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From: "Martin Petraschek" <petraschek@ftw.at>
To: "Lowell Gilbert" <freebsd-questions-local@be-well.ilk.org>
Date: Thu, 07 Apr 2005 18:15:54 +0200
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cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject: Re: IPv6 ICMP multicast response
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On 07 Apr 2005 10:29:07 -0400, Lowell Gilbert wrote:

>"Martin Petraschek" <petraschek@ftw.at> writes:
>
>> The section you are referencing in RFC 2463 is concerning ICMP 
>> ERROR messages. Echo requests/responses are informational 
>> messages, therefore this section does not apply.
>
>Ah.  You're right; I was thinking about error handling because that's
>the code I happened to be working with this morning.  I was looking at
>the error handling code, as well, so when I said it was impossible I
>may have been wrong also.  [The ICMP6_ECHO_REQUEST handling in
>icmp6_input() doesn't do any special handling for multicast at all, so
>I don't see why it doesn't Just Work.]
>
>Sorry for not paying enough attention to the question.

No problem.

Anyway, because of your reply I double checked my setup and found out 
that FreeBSD does indeed answer to multicast ping requests. There just 
does not seem to be a sysctl switch to turn off this behaviour (as there is for 
IPv4).

Thank you,

Martin