Hi @debrajray ,
if your baseline Verizon modem/router is generating two different LANs (for audio and non-audio) on the same subnet, can't you get Roon to discover across LANs and turn off the non-Eero wifi that you've mentioned?
So it may not have this all correct but here goes:
The Verizon Modem is only generating one LAN. But the audio only feed, exiting the Verizon modem, is cleaned first by the JCAT switch, then it enter the DeJitterit unit. Here the DeJitterit creates another wired LAN, and outputs to its included wifi router to spin off a separate wifi network so that I have control over my 2 streamers on this clean network. My Roon core lives on my Grimm MU1, and it can only be seen on the clean network. If I search for my Roon Core while on my main LAN, it is not seen.
This 'clean network' really improved my sound. Taiko does something very similar.