June 23, 200422 yr SP2 RC2 has newer network code and Dr. TCP no longer lets me properly adjust my RWIN.The one it displays is not the one being used (tested at www.dslreports.com)Other programs, like iSpeed, can't properly set my RWIN to anything either.So, how do I change my RWIN with WinXP Pro SP2 RC2? I just want it to be 63536.Can't get it to that point...If nobody can answer, then please tell me the official MS NewsGroup address for SP2 help/testing stuff. Thanks!
June 23, 200422 yr SP2 RC2 has newer network code and Dr. TCP no longer lets me properly adjust my RWIN.I've run into something similar. I have 2 nics on my system. Dr. TCP will come up and allow me to change both NICs, but the settings will not stick. My MTU will default to 1492.
June 23, 200422 yr Author I got it...SP2 RC2 automatically multiplies RWIN times 44 no matter what you do.Thats the way it SHOULD BE, but not for me because my special ISP modem has a feature that lowers your MTU by 8 automatically no matter what you set it to.Thus, MTU of 1500 will acctually be 1492, BUT WinXP SP2 RC2 does not take that in consideration (it can't, since the modem is on the hardware level), and sets my RWIN 44x1460 (RWIN = MSSx44, where MSS is 40 lower than your MTU) instead of 44x1452 which slows down my connection...by a little bit!Shoot...
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