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Thread: Settings TCP Optimizer

  1. #1
    Junior Member
    Join Date
    Nov 2017

    Settings TCP Optimizer

    Hi Guys,

    i got a Problem with my Internet Upload Speed - i got VDSL 50 from Telekom Germany.

    At all Speedtest Sites, my Upload Speed is between 4-6 Mbit but it should be at 10 Mbit. The Router is Sync with more than 10.

    My Hardware isnt that bad and i got a very good cat7 Lan-Cable - i switched Cable and Hardware but it never changed a thing.

    I read a lot in the Forum about tweaking and i tried some tweaks out but i think it doesent helped me yet.

    Maybe you can figure out whats the problem i got. TCP Analyzer Results
    Tested on: 2017.11.08 20:57
    IP address:
    Client OS/browser: Windows 7 (Chrome 62.0.3202.89)

    TCP options string: 020405ac0103030801010402
    MSS: 1452
    MTU: 1492
    TCP Window: 66560 (not multiple of MSS)
    RWIN Scaling: 8 bits (2^8=256)
    Unscaled RWIN : 260
    Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
    BDP limit (200ms): 2662kbps (333KBytes/s)
    BDP limit (500ms): 1065kbps (133KBytes/s)
    MTU Discovery: ON
    TTL: 47
    Timestamps: OFF
    SACKs: ON
    IP ToS: 00000000 (0)

    At the very Moment my TCP Optimizer Settings are on pretty on default but i disabled Netdma coz i use chimney offload

    thanks for helping me

  2. #2
    Administrator Philip's Avatar
    Join Date
    May 1999
    Jacksonville, Florida, United States
    Blog Entries
    I would use the "optimal" settings in the TCP Optimizer. Other than that, it really depends how you measure speed. First, DSL overhead is about 20%. Then, online speed tests measure the speed between you and a particular server, it is dependent on physical distance, congestion on the line at the moment and a number of other external factors.

    If your modem/router syncs at 10MBps, at least the line between you and your ISP is getting that speed.

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