Just updated the firmware AFAIK
3006.102.5 Merlin
Ethernet cable is working at 10 Gbps, no problem there.
Don't know the upstream speed but link speed is 1 Gbps
Router has not been moved. BTW, removed the SFP+ and plugged in back, no luck.
Yes, I've rebooted the router
I didn't unplug the router...