T3 and T4 timeouts after outage

[carl_pearce]

After a recent outage I've been seeing a lot of T3 and T4 errors.

The below is following a reboot of the HUB (5) two days ago:

https://www.thinkbroadband.com/broadband/monitoring/quality/share/f456cb37eb5964be55ad4b06a2cd7bb860...

The connection itself appears 'ok', however, something is amiss.

Service status shows ok sometimes, and local issues occasionally.

Would be useful to know if VM are are aware and looking into it.

Thanks.

[carl_pearce]

Cable Modem StatusItem Status TypeChannel Overview Downstream Upstream

Cable Modem Status	Online	DOCSIS 3.0
Primary downstream channel	Locked	SC-QAM
DOCSIS 3.0 channels	32	5
DOCSIS 3.1 channels	1	1

3.0 Downstream channels

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

1	355000000	3.3	38	QAM 256	28
2	139000000	4	38	QAM 256	1
3	147000000	4	38	QAM 256	2
4	155000000	4	38	QAM 256	3
5	163000000	3.7	38	QAM 256	4
6	171000000	3.6	38	QAM 256	5
7	179000000	3.4	38	QAM 256	6
8	187000000	3.4	39	QAM 256	7
9	195000000	3.5	39	QAM 256	8
10	203000000	3.3	39	QAM 256	9
11	211000000	3.4	39	QAM 256	10
12	219000000	2.9	39	QAM 256	11
13	227000000	2.7	39	QAM 256	12
14	235000000	2.4	39	QAM 256	13
15	243000000	2	39	QAM 256	14
16	251000000	1.9	39	QAM 256	15
17	259000000	1.6	39	QAM 256	16
18	267000000	1.7	39	QAM 256	17
19	275000000	2.1	39	QAM 256	18
20	283000000	2.3	38	QAM 256	19
21	291000000	2.8	38	QAM 256	20
22	299000000	2.9	38	QAM 256	21
23	307000000	3	38	QAM 256	22
24	315000000	3.2	38	QAM 256	23
25	323000000	3	38	QAM 256	24
26	331000000	3.2	38	QAM 256	25
27	339000000	3.3	38	QAM 256	26
28	347000000	3.3	38	QAM 256	27
29	363000000	2.9	39	QAM 256	29
30	371000000	3.2	39	QAM 256	30
31	379000000	3.1	39	QAM 256	31
32	387000000	3	39	QAM 256	32

3.0 Downstream channels

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

1	Locked	38	594	300
2	Locked	38	633	314
3	Locked	38	667	369
4	Locked	38	610	365
5	Locked	38	619	365
6	Locked	38	602	397
7	Locked	38	562	316
8	Locked	39	575	229
9	Locked	39	550	343
10	Locked	39	535	367
11	Locked	39	512	260
12	Locked	39	503	369
13	Locked	39	499	170
14	Locked	39	517	311
15	Locked	39	584	391
16	Locked	39	534	357
17	Locked	39	516	393
18	Locked	39	535	212
19	Locked	39	527	224
20	Locked	38	565	242
21	Locked	38	656	263
22	Locked	38	660	284
23	Locked	38	683	235
24	Locked	38	653	268
25	Locked	38	686	222
26	Locked	38	673	254
27	Locked	38	701	330
28	Locked	38	678	271
29	Locked	39	553	417
30	Locked	39	496	175
31	Locked	39	531	263
32	Locked	39	483	319

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

38

-1.7

2849530144

39

[carl_pearce]

Network Log

Time Priority Description

12-08-2024 19:04:54	notice	GUI Login Status - Login Success from LAN interface
12-08-2024 17:26:50	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;
12-08-2024 17:26:50	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;
12-08-2024 16:25:17	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;
12-08-2024 16:25:17	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;
12-08-2024 15:15:39	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;
12-08-2024 15:15:39	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;
12-08-2024 15:05:36	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;
12-08-2024 15:05:36	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;
12-08-2024 14:05:06	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;
12-08-2024 14:05:06	warning	Dynamic Range Window violation
12-08-2024 13:44:58	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;
12-08-2024 13:44:58	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;
12-08-2024 13:31:30	critical	16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 13:31:30	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 13:26:30	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 13:24:46	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;
12-08-2024 13:24:46	warning	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 13:24:45	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;
12-08-2024 10:48:22	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 10:45:06	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 10:43:24	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;
12-08-2024 10:43:24	warning	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 10:43:24	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;
12-08-2024 10:37:37	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 10:34:21	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 10:33:19	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;
12-08-2024 10:33:19	warning	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12-08-2024 10:33:19	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;
12-08-2024 10:03:00	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;
12-08-2024 10:03:00	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;
12-08-2024 08:51:56	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;
12-08-2024 08:51:56	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;

[carl_pearce]

3.0 Upstream channels

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

0	49600000	41.8	5120	QAM 64	1
1	43100000	41.5	5120	QAM 64	2
2	36600000	40.5	5120	QAM 64	3
3	30100000	40.3	5120	QAM 64	4
4	23600000	39.8	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	0	0
2	ATDMA	0	0	17	1
3	ATDMA	0	0	32	2
4	ATDMA	0	0	32	2

3.1 Upstream channels

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

6

10

35.7

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

180

9

[Alex_RM]

Hi carl_pearce,

Sorry to see there's been some errors with the hub, I've had a look at things from our side and it looks like we've identified a network issue and a engineer is needed.

I've popped you over a private message to get a few more details from you.

Alex_Rm