[Bug 243554] multicast packets not seen on PHY bridge member

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243554

--- Comment #3 from Kyle Evans <kevans at freebsd.org> ---
Created attachment 211002
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=211002&action=edit
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 can't
see how this is true. AFAICT these packets will travel bridge_broadcast() ->
bridge_enqueue() -> if_transmit OR just bridge_enqueue() -> if_transmit, which
will typically not involve ether_input.

-- 
You are receiving this mail because:
You are the assignee for the bug.