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Thread: Guidance Please

  1. #1
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    Guidance Please

    Does anybody have any suggestions out there on what improvements I can make?

    Thanks in advance

    --Jake

    TCP properties for IP = XX.XX.XX.XX

    TCP options string = 020405b401010402

    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) = 65535
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled Receive Window = 65535
    Note: Under Windows 9x, if you have RWIN set to any other value, and the Analyzer reports 65535 you might need to install the MS Vtcp386 fix.
    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: 2621.4 kbps (327.675 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 1048.56 kbps (131.07 KBytes/s) @ 500ms

    MTU Discovery (RFC1191) = ON

    Time to live left = 48 hops
    TTL value is ok.

    Timestamps (RFC1323) = OFF

    Selective Acknowledgements (RFC2018) = ON

    IP type of service field (RFC1349)= 00000000
    Lenovo Thinkpad T61, Intel Centrino Pro Duo Core T7300 2.00 ghz, Vista Business SP1, 4g Ram, 80g HD

  2. #2
    Dr Tweak mnosteele52's Avatar
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    Who is your ISP and what are your caps? What kind of speeds are you getting with your current settings?

  3. #3
    Elite Member Lobo's Avatar
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    Download SG Optimizer to desktop, directions in help thread below in signature.

  4. #4
    Elite Member Lobo's Avatar
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    Er ah, Mr. Steele, RWIN 65535 ring any bells

  5. #5
    Regular Member BigAmp's Avatar
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    us th e SG optimizer to try some different RWIN values.
    TweakXP.com RASPPPoE TCP/IP Analyzer TCP Optimizer RWIN Calculator
    Centrino 1.50 GHz | 768 MB RAM | XP Pro.

  6. #6
    Dr Tweak mnosteele52's Avatar
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    Yep one of two things, but just wondering what speeds with that size RWIN.

  7. #7
    Elite Member Lobo's Avatar
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    65535 is not a RWIN and is not a mutiple, hello

  8. #8

  9. #9
    Member
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    Adelphia

    I'm with Adelphia, cable internet is new in my area here in Maine (just got indoor plumbing a couple of years ago! )

    The settings I posted is what I had after I ran the optimizer. It just seems like I get really sketchy and irregular speeds. The best download speed I usually get is around 200k ... sometimes much faster (hi 3's) other times, wicked slow. Not sure why.

    --Jake
    Lenovo Thinkpad T61, Intel Centrino Pro Duo Core T7300 2.00 ghz, Vista Business SP1, 4g Ram, 80g HD

  10. #10
    Elite Member Lobo's Avatar
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    Download this patch and install off main page this site, broadband patches, REBOOT

  11. #11
    Dr Tweak mnosteele52's Avatar
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    You need this patch, download and install it. First open the Optimizer and try a lower RWIN and see how it goes, select cable modem - custom settings - tcp receive window 51100 - uncheck both boxes under tcp 1323 opts, modify all adapters and save and reboot. Then do a speed test in my sig and post the results.

  12. #12
    Member
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    mno

    Here are the results of your linked speed test.

    TCP/Web100 bandwidth test v4.4
    click START to begin
    running 10s outbound test... 109 Kbs outbound
    running 10s inbound test... 2349 Kbs inbound

    web100 Connection Variables:

    Round Trip times were sampled 2000 times
    for a total time of 405510 millisecs
    giving an average RTT of: 202.0 millisecs(0.202 secs)
    You received 2044 packets
    of size 1460 from the remote host
    and it took a total of 10210.0 millisecs
    Maximum Expected Bandwidth: 2595 Kbs
    Good Data Stream--No retransmits!
    You are advertising a window of 65535 bytes
    The remote host is advertising a window of 5840 bytes
    The Remote Host has a send buffer of 128000 bytes
    and a receive buffer of 128000 bytes
    Buffer sizes are very important in determining the
    advertised window sizes. Larger window sizes can
    help increase thruput. If your window is smaller
    than the remote host, your should investigate
    increasing your socket buffer sizes.

    web100 reports Tweakable Settings as:
    RFC 2018 Selective Acknowledgment: ON
    RFC 1323 Time Stamping: OFF
    RFC 1323 Window Scaling: OFF

    click START to re-test
    Lenovo Thinkpad T61, Intel Centrino Pro Duo Core T7300 2.00 ghz, Vista Business SP1, 4g Ram, 80g HD

  13. #13
    Elite Member Lobo's Avatar
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    Download this patch and install off main page this site, broadband patches, REBOOT





    MS Vtcp.386 fix for Windows 98
    Sorry I forgot patch before

  14. #14
    Member
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    After the Patch

    This is what I got after installing the patch:

    TCP/Web100 bandwidth test v4.4
    click START to begin
    running 10s outbound test... 103 Kbs outbound
    running 10s inbound test... 2276 Kbs inbound

    web100 Connection Variables:

    Round Trip times were sampled 1950 times
    for a total time of 543400 millisecs
    giving an average RTT of: 278.0 millisecs(0.278 secs)
    You received 2004 packets
    of size 1460 from the remote host
    and it took a total of 10220.0 millisecs
    Maximum Expected Bandwidth: 3683 Kbs
    Good Data Stream--No retransmits!
    You are advertising a window of 256960 bytes
    The remote host is advertising a window of 5840 bytes
    The Remote Host has a send buffer of 128000 bytes
    and a receive buffer of 128000 bytes
    Buffer sizes are very important in determining the
    advertised window sizes. Larger window sizes can
    help increase thruput. If your window is smaller
    than the remote host, your should investigate
    increasing your socket buffer sizes.

    web100 reports Tweakable Settings as:
    RFC 2018 Selective Acknowledgment: ON
    RFC 1323 Time Stamping: OFF
    RFC 1323 Window Scaling: ON

    click START to re-test

    Looks to me like it was faster before the patch.

    --Jake
    Lenovo Thinkpad T61, Intel Centrino Pro Duo Core T7300 2.00 ghz, Vista Business SP1, 4g Ram, 80g HD

  15. #15
    Elite Member Lobo's Avatar
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    Ok, it's fixed:



    In Optimizer select connection type at top, select adapter, select custom settings, enter 1 at a time 51100 or 64240, uncheck scaling under Tcp1323Opts, apply changes and REBOOT each time you change number in Optimizer, the following numbers scaling IS checked, try besides the ones thats in now: 513920, 522680, 524176





    Speed test here, test will open another browser, close one
    directions on how to do speed test in help thread in signature: Select site nearest you:



    http://www.speakeasy.net/main.php?page=sup_pops


    If from overseas try nearest site from here: http://www.testmyspeed.com/internationalspeedtests.htm

    Directions on what to do prior to speed test on help thread below, turn off all running programs.


    Larger RWIN does not always mean faster

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