Lose internet access at exactly same time every day - can set my watch by it!

[PaulinLeeds]

I've been living with this for a few years and have searched for fellow sufferers but without success. Very simply at 3.11 pm every day I lose internet access for approximately 1 minute. It is entirely predictable and has been happening for years. The rest of the time my connection is stable (apart from the very occasional interruption). When the clocks change so does the interruption, it shifts to 4.11 pm !

Losing internet means Facetime calls and things like that drop out but then reconnect when internet access is restored. The connection is restored relatively quickly, much quicker than when I restart my hub 5, that takes a few minutes to restart and connect.

Have any of you gurus any idea what's causing this and more importantly how it can be fixed please?

[jbrennand]

Is the issue only evident on wifi connections or do you see them at the same time on devices connected on ethernet cables? If you don't know, can you check on one to help diagnose whether it is just a wifi issue or it could be network connection/Hub related?

I reckon it will be some wifi interference kicking in on a timer somewhere.  Ours drops out when the Microwave oven is switched on  (!) and there was a thread here a few years ago where they were disconnected every evening albeit a differing times.  Turned out it coincided with the turning on of the street light outside their house !

[PaulinLeeds]

Hi. I don't think its a wifi problem (although I'll double check something tomorrow) as it affects my pc which is connected directly to the hub by an ethernet cable. Furthermore I can't think of anything in the house that does something every day at 3.11pm (or 4.11 pm during the summer) without fail, it really is entirely predictable. I imagine it might be something happening on the VM side of things but I've no clue what, that's why I'm here!

[PaulinLeeds]

Just logged in to my hub settings and I note that on the DHCP settings page the Lease Time is 86,400 seconds which of course is 24 hours. So, could it be that when the lease time runs out the internet connection is briefly lost? I see an option to disable the DHCPv4 server but I haven't the faintest idea what that means or whether it would solve my problem without creating new ones. Am I on the right lines or barking up the wrong tree, it just seems a heck of a coincidence that my interruption happens exactly every 24 hours which is the same period as the Lease Time....

[jbrennand]

That may well be the root cause.  Someone else will need to comment as I dont really get DHCP lease times and I have my own router - so I dont use the Hub's.

What Hub model do you have ?

[Adduxi]

Renewing a DHCP lease will not cut your internet off.  Even if it is set for 24 Hours, any connected device will be renewing after 12 hours as requests are usually sent after 1/2 the lease time.  Also the DHCP lease time is from the time a device requested it.  It's not like the leases are sent out every day at the same time. 

If you are concerned, you can extend the lease time on the DHCP settings.

You should setup a BQM to check if it is your circuit that is failing externally  www.thinkbroadband.com/ping

Otherwise it may be a local interference as the timing is so exact.  I suspect this will be hard to pin down, but I can't see it being a VM issue, or all the other users in the area would be affected.  I would still be looking for something around your property that's on a timer or similar.

[Roger_Gooner]

On no account should you disable DHCP. Can you post some stats.
For a hub 3/5: go to 192.168.0.1, do not log in, click on the link "Check Router Status".
For a hub 4: go to 192.168.0.1, log in, click on the link "Check Router Status".
Copy and paste the Downstream, Upstream and Network Logs as text (not images). Mask any public IP address.

[PaulinLeeds]

Hi Roger, 

Have pulled all the info you requested together but I am unsure what to look for when you say mask any public IP address. Where would that be amongst the details you requested, I can't see anything that looks like an IP address but I'm way out of my depth here. Incidentally the wifi lost its internet connection at 3.11 as usual, the Echo Dot was playing internet radio and it lost its signal. Wifi comes via a Tenda mesh which is connected to our Hub 5 which is in standard router mode.

By the way, I looked at the log and there's nothing at 3.11pm

[jbrennand]

to expand on Rogers comment - see this...

Post up your Hub/network connection details and someone will check to see if there is a problem there.  In your browser’s URL box type in http://192.168.0.1 (or http://192.168.100.1 - if in modem mode) (DONT click these links) - and hit return. No need to log in - just click on the “Router Status” icon/text at bottom-middle (Hub3/4/5) or top/right (SH’s) - of the Login page.
Then… Navigate to these “data pages” and just copy/paste the normal “Formatted Text” (not images) 3 FULL sets of data onto here – 2 tables from the Downstream, 2 from the Upstream, & the Network Logs pages. Don't worry too much about the formatting it can be easily read & DON’T include personal data or MAC addresses - blank them out - but if you copy/paste the data, the board software will do this for you (you may need to click the "submit" button again). If character limits are “exceeded” - just do two posts

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

[PaulinLeeds]

Ok, here's what I think you asked for. I'm still unsure about what I'm masking. In the Network Log it does mention Mac Addr in lots of places but I don't know if that's sensitive stuff or not - as such I've not included the log until someone tells me in laymans terms what I should be hiding!

Cable Modem Status
Item Status Type
Cable Modem Status Online DOCSIS 3.0
Primary downstream channel Locked SC-QAM
Channel Overview Downstream Upstream
DOCSIS 3.0 channels 32 5
DOCSIS 3.1 channels 1 1

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1 299000000 3.2 40 QAM 256 21
2 139000000 5.6 40 QAM 256 1
3 147000000 5.5 39 QAM 256 2
4 155000000 5.2 39 QAM 256 3
5 163000000 4.9 40 QAM 256 4
6 171000000 4.7 40 QAM 256 5
7 179000000 4.2 40 QAM 256 6
8 187000000 4.1 40 QAM 256 7
9 195000000 4.2 40 QAM 256 8
10 203000000 3.9 40 QAM 256 9
11 211000000 3.8 40 QAM 256 10
12 219000000 3.6 39 QAM 256 11
13 227000000 3.5 40 QAM 256 12
14 235000000 3.3 40 QAM 256 13
15 243000000 3.1 40 QAM 256 14
16 251000000 2.9 40 QAM 256 15
17 259000000 2.8 40 QAM 256 16
18 267000000 3.5 40 QAM 256 17
19 275000000 3.9 40 QAM 256 18
20 283000000 3.7 40 QAM 256 19
21 291000000 3.6 40 QAM 256 20
22 307000000 3.2 40 QAM 256 22
23 315000000 3 40 QAM 256 23
24 323000000 2.9 40 QAM 256 24
25 331000000 2.8 40 QAM 256 25
26 339000000 2.7 39 QAM 256 26
27 347000000 2.6 40 QAM 256 27
28 355000000 2.4 40 QAM 256 28
29 363000000 1.9 40 QAM 256 29
30 371000000 1.7 40 QAM 256 30
31 379000000 1.8 40 QAM 256 31
32 387000000 2.1 40 QAM 256 32
3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1 Locked 40 218 3
2 Locked 40 529957 90048
3 Locked 39 567184 73338
4 Locked 39 530530 35212
5 Locked 40 884833 12421
6 Locked 40 988614 24230
7 Locked 40 1130650 3135
8 Locked 40 35695 11473
9 Locked 40 229 0
10 Locked 40 180 0
11 Locked 40 193 0
12 Locked 39 244 0
13 Locked 40 324 10
14 Locked 40 320 12
15 Locked 40 245 1
16 Locked 40 183 0
17 Locked 40 145 0
18 Locked 40 127 0
19 Locked 40 165 0
20 Locked 40 243 0
21 Locked 40 284 2
22 Locked 40 118 0
23 Locked 40 77 0
24 Locked 40 74 0
25 Locked 40 76 0
26 Locked 39 99 0
27 Locked 40 110 0
28 Locked 40 77 0
29 Locked 40 74 0
30 Locked 40 58 0
31 Locked 40 61 0
32 Locked 40 54 0
3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159 190 4K 3736 QAM 4096 148
3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
159 Locked 37 -4.0 2745356797 679412

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
0 49600000 46.5 5120 QAM 64 9
1 43100000 47 5120 QAM 64 10
2 36600000 46.5 5120 QAM 64 11
3 30100000 46.5 5120 QAM 64 12
4 23600000 45.8 5120 QAM 64 13
3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
0 ATDMA 0 0 0 0
1 ATDMA 0 0 0 0
2 ATDMA 0 0 0 0
3 ATDMA 0 0 0 0
4 ATDMA 0 0 0 0
3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
14 10 40.7 2K QAM 128
3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
14 OFDMA 200 74000000 0 0

Time Priority Description
25-01-2024 15:08:33 notice CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr