How to auto check ethernet on Mikrotik

How to auto check ethernet on Mikrotik? Sometimes when you install a network cable to the ethernet to the mikrotik, do not know where ethernet is currently active.

example your router has 3 ethernet cards,
# NAME MTU MAC-ADDRESS ARP
0 R ether1 1500 00:04: AC: 25: CD: 5A enabled
1 R ether2 1500 00: B0: G0: C6: 47:6 C enabled
2 R ether3 1500 00:50:8 B: 0A: 57:1 A enabled

then type:

/interface ethernet set 0 disable-running-check = no
/interface ethernet set a disable-running-check = no
/interface ethernet set 2 disable-running-check = no

This will make a mark R on your router will be lost, and will appear again after the ethernet cable plugged into it. So it could be used to check which ethernet is currently active.


Since the default is always the first sign mikrotik R, whether it's plugged in or not. That's what makes us so confused.