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  • LAN/Internet (DSL) slower than an analog modem

    Dear friends,

    I have a LAN consisting of 2 XP pro. machines. They are connected via a DSL router/modem (built-in switch). One machine has high-speed access to the router (html-based configuration utility), the other machine's access speed is slower than an analog modem. The router is a Speedport W 701V. The cabling is Patch/Cat5/RJ45 Fast Ethernet. Any ideas?

    Thanks in advance

    Thomas

  • #2
    Re: LAN/Internet (DSL) slower than an analog modem

    I take it you have taken the cable connectors where they come in to Machine 1 and 2 and swapped them? Thus swapping the DSL router/modem ports WITH the patch cables as attached to the DSL device. And the issue does not move from Machine 1 to Machine 2 ???

    Initial situation:

    DSL port 1 --> Cable 1 --> Machine 1
    DSL port 2 --> Cable 2 --> Machine 2

    Swap test:

    DSL port 1 --> Cable 1 --> Machine 2
    DSL port 2 --> Cable 2 --> Machine 1

    Also missing how the "html-based configuration utility" comes in to play re: performance.
    Last edited by rvalstar; 4th February 2007, 20:40.
    Cheers,

    Rick

    ** Remember to give credit where credit is due and leave reputation points sigpic where appropriate **

    2006-2099 R Valstar. This post is offered "as is" for discussion purposes only with no express or implied warranty of any kind including, but not limited to, correctness or fitness for use. Nothing herein shall be construed as advice. Attempting any activity based on information in this post is done at your own risk.

    Comment


    • #3
      Re: LAN/Internet (DSL) slower than an analog modem

      I don't know much about your router, but I can help with the logic behind the tests. Take a look at the attached files. One contains the map of your network as I see it and the other one is the workflow of your tests (except the error with the cables: Cable1 is to PC1 and Cable2 is to PC2 - sorry)
      Test it and tell us please what's the outcome.
      BTW, this is yours too? http://www.experts-exchange.com/Netw..._22148422.html

      (Smart people act while I play drawing - Sorry, Rick )
      Last edited by sorinso; 9th November 2007, 21:28.

      Sorin Solomon


      In order to succeed, your desire for success should be greater than your fear of failure.
      -

      Comment


      • #4
        Re: LAN/Internet (DSL) slower than an analog modem

        Originally posted by sorinso View Post
        I don't know much about your router, but I can help with the logic behind the tests. Take a look at the attached files. One contains the map of your network as I see it and the other one is the workflow of your tests (except the error with the cables: Cable1 is to PC1 and Cable2 is to PC2 - sorry)
        Test it and tell us please what's the outcome.
        BTW, this is yours too? http://www.experts-exchange.com/Netw..._22148422.html

        (Smart people act while I play drawing - Sorry, Rick )
        Must be a slow night. I love you man.
        Cheers,

        Rick

        ** Remember to give credit where credit is due and leave reputation points sigpic where appropriate **

        2006-2099 R Valstar. This post is offered "as is" for discussion purposes only with no express or implied warranty of any kind including, but not limited to, correctness or fitness for use. Nothing herein shall be construed as advice. Attempting any activity based on information in this post is done at your own risk.

        Comment


        • #5
          Re: LAN/Internet (DSL) slower than an analog modem




          I'm not worthy ... I'll close the day, enough is enough...

          Sorin Solomon


          In order to succeed, your desire for success should be greater than your fear of failure.
          -

          Comment


          • #6
            Re: LAN/Internet (DSL) slower than an analog modem

            I want to know why he is NOT allowed to install Java on the machine? Is this your machine or is it someone elses?
            1 1 was a racehorse.
            2 2 was 1 2.
            1 1 1 1 race 1 day,
            2 2 1 1 2

            Comment


            • #7
              Re: LAN/Internet (DSL) slower than an analog modem

              Originally posted by biggles77 View Post
              I want to know why he is NOT allowed to install Java on the machine? Is this your machine or is it someone elses?
              I'm thinking Milo has some illegal substance in it. Where did the Java bit come from?
              Cheers,

              Rick

              ** Remember to give credit where credit is due and leave reputation points sigpic where appropriate **

              2006-2099 R Valstar. This post is offered "as is" for discussion purposes only with no express or implied warranty of any kind including, but not limited to, correctness or fitness for use. Nothing herein shall be construed as advice. Attempting any activity based on information in this post is done at your own risk.

              Comment


              • #8
                Re: LAN/Internet (DSL) slower than an analog modem

                Originally posted by sorinso View Post
                BTW, this is yours too? http://www.experts-exchange.com/Netw..._22148422.html

                (Smart people act while I play drawing - Sorry, Rick )

                No Milo needed for this puppy.
                1 1 was a racehorse.
                2 2 was 1 2.
                1 1 1 1 race 1 day,
                2 2 1 1 2

                Comment


                • #9
                  Re: LAN/Internet (DSL) slower than an analog modem

                  Ah, I obviously missed that as I didn't wade through all the advertisements on that site -- I'm not a fan.

                  I think I need to find some Milo.

                  That TCP Optimizer utility mentioned in that thread really didn't do much IMHO. It verified largest MTU and outside ping response, it did not validate speed. Also it did not recognize I had the capability for Jumbo Frames

                  To test Internet speed, many ISP's provide a web-based utility. Here in Italy, they have me FTP a LINUX image from their file server . So instead, I use this site which seems to give accurate download / upload speeds throughout the world (and I like the speedometer):

                  http://www.abeltronica.com/velocimet...=uk&newlang=uk
                  Cheers,

                  Rick

                  ** Remember to give credit where credit is due and leave reputation points sigpic where appropriate **

                  2006-2099 R Valstar. This post is offered "as is" for discussion purposes only with no express or implied warranty of any kind including, but not limited to, correctness or fitness for use. Nothing herein shall be construed as advice. Attempting any activity based on information in this post is done at your own risk.

                  Comment


                  • #10
                    Re: LAN/Internet (DSL) slower than an analog modem

                    Dear friends,

                    the experts-exchange thread is mine too. I'm not allowed to install Java on the machine as it is not my computer. I made Sorinso's tests and identified Pc2 as the problem. I think the NIC of Pc2 is the problem, but a few days ago it worked properly.

                    Comment


                    • #11
                      Re: LAN/Internet (DSL) slower than an analog modem

                      That's a good point to start from.
                      Please go to Start -> Settings -> Network Connections. Double click on the NIC. What's written on the speed (see the attached screenshot)?
                      Last edited by sorinso; 9th November 2007, 21:28.

                      Sorin Solomon


                      In order to succeed, your desire for success should be greater than your fear of failure.
                      -

                      Comment


                      • #12
                        Re: LAN/Internet (DSL) slower than an analog modem

                        http://netspeed.stanford.edu/


                        Test:

                        TCP/Web100 Network Diagnostic Tool v5.4.12
                        click START to begin
                        Connected to: netspeed.stanford.edu -- Using IPv4 address
                        Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
                        checking for firewalls . . . . . . . . . . . . . . . . . . . Done
                        running 10s outbound test (client-to-server [C2S]) . . . . . 73.0kb/s
                        running 10s inbound test (server-to-client [S2C]) . . . . . . 2.46kb/s
                        Your PC is connected to a Cable/DSL modem
                        Information: Other network traffic is congesting the link
                        [S2C]: Packet queuing detected

                        click START to re-test


                        Statistics:

                        WEB100 Enabled Statistics:
                        Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
                        checking for firewalls . . . . . . . . . . . . . . . . . . . Done
                        running 10s outbound test (client-to-server [C2S]) . . . . . 73.0kb/s
                        running 10s inbound test (server-to-client [S2C]) . . . . . . 2.46kb/s

                        ------ Client System Details ------
                        OS data: Name = Windows XP, Architecture = x86, Version = 5.1
                        Java data: Vendor = Sun Microsystems Inc., Version = 1.6.0

                        ------ Web100 Detailed Analysis ------
                        Cable modem/DSL/T1 link found.
                        Link set to Full Duplex mode
                        Information: throughput is limited by other network traffic.
                        Good network cable(s) found
                        Normal duplex operation found.

                        Web100 reports the Round trip time = 349.0 msec; the Packet size = 1452 Bytes; and
                        There were 11 packets retransmitted, 7 duplicate acks received, and 7 SACK blocks received
                        The connection stalled 1 times due to packet loss
                        The connection was idle 1.05 seconds (0.77%) of the time
                        C2S throughput test: Packet queuing detected: 8.55%
                        S2C throughput test: Packet queuing detected: 97.48%
                        This connection is network limited 99.97% of the time.
                        Excessive packet loss is impacting your performance, check the auto-negotiate function on your local PC and network switch

                        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: OFF

                        Server 'netspeed.stanford.edu' is probably behind a firewall. [Connection to the ephemeral port failed]
                        Client is probably behind a firewall. [Connection to the ephemeral port failed]
                        Information: Network Middlebox is modifying MSS variable
                        Server IP addresses are preserved End-to-End
                        Information: Network Address Translation (NAT) box is modifying the Client's IP address
                        Server says [217.238.51.7] but Client says [192.168.2.3]


                        More Details:

                        WEB100 Kernel Variables:
                        Client: localhost/127.0.0.1
                        CurMSS: 1452
                        X_Rcvbuf: 87380
                        X_Sndbuf: 16384
                        AckPktsIn: 11
                        AckPktsOut: 0
                        BytesRetrans: 16566
                        CongAvoid: 0
                        CongestionOverCount: 0
                        CongestionSignals: 7
                        CountRTT: 1
                        CurCwnd: 2904
                        CurRTO: 1047
                        CurRwinRcvd: 65535
                        CurRwinSent: 6432
                        CurSsthresh: 2904
                        DSACKDups: 0
                        DataBytesIn: 235
                        DataBytesOut: 34763
                        DataPktsIn: 1
                        DataPktsOut: 25
                        DupAcksIn: 7
                        ECNEnabled: 0
                        FastRetran: 0
                        MaxCwnd: 4356
                        MaxMSS: 1452
                        MaxRTO: 1047
                        MaxRTT: 349
                        MaxRwinRcvd: 65535
                        MaxRwinSent: 6432
                        MaxSsthresh: 2904
                        MinMSS: 726
                        MinRTO: 1047
                        MinRTT: 349
                        MinRwinRcvd: 65535
                        MinRwinSent: 6432
                        NagleEnabled: 1
                        OtherReductions: 0
                        PktsIn: 12
                        PktsOut: 25
                        PktsRetrans: 11
                        RcvWinScale: 2147483647
                        SACKEnabled: 3
                        SACKsRcvd: 7
                        SendStall: 0
                        SlowStart: 4
                        SampleRTT: 349
                        SmoothedRTT: 349
                        SndWinScale: 2147483647
                        SndLimTimeRwin: 0
                        SndLimTimeCwnd: 136644765
                        SndLimTimeSender: 36085
                        SndLimTransRwin: 0
                        SndLimTransCwnd: 1
                        SndLimTransSender: 1
                        SndLimBytesRwin: 0
                        SndLimBytesCwnd: 34638
                        SndLimBytesSender: 125
                        SubsequentTimeouts: 6
                        SumRTT: 349
                        Timeouts: 1
                        TimestampsEnabled: 0
                        WinScaleRcvd: 2147483647
                        WinScaleSent: 2147483647
                        DupAcksOut: 0
                        StartTimeUsec: 135159
                        Duration: 223408584
                        c2sData: 2
                        c2sAck: 2
                        s2cData: 1
                        s2cAck: 1
                        half_duplex: 0
                        link: 100
                        congestion: 1
                        bad_cable: 0
                        mismatch: 0
                        spd: 0.00
                        bw: 0.06
                        loss: 0.280000000
                        avgrtt: 349.00
                        waitsec: 1.05
                        timesec: 136.00
                        order: 0.6364
                        rwintime: 0.0000
                        sendtime: 0.0003
                        cwndtime: 0.9997
                        rwin: 0.5000
                        swin: 0.1250
                        cwin: 0.0332
                        rttsec: 0.349000
                        Sndbuf: 16384
                        aspd: 0.00000
                        CWND-Limited: 7.21

                        The theoretical network limit is 0.06 Mbps
                        The NDT server has a 8.0 KByte buffer which limits the throughput to 0.35 Mbps
                        Your PC/Workstation has a 63.0 KByte buffer which limits the throughput to 1.43 Mbps
                        The network based flow control limits the throughput to 0.09 Mbps

                        Client Data reports link is 'T1', Client Acks report link is 'T1'
                        Server Data reports link is 'Dial-up', Server Acks report link is 'Dial-up'

                        Comment


                        • #13
                          Re: LAN/Internet (DSL) slower than an analog modem

                          Hi sorinso,

                          100,0 MBit/s

                          Comment


                          • #14
                            Re: LAN/Internet (DSL) slower than an analog modem

                            Originally posted by tk1 View Post
                            Information: Other network traffic is congesting the link
                            [S2C]: Packet queuing detected
                            Hmmmmmmmm... Sounds strange... Let's see if this is the reason.
                            Can you post a list of the clients na dprotocols you have running on the NIC?

                            Sorin Solomon


                            In order to succeed, your desire for success should be greater than your fear of failure.
                            -

                            Comment


                            • #15
                              Re: LAN/Internet (DSL) slower than an analog modem

                              Where do I have to look?

                              Comment

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