I noticed we do have one room that is connected with an unused cable line. Its not terminated, how important is it to not be terminated?
The IPv6 setup I did again last night did reboot the cable modem again within about an hour.
You can't have any unused ports and need twc out to fix this as I believe it's more than a simple open port.
MODEM MUST BE ON THE FIRST 2 WAY SPLITTER, Levels are normally in the -5 to +5dBmv range.
Modems don't work well below -8dBmv And don't work at all at -20 dBmv