Hi. I have a partial mesh network composed by Linux nodes. Each linux node may have up to 4 ethernet interfaces, which are exploited to create point-to-point connections with other linux nodes. I have bridged the ethernet interfaces in each node, so that the whole network, which is physically composed by a set of network segments, appears as a single layer-2 domain. I have enabled spanning tree to avoid loops. In this scenario, I would like to exploit the IGMP snooping functionality, but it seems that it is not working properly. I am using iperf to set a multicast source (iperf client) and a few multicast sinks in the network (iperf servers). I am using tcpdump, instead, to check where multicast messages are received. What I notice is that there is apparently no filtering of the multicast messages, that are always flooded in the network. I tried to repeat the test varying the multicast address (paying attention not to get reserved addresses), with and without multicast clients set, with the multicast_router option set to 1 (default) and to 0. To double check that IGMP is working, I have also tried to disable it; the only difference I see is that tcpdump does not show IGMP query messages when the IGMP snooping is disabled. So, I am wondering if the IGMP snooping implementation currently available can deal with my scenario. In particular, I would stress the following points that I think might be relevant: -I have no multicast router in my network (it looks like a single stand-alone lan) -Each node acts as a bridge, so I have multiple bridges in my network, connected each other. Any idea would be greatly appreciated! Massimiliano _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
