[rbridge] Use of 802.1ah Encaps

[Don Fedyk]

Hi Eric

This argument says if you use ANY standard header then it would be a bad
idea.

So you are creating a new forwarding paradigm and the down side of that
as Ali pointed out is now you have to create most of the other things
that go along with new forwarding paradigm.  

Don  

> -----Original Message-----
> From: Gray, Eric [mailto:Eric.Gray at marconi.com] 
> Sent: Tuesday, December 12, 2006 4:29 PM
> 
> Silvano,
> 
> 	IFF we were going to use 802.1ah, it could allow us to  
> use the "back-bone" DA/SA for next-hop/previous-hop and the
> "customer" DA/SA for egress/ingress RBridges.  But that would 
> be using it in a way that is not consistent with the intended
> use of 802.1ah - simply because that usage would make use of 
> the fields in a way that matches the way that your proposed 
> "short-hand" SHIM header would use them.
> 
> 	If you did that, there would be room for using the B-tag
> and I-tag as analogues of your I-VLAN and O-VLAN tags.
> 
> 	I think this is a VERY BAD idea.
> 
> --
> Eric
<snip>