Seems I have a bad port - LAN3 only connects at 100base-T half-duplex. The problem stays on the port, not the cable, if I swap cables and devices around. It’s always LAN3.
Is there any kind of config issue that could cause this, or is it likely a hardware issue?
I don’t see any settings specific to that port in /etc/config/networking and swconfig shows the speed but apparently doesn’t allow setting the speed, as I always get Operation not supported
Port 3: mask: 0x0000: (3) qmode: 3 pvid: 1 link: port:3 link:up speed:100baseT half-duplex
Let me know if there’s anything else I can test or output to provide, thanks!