@Joseph-TP No' it's not like that. The topology is like this Cable modem—Mikrotik(router)—Switch—Wifi Router—Archer C54)))((( client devices so, from modem, it connected to Mikrotik as a router, then...

I bought two Archer C54s. I successfully set one up, and it's been running for more than one year. But the other one never worked properly. I could only test it during the holiday as when I set it...