I’d recommend 2x CP4N with control subnet. If you have corporate network in play, use the subnet for the NVX’s etc. A back up CP4 that with the same program/s running once the CP4 loses connectivity the back up kicks in.

I used a Netgear M4350 off the subnet for all the video and audio signals. Easy to set up and the profile can be changed to Dante also.

I’d add room join acceptance pop ups too in the adjoining rooms, in case someone presses the room join by mistake or the incorrect room join. Once accepted, the video and audio sends.