@Clive_A Thanks for suggestion, but I found it before that. But looks like it's not connected to failover at all. When I use simple load balancing 1:1 with main WAN it is still connected, but...

Hi, I'm trying to add failover into my network. I do have old E3372h-153 laying around (so compatible one). It's "stick"/modem version. Modem is recognized. Pin is typed and accepted. IP is provided....