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    rwin value

    This is a discussion on rwin value within the Sky Broadband help forums, part of the Sky Broadband help and support category; I have a 16mbps connection. Dslreports tweak tester recommends an rwin value between 150,380 and 400,040 SG TCP Optimiser sets ...

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      rwin value

      I have a 16mbps connection.
      Dslreports tweak tester recommends an rwin value between 150,380 and 400,040
      SG TCP Optimiser sets the rwin value to 1,027,840

      Why is there such a large difference?


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      Re: rwin value

      I have read somewhere else:

      " RWIN should be large enough to sustain continuous data transfer. By default, this window is too small (8760 for Windows 95/98/98SE/NT and 17520 for Windows ME/2000/XP) for many types of DSL and Cable (Broadband).

      Raising RWIN creates a larger window, which allows more information to come through non-stop, up to a point. After this point, no difference will be noticed for the particular connection. For each user, this point can/will vary and is determined by (bandwidth * delay) product.

      Please note that there is no single value for all hosts on the Internet. You have to allocate some reasonable extra RWIN (say 20-25%) for variance from average latency "

      Does having too large an rwin value have any detrimental effect on the connection?

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      Re: rwin value

      Quote Originally Posted by castro View Post
      Does having too large an rwin value have any detrimental effect on the connection?
      Yes it can. If it is too large then more data is required to fill the buffer before missing data is identified and a resend request sent. This would effectively decrease your download speed. Better too big than too small though.

     

     

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