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Cable Modem Testing


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11 replies to this topic

#1 shadowpuck

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Posted 08 March 2011 - 09:11 PM

I hope everyone doesn't mind my first post being a request for assistance/interpretation of results.

I've been using testmy.net for a while now and always had accurate results.

All of a sudden, however, I'm getting some bizarre results.
My ISP, of course, has been helpless.

I'll save the editorial and just post up the data.

This all started late last week. I randomly ran a speed test and noticed that my speed was way off from where it normally is.
Here's a shot of what I'm used to seeing:
Posted Image

Here's a recent test result from testmy.net:
Posted Image

Even allowing for time of day/network congestion, that seems way off.

Another testing site (speedtest.net) going to Dallas.
Posted Image

Again, another recent test on testmy.net
Posted Image

The results seem to be rather erratic.

Just for comparison, since I also have a DSL connection, I tested it.

testmy.net - a few moments ago:
Posted Image

The results with my DSL connection are almost identical no matter what test site/location I use.

Do I simply have to live with the fluctuation on the cable modem? Anything I can do? Should I call my ISP again and ask them for assistance?

#2 xs1

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Posted 09 March 2011 - 05:57 AM

Have you tried power cycling the modem for roughly 3 minutes? It may be a bad config push. If that doesn't help than yes, I would call The isp bcause it may be node congestion which they deal with on their end.
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#3 shadowpuck

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Posted 09 March 2011 - 06:16 AM

i have tried power cycling it for about 30 seconds.
i can try a longer interval.

#4 Buntz

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Posted 09 March 2011 - 06:52 AM

Do you have any splitters in the cable lines? Try bypassing them and see what you get. Power cycle the router too if you have one.
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#5 CA3LE

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Posted 09 March 2011 - 11:46 AM

shadowpuck, I'd recommend first that you run the Scheduled Speed Test on a low interval, 30 minutes to 1 hour for instance. Let that run for a day or so and that will give us better data to work with.

Many times it boils down to net congestion. Just because you tested elsewhere during the same time and got better results doesn't really mean anything. First, your route here will undoubtedly be different than another server, even in the same city... and second, because TestMy.net is far different than other tests out there. I have purposely made the tests here more resource intensive, so other problems with your computer could be to blame. But, running that scheduled test will help place the blame outside of your home.

... If we figure out that it's only happening during certain times you can then take that information to your ISP and hopefully they can figure out what the issue is.

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#6 shadowpuck

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Posted 09 March 2011 - 07:09 PM

thank you for the suggestions; i will arrange for the hourly test and then report back on my stats.. i do suspect net congestion, just seems odd that (unless its ISP specific) I'm not seeing the same congestion on my DSL connection. I also haven't had any problems until just recently. Thus, my puzzlement.

We'll figure it out - I'll report back when I have more data.....

#7 shadowpuck

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Posted 09 March 2011 - 08:02 PM

forgot to answer the other question.
to my knowledge there are no splitters in the system.
i believe the connection for the cable modem is going directly from outside to the modem. i do not have cable tv or anything else and i know they installed a drop for the modem because i was here when they did it.

i just logged into the cable modem and here's what it shows:


Downstream Value
Frequency 591000000 Hz

Signal To Noise Ratio 41.4 dB

Power Level 12.4 dBmV


Upstream Value
Channel ID 3
Frequency 29000000 Hz
Power 40.2 dBmV

not sure if that tells us anything or not. i'll start the hourly test later tonight....

#8 TriRan

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Posted 10 March 2011 - 12:05 AM

modem.jpg

thats my modem pages stats i think yours are well within range

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#9 shadowpuck

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Posted 10 March 2011 - 10:32 PM

just finished the full day of hourly tests.....

general trend for both down and up speeds is a general slowdown around 8pm then nearly doubling in speed after midnight.
speeds continue consistently fast until about 9am then start dropping off.
very slow speeds noted around 2-3pm unil about 9-10pm again.

all times central.

Date Type Test Score ISP / Host Server Location Test ID


Thu Mar 10 2011 @ 9:43:32 pm DN 3229 kbps - (394 kB/s) npgco.com TX 6LNiSj
Thu Mar 10 2011 @ 8:43:39 pm DN 1776 kbps - (217 kB/s) npgco.com TX VUIQEY
Thu Mar 10 2011 @ 7:43:16 pm DN 1472 kbps - (180 kB/s) npgco.com TX 9StUZc
Thu Mar 10 2011 @ 6:43:12 pm DN 1605 kbps - (196 kB/s) npgco.com TX uRcTlV
Thu Mar 10 2011 @ 5:43:21 pm DN 2026 kbps - (247 kB/s) npgco.com TX GfAJSu
Thu Mar 10 2011 @ 4:42:51 pm DN 4899 kbps - (598 kB/s) npgco.com TX e5qDf0
Thu Mar 10 2011 @ 3:42:48 pm DN 3443 kbps - (420 kB/s) npgco.com TX TYN9jL
Thu Mar 10 2011 @ 2:42:47 pm DN 2716 kbps - (332 kB/s) npgco.com TX NLlVs5
Thu Mar 10 2011 @ 1:42:40 pm DN 6912 kbps - (844 kB/s) npgco.com TX gN0cQK
Thu Mar 10 2011 @ 12:42:50 pm DN 6560 kbps - (801 kB/s) npgco.com TX 0HNjAI
Thu Mar 10 2011 @ 11:42:36 am DN 7855 kbps - (959 kB/s) npgco.com TX NAkQmi
Thu Mar 10 2011 @ 10:42:43 am DN 7427 kbps - (907 kB/s) npgco.com TX PqkwH1
Thu Mar 10 2011 @ 9:42:40 am DN 7659 kbps - (935 kB/s) npgco.com TX NTDU9G
Thu Mar 10 2011 @ 8:42:42 am DN 10050 kbps - (1227 kB/s) npgco.com TX PjSeOv
Thu Mar 10 2011 @ 7:42:33 am DN 10583 kbps - (1292 kB/s) npgco.com TX zN1HP2
Thu Mar 10 2011 @ 6:42:34 am DN 14043 kbps - (1714 kB/s) npgco.com TX CIXFYW
Thu Mar 10 2011 @ 5:42:36 am DN 11396 kbps - (1391 kB/s) npgco.com TX EkNCa9
Thu Mar 10 2011 @ 4:42:30 am DN 14166 kbps - (1729 kB/s) npgco.com TX 3r2fPc
Thu Mar 10 2011 @ 3:42:28 am DN 14171 kbps - (1730 kB/s) npgco.com TX bRTlcU
Thu Mar 10 2011 @ 2:42:27 am DN 14163 kbps - (1729 kB/s) npgco.com TX OfLSXJ
Thu Mar 10 2011 @ 1:42:26 am DN 13924 kbps - (1700 kB/s) npgco.com TX Pt3pnm
Thu Mar 10 2011 @ 12:42:44 am DN 12892 kbps - (1574 kB/s) npgco.com TX TzSktg
Wed Mar 09 2011 @ 11:42:29 pm DN 7006 kbps - (855 kB/s) npgco.com TX ngXoVN
Wed Mar 09 2011 @ 10:42:31 pm DN 6083 kbps - (743 kB/s) npgco.com TX ElC92h
Wed Mar 09 2011 @ 9:42:15 pm DN 793 kbps - (97 kB/s) npgco.com TX GY8UAX
Wed Mar 09 2011 @ 8:41:58 pm DN 665 kbps - (81 kB/s) npgco.com TX geiJQC

Date Type Test Score ISP / Host Server Location Test ID


Thu Mar 10 2011 @ 9:44:06 pm UP 556 kbps - (68 kB/s) npgco.com TX dcZvGb
Thu Mar 10 2011 @ 8:44:17 pm UP 494 kbps - (60 kB/s) npgco.com TX AEIhT4
Thu Mar 10 2011 @ 7:43:51 pm UP 655 kbps - (80 kB/s) npgco.com TX PHn9EA
Thu Mar 10 2011 @ 6:43:47 pm UP 545 kbps - (67 kB/s) npgco.com TX TzmG2h
Thu Mar 10 2011 @ 5:43:55 pm UP 647 kbps - (79 kB/s) npgco.com TX zvNsRk
Thu Mar 10 2011 @ 4:43:20 pm UP 588 kbps - (72 kB/s) npgco.com TX nk5wXJ
Thu Mar 10 2011 @ 3:43:18 pm UP 571 kbps - (70 kB/s) npgco.com TX gpoNqU
Thu Mar 10 2011 @ 2:43:25 pm UP 480 kbps - (59 kB/s) npgco.com TX 3zEr9O
Thu Mar 10 2011 @ 1:43:04 pm UP 777 kbps - (95 kB/s) npgco.com TX ZHwWB1
Thu Mar 10 2011 @ 12:43:14 pm UP 720 kbps - (88 kB/s) npgco.com TX vpwFPC
Thu Mar 10 2011 @ 11:42:59 am UP 793 kbps - (97 kB/s) npgco.com TX Ss7qj2
Thu Mar 10 2011 @ 10:43:04 am UP 909 kbps - (111 kB/s) npgco.com TX jpT1Pe
Thu Mar 10 2011 @ 9:43:07 am UP 609 kbps - (74 kB/s) npgco.com TX a5B39K
Thu Mar 10 2011 @ 8:43:05 am UP 767 kbps - (94 kB/s) npgco.com TX ct7Uhj
Thu Mar 10 2011 @ 7:42:57 am UP 717 kbps - (88 kB/s) npgco.com TX H9PcSE
Thu Mar 10 2011 @ 6:42:55 am UP 910 kbps - (111 kB/s) npgco.com TX Hcfqd0
Thu Mar 10 2011 @ 5:43:01 am UP 682 kbps - (83 kB/s) npgco.com TX EZiUTp
Thu Mar 10 2011 @ 4:42:49 am UP 1001 kbps - (122 kB/s) npgco.com TX mnLUsF
Thu Mar 10 2011 @ 3:42:47 am UP 1000 kbps - (122 kB/s) npgco.com TX 4bNoDH
Thu Mar 10 2011 @ 2:42:45 am UP 1030 kbps - (126 kB/s) npgco.com TX SGaiZs
Thu Mar 10 2011 @ 1:42:47 am UP 936 kbps - (114 kB/s) npgco.com TX yU2j6l
Thu Mar 10 2011 @ 12:43:05 am UP 953 kbps - (116 kB/s) npgco.com TX PdWYFI
Wed Mar 09 2011 @ 11:42:50 pm UP 858 kbps - (105 kB/s) npgco.com TX cDBa7N
Wed Mar 09 2011 @ 10:42:53 pm UP 834 kbps - (102 kB/s) npgco.com TX v3w4me
Wed Mar 09 2011 @ 9:42:59 pm UP 592 kbps - (72 kB/s) npgco.com TX pbrXQd
Wed Mar 09 2011 @ 8:42:43 pm UP 663 kbps - (81 kB/s) npgco.com TX 6Wg7lA

#10 xs1

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Posted 11 March 2011 - 05:54 AM

I would defiantly say an overloaded node. That's exactly what mine looked like in Iowa. Speeds were good than as the day went on got progressively worse ; especially @ night. almost unusable. Id call the ISP ask them about it.
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#11 shadowpuck

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Posted 11 March 2011 - 09:54 AM

i've created a graph of the download test results.......

i'll contact my ISP and report back on what they say...

Attached Files



#12 TriRan

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Posted 11 March 2011 - 04:33 PM

don't let them try to say it's the site that's overloaded lol just tested at 46Mbps

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