I am having LAN trouble with a setup that has two Moca devices in addition to the Fios Gateway.
My previous setup had coax from the ONT into a G1100 Gateway. Coax went into an Actiontec ECB6200 Moca device on another floor. Ethernet came out of the ECB6200 and into a network switch. Everything worked great and all of my devices could see each other on one happy network. The devices plugged into the GW by ethernet could see the devices connected to the Actiontec ECB6200 Moca device just fine.
When I upgraded to gigabit Fios, the technician moved my G1100 gateway right next to the ONT, and connected the two with Ethernet. He added a Fios Network Extender (FNE) - WCB6200Q so he would not have to r running a new long Ethernet cable to a higher floor. Now all of my devices can see the internet just fine but the devices connected to the WCB6200 FNE are not able to see the devices that connect to the ECB6200 nor vice versa. This wreaks havoc on smart speakers and a few other things that need to be on the same local network to cooperate.
Does anyone have any troubleshooting tips for this kind of setup?