I'm trying to install a network with a RUT240 router, using SIM card as an internet source.
I bought this unit as it is able to use both RJ45 ports as outgoing LAN ports. When looking at the multiple walkthroughs already available to change a WAN port to LAN port it simply doesn't work.
First I unchecked the Wired WAN as a WAN Failover under Network->WAN. Only thing checked is the Mobile (WAN) as Main WAN.
When I go to Network->LAN to check the box where it says "Use WAN port as LAN" and press Save, the router's WiFi stops working. Still gives WiFi signal but no internet. The 2G/3G/4G LEDs start cycling and blinking and most gets stuck blinking every 1 sec at 3G LED. Two bars are displayed on the Mobile signal LEDs even though it was 3-4 bars when earlier.
The WAN port works for a few seconds as a LAN port but then no internet.
The LAN port doesn't work.
Both ports' LEDs light up when cable is connected.
Am I doing something wrong? I changed nothing else in the setup wizard. Do I have to make some further altercation to the settings before enabling WAN as LAN for them to work together?
Firmware is up to date (14.4)