Confirm - XB8 Port 4 is 2.5G ethernet???

I've searched and can't seem to get a definite answer here on if the XB8 indeed  has a 2.5G ethernet port.   I see that port #4 (Bottom Right) has a red line next to it.   Can someone please confirm if that is indeed the 2.5G ethernet port?

I just got the GIG X2G package and have own router configured to use a 2.5G WAN port.   (Using the XB8 in Bridge mode).  I'm not really seeing the 2G down speed.   

(I measure my speed AT my router with an add-on app--(ASUS-Merlin).