I have two separate and I’m trying to figure out how to configure dual WAN on my XG-7100. I already tried and it did not work. I’ve done this in the past on a desktop pc with 2 wan + 1 Lan interfaces. I’ve managed to setup couple of vlans and all worked great without issue.
You have to create another trunk port and change one of the ports on the 8 port part of the switch over another WAN port.
The defaults are
So you could make WAN2 VLAN 4889 and then untag a port for the 4091 and change it to the new WAN.
I did that and did’n work . I created vlan 4092 assigned port memebers 2,9t,10t , removed port 2 from vlan 4091. See configs below