Looking around this seems to be a fairly common request on here, so hopefully a solution is available.
Ever since the start of lockdown, and only on warm days (over 20 degrees C), the internet shuts off. TV still works, but no channels/services that need internet. No Wi-Fi. Restarting doesn't fix the issue, the cables are all tight, the VM service checker always says there's no fault in the area. Correlation does not equal causation of course, but the hub seems to pack up shortly after the temperature hits 20 degrees. Service normally resumes in the evening (once the tempearture has dropped).
My network log has the following errors repeatedly during today's outage: No Ranging Response received - T3 time-out B-INIT-RNG Failure - Retries exceeded
SNR is sitting at 40 across the board
The only thing that looks odd is that there are over 1800 post-RS errors.
Is the street cabinet in a location where it would be particularly exposed to the sun - so perhaps with the long side of the cab facing south, catching the sun, and perhaps also sheltered from what wind there is? I seem to recall that Sephiroth's DOCSIS primer* says that impedance of the underground cable increases in warm weather, so presumably an increase in errors as well, but the street cab is the most likely place where I'd expect insolation effects to be greatest. As far as I can hear, there's no active ventilation on VM's cabs (unlike BT's FTTC cabs), and with DOCSIS 3.1 probably increasing power use, it is possible that VM's passive and not very ventilated cabs may be more prone to overheating as they upgrade the network?
* posted before he sublimed and became a minor god. He's still around, but you have to pray in order to get his sage wisdom.
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You shouldnt have that many T3's (10 in 1 hour!) down channel one looks a bit odd too - as suggested by David - the pinhole reset option is the place to start.
First do a quick check that all of your coax connections are in nice and "finger" tight at the Hub and wall box and at any splitters/attenuators/etc with no “unterminated loose ends – disconnect then and reconnect to be sure. Also check that the internal wiring is ok with no kinking or chaffing, check that all looks good with the outside cabling and wall box.
Then do a Hub “pinhole reset” - with the Hub "switched on" throughout, press pin in firmly and hold it there for 60 seconds – then release pin then leave it 10’ to stabilise. But first, make sure the 2 passwords on Hub sticker are still there and legible !
-------------------- John --------------------
My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.