I need to enable/disable the ethernet port, and I don’t want to use command “ifconfig eth0 down/up”.
It just down/ up the eth0 interface, I need to power on/off this interface.
Otherwise, can I control the eth0 speed (10Mbps/100Mbps)?
You could try something like this. While not an on/off switch it would do the same thing: enter image description here. I imagine what you could do, is place the cat-5 into the switch and then switch to the other port when you need to turn it off. Note: while this looks like a RJ-11 it says it’s a RJ-45 .