Microsoft KB Archive/314121

= MMS and RTSP UDP Packets on the Secondary Channel Are Dropped =

Article ID: 314121

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2000 Standard Edition

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This article was previously published under Q314121



SYMPTOMS
When Internet Security and Acceleration (ISA) Server receives streaming packets that are larger than 4 kilobytes (KB), ISA Server may drop them, and this may degrade performance.



CAUSE
This problem can occur because ISA Server can only process 4 KB or smaller streaming media packets.



RESOLUTION
To resolve this problem, obtain and install the latest service pack for ISA Server 2000. For additional information about how to obtain and install the latest service pack for ISA Server 2000, click the article number below to view the article in the Microsoft Knowledge Base:

313139 How to Obtain the Latest Internet Security and Acceleration Server 2000 Service Pack



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



MORE INFORMATION
After you apply ISA Server Service Pack 1 (SP1), ISA Server can process streaming media packets that have a size of up to 8 KB. Although it is rare for streaming media packets to exceed 8 KB, the streaming media protocols allow for much larger packet sizes.

Keywords: kbenv kbnetwork kbprb KB314121

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