The MPLS WG Archive

[Rahul Aggarwal <rahul@redback.com>]

George,

On Thu, Jul 13, 2000 at 01:20:49PM -0400, George Swallow wrote:
> Rahul -
> 
> > It will be nice to hear from the authors what their reasons/motivations are
> > for making this change.
> 
> We removed the 'PoP' operator at the time of the wg last call.  It was
> not well defined and no one had a use for it.  A label stack would be
> required with that.  Once that was removed the label stack became a
> mechanism with no procedures or uses defined.  That seems only to be a
> recipe for encouraging non-interoperability.
> 
> Further folks working on the optical extensions, particularly
> forwarding adjacnecies, found that they had no need of attempting to
> set up more than one level of 'labeling' at a time.  
> 
> So we removed it.  
> 
> If someone comes forward with a genuine, well defined need, it's a
> very simple matter to add another C-type to allow a stack.  

Thanks for the clarification. This seems reasonable. 


> 
> ...George
> 
> ==================================================================
> George Swallow       Cisco Systems                   (978) 244-8143
>                      250 Apollo Drive
>                      Chelmsford, Ma 01824
>