Hi, the socket is actually for joining the mcast group to draw the traffic into the NIC. Tcpdump is just for watching if there are any packets flowing through the NIC. Correct me if I'm wrong, I can't join a mcast group with just topdump :-)

In reply to Re^4: Same multicast packet received by multiple NICs by sophate
in thread Same multicast packet received by multiple NICs by sophate

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