Having a very strange issue - we recently had someone move into our spare bedroom about a month ago, and since he's arrived, our internet has died about 4 times where no one could connect to the internet (I can't even log into the router). He connects directly to the router via ethernet cable. I never noticed that this particular connection was the issue, however, until tonight.
I came home this evening, and we had no internet. Contacted the ISP, they said they're not seeing any issue from their end. Tried to log in to the router, and I could not connect. Ran IPCONFIG in cmd and I was getting no results for the ethernet cable I have plugged in. No default gateway, nothing. Tried to connect to the ISP's modem, and again no results.
Rebooted the modem and the router at least 5 times each, keeping them both off for multiple minutes before turning them back on, and still nothing. So I decided to plug out all the ethernet cables connected to the ASUS router, and connect them directly to the ISP's modem because something seemed very strange. Suddenly, my phone connected to the network! I thought maybe the ISP had fixed something, so I plugged back in the ethernet cables to the ASUS router. Net gone again.
One by one, I plugged out the ethernet cables trying to see if it was one of the connections. And of course, disconnecting the spare bedroom's ethernet cable brought the internet back to life... But now, the person who exists in that bedroom has no internet. A
ny thoughts on what the issue could be so I can resolve this? He has a laptop with Windows 10, an ethernet cable and he uses an ethernet splitter on his laptop so he can extend the connection to another device (usually an IP Phone, or another computer). Do you think this could be causing the issue?
He doesn't have internet when this issue occurs, so I know he's not intentionally blocking the internet.
