On Fri, Aug 6, 2021 at 08:15 AM, Kyle Goyer wrote:
I'm sure this is way over simplifying it but... IGMP Proxy effectively forwards all IGMP traffic through the router. ?which means that the port the processor is plugged into would subscribe to all the multicast groups so that it could forward that traffic on incase something on the other side of the router needs it. ?So if it subscribed to all the NVX streams then the port would be flooded and unusable.
I have not run into a need to have IGMP proxy on but I have forgotten to disable it before connecting NVX so it seems like it would be better to be disabled from the factory but maybe theres a use-case I havent considered.
That is what I suspected would happen.? I have used IGMP proxy in conjunction with a mdns repeater in the routers we install to access Sonos from another subnet.? But that is more involved then simply turning IGMP proxy on.? Your also have to tell the router which VLAN is the upstream, which is the downstream, and number of other things to get it to work.? And then your have to tell the mDNS repeater which VLANs to repeat.?? So it is more involve that just flipping a switch to implement IGMP proxy.
Which begs the question, why have IGMP proxy enable by default particularly when you have a Crestron processor with one LAN port and no ability to do VLANs.? I cannot imagine a situation where it needs to be turned on in anything but a router and then only in very unique situations.
