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Thread: speed loss

  1. #1
    TyranT
    Guest

    speed loss

    after being on the internet for several minutes my machine slows down significantly. My dsl provider tells me that they can't help because its not their problem. I need to fix somthing on my computer and its not for them to help me do.

    I go from 720 kbs to maybe 50kbs with in 10 mins tops. Any help will be apreciated.

  2. #2
    Dr Tweak mnosteele52's Avatar
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    Location
    Chesapeake, VA
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    Welcome to Speedguide, please read here so that we can properly help you, please read it carefully since it will most likely answer any questions you may have. If after reading it you still need help please post the answers to the questions at the top.

  3. #3
    TyranT
    Guest

    Thanx for tha help

    My connection is DSL
    I get my service from Verizon and they tell me that the speed should in between 620kb and 720kbs. They never gave me a specific speed.

    I run Windows 98

    SpeedGuide.net TCP/IP Analyzer


    TCP properties for IP = insert random numbers here ()
    Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; MSN 2.5; Windows 98)
    Notes: Read the Analyzer FAQ if the above is not your IP address.

    TCP options string = 0204052a01010402
    MTU = 1362
    MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.
    MSS = 1322
    MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

    Default Receive Window (RWIN) = 9254
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled Receive Window = 9254

    RWIN is a multiple of MSS
    Other values for RWIN that might work well with your current MTU/MSS:
    507648 (MSS x 48 * scale factor of 8)
    253824 (MSS x 48 * scale factor of 4)
    126912 (MSS x 48 * scale factor of 2)
    63456 (MSS x 48)
    bandwidth * delay product:

    Your RcvWindow limits you to: 370.16 kbps (46.27 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 148.064 kbps (18.508 KBytes/s) @ 500ms
    Consider increasing your RWIN value to optimize TCP/IP for broadband.
    MTU Discovery (RFC1191) = ON
    Time to live left = 117 hops

    TTL value is ok.
    Timestamps (RFC1323) = OFF
    Selective Acknowledgements (RFC2018) = ON
    IP type of service field (RFC1349) = 00000000


    Thanx for the help

  4. #4
    Dr Tweak mnosteele52's Avatar
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    OK first we need to set your MTU properly, it may as easy as using the TCPOptimizer, if not there are a number of other fixes. Your MTU should be 1492, so try the following:

    Download the TCP Optimizer and try the following settings.

    Settings tab:

    select - DSL PPPoE
    check - custom settings
    network adapter selection - your NIC
    check modify all adapters
    maxmtu - 1492
    TTL - 64
    TCP Receive Window - 31944
    MTU Discovery - yes
    Black Hole Detect - no
    Selective Acks - yes
    Max Dup ACKs - 3
    TCP 1323 Options - uncheck both boxes

    Other Settings tab:

    Max Connections per Server - 8
    Max Connections per 1.0 Server - 10
    Lan Browsing Speedup - optimized

    Then select "Apply Changes" and reboot to take effect.

    VERY IMPORTANT TO DO THE FOLLOWING

    1. Under your Configuration tab for your Network settings make sure you have only the needed protocols.

    2. Install the vtcp 386 patch and the NDIS Update from here.

    3. Open IE and select tools - internet options - connections - LAN settings, make sure NOTHING there is checked.

    4. Make sure you have the latest drivers for your NIC from the manufacturer. Set your NIC duplex mode to 10mb half duplex for Cable, for DSL it is ISP dependent unless you are using a router, if so then set it to 100mb full duplex for both Cable & DSL (the instructions are in my Help & Tips link). If you are using a router make sure you have the latest firmware.

    5. Clear your temporary internet files.

    6. Power cycle your modem, unplug it for atleast 15 seconds.

    7. Download and update then do a scan with SpyBot 1.2 & Ad Aware 6.0 to remove any spyware then install and update SpywareBlaster to stay spyware FREE. YOU MUST USE BOTH AD AWARE & SPYBOT TO ENSURE YOU ARE SPYWARE FREE SINCE ONE FINDS WHAT THE OTHER MISSES.

    8. Make sure you do the faster web page tweak in my Help & Tips link.

    Once you do ALL of the above and reboot post another TCP/IP Analyzer test so that we can see if your MTU is set properly, if not we need to fix it.




  5. #5
    TyranT
    Guest

    This is the new results

    TCP properties for IP = add something catchy and hum along ()
    Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; MSN 2.5; Windows 98)
    Notes: Read the Analyzer FAQ if the above is not your IP address.

    TCP options string = 0204058601010402
    MTU = 1454
    MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.
    MSS = 1414
    MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

    Default Receive Window (RWIN) = 31944
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled Receive Window = 31944

    For optimum performance, consider changing RWIN to a multiple of MSS.
    Other values for RWIN that might work well with your current MTU/MSS:
    520352 (MSS x 46 * scale factor of 8)
    260176 (MSS x 46 * scale factor of 4)
    130088 (MSS x 46 * scale factor of 2)
    65044 (MSS x 46)
    bandwidth * delay product:

    Your RcvWindow limits you to: 1277.76 kbps (159.72 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 511.104 kbps (63.888 KBytes/s) @ 500ms
    MTU Discovery (RFC1191) = ON
    Time to live left = 53 hops

    TTL value is ok.
    Timestamps (RFC1323) = OFF
    Selective Acknowledgements (RFC2018) = ON
    IP type of service field (RFC1349) = 00000000

  6. #6
    Dr Tweak mnosteele52's Avatar
    Join Date
    Jul 2001
    Location
    Chesapeake, VA
    Posts
    11,912
    OK your MTU still isn't right, read here for a list of fixes.


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