cascade routing

Hello all. I had purchased a new TP-Link TE-ER6020 Router and Switch for VLAN purposes, but then I realized that the Router didn't support my ExpressVPN (anonymity only). I am using DSL, so I have my modem setup in pass-through mode and have my router logging in via PPoE. So, not sure whether...

Hello all, is there a guide to "cascade" these Asus routers? I got the router on my modem, but a computer connected to the modem NOT the router and I cannot access the router from it. I have seen many guides but they mostly don't seem to fit this specific router. Also, i think my main modem does...