@Tony It make no differance which cable I use the device only connects at 100Mb. The Deco is connected on port 9. Also on Port 1 I have a switch which also have a second deco but this device will not...

I have a deco connected to a TL-SG1016PE and the connection status says it's only running at 100Meg and the switch keep flashing the port status in Yellow on and off once a second. I can't see any...