Was on Hub3 (500Mb), was great. They upgraded me to 1Gb and sent Hub4 - Lucky if I get 100Mb now!

[RFC1795]

Sorry if this is a long post, I'm trying to provide as much background and info in the hope that someone might help figure out what the issue is here.

As the subject says, I was on a  Hub3 modem, for years prior to that the Hub2/Superhub, I upgraded my package to 500Mbs some time ago, and they sent the Hub 3, which went well, and I was happy with what I was getting.(Around 550Mb down.) Then I got sent a new Hub4 and told I was being upgraded without cost to the 1Gb package. (Note: I have always used modem mode with my own router.)

When I was forced to change to the Hub4 I managed to get around 700Mb for about 2-3 days, then it noped out at around 100 on other days. I did the signed in virginmedia online tests for problems in area/hub. On the various times I did this, at first it mentioned no problem in the area, but on performing the actual test, it said there was a problem in the area and technicians are working hard hat sorting the problem type message. So, I figured I'd just leave it for a while as there might be a problem. It has been weeks now. And today when I ran the same test, it said it looks like I need to reboot the hub, which I've done... and it looks to be even worse now. Currently, 2.9Mbps down, 3.36Mbps up ... see attached image of recent speedtests (Note the 2 at the bottom, this is when I was on my backup 4G connection at the time. I bring up the 4G connection if my main Virgin connection drops.) (I've rebooted the hub 4 so many times already over the past few weeks, including my router.)

I have a 10dB attenuator that they put on my cable line many years ago, I have tried with and without the attenuator attached, with little difference.

My router shows my port speed is currently at 1 Gbps connected to the hub, and I have replaced the ethernet cable during these issues to confirm that wasn't the issue.

Nothing on my LAN side has changed, and I've been doing these tests from my wired laptop all these times in the past. 

I have also run some tests direct from the router CLI:

Xadmin@SynologyRouter:/var$ ./speedtest-cli --server 40788
Retrieving speedtest.net configuration...
Testing from Virgin Media (82.22.X.X)...
Retrieving speedtest.net server list...
Retrieving information for the selected server...
Hosted by Zen Internet (London) [91.67 km]: 39.064 ms
Testing download speed................................................................................
Download: 43.97 Mbit/s
Testing upload speed................................................................................................
Upload: 2.20 Mbit/s
Xadmin@SynologyRouter:/var$ ./speedtest-cli
Retrieving speedtest.net configuration...
Testing from Virgin Media (82.22.X.X)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by NovoServe (Schiphol-Rijk) [425.58 km]: 51.096 ms
Testing download speed................................................................................
Download: 59.17 Mbit/s
Testing upload speed................................................................................................
Upload: 1.97 Mbit/s
Xadmin@SynologyRouter:/var$
Xadmin@SynologyRouter:/var$ ./speedtest-cli
Retrieving speedtest.net configuration...
Testing from Virgin Media (82.22.X.X)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by Broadband 4 the Rural North (Lancaster) [297.18 km]: 51.213 ms
Testing download speed................................................................................
Download: 104.04 Mbit/s
Testing upload speed................................................................................................
Upload: 3.06 Mbit/s
Xadmin@SynologyRouter:/var$

Will post more info as limited to 20K chars

[RFC1795]

I managed to get onto the Hub4 earlier today after a reboot, usually, it just times out to 192.168.100.1, but sometimes I get lucky after a reboot. (Never had this issue with the Hub3)

Anyhow, here's all the information I gathered from the hub now, hopefully means something to someone in the know:

Cable Modem Status
Item	Status	Comments
Cable Modem Status	Online	DOCSIS 3.1
Primary downstream channel	Locked	SC-QAM
Channel Overview	Downstream	Upstream
DOCSIS 3.0 channels	31	5
DOCSIS 3.1 channels	1	1

Refresh data

3.0 Downstream channels

Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
25	330750000	-3.3	39	QAM256	25
1	138750000	-2.5	39	QAM256	1
2	146750000	-2.5	39	QAM256	2
3	154750000	-2.4	38.6	QAM256	3
4	162750000	-2.5	39	QAM256	4
5	170750000	-2.9	39	QAM256	5
6	178750000	-3.1	39	QAM256	6
7	186750000	-3.2	38.6	QAM256	7
8	194750000	-3.4	39	QAM256	8
9	202750000	-3.5	39	QAM256	9
10	210750000	-3.7	39	QAM256	10
11	218750000	-4	39	QAM256	11
12	226750000	-4.5	39	QAM256	12
13	234750000	-4.9	39	QAM256	13
14	242750000	-4.6	38.6	QAM256	14
15	250750000	-3.8	39	QAM256	15
16	258750000	-3.1	39	QAM256	16
17	266750000	-2.8	39	QAM256	17
18	274750000	-2.9	39	QAM256	18
19	282750000	-3.2	40.4	QAM256	19
20	290750000	-3.5	39	QAM256	20
21	298750000	-3.4	39	QAM256	21
22	306750000	-3.3	39	QAM256	22
23	314750000	-3.3	39	QAM256	23
24	322750000	-3.3	39	QAM256	24
26	338750000	-3.4	39	QAM256	26
27	346750000	-3.7	39	QAM256	27
28	354750000	-4.4	39	QAM256	28
29	362750000	-5	39	QAM256	29
30	370750000	-5.4	38.6	QAM256	30
31	378750000	-5.3	38.6	QAM256	31

3.0 Downstream channels

Channel	Lock Status	RxMER (dB)	Pre RS Errors	Post RS Errors
25	Locked	38.983261	0	0
1	Locked	38.983261	0	0
2	Locked	38.983261	0	0
3	Locked	38.605377	0	0
4	Locked	38.983261	0	0
5	Locked	38.983261	0	0
6	Locked	38.983261	0	0
7	Locked	38.605377	0	0
8	Locked	38.983261	0	0
9	Locked	38.983261	0	0
10	Locked	38.983261	0	0
11	Locked	38.983261	0	0
12	Locked	38.983261	0	0
13	Locked	38.983261	0	0
14	Locked	38.605377	0	0
15	Locked	38.983261	0	0
16	Locked	38.983261	0	0
17	Locked	38.983261	0	0
18	Locked	38.983261	0	0
19	Locked	40.366287	0	0
20	Locked	38.983261	0	0
21	Locked	38.983261	0	0
22	Locked	38.983261	0	0
23	Locked	38.983261	0	0
24	Locked	38.983261	0	0
26	Locked	38.983261	0	0
27	Locked	38.983261	0	0
28	Locked	38.983261	0	0
29	Locked	38.983261	0	0
30	Locked	38.605377	0	0
31	Locked	38.605377	0	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	QAM4096	424

3.1 Downstream channels

Channel ID	Lock Status	RxMER Data (dB)	PLC Power (dBmV)	Correcteds (Active Profile)	Uncorrectables (Active Profile)
159	Locked	41	-4.1	16260864	0

[RFC1795]

Refresh data

3.0 Upstream channels

Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	23600000	40.5	5120 KSym/sec	64QAM	5
2	30100000	40.5	5120 KSym/sec	64QAM	4
3	36600000	41	5120 KSym/sec	64QAM	3
4	43100000	40.5	5120 KSym/sec	64QAM	2
5	49600000	41.5	5120 KSym/sec	64QAM	1

3.0 Upstream channels

Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
1	US_TYPE_STDMA	0	0	0	0
2	US_TYPE_STDMA	0	0	0	0
3	US_TYPE_STDMA	0	0	0	0
4	US_TYPE_STDMA	0	0	0	0
5	US_TYPE_STDMA	0	0	0	0

3.1 Upstream channels

Channel	Channel Width (MHz)	Power (dBmV)	FFT Type	Modulation
6	10.0	36.0	2K	QAM8

3.1 Upstream channels

Channel	Channel Type	Number of Active Subcarriers	First Active Subcarrier (Hz)	T3 Timeouts	T4 Timeouts
6	OFDMA	200	53.9	0	0

General Configuration

Network access	true
Maximum Number of CPEs	1
Baseline Privacy	true
DOCSIS Mode	3.1
Config file	54k;fg87dsfd;kfoA,.iyewrkldJK

Primary Downstream Service Flow

SFID	17510
Max Traffic Rate	1200000450
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	17509
Max Traffic Rate	55000270
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	16320
Scheduling Type	bestEffort

Network Log

Time	Priority	Description
Sun 27/11/2022 10:57:54	6	US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: 11.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sun 27/11/2022 18:17:26	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Mon 28/11/2022 07:43:54	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Mon 28/11/2022 08:24:33	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Mon 28/11/2022 09:04:29	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 29/11/2022 00:51:15	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 29/11/2022 01:22:36	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: .;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 29/11/2022 09:49:33	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 29/11/2022 09:49:33	6	DHCP Renew - lease parameters tftp file-cmreg-vmdg640-bbt076+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 29/11/2022 10:57:31	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 29/11/2022 23:07:06	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 29/11/2022 23:37:04	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Wed 30/11/2022 00:02:41	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Wed 30/11/2022 00:38:26	6	US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: .;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/12/2022 15:28:53	6	CM-STATUS message sent. Event Type Code: 5; Chan ID: 12; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/12/2022 15:29:24	3	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/12/2022 15:29:42	6	CM-STATUS message sent. Event Type Code: 5; Chan ID: 12; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/12/2022 16:04:41	6	US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: 11.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 02/12/2022 11:21:00	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 02/12/2022 11:21:00	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 02/12/2022 14:32:49	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 02/12/2022 15:12:23	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 02/12/2022 21:49:34	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 02/12/2022 21:49:34	6	DHCP Renew - lease parameters tftp file-cmreg-vmdg640-bbt076+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 02/12/2022 22:16:02	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sat 03/12/2022 04:07:09	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sat 03/12/2022 04:07:23	5	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;
Sat 03/12/2022 04:07:23	6	US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: 11.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sat 03/12/2022 10:39:35	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sat 03/12/2022 11:40:19	6	US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: 11.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sat 03/12/2022 22:59:05	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sun 04/12/2022 00:46:33	6	US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: 11.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 11:30:00	3	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 11:30:05	5	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 11:30:44	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 11:30:52	6	CM-STATUS message sent. Event Type Code: 4; Chan ID: 4; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 11:37:46	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 12:58:15	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 12:58:15	6	DHCP Renew - lease parameters tftp file-cmreg-vmdg640-bbt076+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 06/12/2022 18:38:02	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Wed 07/12/2022 08:37:17	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Wed 07/12/2022 09:13:20	3	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Wed 07/12/2022 09:13:25	5	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Wed 07/12/2022 09:13:28	3	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

I'm not sure what other information to provide, but if anyone needs more info or has some ideas, then let me know. I'm really not keen to put the Hub back into non-modem mode just to test, as I think everything as it is now, should be getting me upwards of 600Mbps, and connection for work matters, I need to be online.

Thanks for reading if you got this far! 😅

[RFC1795]

UPDATE: Okay, so I decided to let my router run over my backup connection, disconnected ethernet to hub4 and did a factory reset. Connected my laptop to the hub4 using the same cable. Did some tests, and everything was fast as to be expected from 1Gbs service, did the samknows speed tests, everything looked good. I changed hub4 back to modem mode, reconnected everything as before... and, speeds are fine again. I don't get it 🙄 .... hopefully, it stays this way, as when I first got the hub4, it was fast and normal for about 2 days then played up.

If it slows down again, I'll be back to this post, or make a new one.

[legacy1]

Disable any Auto QoS bandwidth detect on your router