Thanks for answering,
Jimbo. I’m no means a DirecTV expert, but this is an AT&T Fiberoptic install that replaced her old U-verse setup. There’s a pair of what I take to be MoCA adapters, one hooked up behind the TV and Genie, and the other at the AT&T WiFi Router with an Ethernet connection to the router.
The Ethernet attached to the MoCA at the TV end is connected to a switch which goes to a streaming box and her Denon receiver. No Ethernet to the Genie. But if the Genie groks MoCA, then yes, it has an Internet connection.
If I disable DHCP on the Genie’s LAN settings, give it a bogus IPv4 address, that should isolate her Genie. What do I break by doing that? Does the Genie have a Streaming fallback if the DBS signal is disrupted?