"Konstantin KABASSANOV" <Konstantin.Kabassanov@lip6.fr> writes:

> If there is a packet with the same source and destination mac address
> (typically a packet wrongly sent over an interface different from the
> loopback), what could be the right behaviour of the kernel? Is the packet
> treated twice (no way to make difference between incoming and outgoing
> direction)?

If I understad you correctly you are asking what should a system do if
it recives a packet with the same src and dst MAC address ?
Then I guess, it should be dropped.

-- 
  Rui Paulo			<rpaulo@{NetBSD{,-PT}.org,fnop.net}>