Summary
LISP enables an extensible and highly scalable directory of endpoints. Although this way of thinking about a protocol is counterintuitive at first, LISP is not a routing protocol but a directory service. The LISP architecture follows a demand-based model similar to the Domain Name System and shares many of the scalability characteristics of DNS. The LISP architecture is succinct and simple, yet highly extensible. This extensibility is key in the enablement of advanced network functionality and sets LISP apart from traditional routing protocols, enabling network-centered services that would not be possible otherwise.