D disble causes

So I have the ONT to the ATT Gateway.  From there to the Switch.  The Switch has Cat6e to several areas in the house, computers, TV then the Router.  It was working all along then started getting error messages and then line to wireless router upstairs in my house disabled.

Not sure why working for a year then it starts doing this.  ATT replaced the Gateway, I replaced the router, now I think we know it wasnt either.

I wanted to have the fastest connection between the wireless router upstairs since I hook the TV, PS4 and cell phones, ipads to it so I was using the 10g port to hook to the switch which is 10G.  I realize with the house being fed with "only" 1G that the ATT feed to the house isnt going to improve but I thought it nice to have everything else hooked to the fasted port I could, its nice to see everything on the switch and two of my computers have 10G cards in them, I have a NAS but not 10G it is set up as a LAG with two 1G.  In the future I see myself getting a 10G NAS as I enjoy photos and editing and the faster the better.

So I moved the wireless router to hook from the upstairs still but took one of my two 6e lines and hooked directly to the gateway and no dropping of the wireless or hardwire connected to the wireless router yet.

So it kind of appears that the switch was the issue, it wasnt port specific as I moved to a different port and it did the same thing.