Mini setup router and switch

I'm interested in getting a mini but I don't want to buy a MoCa adapter and would rather use ethernet. My question is if I have one lead going from the router directly to the mini, and then another lead going first to a switch, then to the Roamio (base model, 4 tuner, using only OTA) will that setup work, or do both devices need to be directly connected to the same router (or same switch). Thanks!