netdev-owner@vger.kernel.org wrote on 10/03/2012 03:28:48 AM:
 

BTW, it seems we dont properly increase UDP MIB counters when a
multicast message is not delivered to at least one socket.

If an interface is in promiscuous mode or there are false
positives in a multicast address filter, wouldn't this count as
"drops" packets that were never intended for this machine?

I think an otherwise valid multicast or broadcast packet that doesn't
have a local receiver is not an error and shouldn't be counted.

                                                        +-DLS