Hub 4 Gigabit slow speeds

[Alvydas_M]

Hi, I've got the 1 Gigabit package and my speeds have suddenly dropped I've waited for nearly a week to see if they would go back to normal but they didn't and I've reset the router several times and i also did a factory reset which didn't help at all.

Here is my network status as of writing this

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

[Alvydas_M]

3.0 Downstream channels

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

25	331000000	4.3	39	QAM256	25
1	139000000	5.2	38.6	QAM256	1
2	147000000	5.3	39	QAM256	2
3	155000000	5.1	38.6	QAM256	3
4	163000000	5.3	39	QAM256	4
5	171000000	5.2	38.6	QAM256	5
6	179000000	5.3	39	QAM256	6
7	187000000	5.4	39	QAM256	7
8	195000000	5.5	38.6	QAM256	8
9	203000000	5.5	39	QAM256	9
10	211000000	5.5	38.6	QAM256	10
11	219000000	5.4	39	QAM256	11
12	227000000	5.3	39	QAM256	12
13	235000000	5.2	39	QAM256	13
14	243000000	5	39	QAM256	14
15	251000000	4.9	38.6	QAM256	15
16	259000000	4.7	39	QAM256	16
17	267000000	4.8	39	QAM256	17
18	275000000	4.8	39	QAM256	18
19	283000000	4.6	38.6	QAM256	19
20	291000000	4.5	38.6	QAM256	20
21	299000000	4.2	38.6	QAM256	21
22	307000000	3.9	39	QAM256	22
23	315000000	3.8	39	QAM256	23
24	323000000	3.9	38.6	QAM256	24
26	339000000	4.3	39	QAM256	26
27	347000000	4.4	39	QAM256	27
28	355000000	4.3	39	QAM256	28
29	363000000	4.2	39	QAM256	29
30	371000000	4.4	38.6	QAM256	30
31	379000000	4.3	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	38.605377	0	0
2	Locked	38.983261	0	0
3	Locked	38.605377	0	0
4	Locked	38.983261	0	0
5	Locked	38.605377	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	38.605377	0	0
11	Locked	38.983261	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	38.605377	0	0
20	Locked	38.605377	0	0
21	Locked	38.605377	0	0
22	Locked	38.983261	0	0
23	Locked	38.983261	0	0
24	Locked	38.605377	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

96

4K

1880

QAM1024

424

3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

42

5.7

12226012

0

[Alvydas_M]

3.0 Upstream channels

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

1	39400000	33.5	5120 KSym/sec	64QAM	12
2	46200000	33.5	5120 KSym/sec	64QAM	11
3	53700000	34	5120 KSym/sec	64QAM	10
4	60300000	34	5120 KSym/sec	64QAM	9

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

General Configuration

Network access	true
Maximum Number of CPEs	1
Baseline Privacy	true
DOCSIS Mode	3.1
Config file	kfoA,.iyewrkldJKDHSUBsgvca698

Primary Downstream Service Flow

SFID	23503
Max Traffic Rate	1200000450
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	23500
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 13/03/2022 18:16:50	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sun 13/03/2022 18:29:05	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;

[ozsat]

What have they dropped from and to?

---

@Alvydas_M wrote:

Hi, I've got the 1 Gigabit package and my speeds have suddenly dropped I've waited for nearly a week to see if they would go back to normal but they didn't and I've reset the router several times and i also did a factory reset which didn't help at all.

Here is my network status as of writing this

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

---

[Alvydas_M]

with the googles test it would usually be around 600mb or so now its 14mb at its best and with ookla around 900mb and now its 300mb

[Adduxi]

---

@Alvydas_M wrote:

<snip>

3.1 Downstream channels

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

159

96

4K

1880

QAM1024

424

---

Your 3.1 channel should be QAM 4096.    Looks like the Downstream is the problem?   A VM technician will be need to fix this.

What does www.samknows.com/realspeed show ?

Also setup a BQM to record the state of the circuit.   www.thinkbroadband.com/ping

[Alvydas_M]

SamKnows shows this and ive set up BQM just now

[legacy1]

https://th.bing.com/th/id/R.a84014b981046bb620f1b801ec4e2c88?rik=VLDMd3OYND4%2bhQ&pid=ImgRaw&r=0
real speed vs true speed

[gitty]

To address 1024 vs 4096: Ideally, the operator wants to run 4096-QAM, but that is not always possible. From the numbers and event log entries we've seen here, it is not possible to conclude anytning. If the modem is running stable at 1024-QAM then the real issue lies elsewhere.

[Adduxi]

---

@Alvydas_M wrote:

<snip>   SamKnows shows this and ive set up BQM just now

---

So, you are getting the 1GB to the Hub as far as VM would be concerned.   Are you sure your test kit is gigabit capable?  Have you tried different cables, at least Cat 5e or preferably Cat 6a ?  

Have you tried a full factory reset on the Hub as below.

Remove any ethernet cables from the Hub and hold the pinhole reset switch for 60 seconds. Do NOT reboot the Hub, just let it do it's thing. Note you will need the passwords from the bottom of the Hub afterwards, so make sure they are legible.