Packet loss/T3 limeouts

[techtino]

Hi,

For a while now I've been seeing constant packet loss on my network, I've been ignoring it up until now as I've been working at my office, however now I'm back home for a bit and it's rough.

I get drop-outs for about 20 seconds at a time, and in some extreme cases the entire connection goes for several minutes (as has happened today).

Here's relevant downtream channels/logs etc:

3.0 Downstream channels

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

16	259000000	2.6	38.6	QAM256	16
1	139000000	3.3	37.6	QAM256	1
2	147000000	3.6	37.6	QAM256	2
3	155000000	4.1	38.6	QAM256	3
4	163000000	4.3	37.6	QAM256	4
5	171000000	4.2	37.6	QAM256	5
6	179000000	4.4	39	QAM256	6
7	187000000	4.5	39	QAM256	7
8	195000000	4.3	38.6	QAM256	8
9	203000000	4	39	QAM256	9
10	211000000	3.9	38.6	QAM256	10
11	219000000	3	37.6	QAM256	11
12	227000000	2.5	37.6	QAM256	12
13	235000000	1.9	39	QAM256	13
14	243000000	1.7	38.6	QAM256	14
15	251000000	2.3	38.6	QAM256	15
17	267000000	3	38.6	QAM256	17
18	275000000	3.6	39	QAM256	18
19	283000000	3.3	39	QAM256	19
20	291000000	3.3	39	QAM256	20
21	299000000	3.5	39	QAM256	21
22	307000000	3	39	QAM256	22
23	315000000	2.9	38.6	QAM256	23
24	323000000	3	38.6	QAM256	24
25	331000000	2.5	39	QAM256	25
26	339000000	2.8	39	QAM256	26
27	347000000	3.3	39	QAM256	27
28	355000000	2.5	38.6	QAM256	28
29	363000000	2.8	38.6	QAM256	29
30	371000000	3	38.6	QAM256	30
31	379000000	1.6	38.6	QAM256	31

3.0 Downstream channels

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

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

[techtino]

3.1 Downstream channels

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

159

96

4K

1840

QAM256

759

3.1 Downstream channels

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

159

Locked

42

-1.7

5

0

3.0 Upstream channels

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

1	43100000	43.3	5120 KSym/sec	QAM64	2
2	23600000	42.8	5120 KSym/sec	QAM64	5
3	30100000	42	5120 KSym/sec	QAM64	4
4	36600000	43.3	5120 KSym/sec	QAM64	3
5	49600000	44	5120 KSym/sec	QAM64	1

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0
5	ATDMA	0	0	0	0

3.1 Upstream channels

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

6

10.0

38.5

2K

QAM8

3.1 Upstream channels

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

6

OFDMA

200

53.9

2

0

Network Log

Time Priority Description

Tue 04/04/2023 13:17:27	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 13:17:21	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 13:16:37	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 13:14:40	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;
Tue 04/04/2023 13:13:40	5	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 13:13:36	6	CM-STATUS message sent. Event Type Code: 21; 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;
Tue 04/04/2023 13:13:35	3	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 12:56:19	6	CM-STATUS message sent. Event Type Code: 23; 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;
Tue 04/04/2023 12:55:29	6	US profile assignment change. US Chan ID: 6; Previous Profile: ; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 12:55:29	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;
Tue 04/04/2023 12:54:51	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 12:54:45	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 12:51:45	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;
Tue 04/04/2023 12:50:46	5	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 12:50:42	3	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 11:59:25	6	CM-STATUS message sent. Event Type Code: 23; 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;
Tue 04/04/2023 11:54:03	6	US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Tue 04/04/2023 11:46:41	6	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[techtino]

Broadband quality monitor (started it again today as my IP changed):

https://www.thinkbroadband.com/broadband/monitoring/quality/share/1d4724a1e28d4db2898ca593e3dd4d31d0...

[lotharmat]

The most useful and up to date info comes from the 0800 561 0061 number. Try that to see if there are any faults that the web service hasn't picked up!

[techtino]

Cheers for that, nothing through that number either, will keep that in mind for the future. It's been a few months like this so didn't expect it to show up anyway.

[Nathan_B]

Hi there @techtino 👋 Welcome back to the forum and thanks for your post.

I'm sorry to see that you are having issues with packet loss with your connection. I have checked things on our system and are unable to see any test results from here. Can you please reboot your hub so these checks can be carried out?

Let us know when this has been done and we will be happy to assist further.

Regards

Nathan

[techtino]

Hi, I'm running my hub in modem mode currently, which could be why the tests don't work on your end. I'll swap back to router mode at some point if that's the case.

[John_GS]

Hi @techtino 

Thanks for coming back to the thread.

The hub is showing online for nearly 7 weeks. Are you able to reboot it and put it in router mode for us to enable us to do some diagnostics? 

Kind regards,

[techtino]

Hi,

I've swapped over to router mode again (which triggered the hub to restart). I'm also testing a different ethernet cable just incase it's actually that.

[lotharmat]

Can you repost your hub stats?

I'm sure the QAM for the 3.1 DS channel should be 4096 not 256.