Good morning @Paul , unfortunately I come bearing bad news (for me at least) - swapping the Connectbox had no effect.
I made a point of swapping every part I could (splitter, coax cable, modem, modem power supply, ethernet cable to router), but after a few hours, this connectbox also stops responding on the network:
Ping responses from connectbox (192.168.100.1)
And my main issue (packet loss on upstream and downstream traffic) returned after about a day:
Here you can see packet loss upstream:
And here you can see packet loss downstream to ziggo.nl:
I have attached screenshots of the connectbox network status after a fresh reboot, the main "smoking gun" I can see is the T3 timeouts and CM-STATUS message, but I don't know what either of those mean.
I think it is likely another engineer will need to visit, but is there anything I can do to further troubleshoot before they come? My current working theory is that there must be an issue with Connectbox Giga when in bridge mode - it can't be normal that after a certain number of hours it starts dropping packets on the LAN, and then some hours later dropping packets on the WAN.
Please help, I'm starting to tear my hair out over this. When the packet loss starts it is almost impossible to join a video call, which of course is a bit of a disaster these days... For now I have put the schakelklok back in place to reboot the connectbox every 24 hours. Thanks in advance.