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Date:      Fri, 24 Jan 2020 03:12:34 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 243554] multicast packets not seen on PHY bridge member
Message-ID:  <bug-243554-227-X63stIX2RS@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-243554-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-243554-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243554

--- Comment #3 from Kyle Evans <kevans@freebsd.org> ---
Created attachment 211002
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D211002&action=
=3Dedit
diff against releng/12.1

It looks similar to some of the other observability problems I've fixed in =
the
past. While the conventional setup is that the bridge alone would get the IP
and not igb1, I think being able to observe the packets in question on igb1=
 is
still important for debugging purposes.

There's also an incorrect looking comment in if_bridge.c that I'll dig into=
 a
little later; in bridge_forward(), we claim that tapping multicast/broadcast
traffic isn't important because it will be reinjected into ether_input. I c=
an't
see how this is true. AFAICT these packets will travel bridge_broadcast() ->
bridge_enqueue() -> if_transmit OR just bridge_enqueue() -> if_transmit, wh=
ich
will typically not involve ether_input.

--=20
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