We've argued here about whether it's reasonable to assume >1500 byte MTU on transit links, when running a LISP-type solution.
And if the assumption doesn't hold, then you fragment before encapsulate. That is specified in the main LISP spec.
Dino
Here's a data point about the real world, as far as Internet exchange points at the southern end go: http://list.waikato.ac.nz/pipermail/nznog/2008-September/014471.html Brian -- 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
-- 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