> Running tcpdump, unless you use the -p flag, will put the NIC into > promiscuous mode. This means you'll pick up all multicast frames > (and everything else) regardless of how the NIC's multicast filter is > programmed. > Just joining a group will not put the interface into promiscuous mode: > it'll just program the NIC's multicast filter to accept that particular > group. That is of course unless someone a) broke the driver for your > NIC or b) broke SIOCADDMULTI support somewhere in the stack. Until you > tell us what NIC you have, there's no easy way to tell which is the > case. Ok, tcpdump without -p shows the multicast packets, tcpdump with -p does not. Does that mean I have not joined the multicast group properly? Is this something that was fixed sometime after BETA3? This was working for a while in 5.4-RELEASE as well as since 6.0-BETA1. JoshReceived on Fri Sep 30 2005 - 02:24:23 UTC
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