RBR50 with Verizon LTE Gateway

I just got my Verizon LTE Wireless Gateway set up today. Internet works great on it. But I'm trying to get my Orbi and Satellite connected and running into difficulties. The Verizon Gateway won't even assign the Orbi Router an IP address...I have the yellow Ethernet port of the Orbi plugged into the LAN1 port on the VZ Gateway, and I'm not getting any connectivity lights. Looking at both the VZ web GUI and the Orbi app, it looks like the cable isn't even connected. I've used that same cable to connect my laptop to the VZ gateway, though, and it assigns it an IP, no problem. Happy, blinkly connectivity lights. Any ideas are greatly appreciated.