Wired HR54 doesn't stay connected. - DirecTV

I have an HR54 with Ethernet connection. The ethernet connects to a switch which is connected to my router.
I set up my Edgemax router to assign a static IP. The Receiver correctly shows the assigned IP.
Yet it frequently is disconnected. I try to access with my ipad and that's how I notice it. I simply disconnect the ethernet and reconnect, and everything is connected fine.

Any clue what the problem might be or suggestions on what to look for?

This question, "Wired HR54 doesn't stay connected.," is about DirecTV channels, programming, equipment, and sports.