Massive Pre and Post RS errors

[Peav]

Hi VM,

Can you run a line test on my connection? We've had issues with the line for a year or so now, since a neighbour had VM installed. These are the current line stats since I last rebooted the modem on Monday 25th October:

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

1	163000000	0.3	39	QAM 256	4
2	139000000	1.3	35	QAM 256	1
3	155000000	0.4	40	QAM 256	3
4	171000000	0.6	40	QAM 256	5
5	179000000	0.9	35	QAM 256	6
6	187000000	0.5	39	QAM 256	7
7	195000000	0	39	QAM 256	8
8	203000000	0.9	35	QAM 256	9
9	211000000	0	39	QAM 256	10
10	227000000	1	38	QAM 256	12
11	235000000	1.4	41	QAM 256	13
12	259000000	0.5	41	QAM 256	16
13	267000000	1.2	41	QAM 256	17
14	291000000	1.6	41	QAM 256	20
15	299000000	0.9	41	QAM 256	21
16	323000000	0.7	39	QAM 256	24
17	339000000	-1.3	39	QAM 256	26
18	355000000	0.8	40	QAM 256	28
19	363000000	0.3	40	QAM 256	29
20	387000000	0.9	41	QAM 256	32
21	419000000	0.8	40	QAM 256	36
22	427000000	0.7	41	QAM 256	37
23	451000000	0.5	41	QAM 256	40
24	459000000	0.5	41	QAM 256	41
25	467000000	0	41	QAM 256	42
26	475000000	0.3	41	QAM 256	43
27	483000000	0.3	40	QAM 256	44
28	491000000	0.1	40	QAM 256	45
29	499000000	0.1	41	QAM 256	46
30	507000000	0.2	41	QAM 256	47
31	515000000	0.2	40	QAM 256	48

3.0 Downstream channels

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

1	Locked	39	486955	228556
2	Locked	35	212151	24361
3	Locked	40	159612	10005
4	Locked	40	159010	12368
5	Locked	35	387266	18468
6	Locked	39	369112	16164
7	Locked	39	296053	12710
8	Locked	35	1755379	11705
9	Locked	39	182049	5319
10	Locked	38	84621	2864
11	Locked	41	93402	2167
12	Locked	41	86018	1886
13	Locked	41	152564	1670
14	Locked	41	16852	616
15	Locked	41	11806	265
16	Locked	39	23283	1137
17	Locked	39	16943	838
18	Locked	40	15052	593
19	Locked	40	14038	521
20	Locked	41	5345	66
21	Locked	40	6567	96
22	Locked	41	27004	2419
23	Locked	41	7306	175
24	Locked	41	6146	14
25	Locked	41	4982	1
26	Locked	41	5039	5
27	Locked	40	5454	11
28	Locked	40	5055	0
29	Locked	41	3831	0
30	Locked	41	3161	0
31	Locked	40	3147	0

I run the hub in modem mode, connected to an Opnsense Firewall box and the speed test results connected via the 2,5gb ports look like this:

Timestamp (GMT) Server id Server name Download Upload Latency

2024-11-02T11:20:32	4058	Wildcard Networks, Newcastle upon Tyne	42.63	90.07	30.22
2024-11-02T11:11:10	4058	Wildcard Networks, Newcastle upon Tyne	2.55	86.56	94.70
2024-11-02T11:08:30	25646	Odyssey Systems Limited, Stockton-on-Tees	4.93	99.19	75.07
2024-10-25T12:14:30	4058	Wildcard Networks, Newcastle upon Tyne	1142.55	103.61	27.95
2024-10-25T12:08:20	4058	Wildcard Networks, Newcastle upon Tyne	44.08	89.36	28.13
2024-10-25T11:57:01	63731	Virgin Media, London	9.63	85.74	27.99
2024-10-25T11:22:37	63731	Virgin Media, London	38.03	91.46	27.83
2024-10-14T20:25:42	25646	Odyssey Systems Limited, Stockton-on-Tees	1111.45	98.48	23.97
2024-10-14T18:51:59	25646	Odyssey Systems Limited, Stockton-on-Tees	40.90	94.86	24.55
2024-10-14T18:51:06	63731	Virgin Media, London	42.10	79.15	26.53
2024-10-14T09:06:16	4058	Wildcard Networks, Newcastle upon Tyne	43.92	90.99	27.97
2024-10-14T08:43:43	4058	Wildcard Networks, Newcastle upon Tyne	43.92	104.32	28.00
2024-10-14T07:59:40	17449	razorblue, Leeds	3.34	103.31	83.18

I don't have an omnibox setup on the house as the incoming cable runs into a rediffusion box built into the wall. The drop from the tap point to the house is most likely the original cable from when blueyonder were doing the installs around 20+ years ago.

Thanks.

Peav

[Tudor]

Does not look good, but must also have the upstream and hub log.

[Peav]

Upload stats: These look ok. and speeds are always 90-100mbit

3.0 Upstream channels

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

0	49600000	46.5	5120	QAM 64	9
1	43100000	46.8	5120	QAM 64	10
2	36600000	47.5	5120	QAM 64	11
3	30100000	48.5	5120	QAM 64	12
4	23600000	47.5	5120	QAM 64	13

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	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	1
4	ATDMA	0	0	20	1

3.1 Upstream channels

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

14

10

41.0

2K

QAM 256

3.1 Upstream channels

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

14

OFDMA

200

74000000

0

0

[Peav]

Network Log

Time Priority Description

02-11-2024 15:21:52	notice	CM-STATUS message sent. Event Type Code: 22; Chan ID: 159; 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;
02-11-2024 15:15:38	notice	CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; 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;
02-11-2024 15:12:53	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 15:07:26	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 15:03:33	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 14:58:12	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 14:49:56	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 14:46:39	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 14:42:02	notice	CM-STATUS message sent. Event Type Code: 5; Chan ID: 3; 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;
02-11-2024 14:42:02	notice	CM-STATUS message sent. Event Type Code: 2; Chan ID: 33; 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;
02-11-2024 14:36:12	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 14:24:53	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 14:22:55	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:57:38	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:55:12	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:50:15	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:48:49	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:38:07	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:35:00	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:24:13	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:21:49	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:18:15	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:08:23	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:02:13	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 13:01:51	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 12:59:33	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 12:55:32	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 12:50:20	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 12:35:54	notice	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
02-11-2024 12:33:24	notice	CM-STATUS message sent. Event Type Code: 22; Chan ID: 159; 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;
02-11-2024 12:30:48	notice	CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; 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;
02-11-2024 12:17:07	notice	CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[Tudor]

I think you possibly need a technician’s visit, but first check all cables are tight.

[Peav]

Thanks Tudor,

I doubled checked the connections were tight on the 25th. Speeds from over the weekend in the screen below - going from 1gbit to 40mbit.

[chris_s]

Is your cable a single run from the wall box into the cable modem or do you have two with a joiner? I was getting lots of pre and post RS errors until I removed the joiner and used a single piece of coax from the wall to the modem, now I hardly have any pre and no post at all.

[Peav]

Its a single run from the isolator outside to the modem.

[Matthew_ML]

Hey Peav, thank you for reaching out and I am so sorry you are having some connection issues.

Let me send you a PM over and we will look into this.