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Thread: Need Help With Road Runner Internet Tweaks

  1. #1

    Need Help With Road Runner Internet Tweaks

    I just bought the
    Road Runner Extreme Package 8Mb x 768Kb

    Heres my TCP analyzer report

    « SpeedGuide.net TCP Analyzer Results »
    Tested on: 01.08.2007 19:59
    IP address: 76.170.xx.xxx

    TCP options string: 020405b40103030201010402
    MSS: 1460
    MTU: 1500
    TCP Window: 194180 (multiple of MSS)
    RWIN Scaling: 2
    Unscaled RWIN : 48545
    Reccomended RWINs: 64240, 128480, 256960, 513920
    BDP limit (200ms): 7767kbps (971KBytes/s)
    BDP limit (500ms): 3107kbps (388KBytes/s)
    MTU Discovery: ON
    TTL: 47
    Timestamps: OFF
    SACKs: ON
    IP ToS: 00000000 (0)
    ...........................................................................

    Heres my network diagnostic report:

    WEB100 Enabled Statistics:
    Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
    checking for firewalls . . . . . . . . . . . . . . . . . . . Done
    running 10s outbound test (client-to-server [C2S]) . . . . . 735.0kb/s
    running 10s inbound test (server-to-client [S2C]) . . . . . . 7.90Mb/s

    ------ Client System Details ------
    OS data: Name = Windows XP, Architecture = x86, Version = 5.1
    Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_10

    ------ Web100 Detailed Analysis ------
    Cable modem/DSL/T1 link found.
    Link set to Full Duplex mode
    No network congestion discovered.
    Good network cable(s) found
    Normal duplex operation found.

    Web100 reports the Round trip time = 125.52 msec; the Packet size = 1460 Bytes; and
    There were 28 packets retransmitted, 106 duplicate acks received, and 122 SACK blocks received
    The connection was idle 0 seconds (0%) of the time
    C2S throughput test: Packet queuing detected: 1.00%
    S2C throughput test: Packet queuing detected: 0.76%
    This connection is receiver limited 2.35% of the time.
    This connection is network limited 97.48% of the time.

    Web100 reports TCP negotiated the optional Performance Settings to:
    RFC 2018 Selective Acknowledgment: ON
    RFC 896 Nagle Algorithm: ON
    RFC 3168 Explicit Congestion Notification: OFF
    RFC 1323 Time Stamping: OFF
    RFC 1323 Window Scaling: ON

    Server 'nitro.ucsc.edu' is not behind a firewall. [Connection to the ephemeral port was successful]
    Client is probably behind a firewall. [Connection to the ephemeral port failed]
    Packet size is preserved End-to-End
    Server IP addresses are preserved End-to-End
    Information: Network Address Translation (NAT) box is modifying the Client's IP address
    Server says [76.170.76.240] but Client says [192.168.2.2]
    ........................................................................
    WEB100 Kernel Variables:
    Client: localhost/127.0.0.1
    CurMSS: 1460
    X_Rcvbuf: 103424
    X_Sndbuf: 103424
    AckPktsIn: 3468
    AckPktsOut: 0
    BytesRetrans: 40880
    CongAvoid: 3135
    CongestionOverCount: 0
    CongestionSignals: 1
    CountRTT: 3344
    CurCwnd: 151840
    CurRTO: 350
    CurRwinRcvd: 194180
    CurRwinSent: 16304
    CurSsthresh: 97820
    DSACKDups: 0
    DataBytesIn: 0
    DataBytesOut: 9930920
    DataPktsIn: 0
    DataPktsOut: 6802
    DupAcksIn: 106
    ECNEnabled: 0
    FastRetran: 1
    MaxCwnd: 195640
    MaxMSS: 1460
    MaxRTO: 360
    MaxRTT: 160
    MaxRwinRcvd: 194180
    MaxRwinSent: 16304
    MaxSsthresh: 97820
    MinMSS: 1460
    MinRTO: 220
    MinRTT: 20
    MinRwinRcvd: 48545
    MinRwinSent: 16304
    NagleEnabled: 1
    OtherReductions: 0
    PktsIn: 3468
    PktsOut: 6802
    PktsRetrans: 28
    RcvWinScale: 7
    SACKEnabled: 3
    SACKsRcvd: 122
    SendStall: 0
    SlowStart: 181
    SampleRTT: 150
    SmoothedRTT: 150
    SndWinScale: 2
    SndLimTimeRwin: 235891
    SndLimTimeCwnd: 9765284
    SndLimTimeSender: 16919
    SndLimTransRwin: 1
    SndLimTransCwnd: 2
    SndLimTransSender: 1
    SndLimBytesRwin: 80300
    SndLimBytesCwnd: 9850620
    SndLimBytesSender: 0
    SubsequentTimeouts: 0
    SumRTT: 419750
    Timeouts: 0
    TimestampsEnabled: 0
    WinScaleRcvd: 2
    WinScaleSent: 7
    DupAcksOut: 0
    StartTimeUsec: 710577
    Duration: 10017074
    c2sData: 2
    c2sAck: 2
    s2cData: 9
    s2cAck: 3
    half_duplex: 0
    link: 0
    congestion: 0
    bad_cable: 0
    mismatch: 0
    spd: 7.93
    bw: 7.32
    loss: 0.000147016
    avgrtt: 125.52
    waitsec: 0.00
    timesec: 10.00
    order: 0.0306
    rwintime: 0.0235
    sendtime: 0.0017
    cwndtime: 0.9748
    rwin: 1.4815
    swin: 0.7891
    cwin: 1.4926
    rttsec: 0.125523
    Sndbuf: 103424
    aspd: 0.00000
    CWND-Limited: 969.43

    The theoretical network limit is 7.32 Mbps
    The NDT server has a 50.0 KByte buffer which limits the throughput to 6.28 Mbps
    Your PC/Workstation has a 189.0 KByte buffer which limits the throughput to 11.80 Mbps
    The network based flow control limits the throughput to 11.89 Mbps

    Client Data reports link is 'T1', Client Acks report link is 'T1'
    Server Data reports link is '10 Gig', Server Acks report link is 'Ethernet'

    ...................................................

    The theoretical network limit appears to be low at only 7.32Mbps. And the NDT server limits the throughput to 6.28Mbps. Should I try to change this n how? It also says that the bandwidth is limited by the client at 2.5 percent!

    Additionally should i change my connections per server to 50 instead of 10 through xp-antispy for better p2p transfer rates.

    I would like to squeeze every bit of bandwidth for every penny i spend.

    Thx for any help.

  2. #2
    Elite Member trogers's Avatar
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    Quote Originally Posted by quantumnanotec View Post
    The theoretical network limit is 7.32 Mbps
    The NDT server has a 50.0 KByte buffer which limits the throughput to 6.28 Mbps
    Your PC/Workstation has a 189.0 KByte buffer which limits the throughput to 11.80 Mbps
    The network based flow control limits the throughput to 11.89 Mbps


    The theoretical network limit appears to be low at only 7.32Mbps. And the NDT server limits the throughput to 6.28Mbps. Should I try to change this n how? It also says that the bandwidth is limited by the client at 2.5 percent!

    Additionally should i change my connections per server to 50 instead of 10 through xp-antispy for better p2p transfer rates.
    The important points are your comp's throughput limit and the network's throughput limit.

    Throughput limit is based on bandwidth and latency. This test shows both limits are above 8 mbps and thus your setting and connection are fine. This is shown by your speedtest result of 7.9 mbps.

    No, the 2 connections per server (10 and 20) are only for setting IE and not for P2P.

    For P2P, you want to increase the number of half-opened concurrent connections only if your OS is XP SP2. The patch for this is available at:

    http://www.lvllord.de/?lang=en&url=downloads

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