Can I use the Ethernet port on my Plus

To connect up a router in bridge mode to improve wireless in that part of my house. My Roamio Plus and other Tivos are on a Moca Network. I set up a Linksys EA4500 in bridge mode, but I couldn't get it to work on the first go-round. Before I give it another try, just wanted to make sure this is feasible. I'm hoping I just entered a bad password when setting it up.