Frequent Internet Disconnects. Started Unicast Maintenance Ranging - No Response received - T3 time
As the title states, I am randomly losing internet connectivity rather frequently. Started 2-3 weeks ago. Multiple times per day, connectivity drops for approximately 2-10 minutes. During this time, internet connectivity to external websites drops first, followed by connectivity to the modem.
The modem is a Netgear C6250 (AC1600) modem, which is one of the xfinity approved modems with DOCSIS 3.0 for my internet package. Every time connectivity is lost, when I log into the modem and check the log, "Critical(3) Started Unicast Maintenance Ranging - No Response received - T3 time-out" is the most recent entry. The modem is connected to the coax outlet directly inside the house from where the coax from the pole enters the house. It is a direct connection, with no splitters, to the outside line.
In the process of troubleshooting, I have changed the cable, changed the modem, even asked for an Xfinity XFI (Nice new white modem) to see if this would solve the problem. I have eliminated and removed all other devices from my network and plugged my computer directly into the modem, and the problem still persists. Since COVID19, my wife and I have been working from home and this has been very annoying to keep getting dropped from meetings and calls, as well as teaching for my wife.
I will post the LOG as well as my Upstream and Downstream info.