Network wide Client isolation works in following way
Clients connected to VLAN-x on same or different AP’s in one network will be isolated from each other. For example :
4 AP’s are there in the network with 3 WLAN’s (with VLAN-10 , 20 and 30 on each WLAN-1,2,3 respectively)
On WLAN-2 network wide isolation is enabled
2 clients(C1 & C2) connected to AP-1 and one more client(say C3) connected to AP-2 on WLAN-2
In this case C1 to C2 communication and C1/C2 to C3 communication is isolated
Clients will automatically talk to gateway mac address and also to MAC address added to the list