Network Glitching

[wdmullen]

I'm getting network glitches - sudden loss of bandwidth - and just wondering how to diagnose the problem?

I've just fitted a TP-link Deco X50 POE and have the Superhub 3.0 in Modem Mode - everything runs perfectly - with good bandwidth (350Mb/s). I have a gigabit TP-link unmanaged switch connected to the Hub Deco with a TP-link 600Mb/s Powerline Adapter that I use for my home office - which is remote from the house.

My new LG TV is next the hub Deco and gets a loss of bandwidth (a glitch) when hard-wired connected to the ethernet switch. I've tried the TV in Wifi mode and get the same problem. The Deco app reports no issues when the glitch occurs.

VM logs below. I remember the forum recommending a remote network manager tool - what was it called?  

Any ideas? ...and  thank you in advance for your help!

General Configuration

Network access	Allowed
Maximum Number of CPEs	1
Baseline Privacy	Enabled
DOCSIS Mode	Docsis30
Config file	cmreg-vmdg505-bbt062+voc-b.cm

Primary Downstream Service Flow

SFID	30544
Max Traffic Rate	402500089
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	30543
Max Traffic Rate	38500089
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	42600
Scheduling Type	BestEffort

Network Log

Time Priority Description

23/09/2023 09:48:30	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/09/2023 21:04:18	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
14/09/2023 14:11:35	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
14/09/2023 13:35:17	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/09/2023 11:28:12	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

Upstream bonded channels

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

1	53700000	38	5120	64 qam	7
2	39400000	38	5120	64 qam	9
3	46200000	38	5120	64 qam	8
4	60300000	37.5	5120	32 qam	6

Downstream bonded channels

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

1	139000000	-0.5	38	256 qam	1
2	147000000	-0.7	38	256 qam	2
3	155000000	-0.7	38	256 qam	3
4	163000000	-0.4	38	256 qam	4
5	171000000	0	38	256 qam	5
6	179000000	0	38	256 qam	6
7	187000000	0	38	256 qam	7
8	195000000	0	38	256 qam	8
9	203000000	0	38	256 qam	9
10	211000000	-0.2	38	256 qam	10
11	219000000	-0.5	38	256 qam	11
12	227000000	-0.5	38	256 qam	12
13	235000000	-0.5	38	256 qam	13
14	243000000	-0.7	38	256 qam	14
15	251000000	-1	38	256 qam	15
16	259000000	-1	38	256 qam	16
17	267000000	-0.9	38	256 qam	17
18	275000000	-0.9	38	256 qam	18
19	283000000	-0.7	38	256 qam	19
20	291000000	-0.7	38	256 qam	20
21	299000000	-0.7	38	256 qam	21
22	307000000	-0.9	38	256 qam	22
23	315000000	-0.7	38	256 qam	23
24	323000000	-0.7	38	256 qam	24

[David_Bn]

Good Morning @wdmullen, thanks for your post on our Community Forums, and welcome back!

Sorry to hear of the issues you've been experiencing with the connection, whilst in modem mode.

Can you confirm if these issues are also apparent in router mode?

Do you have any BQM monitors that perhaps allow us to see the performance of the connection in router and modem mode?

Thanks,

David_Bn

[legacy1]

Test with just a PC to the hub in modem mode no mesh or router

[wdmullen]

Thank you David.

I've just setup a BQM to monitor in Modem mode.

Once I have 24 hours of data, I'll switch to Router mode and re-run the BQM.

Data to follow

Many thanks, Will

[Adduxi]

Your DS levels are fine, but your have an US problem.  One of the channels is at 32 QAM, they all should be 64. Please post the DS PostRS errors from the Hub. 

Also you are using a PLA, which is not recommended, you really need to use an external ethernet cable for your outside office.

[wdmullen]

Many thanks:

1) DS PostRS errors below.

2) Wondering why not a PLA?  Between my outside office and the main Deco is a brick wall and a garage door - I have been toying with drilling a hole in the wall and running a Deco Mesh unit PoE - but the PLA seems to work - or does it? 

Downstream bonded channels

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

1	Locked	38.9	5	0
2	Locked	38.9	37	0
3	Locked	38.9	9	0
4	Locked	38.9	8	0
5	Locked	38.9	5	0
6	Locked	38.6	6	0
7	Locked	38.6	17	0
8	Locked	38.9	19	0
9	Locked	38.6	6	0
10	Locked	38.9	6	0
11	Locked	38.9	7	0
12	Locked	38.6	6	0
13	Locked	38.9	10	0
14	Locked	38.6	6	0
15	Locked	38.9	14	0
16	Locked	38.9	7	0
17	Locked	38.6	9	0
18	Locked	38.6	9	0
19	Locked	38.6	13	0
20	Locked	38.6	7	0
21	Locked	38.6	6	0
22	Locked	38.9	8	0
23	Locked	38.9	12	0
24	Locked	38.9	8	0

[wdmullen]

Apologies for the delay. Eventually figured out why the BQM was all red - had to allow WAN access on the Deco app. Will have BQM graphs (modem mode) in 24 hours. Many thanks for your support, Will.

[Client62]

We have four TP-link 600Mb/s Powerline Adapters, two with Wireless and they work well for office laptops, printers and TV streaming.   They are also far enough into your network to not affect the BQM results.

TP-LINK provide a utility program for the PC to enable us to see how well the PLAs are connected, if you have any doubts it might be worth a look.

This is a link to the tpPLC_Utility download, we have the latest version Published Date: 2023-02-09.

https://www.tp-link.com/uk/support/download/tl-wpa4220/v1.20/  

[wdmullen]

BQM here ... looks almost perfect o me - very few dropped packets, minimal peaks of latency upto 80ms is relatively tolerable. The TV that was encountering the glitch - becoming disconnected from wifi - appears to have cured itself. And the Mac that had the same issue - I've switched off enable-nap in power savubf so it has a relatively constant wifi connection - and also now appears to be always connected.

https://www.thinkbroadband.com/broadband/monitoring/quality/share/8947516777ca16bf69a95a68443321405f...

[Ashleigh_C]

Hi there @wdmullen 

Thank you for popping back and the BQM does look good, I am glad that the issues on the TV have improved, would you be able to monitor this for us and let us know how things are looking going forward.