On Mon, 31 Aug 2015 12:12:16 -0400, Chris Marget said: > At first, I thought this was a bug, but then learned that RFCs 1112, 1122 > and 1812 all specify that ICMP unreachables not be sent in response to > multicast packets.
> I'm struggling to grok the rationale behind not sending unreachables in > response to multicast packets. It seems to me that our networks put IPv4 > multicast speakers in a position where it's impossible for them to do the > right thing. For the exact same reason that replying to an ICMP Echo Request sent to your broadcast address is generally considered a Bad Idea. The obvious solution is "Doctor, it hurts when I do that" "Don't do that anymore". Don't send multicast packets with DF set.
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