Can anyone spot any issues with this?

[richardmc85]

Specifically interested to understand if my kit is at fault, or if this is related to an ongoing fault.

Query because the Hub 4 keeps essentially disconnecting/reconnecting every 15 minutes - like clockwork. Note the timestamps may be wrong as I have already force reset the Hub 4. I am running in Modem mode.

Cable Modem StatusItem Status CommentsChannel Overview Downstream Upstream

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

[richardmc85]

3.0 Downstream channels

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

25	331000000	0.9	37.6	QAM256	25
1	139000000	4	37.6	QAM256	1
2	147000000	4	37.6	QAM256	2
3	155000000	3.5	37.6	QAM256	3
4	163000000	4	38.6	QAM256	4
5	171000000	3.9	38.6	QAM256	5
6	179000000	3.3	37.6	QAM256	6
7	187000000	3.6	38.6	QAM256	7
8	195000000	3.3	37.6	QAM256	8
9	203000000	3.1	37.6	QAM256	9
10	211000000	3.5	38.6	QAM256	10
11	219000000	3.2	39	QAM256	11
12	227000000	2.8	39	QAM256	12
13	235000000	3.3	38.6	QAM256	13
14	243000000	2.9	38.6	QAM256	14
15	251000000	2.7	37.6	QAM256	15
16	259000000	2.9	38.6	QAM256	16
17	267000000	2.6	38.6	QAM256	17
18	275000000	2.6	38.6	QAM256	18
19	283000000	3	38.6	QAM256	19
20	291000000	2.2	37.6	QAM256	20
21	299000000	1.3	37.6	QAM256	21
22	307000000	1.4	39	QAM256	22
23	315000000	0.7	38.6	QAM256	23
24	323000000	0.2	37.6	QAM256	24
26	339000000	0.5	37.4	QAM256	26
27	347000000	-0.2	37.4	QAM256	27
28	355000000	0	37.6	QAM256	28
29	363000000	0.2	37.6	QAM256	29
30	371000000	-0.5	37.6	QAM256	30
31	379000000	-0.1	37.6	QAM256	31

3.0 Downstream channels

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

25	Locked	37.636276	0	0
1	Locked	37.636276	0	0
2	Locked	37.636276	0	0
3	Locked	37.636276	0	0
4	Locked	38.605377	0	0
5	Locked	38.605377	0	0
6	Locked	37.636276	0	0
7	Locked	38.605377	0	0
8	Locked	37.636276	0	0
9	Locked	37.636276	0	0
10	Locked	38.605377	0	0
11	Locked	38.983261	0	0
12	Locked	38.983261	0	0
13	Locked	38.605377	0	0
14	Locked	38.605377	0	0
15	Locked	37.636276	0	0
16	Locked	38.605377	0	0
17	Locked	38.605377	0	0
18	Locked	38.605377	0	0
19	Locked	38.605377	0	0
20	Locked	37.636276	0	0
21	Locked	37.636276	0	0
22	Locked	38.983261	0	0
23	Locked	38.605377	0	0
24	Locked	37.636276	0	0
26	Locked	37.355988	0	0
27	Locked	37.355988	0	0
28	Locked	37.636276	0	0
29	Locked	37.636276	0	0
30	Locked	37.636276	0	0
31	Locked	37.636276	0	0

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

159

96

4K

1880

QAM4096

424

3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

40

-0.3

2850407

0

[richardmc85]

3.0 Upstream channels

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

1	39400000	43.5	5120 KSym/sec	64QAM	4
2	46200000	44	5120 KSym/sec	64QAM	3
3	53700000	44.5	5120 KSym/sec	64QAM	2
4	60300000	45	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	2	0	0
2	US_TYPE_STDMA	0	2	13	1
3	US_TYPE_STDMA	0	2	14	1
4	US_TYPE_STDMA	0	2	12	1

[richardmc85]

General Configuration

Network access	true
Maximum Number of CPEs	1
Baseline Privacy	true
DOCSIS Mode	3.1
Config file	wrkldJKDHSUBsgvca69834ncx

Primary Downstream Service Flow

SFID	3205
Max Traffic Rate	575000000
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	4097
Max Traffic Rate	38520000
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	16320
Scheduling Type	bestEffort

[richardmc85]

Network Log

Time Priority Description

Thu 01/01/1970 00:01:25	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:09:00	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:09:05	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:10:00	5	Initializing Channel Timeout Expires - Time the CM can perform initial ranging on all upstream channels in the TCS has expired;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:10:00	5	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:15:32	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:15:39	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:16:33	5	Initializing Channel Timeout Expires - Time the CM can perform initial ranging on all upstream channels in the TCS has expired;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:16:33	5	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:16:34	6	CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: 171090; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:17:03	3	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;
Fri 03/09/2021 10:28:37	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;
Fri 03/09/2021 10:28:37	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:36	3	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:36	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:36	5	Initializing Channel Timeout Expires - Time the CM can perform initial ranging on all upstream channels in the TCS has expired;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:36	4	TCS Fail on all Upstream Channels;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:41	3	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:41	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:42	3	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:42	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:43	3	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:43	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:29:46	3	No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:30:26	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:30:28	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:31:26	5	Initializing Channel Timeout Expires - Time the CM can perform initial ranging on all upstream channels in the TCS has expired;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:31:26	5	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:31:51	6	CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: 169965; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri 03/09/2021 10:31:56	3	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;

[lotharmat]

D/S power spread looks a little wide - too many T3 timeouts for my liking.

Looks like U/S is having problems with ranging responses from the CMTS - I'd wager that you need a tech visit to investigate!

[richardmc85]

Thanks for your help. Neighbours seem to be working fine when we asked, so oddly just us.

Would those errors explain why the Hub disconnects every 15 minutes and reconnects again? When it is running for that 10-15 period - perfect.

[lotharmat]

It could!

[Zak_M]

Good afternoon @richardmc85 

Welcome back to the forums and thank you for taking the time to post. 

I have just taken a look over your account & I can see that you are currently suffering from an SNR outage, this is due to be resolved 09/09/21 @11:00. 

Kind regards,

Zak_M

[richardmc85]

Thanks Zak.

My online Service Status still shows no issues, oddly.

Massively frustrating with it disconnecting/reconnecting every 15 minutes (perflectly at xx:14, xx:29, xx:44 and xx:59 according to Google Home).
Makes streaming and video calls an absolute nightmare as you tend to get a 10 minute internet slot every 15 minutes!

Thanks for the help.