Cisco Systems Cisco Systems Cisco Systems Cisco Systems UPC/BarcelonaTech This document describes the Locator/ID Separation Protocol (LISP) data-plane encapsulation protocol. LISP defines two namespaces, End- point Identifiers (EIDs) that identify end-hosts and Routing Locators (RLOCs) that identify network attachment points. With this, LISP effectively separates control from data, and allows routers to create overlay networks. LISP-capable routers exchange encapsulated packets according to EID-to-RLOC mappings stored in a local map-cache. The map-cache is populated by the LISP Control-Plane protocol [REF_TO_RFC6833bis]. LISP requires no change to either host protocol stacks or to underlay routers and offers Traffic Engineering, multihoming and mobility, among other features.