Microsoft KB Archive/136032

= Systems Management Server Sender Packet Size Computation =

Article ID: 136032

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Systems Management Server 1.0 Standard Edition
 * Microsoft Systems Management Server 1.1 Standard Edition

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This article was previously published under Q136032





SYMPTOMS
The Sender is designed to dynamically compute a packet size based on link speed when sending packages. It begins with a 1024 byte packet and records the time to transmit. Based on this time, the sender increases or decreases the packet size as necessary within the range of 1024 to 262144 bytes.

However, there is a range of speeds where the Sender does not adjust packet size correctly, forcing the maximum packet size on a link that is too slow.



CAUSE
The Sender incorrectly computes the packet size. NOTE: In many WAN environments 56k bit to 256k bit links are common. Some WANs have links below 38k bits per second, such as when using modems for a RAS Sender address.

The following table lists link speed and the corresponding packet size:   Link Speed   Byte Buffer (bits/sec)  Packet Size --  ---   262144       262144   6552         245700   6112         229200   5672         212700   5232         196200   4792         179700   4352         163200   3912         146700   3472         130200   3032         113700   2592         97200   2152         80700   1712         64200   1272         47700   832          31200   424          15900   216          8100   104          3900   48           1800



STATUS
Microsoft has confirmed this to be a problem in Systems Management Server versions 1.0 and 1.1. This problem has been corrected in Systems Management Server version 1.2.

Additional query words: prodsms sms

Keywords: kbnetwork kbsmssender KB136032

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