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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Quandary - (was 30 foot phone line)
I found such good help here on the subject of my DSL line speed I hope you
don't mind if I come back with this semi OT follow up. I currently don't know if there is, or ever was anything wrong with my DSL speed. I would be interested to hear if you think there is something wrong by these symptoms. My ISP Earthlink's standard referral for a DSL speed test is 2wire.com. The average of 42 speed tests on my system is 1420 Kbps. I'm paying for 6000 Kbps. The AT&T tech rep tested my line and said it was good to up to his NID. My next door neighbor is on AT&T's 6000 Kbps plan. I performed the 2wire test on his system and he easily got 4750 Kbps, so I ran home and tested mine and got the usual 1390 Kbps. It seems clear that my neighborhood should be able to get around 5000 Kbps. Ok.. that sounds like there's something wrong, right? The trouble is, my neighbor introduced me to his speed test site http://www.speedtest.net/index.php and I've been getting a pretty consistent 4400 Kbps on that site. On the DSLReports.com tests I get 1200 to 2500 Kbps, usually around 1500 Kbps. On AT&T test sites I get 1800 to 3000 Kbps. I'm all over the board. These are my speed tests on one day if it will help: http://img.photobucket.com/albums/v1...jun-11-001.jpg Does it seem to you like I've got something wrong? I need to know how hard I should work on this... Dallas (If you're interested, these are the test sites http://helpme.att.net/dsl/speedtest/ http://www.speakeasy.net/speedtest/ http://www.dslreports.com/speedtest http://www.2wire.com/ http://www.speedtest.net/index.php |
#2
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Quandary - (was 30 foot phone line)
On Wed, 11 Jun 2008 15:10:07 -0500, "Dallas"
wrote: The trouble is, my neighbor introduced me to his speed test site http://www.speedtest.net/index.php and I've been getting a pretty consistent 4400 Kbps on that site. On the DSLReports.com tests I get 1200 to 2500 Kbps, usually around 1500 Kbps. On AT&T test sites I get 1800 to 3000 Kbps. I'm all over the board. Sounds like the problem is very possibly with your provider, although I wouldn't completely rule out that your networking parameters aren't quite peaked and tweaked. Are you confident that your MSS, MTU, and RWIN are appropriate for your connection? -- Rich Webb Norfolk, VA |
#3
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Quandary - (was 30 foot phone line)
It is not uncommon for speed test sites to show conflicting results. This
method can be somewhat unreliable. I've found that simple FTP file transfers (puts and gets) of large files using the DOS ftp prompt (hash disabled) give the most predictable results. (Results are displayed in KBytes/Second when the transfer ends). Can you answer a couple of other simple questions: What is the round trip latency you measured to the test site being used (lower is better)? What is your TCP window set to in the registry on your computer (should be #FFFF to maximize throughput)? Bob "Dallas" wrote in message m... I found such good help here on the subject of my DSL line speed I hope you don't mind if I come back with this semi OT follow up. I currently don't know if there is, or ever was anything wrong with my DSL speed. I would be interested to hear if you think there is something wrong by these symptoms. My ISP Earthlink's standard referral for a DSL speed test is 2wire.com. The average of 42 speed tests on my system is 1420 Kbps. I'm paying for 6000 Kbps. The AT&T tech rep tested my line and said it was good to up to his NID. My next door neighbor is on AT&T's 6000 Kbps plan. I performed the 2wire test on his system and he easily got 4750 Kbps, so I ran home and tested mine and got the usual 1390 Kbps. It seems clear that my neighborhood should be able to get around 5000 Kbps. Ok.. that sounds like there's something wrong, right? The trouble is, my neighbor introduced me to his speed test site http://www.speedtest.net/index.php and I've been getting a pretty consistent 4400 Kbps on that site. On the DSLReports.com tests I get 1200 to 2500 Kbps, usually around 1500 Kbps. On AT&T test sites I get 1800 to 3000 Kbps. I'm all over the board. These are my speed tests on one day if it will help: http://img.photobucket.com/albums/v1...jun-11-001.jpg Does it seem to you like I've got something wrong? I need to know how hard I should work on this... Dallas (If you're interested, these are the test sites http://helpme.att.net/dsl/speedtest/ http://www.speakeasy.net/speedtest/ http://www.dslreports.com/speedtest http://www.2wire.com/ http://www.speedtest.net/index.php |
#4
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Quandary - (was 30 foot phone line)
"Rich Webb" wrote in message Are you confident that your MSS, MTU, and RWIN are appropriate for your connection? I'm running PPPoE - MTU is set to 1492. Here are my DSLreports.com tweak test results: http://img.photobucket.com/albums/v1...estresults.jpg Dallas |
#5
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Quandary - (was 30 foot phone line)
"Bob Shuman" wrote in message What is the round trip latency you measured to the test site being used (lower is better)? Pinging 2wire.com [216.52.29.100] with 32 bytes of data: Reply from 216.52.29.100: bytes=32 time=71ms TTL=243 Reply from 216.52.29.100: bytes=32 time=51ms TTL=243 Reply from 216.52.29.100: bytes=32 time=51ms TTL=243 Reply from 216.52.29.100: bytes=32 time=50ms TTL=243 Ping statistics for 216.52.29.100: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 50ms, Maximum = 71ms, Average = 55ms -- Pings look pretty good... (FYI 2Wire.com is in San Jose, CA) What is your TCP window set to in the registry on your computer (should be #FFFF to maximize throughput)? Hum.. I don't know.. and don't know how to check.. how do I do that? FYI, as in the reply to Rich Webb, here are my DSLreports.com tweak test results: http://img.photobucket.com/albums/v1...estresults.jpg They show a transfer rate of 2021 Kbps which seems miserable considering I'm expecting 5000ish. Dallas Bob "Dallas" wrote in message m... I found such good help here on the subject of my DSL line speed I hope you don't mind if I come back with this semi OT follow up. I currently don't know if there is, or ever was anything wrong with my DSL speed. I would be interested to hear if you think there is something wrong by these symptoms. My ISP Earthlink's standard referral for a DSL speed test is 2wire.com. The average of 42 speed tests on my system is 1420 Kbps. I'm paying for 6000 Kbps. The AT&T tech rep tested my line and said it was good to up to his NID. My next door neighbor is on AT&T's 6000 Kbps plan. I performed the 2wire test on his system and he easily got 4750 Kbps, so I ran home and tested mine and got the usual 1390 Kbps. It seems clear that my neighborhood should be able to get around 5000 Kbps. Ok.. that sounds like there's something wrong, right? The trouble is, my neighbor introduced me to his speed test site http://www.speedtest.net/index.php and I've been getting a pretty consistent 4400 Kbps on that site. On the DSLReports.com tests I get 1200 to 2500 Kbps, usually around 1500 Kbps. On AT&T test sites I get 1800 to 3000 Kbps. I'm all over the board. These are my speed tests on one day if it will help: http://img.photobucket.com/albums/v1...jun-11-001.jpg Does it seem to you like I've got something wrong? I need to know how hard I should work on this... Dallas (If you're interested, these are the test sites http://helpme.att.net/dsl/speedtest/ http://www.speakeasy.net/speedtest/ http://www.dslreports.com/speedtest http://www.2wire.com/ http://www.speedtest.net/index.php |
#6
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Quandary - (was 30 foot phone line)
"Meat Plow" wrote in message This is what I use to test my speed as you can select a locale closer to you. http://helpme.att.net/dsl/speedtest/ Yeah... this is why I think something is wrong, at your test site using a Dallas test at 06:06 PM I'm getting: Your Throughput Download = 965.97 kbps Upload = 622.76 kbps Pretty sick. Trouble is... I have tested as high as 4711 Kbps on the Speedtest.com site which seems to indicate that everything is fine... or at least there is nothing capping the line speed. Dallas |
#7
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Quandary - (was 30 foot phone line)
On Wed, 11 Jun 2008 17:59:35 -0500, "Dallas"
wrote: "Bob Shuman" wrote in message What is the round trip latency you measured to the test site being used (lower is better)? Pinging 2wire.com [216.52.29.100] with 32 bytes of data: Reply from 216.52.29.100: bytes=32 time=71ms TTL=243 Reply from 216.52.29.100: bytes=32 time=51ms TTL=243 Reply from 216.52.29.100: bytes=32 time=51ms TTL=243 Reply from 216.52.29.100: bytes=32 time=50ms TTL=243 Ping statistics for 216.52.29.100: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 50ms, Maximum = 71ms, Average = 55ms -- Pings look pretty good... (FYI 2Wire.com is in San Jose, CA) What is your TCP window set to in the registry on your computer (should be #FFFF to maximize throughput)? Hum.. I don't know.. and don't know how to check.. how do I do that? FYI, as in the reply to Rich Webb, here are my DSLreports.com tweak test results: http://img.photobucket.com/albums/v1...estresults.jpg They show a transfer rate of 2021 Kbps which seems miserable considering I'm expecting 5000ish. One tool that may give a hint of what's happening is the "DU Meter" which gives you a graph of transfer speed vs time (and does a much better job of it than the Windows built-in monitor). If you're getting a full-speed connection then the graph will show a steady rate, but if you're suffering from variable choke-points between you and the remote machine it's pretty obvious. http://www.dumeter.com/ -- Rich Webb Norfolk, VA |
#8
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Quandary - (was 30 foot phone line)
Rich Webb wrote:
On Wed, 11 Jun 2008 15:10:07 -0500, "Dallas" wrote: The trouble is, my neighbor introduced me to his speed test site http://www.speedtest.net/index.php and I've been getting a pretty consistent 4400 Kbps on that site. On the DSLReports.com tests I get 1200 to 2500 Kbps, usually around 1500 Kbps. On AT&T test sites I get 1800 to 3000 Kbps. I'm all over the board. Sounds like the problem is very possibly with your provider, although I wouldn't completely rule out that your networking parameters aren't quite peaked and tweaked. Are you confident that your MSS, MTU, and RWIN are appropriate for your connection? In addition to checking the parameters, I'd run a tracert or ping on the address to the speed test site. You should be able to find the bottleneck to the slow sites, given that some tests indicate nearly full bandwidth. jak |
#9
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Quandary - (was 30 foot phone line)
"jakdedert" wrote in message I'd run a tracert or ping on the address Nice! tracert is very handy, I think I knew about it, then forgot it over the years. My 2Wire.com results: http://img.photobucket.com/albums/v1...acert2wire.jpg If I'm reading this right it shows I've got a good first hop to mindspring my ISP, so no bottlenecks to the POP. Everything else seems within reasonable boundarys? My speedtest with 2wire showed 1050 Kbps about the same time. Dallas |
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