I have the Spectrum Modem, model E31U2V1, that only has 1 ethernet output. I'm trying to run the single modem port to a tp-link 5-port unmanaged network switch. I have 3 ethernet drops run in the house I'm connecting to the switch. I'm currently running an eero mesh wifi network off one of the drops but if I try to add anything else to one of the other two drops it doesn't have internet connection. I even tried putting a second tp-link switch in line prior to the eero hub and still got no internet connection at the other drops or on the other ports of the switch not being used by the eero. Do I need to have Spectrum set their modem as just a passthrough, because I haven't been able to login to it. I had the last company I used do this and let the eero manage it. Or will I need to try buying and using my own modem?