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

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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:

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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:)

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Reply to
Dallas
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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?

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Rich Webb     Norfolk, VA
Reply to
Rich Webb

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I upgraded to the 2WIRE 2701HG-B Wireless Gateway. It shows detailed connection stats fore the broadband connection like cell header errors, loss of cell delineation for the ATM, and link retrains, training errors, loss of frame failures, correctable/uncorrectable blocks, delay of latency path, impulse noise protection,final rx gain, VCXO freq offset and I could go on and on.

Late last night I started having connection problems so I opened the link to the router and saw many cell header errors that came back when I reset the statistics. I also notice my modem retrained for 3129 kbps whereas before it had been at 5321. This morning things were back to normal and when I reset the DSL connection the modem retrained back to 5120 kbps KB/s. I have no home phone or phone lines connected as the wire pair terminates in an outlet that only the DSL line is plugged into so there was nothing that could have caused noise on my end.

You really need something like the 2WIRE 2701HG-B and it's advanced logging and diagnostics to troubleshoot your problem. My download is capped at 6000 kbps I can get around 4.4 mbps down and around 688 kbps up. I'll never see 6 because I'm 13k feet from the DSLAM as DSL signals at

300khz attenuate rapidly in copper wire at the gauge they use.

This is what I use to test my speed as you can select a locale closer to you.

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Reply to
Meat Plow

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

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Reply to
Bob Shuman

I'm running PPPoE - MTU is set to 1492.

Here are my DSLreports.com tweak test results:

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Dallas

Reply to
Dallas

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)

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:

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They show a transfer rate of 2021 Kbps which seems miserable considering I'm expecting 5000ish.

Dallas

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Reply to
Dallas

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

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Reply to
Dallas

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.

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--
Rich Webb     Norfolk, VA
Reply to
Rich Webb

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

Reply to
jakdedert

I think you have some noise on your DSL line causing ATM cell errors and DSL block errors. You'll need to get AT&T back out with a test rig they can plug in where your modem plugs in. My modem has all that stuff built in have a look: (view with fixed width font)

Broadband Link ? Detailed DSL Statistics

Collected for 1 day 12:07:11 ATM Since Reset Current 24-Hour Interval Current 15-Minute Interval Time Since Last Event Cell Header Errors: 4976 826 3 0:00:18 Loss of Cell Delineation: 942 178 0 0:09:10 DSL Link Retrains: 1 0 0 1 day 12:06:54 DSL Training Errors: 0 0 0 0:00:00 Training Timeouts: 0 0 0 0:00:00 Loss of Framing Failures: 0 0 0 0:00:00 Loss of Signal Failures: 0 0 0 0:00:00 Loss of Power Failures: 0 0 0 0:00:00 Loss of Margin Failures: 0 0 0 0:00:00 Cumulative Seconds w/Errors: 4382 987 4 0:00:18 Cumulative Sec. w/Severe Errors: 52 0 0 15:39:42 Corrected Blocks: 0 0 0 0:00:00 Uncorrectable Blocks: 7946 1130 4 0:00:18 DSL Unavailable Seconds: 22 0 0 1 day 12:06:33c

General Information DSL Line (Wire Pair): Line 1 (inner pair) Downstream Rate Cap: 6016 kbps Downstream Atten. at 300kHz: 56.8 dB Uncancelled Echo: -20.7 dB Ok VCXO Frequency Offset: -24.8 ppm Ok Final Rx Gain: 29.9 dB Ok Impulse Noise Comp. Tones: 0 Ok Excessive Impulse Noise: 0 Ok Impulse noise protection: 0.00 Delay of latency path: 0.25 ms Training History Downstream Upstream Time Line Rate Max1 Max2 Max3 Mgn1 Mgn2 Attn Pwr CRCs FECs INP DLY Rate Max Mgn Attn Pwr CRCs FECs Mode Vendor State Exit Code Echo VCXO Rx Gain INC Tones

2008/06/10 22:41:49 EDT 1 3424 3428 3456 5128 6.1 6.0 54.9 18.3 3668 0 0.00 0.25 768 960 12.0 31.5 11.9 26 23 G.DMT Annex A Alcatel 230/105 ERR_LOS_LIMIT -20.8 -24.9 29.9 100 2008/06/10 22:43:24 EDT 1 3264 3264 3296 5088 6.0 6.0 54.9 18.2 3900 0 0.00 0.25 768 956 12.0 31.5 11.9 22 24 G.DMT Annex A Alcatel 230/105 ERR_SIG_INTERRUPT -20.9 -24.2 29.9 106 2008/06/10 22:46:02 EDT 1 3360 3364 3392 5200 6.1 6.0 54.9 18.3 4870 0 0.00 0.25 768 964 12.0 31.5 11.9 27 19 G.DMT Annex A Alcatel 230/105 ERR_LOS_LIMIT -21.0 -23.9 29.9 103 2008/06/10 22:47:36 EDT 1 3264 3280 3312 5168 6.1 6.0 54.9 18.2 3676 0 0.00 0.25 768 956 12.0 31.5 11.9 6 16 G.DMT Annex A Alcatel 230/105 ERR_SIG_INTERRUPT -20.7 -24.1 29.9 106 2008/06/11 00:42:28 EDT 1 3360 3380 5064 5144 6.2 5.0 54.9 18.1 4298 0 0.00 0.25 768 968 12.0 31.5 11.9 17 51 G.DMT Annex A Alcatel 230/105 ERR_SIG_INTERRUPT -20.8 -24.1 29.9 91 2008/06/11 00:44:02 EDT 1 3360 3364 3368 5048 6.1 6.0 54.8 17.9 3980 0 0.00 0.25 768 960 12.0 31.5 11.9 21 18 G.DMT Annex A Alcatel 230/105 ERR_SIG_INTERRUPT -20.9 -24.5 29.9 93 2008/06/11 01:35:13 EDT 1 3168 3196 5024 5128 6.2 16.0 54.8 17.8 5931 0 0.00 0.25 768 956 12.0 31.5 11.9 2 1 G.DMT Annex A Alcatel 230/105 IDLE_REQUEST -20.7 -24.4 29.9 11 2008/06/12 13:47:02 EDT 1 4992 5016 5148 5148 6.2 6.0 54.8 19.2 7964 0 0.00 0.25 768 964 12.0 31.5 11.9 381 2 G.DMT Annex A Alcatel 229/103 N/A -20.7 -24.8 29.9 0 Notes: Time Time of last update Max1 Max. rate at start of connection Max2 Current or final estimated max. rate Max3 Current or final estimated max. rate without INC Mgn1 Noise margin at start of connection Mgn2 Current or final noise margin DLY Delay of latency path Bitloading

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Reply to
Meat Plow

Nice! tracert is very handy, I think I knew about it, then forgot it over the years.

My 2Wire.com results:

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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

Reply to
Dallas

Traceroutes are NOT going to diagnose your problem. One of many reasons is there is not enough data being transferred to place a load on the connection.

Reply to
Meat Plow

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