxppresp2fix kbfix kbbug kbprb KB824838

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