[rbridge] Use of 802.1ah Encaps

[Stewart Bryant]

Gray, Eric wrote:

> Ali/Don,
> 
> 	The use of 802.1ah encapsulation does not intuitively
> suggest itself in the TRILL problem domain for at least two
> reasons:
> 
> 1)	Provider Back-bone Bridging intuitively seems out of
> 	place in solutions aimed at enterprise networks - and
> 	this would seem to be even more true for solutions 
> 	aimed at "plug-and-play" applicability.

... but what has that to do with the encapsulation mechanism?

> 
> 2)	Use of 802.1ah encapsulation assumes "bridging" of the
> 	tunneled frame transparently from edge-to-edge - and
> 	this would seem to go counter to the idea of using a
> 	link-state routing protocol for shortest path routing
> 	of MAC frames.

Why so? There are many existance proofs that the choice of
encap and the choice of topology protocol are othogonal.
The only requirement is that the encap carries the necessary
per packet information.

- Stewart