The approach in the current LISP draft still relies on ICMPs coming from anonymous network middleboxes (which Dino himself has said that we cannot depend on), and provides insufficient
I did not say that. I said you cannot depend on ICMP Unreachables. But ICMP TooBig and Time-Exceeded message are sent and are more dependable. That is, they can get lost when they are transmitted since they are single transmitted datagrams. But at least they are sent.
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