***HELP*** No Ranging Response/Inconsistent Wifi

[ikevvin]

I'm experiencing wifi issues with mainly a fire cube tv using a vpn although from time to time the issues appear on other devices. I have no idea what I'm looking at but I've attached as much info as I can. Does this look okay?

Time Priority Description

11/03/2023 12:58:24	notice	LAN login Success;CM-
11/03/2023 06:22:12	critical	No Ranging Response received - T3 time-out;
11/03/2023 05:51:4	Warning!	RCS Partial Service;
11/03/2023 05:51:4	critical	SYNC Timing Synchronization failure - Loss of Sync;
11/03/2023 05:51:4	Warning!	RCS Partial Service;
11/03/2023 05:51:3	critical	SYNC Timing Synchronization failure - Loss of Sync;
11/03/2023 05:51:3	Warning!	RCS Partial Service;
09/03/2023 18:37:19	critical	No Ranging Response received - T3 time-out;
09/03/2023 06:51:57	Error	DHCP RENEW WARNING - Field invalid in response v4 option;
08/03/2023 22:49:21	critical	No Ranging Response received - T3 time-out;
08/03/2023 22:49:20	Warning!	RCS Partial Service;
08/03/2023 22:49:18	critical	SYNC Timing Synchronization failure - Loss of Sync;
08/03/2023 22:49:17	Warning!	RCS Partial Service;
08/03/2023 22:49:17	critical	SYNC Timing Synchronization failure - Loss of Sync;
06/03/2023 03:25:0	critical	No Ranging Response received - T3 time-out;
05/03/2023 18:51:57	Error	DHCP RENEW WARNING - Field invalid in response v4 option;
05/03/2023 15:37:30	notice	LAN login Success;
05/03/2023 15:37:12	Warning!	LAN login FAILED : Incorrect Username / Password / ConnectionType;
04/03/2023 03:24:34	critical	No Ranging Response received - T3 time-out;
02/03/2023 13:33:19	Error	DHCP RENEW WARNING - Field invalid in response v4 option;

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

1	291000000	5.3	40	256 qam	20
2	235000000	3.7	40	256 qam	13
3	243000000	4	40	256 qam	14
4	251000000	4.4	40	256 qam	15
5	259000000	4.6	40	256 qam	16
6	267000000	4.6	40	256 qam	17
7	275000000	5	40	256 qam	18
8	283000000	5.5	40	256 qam	19
9	299000000	6	40	256 qam	21
10	307000000	5.8	40	256 qam	22
11	315000000	6.1	40	256 qam	23
12	323000000	7	40	256 qam	24
13	331000000	6.5	40	256 qam	25
14	339000000	6	40	256 qam	26
15	347000000	5.8	40	256 qam	27
16	355000000	5.3	40	256 qam	28
17	363000000	5.8	40	256 qam	29
18	371000000	5.4	40	256 qam	30
19	379000000	5.5	40	256 qam	31
20	387000000	5.6	40	256 qam	32
21	395000000	5.5	40	256 qam	33
22	403000000	5.5	40	256 qam	34
23	411000000	5.8	40	256 qam	35
24	419000000	5	40	256 qam	36

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

1	Locked	40.3	508	4413
2	Locked	40.9	11645	12768
3	Locked	40.9	10344	14022
4	Locked	40.9	5683	15733
5	Locked	40.3	3832	18046
6	Locked	40.9	2175	19337
7	Locked	40.3	1222	4200
8	Locked	40.9	621	4197
9	Locked	40.3	3397	17365
10	Locked	40.9	884	19944
11	Locked	40.9	721	7421
12	Locked	40.9	321	7767
13	Locked	40.3	409	7769
14	Locked	40.9	461	7515
15	Locked	40.9	491	7713
16	Locked	40.3	407	7833
17	Locked	40.9	540	7777
18	Locked	40.3	707	7699
19	Locked	40.9	824	7162
20	Locked	40.9	1450	4256
21	Locked	40.9	901	4960
22	Locked	40.9	1253	11220
23	Locked	40.3	906	9438
24	Locked	40.3	732	8722

[jbrennand · Accepted solution]

A few worrying signs - can you start from a clean sheet and do this...
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Switch the Hub off and unplug it from the mains supply for five minutes. Whilst it's off, do a quick check that all of your coax and ethernet cable connections are in nice and "finger" tight - at the Hub and wall box and also at any connectors etc. Ensure there are no “unterminated cable loose ends. Disconnect all the connections and reconnect to be sure. Also check that the internal wiring is ok with no kinking or chaffing, check tomorrow that all looks good with the outside cabling and wall box (no “staples, etc.,) piercing the cables. Then switch the Hub back on and leave ~5 minutes

When all done, check back in the settings and ensure that the RS error counts and T3 errors have all reset to 0. Then check every hour or so to see if they start reappearing - they shouldn't. If they do (particularly the postRS and T3 ones) you have a problem (noise) that only a Tech visit will sort.

Also check the Upstream QAM’s are all at 64 - if they are still dropping (to 32/16) then see message 3 here…

https://community.virginmedia.com/t5/Networking-and-WiFi/Regular-Intermittent-Upstream-dropouts/td-p...
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Also, If you haven’t already, set up a free, secure and “offlsite” - “Broadband Quality Monitor” to continually monitor the state of your connection and record any true network dropouts , latency issues, packet drops, etc - it will thus allow you to differentiate between those and simple wifi dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with VM - note it will take a few hours to start seeing a sensible picture - post up the “link” to the “share live graph”. Click the lower link (Share Live Graph) then, click generate. Copy the text in the Direct Link box, beware, there may be more text than you can see. On here click the Link icon (2 links chain to the left of the camera icon) In the URL box paste the link you copied and then click OK

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

[ikevvin]

Thank you so much...a lot to take in be will follow step by step and see if ifs a hardware or software issue the monitoring program will be a big help too!