I have a hAP ac directly connected to my pc through a cat6 cable. My pc’s NIC is also gigbit capable. But, on windows side it shows 100mbps link speed. I tried to switch 1000mbps on the router os , but it loses connection. So, do I need to change anything on the router or get a good patch cable, by which the router will auto negotiate gigabit speed with the computer?
Replace the cable.