> As you properly guessed, this model is quite different from what we are used to. Yes, it takes a while to get the idea that the hardware is just an accelerator for what the Linux stack can already do. And if the switch cannot do some feature, pass the frame to Linux so it can handle it. You need to keep in mind that there could be other ports in the bridge than switch ports, and those ports might be interested in the multicast traffic. Hence the CPU needs to see the traffic. But IGMP snooping can be used to optimise this. But you still need to be careful, eg. IPv6 Neighbour discovery has often been broken on mv88e6xxx because we have been too aggressive with filtering multicast. Andrew
