Re: [Bridge] [PATCH] [bridge] Add split horizon

[Ross Vandegrift <ross@kallisti.us>]

On Sat, Jun 13, 2009 at 08:32:31PM +0200, Joakim Tjernlund wrote:
> Ross Vandegrift <ross@kallisti.us> wrote on 13/06/2009 18:56:40:
> >
> > On Sat, Jun 13, 2009 at 05:45:47PM +0200, Joakim Tjernlund wrote:
> > > I would really like to read up on the claim that each VLAN is also a physical port.
> > > Any pointers?
> >
> > Note that you added the VLAN tagged subinterface to the bridge.  Using
> > brctl's functions, you'll be able to see the port numbers assigned to
> > each port.  You'll be able to display the MACs learned on each port,
> > along with each port's ID.
> 
> And ...? Sorry, but I don't see anything about VLAN==physical interface.
> I suppose the MACs learned will be different, but how does that matter?

Let me put it another way.  What distinguishes eth0, eth1, and eth0.10
when you bridge them together?

Nothing - one gets untagged frames from the interface associated with
eth0.  One gets untagged frames from the interface associated with
eth1.  The last gets tagged frames from the interface associated with
eth0.  I don't see how there's any distinction between these roles.
Each is just a source & sink for frames.  Some end up using the same
cable, but who cares?

-- 
Ross Vandegrift
ross@kallisti.us

"If the fight gets hot, the songs get hotter.  If the going gets tough,
the songs get tougher."
	--Woody Guthrie