@Kevin_Z I connect the arch 10 with a cable to one out ethernet router of my Internet provider here in Argentina..I tested with my laptop this cable before I connected to the Arch10 and I have 300...

@Alejandr I changed the spped but it doenst work.It didnt detect the ip when i choose 1000 m,but in auto negotiating ,is still in 100 m.I check the cable directly to my laptop and it has 300...

I have a tp link router AX 10.I have a problem when I connect the ethernet.It show me 100 mgbits and the port is yhe 1 giga bit.It shows only this this port in 100 mgas. How could I change the speed....