Cast (chromecast and Apple AirPlay) from different networks

[Tobias_Karsbo]

Hi.
I am setting up one Apple TV and one Chromecast in one of our conference rooms.
They will be connected to our "device network". 
People should then be able to cast and share screen from "Internal Networks" as well from "Guest Network" and "PDA/Phone Network" to these devices.
I guess I somehow have to enable multicast forward and then create rules allowing unicast to those devices from the different networks?
Anyone who has any experience and can share some tips how to do this?

Running R80.30 HA
Thanks
/Tobias 

[PhoneBoy]

Multicast does not forward across networks Unless you use PIM on each hop.
How many hops between the segments?