Designing a Deployable Future Internet: the Locator/Identifier Separation Protocol (LISP) case

The Internet has been created for interconnecting few hundreds networks, but is now close to one billion hosts, grouped in 40,000 Autonomous Systems, using more than 400,000 prefixes. Such a situation raises scalability issues that have driven both academia and industry to review the current Internet Architecture in the light of the Locator/Identifier Split paradigm. In particular, the Internet Engineering Task Force (IETF) has adopted and is actively designing and developing the Locator/ID Separation Protocol (LISP). However, changing the routing and addressing architecture of the Internet in an incrementally deployable manner Several constraints impact such a design. We use LISP as reference to describe the different design choices necessary to achieve deployability, which is the ultimate goal of any new Future Internet architecture. Furthermore, we showcase several alternate usages of LISP, which go beyond improving the Internet scalability.