This is an issue that VM needs to sort out. The first thing I did was to select modem mode as I have a very nice router (Asus RT-AC86U). The router (reconfigured for the connection from PPPoE to Auto IP) would not connect. Kept on getting "DHCP not working properly" (or similar) no matter what I did.
The ONLY thing to fix this was to press the reset button for 40 seconds. I ready this somewhere else from somebody else had issues with this, but not out of the box as I did as he had been a customer for a while.
Now just to get the connection I ordered...
Stress - the condition brought about by having to resist the temptation to beat the living daylights out of someone who richly deserves it.