How to failover to LTE
I have a Archer A6 fibre router. Connected to that is my PC, DECO4s and a TL-SG108S 8-port Desktop Network Switch. The Fibre router and switch is in my office and from there I've got CAT6 cables running through the walls to various areas of the house where they connect to the DECOs and other devices. I also have a Zyxel LTE router but that is standing on its own at the moment, not connected to anything.
Due to all the loadshedding, I find that the fibre is going down quite often and I would like to somehow bring my LTE router into the mix as a backup. Thus, I want to somehow when the fibre goes down, that the internet in the router switches from fibre to LTE without any of the devices connected to the network or wifi "noticing".
I'm quite sure the Archer A6 doesn't have this capability but is there maybe another device that can take two ethernet inputs for internet and switch between which one to use based on the availability of the primary input? I have/had a router that could do that (think also a Zyxel), but it is an older router that is limited to 100mbps. Also can't remember if it only took a USB for LTE backup or an ethernet cable.