Microsoft KB Archive/823751

= FIX: Rapidly Switching Between Multicast Groups May Result in Joining an Unwanted Group =

Article ID: 823751

Article Last Modified on 5/27/2005

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APPLIES TO


 * Microsoft Windows CE .NET 4.1

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SYMPTOMS
When you use Internet Protocol (IP) Multicast, and while you try to switch between multicast groups, frames may be dropped, and other network related programs are slow to respond.



CAUSE
When you rapidly switch between multicast groups, Internet Group Management Protocol (IGMP) Join and IGMP Leave messages may interleave in such a way that the request to disconnect the previous group is ignored. The IGMP Join and Leave messages are sent to request membership for a new group and to remove membership from an old group.

When this behavior occurs, the network traffic is doubled.



Hotfix Information
A supported software update is now available from Microsoft as Windows CE Platform Builder 4.1 Core OS QFE 030711_KB823751. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Hotfix Replacement Information
This hotfix does not replace any other hotfixes.

File Information
The English version of this package has the file attributes (or later) that are listed in the following table.   Date         Time   Version            Size    File name ---    11-Jul-2003  21:20  4.1.3.711       1,612,392  Wincepb41-030711-kb823751-armv4.exe 11-Jul-2003 21:20  4.1.3.711       1,612,392  Wincepb41-030711-kb823751-armv4i.exe 11-Jul-2003 21:20  4.1.3.711       1,608,296  Wincepb41-030711-kb823751-armv4t.exe 11-Jul-2003 21:20  4.1.3.711       1,624,680  Wincepb41-030711-kb823751-mips16.exe 11-Jul-2003 21:20  4.1.3.711       1,657,448  Wincepb41-030711-kb823751-mipsii.exe 11-Jul-2003 21:21  4.1.3.711       1,657,448  Wincepb41-030711-kb823751-mipsii_fp.exe 11-Jul-2003 21:21  4.1.3.711       1,673,832  Wincepb41-030711-kb823751-mipsiv.exe 11-Jul-2003 21:21  4.1.3.711       1,673,832  Wincepb41-030711-kb823751-mipsiv_fp.exe 11-Jul-2003 21:19  4.1.3.711       1,559,144  Wincepb41-030711-kb823751-sh3.exe 11-Jul-2003 21:20  4.1.3.711       1,559,144  Wincepb41-030711-kb823751-sh4.exe 11-Jul-2003 21:19  4.1.3.711       1,460,840  Wincepb41-030711-kb823751-x86.exe 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.   Date         Time                        Size    File name --  Path: Public\Common\Oak\Lib\Armv4\Debug 08-Jul-2003 00:52                  1,758,914  Ip.lib 08-Jul-2003 00:52                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Armv4\Retail 08-Jul-2003 00:44                  1,237,322  Ip.lib 08-Jul-2003 00:44                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Armv4i\Debug 08-Jul-2003 00:37                  1,761,482  Ip.lib 08-Jul-2003 00:37                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Armv4i\Retail 08-Jul-2003 00:30                  1,239,652  Ip.lib 08-Jul-2003 00:30                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Armv4t\Debug 08-Jul-2003 00:23                  1,625,426  Ip.lib 08-Jul-2003 00:23                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Armv4t\Retail 08-Jul-2003 00:15                  1,223,458  Ip.lib 08-Jul-2003 00:15                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mips16\Debug 08-Jul-2003 01:21                  1,777,358  Ip.lib 08-Jul-2003 01:21                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mips16\Retail 08-Jul-2003 01:13                  1,140,436  Ip.lib 08-Jul-2003 01:13                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsii\Debug 08-Jul-2003 01:06                  1,777,358  Ip.lib 08-Jul-2003 01:06                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsii\Retail 08-Jul-2003 00:59                  1,252,308  Ip.lib 08-Jul-2003 00:59                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsii_fp\Debug 08-Jul-2003 01:35                  1,777,500  Ip.lib 08-Jul-2003 01:35                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsii_fp\Retail 08-Jul-2003 01:28                  1,252,548  Ip.lib 08-Jul-2003 01:28                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsiv\Debug 08-Jul-2003 02:33                  1,803,534  Ip.lib 08-Jul-2003 02:33                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsiv\Retail 08-Jul-2003 02:26                  1,265,054  Ip.lib 08-Jul-2003 02:26                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug 08-Jul-2003 02:04                  1,803,674  Ip.lib 08-Jul-2003 02:04                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail 08-Jul-2003 01:57                  1,265,300  Ip.lib 08-Jul-2003 01:57                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Sh3\Debug 08-Jul-2003 01:50                  1,508,858  Ip.lib 08-Jul-2003 01:50                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Sh3\Retail 08-Jul-2003 01:42                  1,104,400  Ip.lib 08-Jul-2003 01:42                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Sh4\Debug 08-Jul-2003 02:19                  1,508,262  Ip.lib 08-Jul-2003 02:19                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\Sh4\Retail 08-Jul-2003 02:11                  1,100,860  Ip.lib 08-Jul-2003 02:11                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\X86\Debug 08-Jul-2003 00:07                  1,459,190  Ip.lib 08-Jul-2003 00:07                    143,360  Ip.pdb

Path: Public\Common\Oak\Lib\X86\Retail 07-Jul-2003 23:57                  1,026,610  Ip.lib 07-Jul-2003 23:57                    143,360  Ip.pdb



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Keywords: kbbug kbfix kbqfe KB823751

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