SUCCESS!! Thanks to the Instructions from Clive_A plus the very patient guidance from TP-Link LIVE CHAT, I now have a Failover fully operational on my ER605. There are probably a hundred other...

@Clive_A Thanks for your reply & additional instructions. I upgraded the Firmware as recommended but I'm still getting no joy from the Failover. WAN (Primary) and WAN (Backup) are BOTH labelled...

Hello Router TP Link ER605 v2 Firmware: 2.0.0 Build 20220106 Rel.56391 PRIMARY WAN: Fibre Cable Connection Type: PPPoE Secondary WAN: 4G Connection Type: Static IP When Primary WAN is connected:...