I am using RUT230 and RUT240 with following WAN configuration:
Main Wan: Wired-WAN with DHCP interface
I connected a lapton on LAN port of device and no cable on WAN port.
Everything works properly, the laptop can navigate everywhere on internet.
When I set a static IP-Subnet-GW-DNS on Wired-WAN, connection stop working (still no cable inserten on WAN port of device).
There is no way to use Mobile connection, and the lapton doesn't navigate.
Rolling back to DHCP (always with no cable inserted on WAN port), laptop navigate again using failover mobile connection.
Is that normal? Is there a way to set RUT230/240 tu use failover mobile connection also with static ip on main wan connection?