> I also have a question regarding zone-boundary routers...  Is there
> a distinction between zone-boundary and non-zone-boundary routers?  
> Or can any router that is attached to more than one link dynamically 
> become a zone boundary router due to reconfiguration or topology 
> changes?

A router connected to more than one link always have to deal
with multiple link-local scope zones.

For site-local scope zones it can presumably change dynamically.

  Erik

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