From owner-freebsd-hackers  Fri Apr 21 16:27: 3 2000
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From: Bill Fenner <fenner@research.att.com>
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To: dmlb@ragnet.demon.co.uk
Subject: Re: Help with SIOCADDMULTI, IFF_ALLMULTI and IFF_PROMISC
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Date: Fri, 21 Apr 2000 16:25:47 -0700
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>What should I do when I see ALLMULTI?

You should go promiscuous to multicast.  If the card doesn't support
that, you should go fully promiscuous and drop unicasts that aren't
to you.  (Make sure you don't block packets that bpf is going to
want to see).

  Bill


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