RT-AX58U - allow devices on a Guest network to communicate with each other?

[MDL]

I would like a group of devices to be able to talk to each other and the Internet but not to the Internal network. Is there a way to allow internal communication on a Guest network? Or is there a better way?

 

[icodehead]

This will allow devices on the same Guest network to communicate with each other.
I disable ap_isolate using the following commands to allow my Chromecast devices to connect through Guest 2 wireless network.
Use the program called Putty to log in to SSH (Admin/System Enable SSH).
Set IP and port
Login with username and pw

nvram show | grep isolate

nvram set wl0.2_ap_isolate=0
nvram set wl1.2_ap_isolate=0
nvram commit
reboot