Slow Gig 1 broadband...........again

[Stumbler]

Having read scage 's trial and tribulations, whose patience and resilience I admire, it is with some trepidation that I make an almost identical post.

Since upgrading from M600, which gave me a reliable 660mb download, I upgraded to Giganet and a Hub4 and can now manage only 400+mb on a good day.

At the moment, I'm on my 3rd Hub4 and have had three engineers, all doing their best, but without success.

Samknows Real Speed Test shows the Hub receiving 1100/52. Even with a laptop, connected with a cat8 cable as the only device, I can barely obtain a 500mb download speed.

This does seem to be a bit of a regular theme here, so if any learned folks have any thoughts, I'd love to hear them.

Thanks

John

[Stumbler]

Router status

Cable Modem Status

Cable Modem Status	Online	DOCSIS 3.1
Primary downstream channel	Locked	SC-QAM
DOCSIS 3.0 channels	31	4
DOCSIS 3.1 channels	1	0

3.0 Downstream channels

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

25	330750000	3.3	39	QAM256	25
6	178750000	2.3	39	QAM256	6
7	186750000	2.5	39	QAM256	7
8	194750000	2.6	38.6	QAM256	8
9	202750000	2.8	39	QAM256	9
10	210750000	2.6	39	QAM256	10
11	218750000	2.7	40.4	QAM256	11
12	226750000	2.6	39	QAM256	12
13	234750000	2.5	39	QAM256	13
14	242750000	2.4	39	QAM256	14
15	250750000	2.2	38.6	QAM256	15
16	258750000	2.1	39	QAM256	16
17	266750000	1.8	39	QAM256	17
18	274750000	2	39	QAM256	18
19	282750000	2.6	39	QAM256	19
20	290750000	3	39	QAM256	20
21	298750000	3.6	38.6	QAM256	21
22	306750000	3.8	39	QAM256	22
23	314750000	3.9	39	QAM256	23
24	322750000	3.5	39	QAM256	24
26	338750000	3.8	39	QAM256	26
27	346750000	3.7	39	QAM256	27
28	354750000	3.7	39	QAM256	28
29	362750000	3.5	39	QAM256	29
30	370750000	3.7	38.6	QAM256	30
31	378750000	3.5	39	QAM256	31
32	386750000	3.5	39	QAM256	32
33	394750000	3.2	38.6	QAM256	33
34	402750000	3	38.6	QAM256	34
35	410750000	3	40.4	QAM256	35
36	418750000	2.9	39	QAM256	36

3.0 Downstream channels

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

25	Locked	38.983261	0	0
6	Locked	38.983261	0	0
7	Locked	38.983261	0	0
8	Locked	38.605377	0	0
9	Locked	38.983261	0	0
10	Locked	38.983261	0	0
11	Locked	40.366287	0	0
12	Locked	38.983261	0	0
13	Locked	38.983261	0	0
14	Locked	38.983261	0	0
15	Locked	38.605377	0	0
16	Locked	38.983261	0	0
17	Locked	38.983261	0	0
18	Locked	38.983261	0	0
19	Locked	38.983261	0	0
20	Locked	38.983261	0	0
21	Locked	38.605377	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	38.983261	0	0
32	Locked	38.983261	0	0
33	Locked	38.605377	0	0
34	Locked	38.605377	0	0
35	Locked	40.366287	0	0
36	Locked	38.983261	0	0

[Stumbler]

3.1 Downstream channels

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

37

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)

37

Locked

41

2.8

183831441

0

3.0 Upstream channels

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

1	53700000	44	5120 KSym/sec	64QAM	1
2	46200000	43.3	5120 KSym/sec	64QAM	2
3	32600000	44	5120 KSym/sec	64QAM	4
4	39400000	43.8	5120 KSym/sec	64QAM	3

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	1	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

General Configuration

Network access	true
Maximum Number of CPEs	1
Baseline Privacy	true
DOCSIS Mode	3.1
Config file	cmreg-vmdg640-bbt076-b.cm

Primary Downstream Service Flow

SFID	59256
Max Traffic Rate	1230000450
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	59255
Max Traffic Rate	55000270
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	42600
Scheduling Type	bestEffort

Network Log

3.0 Upstream channels

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

1	53700000	44	5120 KSym/sec	64QAM	1
2	46200000	43.3	5120 KSym/sec	64QAM	2
3	32600000	44	5120 KSym/sec	64QAM	4
4	39400000	43.8	5120 KSym/sec	64QAM	3

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	1	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

General Configuration

Network access	true
Maximum Number of CPEs	1
Baseline Privacy	true
DOCSIS Mode	3.1
Config file	cmreg-vmdg640-bbt076-b.cm

Primary Downstream Service Flow

SFID	59256
Max Traffic Rate	1230000450
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	59255
Max Traffic Rate	55000270
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	42600
Scheduling Type	bestEffort

Network Log

Sat 12/02/2022 09:17:08	6	SW Download INIT - Via Config file cmreg-vmdg640-bbt076-b.cm
Sat 12/02/2022 09:18:22	6	SW download Successful - Via Config file
Sat 12/02/2022 09:20:57	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 12/02/2022 09:48:43	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu 01/01/1970 00:01:20	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sat 12/02/2022 10:15:51	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 12/02/2022 11:01:11	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[Stumbler]

 

[Adduxi]

Okay stats are all fine.  Can you setup and share a BQM please?   www.thinkbroadband.com/ping

Also if you are using a Windows device, can you test with a wired connection using "Safe Mode with Networking support" 

As for the Cat 8 cable, that's a bit overkill and sometimes the shielding on these cables can affect the connection in the ethernet ports.  Best to stick to a Cat 6a or even a Cat 5e, both are quite capable of Gigabit speeds.

[Stumbler]

Thanks for your response, Adduxi

I set up a BQM a few days ago:-

BQM Link 

The poor speeds that I've experienced are mainly via a Windows 11 desktop, which was previously getting 660+mb on M600, before I upgraded. So, dropping back to 300mb is disappointing.

I've tried safe mode with networking, as well as wiring up a Windows 10 laptop as the only device attached to the hub, to no avail. Samknows suggests 1100mb to the router but <300mb to the PC.

John

[Adduxi]

---

@Stumbler wrote:

<snip>   a Windows 10 laptop as the only device attached to the hub, to no avail. Samknows suggests 1100mb to the router but <300mb to the PC.  John

---

There is the issue, VM will acknowledge full speed to the Hub.  Not too sure where you will go from here?  If you have a good Cat 6a cable and wired directly to the Hub, there is not much else you can test with.  Strange .....

BTW, the BQM link is not working, I suspect your WAN IP is incorrect ?

[Stumbler]

@Adduxi, thanks for your time on this.

Not sure what happened to the BQM link, but here is a snapshot from Sunday :-

VM's problem management is a disgrace really. They are quick to send an engineer. And, even quicker to close the problem record (if there is one!), whether the issue is resolved or not!

Thanks again.

John

[Stumbler]

Another six weeks have passed and my speeds are yet to improve. If I can hit 250mb download, it's a good day.

I just can't believe that I've gone from the M600 package, reaching speeds of 660mb, to the Gigabit package and getting more than 25%.

My hardware and infrastructure haven't changed. It's just the Hub and the the upgraded package.

So far, I have had three hubs since the upgrade.............

I'm an East End lad, born and bred, so I'm starting to wonder whether "Gigabit" is rhyming slang!

Help!!!!!!!!!!!!!

John

[jbrennand]

Can you humour me and do the speed test exactly like this...
___________________________________________________

Connect a 1GB enabled computer/laptop, with up to date drivers, via a NEW and working Cat5e/6a ethernet cable, directly to the Hub which you have put into “modem mode”

(https://www.virginmedia.com/help/virgin-media-hub-modem-mode ).

This ensures that NO other devices can be connected

Test speeds at https://speedtest.samknows.com/ - try on 2 different browsers.

If they are still low – boot your device into Windows safe+networking mode - to disable any potentially interfering software - and try again.

There are many posts on here (I have a list of ~30!) where QoS software, unknown/flaky software, old network card drivers, corrupted browsers, bad cables or other connected devices are limiting speeds on tests.

Report back what that gets.