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Thread: Win 2K Analysis.

  1. #1
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    Win 2K Analysis.

    TCP options string = 020405b40103030701010402

    MTU = 1500
    MTU is fully optimized for broadband.

    MSS = 1460
    Maximum useful data in each packet = 1460, which is equal to MSS.

    Default Receive Window (RWIN) = 5323008
    RWIN Scaling (RFC1323) = 7 bits
    Unscaled Receive Window = 41586
    For optimum performance, consider changing RWIN to a multiple of MSS.
    Other values for RWIN that might work well with your current MTU/MSS:
    513920 (MSS x 44 * scale factor of 8)
    256960 (MSS x 44 * scale factor of 4)
    128480 (MSS x 44 * scale factor of 2)
    64240 (MSS x 44)

    bandwidth * delay product:
    Your RcvWindow limits you to: 212920.32 kbps (26615.04 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 85168.128 kbps (10646.016 KBytes/s) @ 500ms

    MTU Discovery (RFC1191) = ON

    Time to live left = 88 hops
    TTL value is ok.

    Timestamps (RFC1323) = OFF

    Selective Acknowledgements (RFC2018) = ON

    IP type of service field (RFC1349)= 00000000

    **************************
    -Win2k Pro
    -AMD 1.1 Ghz
    -512 RAM
    -32 GeForce2


    This look about right? I am a still a little green on the whole RWIN value thing. I went to the TCP window size and changed it the highiest recommendation (513920 ), but what about the part where it talks about "(MSS x 44 * scale factor of 8)"? Where do I change this? Or is this automatic?

    My second question is does my high RWIN value really effect performance? Should I lower it? Is there a general number everyone uses?

    Sorry for many questions it just seems a lot of these things can be answered here.

  2. #2
    Elite Member Lobo's Avatar
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    Scale factor is automattic, what is your OS and system specs

  3. #3
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    My system specs

    -Win2k Pro
    -AMD 1.1 Ghz
    -512 RAM
    -32mb GeForce2

  4. #4
    Elite Member Lobo's Avatar
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    Do you have Cablenuts adjuster

  5. #5
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    Hrmm...no, but I have heard of it. Where do I get it.

  6. #6
    Elite Member Lobo's Avatar
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    Click on help page below in signature and follow directions exactly, please leave your OS and system specs if you have not done so.Also if you have Cablenuts adjuster installed I need to know that. On 2nd page of help page at bottom are some Tips and how to do speed test. Thank you and good luck.

    You will have to re-run SG's patches as Cablenut removes them but well woth it, when your done I will recommend some RWIN's

  7. #7
    Elite Member Lobo's Avatar
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    Bring up Cablenuts adjuster inside Cablenut on desktop the numbers below go in 3 places in W2k and XP, they are: DefaultReceiveWindow, TcpWindowSize, GlobalMaxTcpWindowSize, take out number that is in there and put in one of these, 1 at a time, try: 64240, 524176, 531440 or 544800




    At bottom click save to registry, and REBOOT or it will not work. On help page below in signature, 2nd page, at bottom are Tips
    Good luck

    How do do speed test
    1. The best time is early in the morning (3 AM - 6 AM)
    2. Make sure defrag has been run so no files are fragmented
    3. Delete Temp internet files, not while testing, but after each test. IE browser, click tools, internet options, click on delete files and no this will not harm system, just get rid of temp files
    4. Go to a fast server such as www.happypuppy.com and click on 10 demos, select a LARGE file to download (not all of it , just most of it, before you click cancel) this will show you how fast you are downloading, it's not going to be quick except except early in morning when not many people on net. I recommend you go to www.analogX.com and download Net State live, run this while downloading as it will give you avg of your download speed, really all you need on Net Stat is incoming data, incoming totals and Local machine, right click on Net Stat anywhere, stactics and check these 3 items, the rest need not be checked unless you want them, all you care about is average. Another fast download site is ftp.lucasarts.com
    Put system defrag in scheduled tasks to run everyday.
    5. Probably the most important, nothing can be running during test, no firewalls, no virus stuff, no ICQ, no AIM (some of you may have to go into BIOS to disable virus scanner, nothing running except Net Stat live
    Scheduled tasks will run disk defrag, 98 & SE in Taskbar, WIN ME in control panel
    The people who want speed surfing or doing whatever must close all other programs.
    (NOTE: at present time www.AOL.com seems to be fastest download site, at bottom download aol 6.0)
    Or if you wish you may go to www.testmyspeed.com and do one of the online tests, these vary to much for me but you may like them.







  8. #8
    bandwidth * delay product:
    Your RcvWindow limits you to: 212920.32 kbps (26615.04 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 85168.128 kbps (10646.016 KBytes/s) @ 500ms

    Isn't that look a lil bit too high, almost unbelievable, haven't seen one like his

    " The ______ loss will be higher, the higher RWIN value u set it"

    A lot of people use 64240 (no scientific proof, I heard it from everyone else)

    Don't believe what I say, just do what they tell u

    Good Luck
    http://whatis.techtarget.com/definitionsAlpha/
    http://nyc.speakeasy.net
    866 MHz PIII, 128 Mb RAM, 40+40 Gs, Windows ME, RR cable

  9. #9
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    So....

    LOBO wrote-

    "Bring up Cablenuts adjuster inside Cablenut on desktop the numbers below go in 3 places in W2k and XP, they are: DefaultReceiveWindow, TcpWindowSize, GlobalMaxTcpWindowSize, take out number that is in there and put in one of these, 1 at a time, try: 64240, 524176, 531440 or 544800"


    Ok I downloaded cablenuts software and put "64240" into all three of those fields. Now you mentioned I needed to download the SG patches again, so I downloaded the generic Win2kpro patch and restarted. Now my question is do I need to re-do my reg tweaks as well?

    When I go into my reg under "GlobalMaxTcpWindowSize" I was expecting to see "6420" but instead I see "3ebc0".


    Thanks for all the help Lobo!

  10. #10
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    This is after using cablenuts software. Is this better? Are lower hops better for online gaming?





    TCP options string = 020405b40103030201010402

    MTU = 1500
    MTU is fully optimized for broadband.

    MSS = 1460
    Maximum useful data in each packet = 1460, which is equal to MSS.

    Default Receive Window (RWIN) = 256960
    RWIN Scaling (RFC1323) = 2 bits
    Unscaled Receive Window = 64240
    RWIN is a multiple of MSS
    Other values for RWIN that might work well with your current MTU/MSS:
    513920 (MSS x 44 * scale factor of 8)
    128480 (MSS x 44 * scale factor of 2)
    64240 (MSS x 44)

    bandwidth * delay product:
    Your RcvWindow limits you to: 10278.4 kbps (1284.8 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 4111.36 kbps (513.92 KBytes/s) @ 500ms

    MTU Discovery (RFC1191) = ON

    Time to live left = 39 hops
    TTL value is ok.

    Timestamps (RFC1323) = OFF

    Selective Acknowledgements (RFC2018) = ON

    IP type of service field (RFC1349)= 00000000

  11. #11
    Elite Member Lobo's Avatar
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    I don't know anything about gaming, we have online gaming forum for that Sir, you test out all those RWIN's using speed test above and select the one that is fastest

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