Keith,
> sort of.  MPLS with globally-scoped tags,  and a database of 
> [course] (think subnet sized) identifer to locator mappings that is 
> distributed via BGP.  border routers look at the destination host
> identifier, find the set of locators that correspond to it, and pick
> the best locator given current routing conditions.  
>   
Haha.  Check out some stuff Professor Dave Cheriton did at
http://www-dsg.stanford.edu/triad/

It smells remarkably like pathalias to me ;-)

Eliot

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