[Bug 234472] CARP using wrong multicast MAC destination (was: Missing outgoing CARP traffic on interface)

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Wed May 8 15:58:36 UTC 2019


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234472

Kristof Provost <kp at freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |Not A Bug
             Status|New                         |Closed

--- Comment #14 from Kristof Provost <kp at freebsd.org> ---
(In reply to Andreas Pflug from comment #12)
Having thought about this some more I think even more strongly that changing
the behaviour would be wrong.

Multicast is a routable protocol, even if the Ethernet address resolution is
different from unicast traffic. There may also be use cases for the current
behaviour (and route-to *does* do exactly what it's designed and documented to
do).
Moreover, the problem you ran into is specific to Ethernet, so introducing
changes in a layer 3 firewall for the sake of one layer 2 protocol is also the
wrong strategy.

Rodney is also correct that this is a policy question which you can express in
your rules.

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