I resolved the issue. The WAN link is now online and Internet working. It was a combination of hardware controller (which is more complex than stand alone setup) and the issue of replacing a router...

I am switching from Zyxel Armor G5 router to ER7412-M2 router (controlled by OC200). I changed the default subnet on the router to 192.168.1.1/24 and router IP address to 192.168.1.1 (to match the...