Routers and multicast discovery

[Cebolla]

Indeed, same sort of UPnP discovery issues with older firmware in BT Home Hubs.
Thankfully, I now have a working BT Home Hub 4 Type A (firmware/software version 4.7.5.1.83.8.130.1.26.1.1) - doesn't have any IGMP snooping nor multicast fowarding settings.

A common issue with some wireless routers, is that the wired connected UPnP supporting devices can see other wired connected UPnP devices and similarly wirelessly connected UPnP devices can see other wirelessly connected UPnP devices, so UPnP discovery seemingly working ok. The problems comes with these routers having UPnP discovery failing accross the wired/wireless portions of the network, such that the wired UPnP supporting devices can't see the wirelessly connected ones and vice versa.

Incidentally, you need to make sure you are testing with a true UPnP control point on the wireless Android or iOS device, rather than relying on the streamer supplied app. This is because some manufacturers' control apps do not communicate via UPnP and are just remote controlling the streamer via some proprietary mechanism. In these cases it is the streamer itself that is communicating with the UPnP media server, not the remote control app. With both streamer and UPnP media server connected by wire (as they usually are) to the network you won't be testing if the router has any UPnP discovery issues between wired & wirelessly connected devices.