Upload speed randomly dips throughout the day

[Kyuu]

Hello,

For the past few months, my upload speed has been fluctuating from its maximum to around 40% of its capacity. This is most impactful during while I am streaming using OBS to YouTube as frame drops occur during this time, though the issue is not YouTube/streaming specific - the bitrate that I stream at (15Mbps) does not approach my expected maximum either (100Mbps).

I recently upgraded my package to Gig1 and replaced the Hub3 with a Hub5, but the problem still persists. There doesn't seem to be a specific cause, and my download speed remains stable during these periods.

Wondering if I could get support in this matter.

Here is a link to a live BQM (EDIT: Updated since going to router mode gave me a new IP):

https://www.thinkbroadband.com/broadband/monitoring/quality/share/aff97055f476476894b35dbdaf4bf837c2...

Posting network status data from my Hub5 in the next post.

[Kyuu]

Downstream

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1	331000000	6.1	41	QAM 256	25
2	139000000	8.6	41	QAM 256	1
3	147000000	8.6	41	QAM 256	2
4	155000000	8.6	41	QAM 256	3
5	163000000	8.2	41	QAM 256	4
6	171000000	7.9	41	QAM 256	5
7	179000000	7.9	41	QAM 256	6
8	187000000	8.1	42	QAM 256	7
9	195000000	8.1	42	QAM 256	8
10	203000000	7.8	42	QAM 256	9
11	211000000	7.8	42	QAM 256	10
12	219000000	7.7	42	QAM 256	11
13	227000000	7.6	41	QAM 256	12
14	235000000	7.5	42	QAM 256	13
15	243000000	7.2	41	QAM 256	14
16	251000000	6.9	42	QAM 256	15
17	259000000	7.1	42	QAM 256	16
18	267000000	7.5	42	QAM 256	17
19	275000000	7.8	42	QAM 256	18
20	283000000	7.9	42	QAM 256	19
21	291000000	7.9	42	QAM 256	20
22	299000000	7.7	42	QAM 256	21
23	307000000	7.5	41	QAM 256	22
24	315000000	7	41	QAM 256	23
25	323000000	6.5	41	QAM 256	24
26	339000000	5.9	41	QAM 256	26
27	347000000	6	41	QAM 256	27
28	355000000	5.8	41	QAM 256	28
29	363000000	6.1	41	QAM 256	29
30	371000000	6.2	42	QAM 256	30
31	379000000	6.1	42	QAM 256	31
32	387000000	6.3	42	QAM 256	32

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1	Locked	41	15	0
2	Locked	41	28	0
3	Locked	41	38	0
4	Locked	41	35	0
5	Locked	41	28	0
6	Locked	41	25	0
7	Locked	41	28	0
8	Locked	42	24	0
9	Locked	42	19	0
10	Locked	42	16	0
11	Locked	42	21	0
12	Locked	42	26	0
13	Locked	41	15	0
14	Locked	42	16	0
15	Locked	41	19	0
16	Locked	42	24	0
17	Locked	42	17	0
18	Locked	42	18	0
19	Locked	42	37	0
20	Locked	42	39	0
21	Locked	42	42	0
22	Locked	42	44	3
23	Locked	41	33	0
24	Locked	41	32	0
25	Locked	41	24	0
26	Locked	41	11	0
27	Locked	41	6	0
28	Locked	41	7	0
29	Locked	41	22	0
30	Locked	42	18	0
31	Locked	42	24	0
32	Locked	42	16	0

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

159

94

4K

1840

QAM 4096

1108

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)

159

Locked

43

6.8

1409559103

0

Upstream

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

0	49600000	42.8	5120	QAM 64	1
1	43100000	42.8	5120	QAM 64	2
2	36600000	42.3	5120	QAM 64	3
3	30100000	42	5120	QAM 64	4
4	23600000	42	5120	QAM 64	5

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

0	ATDMA	0	0	0	0
1	ATDMA	0	0	3	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	2	0
4	ATDMA	0	0	0	0

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation

6

10

36.5

2K

QAM 256

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts

6

OFDMA

200

74000000

0

0

 

[Kyuu]

Configuration

General Configuration

Network accessMaximum Number of CPEsBaseline PrivacyDOCSIS ModeConfig file

Allowed

3

Enabled

3.1

dJKDHSUBsgvca69834ncxv9873254

Primary Downstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic RateSFIDMax Traffic RateMax Traffic BurstMin Traffic Rate

5358

1200000450 bps

42600bytes

0 bps

5384

128000 bps

4000bytes

0 bps

Primary Upstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic RateMax Concatenated BurstScheduling TypeSFIDMax Traffic RateMax Traffic BurstMin Traffic RateMax Concatenated BurstScheduling Type

3322

128000 bps

4000bytes

0 bps

1522bytes

Best Effort

5372

110000274 bps

42600bytes

0 bps

42600bytes

Best Effort

Network Log

Network Log

Time Priority Description

20-05-2024 09:06:18	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-05-2024 09:06:18	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-05-2024 04:33:53	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-05-2024 04:33:53	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-05-2024 04:23:48	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-05-2024 04:23:48	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-05-2024 04:13:42	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-05-2024 04:13:42	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
19-05-2024 02:20:44	notice	GUI Login Status - Login Success from LAN interface
19-05-2024 00:22:50	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 23:59:02	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 23:59:02	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 23:48:54	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 23:48:54	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 21:10:35	notice	GUI Login Status - Login Success from LAN interface
18-05-2024 15:04:49	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 15:04:49	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 14:54:44	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 14:54:44	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 09:31:43	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 09:31:43	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 08:59:37	notice	GUI Login Status - Login Success from LAN interface
18-05-2024 08:25:34	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 08:25:34	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 08:21:16	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 08:21:16	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 08:01:06	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-05-2024 08:01:06	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-05-2024 22:22:58	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-05-2024 20:02:10	notice	GUI Login Status - Login Success from LAN interface
17-05-2024 18:43:18	notice	GUI Login Status - Login Success from LAN interface
17-05-2024 18:15:49	notice	GUI Login Status - Login Success from LAN interface
17-05-2024 17:44:36	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-05-2024 17:44:36	warning	DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-05-2024 17:44:32	notice	REGISTRATION COMPLETE - Waiting for Operational status
17-05-2024 17:44:32	warning	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-05-2024 17:43:38	warning	Dynamic Range Window violation
17-05-2024 17:43:38	warning	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[smithy01793]

My upload speed has dropped by like 70% ish over the last 5 days or so. On a 1gig connection gone from 110-100meg upload to 30-35meg also not only that the packat loss is terrible as well now since this started. 

[Kyuu]

Wanted to bump this with the fact that this issue still occurs in router mode, and regardless of the Ethernet cables I use to connect my devices to the Hub, so it is not an issue with my usual setup.

[Kyuu]

Since going back to Modem Mode returns my previous IP (and I can no longer edit the original post), here's the link for my BQM while in Modem Mode:

https://www.thinkbroadband.com/broadband/monitoring/quality/share/aff97055f476476894b35dbdaf4bf837c2...

[Sabrina_B]

Hi @Kyuu 👋.

Thanks for reaching out to us, and welcome to the Community Forums, apologies for the issues you are having with your internet service. So that we can assist you, we would need to bring you in for a private message. Please look out for the envelope on the top right of your web browser or if you are using a mobile device, it will be located under your profile icon.
 

Thanks.
 

Sabrina

[Kyuu]

Wanted to update this to indicate that my issues still persist. I had the technician come and replace the Hub and to place my connection on a different tab. He scheduled another appointment for me, which didn't result in anything productive, as the connection issues were not occurring at that moment. I was told my power levels were in spec.

To be clear, this happens regardless of my setup and on every device when the dips occur, which tend to occur during late hours (~10PM-8AM?), but aren't necessarily constrained to those hours. This is problematic for my use case.

I was told by the second technician to send screenshots of my upload speed during these periods to the first so a repull could be arranged. The first engineer never ended up responding to me, so I'm posting them here instead.

This is my upload speed during these periods:
https://www.speedtest.net/result/16490962986


These are network stats from OBS from when these dips occur. These sets of streams were on Router Mode with the PC and the Hub being directly connected with Ethernet.


I really would like to get this resolved.

[Kyuu]

Seems that there's an area fault. My upstream channels are dropping to 32QAM as a result. Hopefully when this is resolved it will resolve my issue, but we'll just have to see I guess.

[Daniel_Et]

Hi @Kyuu, thank you for your posts.

We're sorry to hear that the issues are persisting 😔

If, by any chance, you're no further forward once the area fault has been fixed, please let us know.

You can check your service status by clicking here. 

Regards,
Daniel