Daily intermittent dropouts on VM Broadband

[bsomanlol]

Hi All,

I am having regular daily dropouts on my home network for all devices where they lose access to the internet for a few moments. Some devices then need re-setting up again to work with internet services regularly.

Looking at my router status, I can see Pre-RS Errors but no Post-RS errors and a healthy SNR:

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

1	Locked	40.3	188	0
2	Locked	38.9	48	0
3	Locked	40.3	138	0
4	Locked	40.3	42	0
5	Locked	40.3	33	0
6	Locked	40.3	98	0
7	Locked	40.3	62	0
8	Locked	40.3	199	0
9	Locked	40.3	47	0
10	Locked	40.3	85	0
11	Locked	40.3	94	0
12	Locked	40.9	432	0
13	Locked	40.3	75	0
14	Locked	40.9	95	0
15	Locked	40.9	192	0
16	Locked	40.9	71	0
17	Locked	40.3	314	0
18	Locked	40.3	197	0
19	Locked	40.3	170	0
20	Locked	40.9	307	0
21	Locked	40.3	149	0
22	Locked	40.3	104	0
23	Locked	40.3	161	0
24	Locked	40.3	150	0

Upstream however, I do see incrementing TS Timeouts (granted small numbers here):

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

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

I do not see daily log errors for the issue but I do see some ranging response critical errors and some DHCP renewal errors:

31/12/2024 15:49:41	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
31/12/2024 12:43:20	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
28/12/2024 23:51:26	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
28/12/2024 00:43:20	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/12/2024 16:57:28	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

I se a number of other forum posts that seem to be a similar issue which has varied responses, but some mentioned a requirement to replace the router:

https://community.virginmedia.com/t5/Networking-and-WiFi/Errors-No-Ranging-Response-received-T3-time...

Can someone please help me work through it as it's driving us mad every time we're in the middle of loading a show to watch or need to google something.

Thanks,

B

[Adduxi]

You can ignore those log entries as that’s the way the Hub reports the WAN DHCP leasing. The other stats look okay and with no PostRS errors the circuit should be good. 
If the dropouts are only WIFI  I would suggest you disable the Smart Optimisation and manually set the channel bands avoiding DFS channels on the 5Ghz band and setting the 2.4Ghz to either channel 1, 6 or 11