Could not configure speed and duplex to 10 Gbps.
Could not configure speed and duplex to 10 Gbps.
I can help you find your router model if you share the details or a link to the device.
if it doesnt autoconfigure up to that speed, something in the chain of cables and devices is not liking the 10G speed. wether that's your cable, the router, the network card, a fussy connector not hooking in quite right, etc.. also - if you're going trough network cables in the wall (i.e. your cat7 cable plugs into a socket in the wall, and on the router end there's another wall socket that plugs into) that most likely isnt good enough to push gigabit. i forget the exact details, but the spec on CAT6A (the most lenient 10gig one...) comes down to if you have your connectors made as good as they can be, 4 connectors mean you fall out of spec.
You've discovered the fix—your router only handles up to 1 Gbps on Ethernet, but for 10 Gbps you need the SFP+ side. Using the adapter should resolve the issue. Appreciate the assistance!