@Clive_A Goodnight! It worked, that was all. Now on the Tl-470+ there is no such option, below are the images of how it is configured and what is needed for the failover to work? On the 470 there...

Failover only works when you turn off one of the devices, but not when one of the internet goes down. Companies that provide internet come with a GPON and a router. When the fiber signal in GPON...