Why does the modem not see the provider's traffic?

Question

WiFi

Good afternoon!
The question is, on the old asus router, the Internet periodically disappeared, I bought a new tenda AC11 in the admin panel settings, it does not see traffic at all, no answer, although the wan cable is connected. What could be the reason

Answer 1

in anything, for example, the provider may have a binding to the poppy address of the client hardware,
or you have authorization with the provider via pppoe/l2tp/pptp, and by default, the router expects that the provider’s hardware will send settings to it via dhcp