dlai

Comcast 6mb/384kpbs plan: :::.. Download Stats ..::: Connection is:: 8010 Kbps about 8 Mbps (tested with 5983 kB) Download Speed is:: 978 kB/s Tested From:: https://testmy.net (server1) Test Time:: Mon Feb 20 2006 18:21:16 GMT-0800 (Pacific Standard Time) Bottom Line:: 143X faster than 56K 1MB download in 1.05 sec Diagnosis: Awesome! 20% + : 67.68 % faster than the average for host (comcast.net) Validation Link:: https://testmy.net/stats/id-CVW06YAQG

Here's an interesting update. It appears that some IBM Thinkpads use an Intel Pro 2200BG mini pci card which has a problem connecting to Linksys routers. The symptoms are slow wireless access, and transmit speeds that start at 54 Mbps and then slows down to 24 mpbs, exactly the problems I'm having. This problem is widespread and the fix is replacing that card with a newer IBM a/b/g card based on the Atheros chipset. This is what I'm going to do and have contacted an IBM warranty center already. So for anyone that has a Thinkpad with speed issues or connection drops, that is the fix...

Fallow, thanks for the link. It's not the case with the problem I'm experiencing. Signal strength is at the max, and I don't experience the same issues with the other laptops I have, only with the one in question. My wap has a 7db antenna as well, and the problem still occurs if I'm sitting right next to the wap with this one laptop in question. I did load the new drivers last night with no improvements in the performance, sad to say. So I'm inclined to think that there is something wrong with the built-in wireless nic in the laptop. This morning I did a direct connect to my router via an ethernet cable and got 7mb right away, so that pretty much seals it in my mind that it's the wireless nic that's at fault.

Will do. I just went to the IBM website and noticed there's some new drivers related to the networking components, including a new one for the nic. It's downloading now (remembering that it's slow on that computer), so it will take a while, but I'll retest things when it's done. I really appreciate your help, and steering me in the right direction....

Thanks for your time and help. Guess I'll have to figure out how to get the laptop repaired. Thanks again.

Same connection, different laptops both with built in wireless. I'm guessing then that the IBM might have a defective NIC, correct?

BUT, here's the results from my other laptop, much different results: WEB100 Kernel Variables: Client: localhost/127.0.0.1 AckPktsIn: 3154 AckPktsOut: 0 BytesRetrans: 102200 CongAvoid: 2940 CongestionOverCount: 0 CongestionSignals: 5 CountRTT: 2983 CurCwnd: 40880 CurMSS: 1460 CurRTO: 270 CurRwinRcvd: 921600 CurRwinSent: 16304 CurSsthresh: 5840 DSACKDups: 0 DataBytesIn: 0 DataBytesOut: 8957100 DataPktsIn: 0 DataPktsOut: 6135 DupAcksIn: 142 ECNEnabled: 0 FastRetran: 5 MaxCwnd: 91980 MaxMSS: 1460 MaxRTO: 300 MaxRTT: 110 MaxRwinRcvd: 921600 MaxRwinSent: 16304 MaxSsthresh: 45260 MinMSS: 1460 MinRTO: 220 MinRTT: 20 MinRwinRcvd: 57600 MinRwinSent: 16304 NagleEnabled: 1 OtherReductions: 0 PktsIn: 3154 PktsOut: 6135 PktsRetrans: 70 X_Rcvbuf: 103424 RcvWinScale: 7 SACKEnabled: 3 SACKsRcvd: 160 SendStall: 0 SlowStart: 41 SampleRTT: 30 SmoothedRTT: 70 X_Sndbuf: 103424 SndWinScale: 4 SndLimTimeRwin: 0 SndLimTimeCwnd: 10039806 SndLimTimeSender: 2584 SndLimTransRwin: 0 SndLimTransCwnd: 1 SndLimTransSender: 1 SndLimBytesRwin: 0 SndLimBytesCwnd: 8957100 SndLimBytesSender: 0 SubsequentTimeouts: 0 SumRTT: 151380 Timeouts: 0 TimestampsEnabled: 0 WinScaleRcvd: 4 WinScaleSent: 7 DupAcksOut: 0 StartTimeUsec: 727412 Duration: 10045535 c2sData: 2 c2sAck: 2 s2cData: 9 s2cAck: 3 half_duplex: 0 link: 100 congestion: 1 bad_cable: 0 mismatch: 0 spd: 0.00 bw: 7.69 loss: 0.000814996 avgrtt: 50.75 waitsec: 0.00 timesec: 10.00 order: 0.0450 rwintime: 0.0000 sendtime: 0.0003 cwndtime: 0.9997 rwin: 7.0312 swin: 64.0000 cwin: 0.7018 rttsec: 0.050748 Sndbuf: 8388608 aspd: 19.86236 Checking for mismatch on uplink (speed > 50 [0>50], (xmitspeed < 5) [0.40<5] (rwintime > .9) [0>.9], (loss < .01) [8.14<.01] Checking for excessive errors condition (loss/sec > .15) [8.14>.15], (cwndtime > .6) [0.99>.6], (loss < .01) [8.14<.01], (MaxSsthresh > 0) [45260>0] Checking for 10 Mbps link (speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0] (xmitspeed < 9.5) [0.40<9.5] (loss < .01) [8.14<.01], (mylink > 0) [3.0>0] Checking for Wireless link (sendtime = 0) [3.0E=0], (speed < 5) [0<5] (Estimate > 50 [7.69>50], (Rwintime > 90) [0>.90] (RwinTrans/CwndTrans = 1) [0/1=1], (mylink > 0) [3.0>0] Checking for DSL/Cable Modem link (speed < 2) [0<2], (SndLimTransSender = 0) [1=0] (SendTime = 0) [3.0E-4=0], (mylink > 0) [3.0>0] Checking for half-duplex condition (rwintime > .95) [0>.95], (RwinTrans/sec > 30) [0>30], (SenderTrans/sec > 30) [0.1>30], OR (mylink <= 10) [3.0<=10] Checking for congestion (cwndtime > .02) [0.99>.02], (mismatch = 0) [0=0] (MaxSsthresh > 0) [45260>0] estimate = 7.69 based on packet size = 11Kbits, RTT = 50.75msec, and loss = 8.14996E-4 The theoretical network limit is 7.69 Mbps The NDT server has a 8192.0 KByte buffer which limits the throughput to 1261.13 Mbps Your PC/Workstation has a 900.0 KByte buffer which limits the throughput to 138.55 Mbps The network based flow control limits the throughput to 13.82 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 slow laptop is an IBM Thinkpad T42 running XP Pro. The faster one is a Sony PCG K45 running XP Pro as well. I really think there's someone going on with the IBM...

Statistics: WEB100 Enabled Statistics: Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done running 10s outbound test (client to server) . . . . . 365.75Kb/s running 10s inbound test (server to client) . . . . . . 523.94kb/s ------ Client System Details ------ OS data: Name = Windows XP, Architecture = x86, Version = 5.1 Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_06 ------ 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 = 2023.33 msec; the Packet size = 1460 Bytes; and No packet loss was observed. This connection is receiver limited 37.47% of the time. Increasing the the client's receive buffer (196.0 KB) will improve performance This connection is network limited 62.51% 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 Packet size is preserved End-to-End Server IP addresses are preserved End-to-End More Details: WEB100 Kernel Variables: Client: localhost/127.0.0.1 AckPktsIn: 193 AckPktsOut: 0 BytesRetrans: 0 CongAvoid: 0 CongestionOverCount: 0 CongestionSignals: 0 CountRTT: 192 CurCwnd: 202940 CurMSS: 1460 CurRTO: 6740 CurRwinRcvd: 201480 CurRwinSent: 16304 CurSsthresh: 2147483647 DSACKDups: 0 DataBytesIn: 0 DataBytesOut: 747520 DataPktsIn: 0 DataPktsOut: 512 DupAcksIn: 0 ECNEnabled: 0 FastRetran: 0 MaxCwnd: 202940 MaxMSS: 1460 MaxRTO: 6740 MaxRTT: 4980 MaxRwinRcvd: 201480 MaxRwinSent: 16304 MaxSsthresh: 0 MinMSS: 1460 MinRTO: 270 MinRTT: 70 MinRwinRcvd: 50370 MinRwinSent: 16304 NagleEnabled: 1 OtherReductions: 0 PktsIn: 193 PktsOut: 512 PktsRetrans: 0 X_Rcvbuf: 103424 RcvWinScale: 7 SACKEnabled: 3 SACKsRcvd: 0 SendStall: 0 SlowStart: 137 SampleRTT: 4980 SmoothedRTT: 4770 X_Sndbuf: 103424 SndWinScale: 2 SndLimTimeRwin: 4075299 SndLimTimeCwnd: 6798850 SndLimTimeSender: 2574 SndLimTransRwin: 1 SndLimTransCwnd: 1 SndLimTransSender: 1 SndLimBytesRwin: 157680 SndLimBytesCwnd: 589840 SndLimBytesSender: 0 SubsequentTimeouts: 0 SumRTT: 388480 Timeouts: 0 TimestampsEnabled: 0 WinScaleRcvd: 2 WinScaleSent: 7 DupAcksOut: 0 StartTimeUsec: 659258 Duration: 10880006 c2sData: 2 c2sAck: 2 s2cData: 9 s2cAck: 2 half_duplex: 0 link: 100 congestion: 0 bad_cable: 0 mismatch: 0 spd: 0.00 bw: 5.51 loss: 0.000001000 avgrtt: 2023.33 waitsec: 0.00 timesec: 10.00 order: 0.0000 rwintime: 0.3747 sendtime: 0.0002 cwndtime: 0.6251 rwin: 1.5372 swin: 64.0000 cwin: 1.5483 rttsec: 2.023333 Sndbuf: 8388608 aspd: 1.85072 Checking for mismatch on uplink (speed > 50 [0>50], (xmitspeed < 5) [0.36<5] (rwintime > .9) [0.37>.9], (loss < .01) [1.0E<.01] Checking for excessive errors condition (loss/sec > .15) [1.0E>.15], (cwndtime > .6) [0.62>.6], (loss < .01) [1.0E<.01], (MaxSsthresh > 0) [0>0] Checking for 10 Mbps link (speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0] (xmitspeed < 9.5) [0.36<9.5] (loss < .01) [1.0E<.01], (mylink > 0) [3.0>0] Checking for Wireless link (sendtime = 0) [2.0E=0], (speed < 5) [0<5] (Estimate > 50 [5.51>50], (Rwintime > 90) [0.37>.90] (RwinTrans/CwndTrans = 1) [1/1=1], (mylink > 0) [3.0>0] Checking for DSL/Cable Modem link (speed < 2) [0<2], (SndLimTransSender = 0) [1=0] (SendTime = 0) [2.0E-4=0], (mylink > 0) [3.0>0] Checking for half-duplex condition (rwintime > .95) [0.37>.95], (RwinTrans/sec > 30) [0.1>30], (SenderTrans/sec > 30) [0.1>30], OR (mylink <= 10) [3.0<=10] Checking for congestion (cwndtime > .02) [0.62>.02], (mismatch = 0) [0=0] (MaxSsthresh > 0) [0>0] estimate = 5.51 based on packet size = 11Kbits, RTT = 2023.33msec, and loss = 1.0E-6 The theoretical network limit is 5.51 Mbps The NDT server has a 8192.0 KByte buffer which limits the throughput to 31.63 Mbps Your PC/Workstation has a 196.0 KByte buffer which limits the throughput to 0.75 Mbps The network based flow control limits the throughput to 0.76 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 'T1'

I'm hoping someone can help me with some speed issues I'm having. I have two laptops using XP connecting to a 6mb Comcastconnection via wireless G. I've loaded cablenut and TCP optimizer on both and have the settings equal on both computers. However, one is able to connect at 7mb and the other only at 387 kbps. Upload is slow too. I can't figure out for the life of me why this one laptop is so slow. Hopefully someone can help out with some suggestions. Here's some data: TCP properties for IP = (xxxxxx) Browser/OS = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7 Notes: Read the Analyzer FAQ if the above is not your IP address. TCP options string = 020405b40103030201010402 MTU = 1500 MTU is fully optimized for broadband. MSS = 1460 Maximum useful data in each packet = 1460, which equals MSS. Default TCP Receive Window (RWIN) = 256960 RWIN Scaling (RFC1323) = 2 bits (scale factor of 4) Unscaled TCP Receive Window = 64240 RWIN is a multiple of MSS Other values for RWIN that might work well with your current MTU/MSS: 513920 (MSS x 44 * scale factor of 128480 (MSS x 44 * scale factor of 2) 64240 (MSS x 44) bandwidth * delay product (Note this is not a speed test): Your TCP Window limits you to: 10278.4 kbps (1284.8 KBytes/s) @ 200ms Your TCP Window limits you to: 4111.36 kbps (513.92 KBytes/s) @ 500ms MTU Discovery (RFC1191) = OFF Time to live left = 51 hops TTL value is ok. Timestamps (RFC1323) = OFF Selective Acknowledgements (RFC2018) = ON IP type of service field (RFC1349) = 00100000 (32) Precedence (priority) = 001 (priority) Delay = 0 (normal delay) Throughput = 0 (normal throughput) Reliability = 0 (normal reliability) Cost = 0 (normal cost) Check bit = 0 (correct, 8th checking bit must be zero) DiffServ (RFC 2474) = CS1 001000 ( - class 1 (RFC 2474). Similar forwarding behavior to the ToS Precedence field. More stuff: :::.. Download Stats ..::: Connection is:: 387 Kbps about 0.4 Mbps (tested with 748 kB) Download Speed is:: 47 kB/s Tested From:: https://testmy.net (server2) Test Time:: Tue Feb 07 2006 16:38:27 GMT-0800 (Pacific Standard Time) Bottom Line:: 7X faster than 56K 1MB download in 21.79 sec Diagnosis: May need help : running at only 8.13 % of your hosts average (comcast.net) Validation Link:: https://testmy.net/stats/id-TWRMQE7CP

6mb Plan, San Francisco Area. I did the tests two hours apart and they are pretty much the same: ::.. Download Stats ..::: Connection is:: 7819 Kbps about 7.8 Mbps (tested with 5983 kB) Download Speed is:: 954 kB/s Tested From:: https://testmy.net (server2) Test Time:: Tue Feb 07 2006 09:17:58 GMT-0800 (Pacific Standard Time) Bottom Line:: 140X faster than 56K 1MB download in 1.07 sec Diagnosis: Awesome! 20% + : 64.2 % faster than the average for host (comcast.net) Validation Link:: https://testmy.net/stats/id-PSE6J95GB :::.. Download Stats ..::: Connection is:: 7819 Kbps about 7.8 Mbps (tested with 5983 kB) Download Speed is:: 954 kB/s Tested From:: https://testmy.net (server2) Test Time:: Tue Feb 07 2006 11:18:28 GMT-0800 (Pacific Standard Time) Bottom Line:: 140X faster than 56K 1MB download in 1.07 sec Diagnosis: Awesome! 20% + : 64.16 % faster than the average for host (comcast.net) Validation Link:: https://testmy.net/stats/id-Z2SHOXUF5