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QuestionTcp1323Opts and Windows XP

  • Wednesday, September 23, 2009 5:26 PMkzsolt2 Users MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    Theorethically Tcp1323Opts (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters) bit 1 control the usage of Timestamp at TCP protocol.
    At practice (network trace, XP Pro) does not matter this bit 1 or 0 MS TCP not send any timestamp (even if MS initiate the connection).
    At real life if the transmission error free this does not make sense. But if some error occured then the interworking with non MS operating system (in our case solaris) is fill with trouble:

    1. The packet (ack) is less than 64 octett, padding required. At complicated network this make more trouble.
    2. Without timestamp the partner TCP cannot calculate the delay. The result is slow retransmit or sometimes dead end of connection.  

    So anybody can have TCP timestamp of XP?

     

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