Stephen,
Lets rephrase the question so that it's agnostic on the map/route issue: 2a. What's the maximum acceptable time in which one EID may be inaccessible to another during change propagation due to a path failure?A second or two at most, ideally, because folks are going to try to run VoIP over this system. The good news is that it's not "zero" or "50ms" like it would have been a decade ago, as cell phones have conditioned people to expect occasional audio loss they wouldn't have accepted when accustomed to the general high reliability of the wireline PSTN.
All the work on MPLS and IP-based fast reroute shows that the best way to deal quickly with link failures is to recover *locally*. Path failure should be solved by the routing system and not affect the mapping system. Let's not overload the mapping system...
Olivier -- http://inl.info.ucl.ac.be , UCLouvain, Belgium -- to unsubscribe send a message to rrg-request@psg.com with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg