David -
A pull system can potentially provide for much higher rates of change than a push system. As I believe has been mentioned in the past, a pull system (if augmented by forwarding) could even be used for mobility.
Yes. The advantage of a reactive (pull) mapping system over a proactive (push) one is that the former can provide tailored responses, such as responses that indicate which in a list of locators is currently preferred. It thus provides a tool for traffic engineering of incoming packets. This is an advantage, albeit a small one given that a locator can be changed in-band within a round-trip after mapping resolution. Regarding mobility support of a reactive mapping system: It would work for local mobility within an edge network. But not for global mobility. - Christian -- 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