Wifi drop off - low Dbmv?

[Broadbean1]

Hi, 

I've been with Virgin just over a month and am experiencing frequent drop offs in wifi to the point I where I can no longer take work calls unless I am in the same room as the router. I purchased a Netgear EX7700 extender but this did not help. Have now switched to an Eero Mesh network so the Hub (3.0) is in Modem route. This has improved things as I can now get wifi in all parts of my building (only 90sqm) but when I am in my office the wifi does continue to drop out for about 20 seconds at a time every 5-10 minutes. I have checked the RSSI for my laptop and it ranges between 30-50, I checked for any local issues and am not seeing anything pop up which has led me to believe its something to do with the line coming into my router/modem.  Having looked at the forum I can see that my Dbmv Downstream is low and wonder whether that has something to do with it? 

[Broadbean1]

Downstream bonded channels

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

1	402750000	1.5	38	256 qam	30
2	202750000	2.7	36	256 qam	9
3	210750000	2.4	36	256 qam	10
4	218750000	2	36	256 qam	11
5	226750000	1.7	36	256 qam	12
6	234750000	1.2	36	256 qam	13
7	242750000	1	36	256 qam	14
8	250750000	1	36	256 qam	15
9	258750000	1	36	256 qam	16
10	266750000	1.5	36	256 qam	17
11	274750000	1.7	37	256 qam	18
12	282750000	2	37	256 qam	19
13	290750000	2	37	256 qam	20
14	298750000	1.9	37	256 qam	21
15	306750000	1.5	37	256 qam	22
16	314750000	1.4	37	256 qam	23
17	322750000	1.5	37	256 qam	24
18	330750000	2	37	256 qam	25
19	370750000	2	37	256 qam	26
20	378750000	1.7	37	256 qam	27
21	386750000	1	37	256 qam	28
22	394750000	1	37	256 qam	29
23	410750000	1.9	37	256 qam	31
24	418750000	1.7	38	256 qam	32

Downstream bonded channelsChannel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1	Locked	38.6	5	0
2	Locked	36.3	7	0
3	Locked	36.3	7	0
4	Locked	36.3	4	0
5	Locked	36.3	6	0
6	Locked	36.3	6	0
7	Locked	36.3	7	0
8	Locked	36.3	12	0
9	Locked	36.6	5	0
10	Locked	36.6	5	0
11	Locked	37.3	6	0
12	Locked	37.6	7	0
13	Locked	37.3	6	0
14	Locked	37.3	19	0
15	Locked	37.6	4	0
16	Locked	37.3	16	0
17	Locked	37.6	5	0
18	Locked	37.6	1	0
19	Locked	37.3	0	0
20	Locked	37.3	4	0
21	Locked	37.6	10	0
22	Locked	37.6	0	0
23	Locked	37.6	5	0
24	Locked	38.9	5	0

Upstream bonded channels

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

1	39399988	41	5120	64 qam	3
2	25799981	39.5	5120	64 qam	5
3	32600000	41	5120	64 qam	4
4	46200002	41	5120	64 qam	2

Upstream bonded 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

[Z92]

Your power levels look fine, and there's no indication of any interference.

Can you post the network log too? Maybe that will say something.

Is it possible to also create a BQM so that we can check the internet side of the router?

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

[Broadbean1]

See Network Log below: 

See BQM set up here - https://www.thinkbroadband.com/broadband/monitoring/quality/view/3d87aa3e360b0b9971c3e6fd7377a8de149...

Time Priority Description

30/06/2021 08:08:42	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/06/2021 07:54:15	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/06/2021 07:43:19	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/06/2021 07:43:6	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 15:29:54	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 07:38:49	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
28/06/2021 19:51:2	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 22:30:9	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 21:24:17	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 15:03:56	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 09:52:4	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt057-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 09:52:4	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/06/2021 14:17:50	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/06/2021 06:44:59	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/06/2021 21:18:47	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/06/2021 13:36:51	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt057-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/06/2021 13:36:51	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/06/2021 00:31:45	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/06/2021 09:50:57	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/06/2021 09:35:48	Warning!	LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[lotharmat]

There are a few T3s in the log that could cause the RCS (downstrream) to have partial service - it then sometimes drops all downstream connections and re-negotiates and syncs them.

(Getting a 404 on the BQM)

[Adduxi]

If the VM Hub is in Modem mode then it's not the source of the wifi issue.  The power levels are within spec in any case.

You should get a wifi analyser app and check the wifi environment in the house.  You may have to set the wifi bands and channels manually, as some band steering kit can cause small interruptions to wifi during the channel/band moves.

[Broadbean1]

Thanks, I’m still getting continued drop offs in one room. The broadband analyser would suggest packet loss but I’m completely out of my depth here. If you have A look at the graph is it something I can resolve or Virgin? 

https://www.thinkbroadband.com/broadband/monitoring/quality/view/3d87aa3e360b0b9971c3e6fd7377a8de149...

[lotharmat]

Still getting a 404 on the BQM!

To share - navigate to the graph page, click 'Share Live Graph', then highlight the 'direct link', copy it then paste it on here!

[Broadbean1]

Sorry - see here! 

https://www.thinkbroadband.com/broadband/monitoring/quality/share/a49c68acab735c120ea0e18fb3639b550c3565c6

[lotharmat · Accepted solution]

---

@Broadbean1 wrote:

Sorry - see here! 

https://www.thinkbroadband.com/broadband/monitoring/quality/share/a49c68acab735c120ea0e18fb3639b550c3565c6

---

That's the bunny! And Woah!!!!!

Looks like classic over-utilisation!!