Hi Robert,

> If shutting down the link or lc requires some central management station it 
> does change the full design (perhaps simplifies it vastly) where all of the 
> optimizations can be centrally managed perhaps to varying degrees. 


Shutting down a link does not require centralized management action.  It is 
quite sufficient to coordinate it between the routers on the ends of the link.

Note that one can also conceive of a situation where there is a unilateral, 
ungraceful shutdown too.  That requires zero coordination.

T


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