Multiple network interfaces in LWIP with NIOS

Hi all,

I'm using opencore mac with ucos2+lwip in NIOS 5.1

I've tested the driver successfully with single mac interface which is chosen in the LWIP GUI.

Now I would like to test the driver with 3 mac interfaces with LWIP, is it possible? how to add multiple interfaces in LWIP, in the GUI it seems only 1 default interface can be chosen.

I noticed the LWIP supports the multiple interfaces but the code hasn't been tested. If someone did this before, please kindly advise, thank you.