How effectively can multicast traffic be blocked on a SSID that does not need other devices to communicate with each other? Anyone offer any insights, I have included some rules I want to experiment with but wanted to hear feedback from others that may have some knowledge in this area, Or can offer something better in the way of rules. I am wanting to block IPv4 and IPv4 multicast traffic.
|Name||Type Address||Netmask||Inverted *|
All Multicast Network 188.8.131.52 184.108.40.206 No
Multicast LLMNR Network 220.127.116.11 255.255.255.255 No
Multicast MDNS Network 18.104.22.168 255.255.255.255 No
Multicast SSDP Network 22.214.171.124 255.255.255.255 No
We have setup rules like this for instances where printers and the like spam multicast. It's pretty effective obviously depending on what you want to accomplish. I would say AP to wireless medium, it can definitely help channel utilization.
However, I would recommend IGMP snooping where possible in the LAN to prevent the AP from ever getting multicast if there are no members present. And then you could try the multicast rate optimization on the SSID to improve performance if clients actually need multicast.