Microsoft KB Archive/240210

= DLC Window Size Incrementer (uchMaxOutIncr) Does Not Operate Correctly =

Article ID: 240210

Article Last Modified on 2/28/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Datacenter Server

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This article was previously published under Q240210



SYMPTOMS
The DLC protocol uses a sliding window algorithm similar to that of TCP (Transmission Control Protocol). When programming a connection, you can specify an increment counter (uchMaxOutIncr) to "tell" the session how much to increase the window size after each successful send acknowledgment.

Assuming an Increment counter of 1, the actual session traffic should look like

S Ack S S Ack S S S S Ack S S S S S S S S Ack ... and so on.

where S is a sent packet, and Ack is an acknowledgment.

Note that each S packet is being acknowledged so the increment counter is increased by 1 with every successful send. Also, note that the actual behavior of this exchange is unpredictable.



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

Keywords: kbprb kbui KB240210

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