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Upload speeds are Throttling?

New Poster

Upload speeds are Throttling?

Hello,

 

I have been doing video streaming (uploading) for several years now on and off and have ran into various issues from different sides of spectrum. My latest issue with trying to stream to services to Twitch or Mixer is that I believe my upload speed is being throttled or there is a auto negotiation issue happening. I essentially have to upload my max used bitrate of choice (usually around 3500 and I get 5000 max for my plan) for around 30 minutes to 1 hour before my upload speed stabilizes. During this time I can't connect to any multiplayer service for games due to server disconnects. Once the upload speeds stabalizes after the 30 minutes to an hour, I get normal or slightly higher pings than normal and my streaming is fine. What can cause this issue to wait so long to get my provided upload speed? Am I actually being forced 2Mbps until I start to push the threshold and I have to wait to get my 5Mbps? Is this a hardware issue?

 

Upstream
Channel Bonding Value
Index
1
2
3
4
5
6
7
8
Lock Status
Locked
Locked
Locked
Locked
Not Locked
Not Locked
Not Locked
Not Locked
Frequency
17.30 MHz
36.70 MHz
30.30 MHz
23.70 MHz
       
Symbol Rate
5120 KSym/s
5120 KSym/s
5120 KSym/s
5120 KSym/s
       
Power Level
53.00 dBmV
52.00 dBmV
52.00 dBmV
52.50 dBmV
       
Modulation
64 QAM
64 QAM
64 QAM
64 QAM
       
Channel Type
DOCSIS2.0 (ATDMA)
DOCSIS2.0 (ATDMA)
DOCSIS2.0 (ATDMA)
DOCSIS2.0 (ATDMA)

 

I've in the past had technicians come and just replace splitters or do something to the pole. But I don't beleive this to be a hardware issue on my end but some sort of neighborhood throttle.

 

Thank you for the replies or questions.

Expert

Re: Upload speeds are Throttling?

The upstream power is too high. Can you please also post the downstream power levels and the SNR figures.

New Poster

Re: Upload speeds are Throttling?

Downstream
Channel Bonding Value
Index
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Not Locked
Not Locked
Not Locked
Not Locked
Not Locked
Not Locked
Not Locked
Not Locked
Frequency
483.00 MHz
489.00 MHz
519.00 MHz
525.00 MHz
531.00 MHz
543.00 MHz
549.00 MHz
561.00 MHz
567.00 MHz
573.00 MHz
579.00 MHz
585.00 MHz
591.00 MHz
597.00 MHz
603.00 MHz
609.00 MHz
615.00 MHz
621.00 MHz
627.00 MHz
633.00 MHz
639.00 MHz
645.00 MHz
651.00 MHz
657.00 MHz
               
SNR
40.37 dB
40.37 dB
40.37 dB
40.37 dB
38.98 dB
40.95 dB
38.98 dB
38.98 dB
40.37 dB
40.37 dB
40.95 dB
38.98 dB
36.61 dB
36.61 dB
35.78 dB
37.36 dB
38.98 dB
37.64 dB
40.95 dB
38.61 dB
38.61 dB
38.61 dB
38.61 dB
38.61 dB
               
Power Level
-1.10 dBmV
-1.20 dBmV
-1.90 dBmV
-1.60 dBmV
-1.90 dBmV
-1.70 dBmV
-1.80 dBmV
-1.20 dBmV
-1.50 dBmV
-1.40 dBmV
-1.40 dBmV
-2.20 dBmV
-3.60 dBmV
-5.10 dBmV
-4.20 dBmV
-3.00 dBmV
-2.30 dBmV
-1.90 dBmV
-0.80 dBmV
-0.60 dBmV
-1.30 dBmV
-2.70 dBmV
-2.00 dBmV
-1.40 dBmV
               
Modulation
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
               

 

CM Error Codewords
Unerrored Codewords
2232275374
1649139263
2232286487
2232297491
2232298981
2232271184
2232289764
2161949947
1410101266
1022510210
677935552
3834551849
3148568652
3249637278
814217954
2232208965
2232285609
2232291394
2232299937
2232282020
2232279375
403429371
980459127
2232314276
0
0
0
0
0
0
0
0
Correctable Codewords
1138
499
944
1646
5628
15816
18272
27713
65152
132231
53438
131939
241243
196567
144145
64642
16707
6729
2469
1263
8326
28383
48332
9991
0
0
0
0
0
0
0
0
Uncorrectable Codewords
0
2346
0
0
0
170
269
4683
10935
39256
105199
135749
114360
147285
117677
30585
20735
2836
186
0
38854
20622
26277
6561
0
0
0
0
0
0
0
0
Expert

Re: Upload speeds are Throttling?

O/k those are o/k. In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.


New Poster

Re: Upload speeds are Throttling?

Thank you for replying again.

 

As I said, the last time the tech came out here he replaced the splitter with (pic related) which falls into the requirements. This is the only splitter that runs between my modem and my cable box (which I don't even use). But something like this can't possibly cause stability issues that work after 30 minutes to an hour and doesn't drop unless I restart the stream and have to wait for another 30 minutes to hour, could it?

 

test.jpg

Expert

Re: Upload speeds are Throttling?

Sure it can. With the way that the TCP protocol works, If there is an upstream impairment, the downstream will be affected. Get the techs back out there and show them this thread / the upstream power. Good luck !

Expert

Re: Upload speeds are Throttling?

Hi @reaply

Thank you for visiting the forums! Sorry to hear about your issues. 

I've asked an employee to check the CMTS for real-time and historical RF signal reports from your modem. They can also check your local node/plant for any degradation or error reports. You can expect a reply in this thread. 

 

"Keepin' it clean since '09" --I am not a Comcast employee.
Official Employee

Re: Upload speeds are Throttling?

Hi reaply. I can assist with further troubleshooting your upload speed issues. As nerdburg stated, I'd like to start with performing the diagnostic tests. Please send me a private message and include your full name and account primary phone number so I can access your equipment.

New Poster

Re: Upload speeds are Throttling?

Thank you nerdburg, it's very much appreciated what you did. Smiley Happy I sent Joe a PM.