Internet Technical Committee (ITC)

The ever-increasing growth of the Internet is raising scalability issues mainly related to inter-domain routing, creating an increasing concern on the scalability of today’s Internet architecture. These issues are mostly due to the use of a single numbering space, namely the IP addressing space, for both host transport sessions identification and network routing. In addition to the single numbering space, multihoming and Traffic Engineering (TE) are making BGP’s routing tables in the Default Free Zone (DFZ) to grow restlessly to a level where manageability and performances start to be critical.

To tackle these issues, there is a fairly amount of activity around the approach based on the separation of the end-systems’ addressing space (the identifiers) and the routing locators’ space. This separation is perceived as the basic component of the future Internet architecture . The use of a separate numbering space for routing locators will allow to assign Provider Independent (PI) addresses in a topologically driven manner, improving aggregation while reducing the number of globally announced prefixes. Furthermore, it will also allow to perform both in- bound and outbound flexible TE, by setting tunnels be- tween different locators based on several different metrics or policies. 

In the framework of ITC Special Interest Groups activities, the Locator/ID Separation SIG has been created in 2012, aiming at gathering and disseminating activities about the Locator/ Identifier Separation paradigm. 

LISP SIG Reports:


  • RFC 6830 D. Farinacci, V. Fuller, D. Meyer, D. Lewis, "The Locator/ID Separation Protocol (LISP)", January 2013
  • RFC 6831 D. Farinacci, D. Meyer, J. Zwiebel, S. Venaas, "The Locator/ID Separation Protocol (LISP) for Multicast Environments", January 2013
  • RFC 6832 D. Lewis, D. Meyer, D. Farinacci, V. Fuller, "Interworking between Locator/ID Separation Protocol (LISP) and Non-LISP Sites", January 2013
  • RFC 6833 V. Fuller, D. Farinacci, "Locator/ID Separation Protocol (LISP) Map-Server Interface" January 2013
  • RFC 6834 Luigi Iannone, Damien Saucez, Olivier Bonaventure, "Locator/ID Separation Protocol (LISP) Map-Versioning", January 2013
  • RFC 6835 D. Farinacci, D. Meyer, "The Locator/ID Separation Protocol Internet Groper (LIG)", January 2013
  • RFC 6836 V. Fuller, D. Farinacci, D. Meyer, D. Lewis, "Locator/ID Separation Protocol Alternative Logical Topology (LISP+ALT)", January 2013
  • RFC 6837 E. Lear, "NERD: A Not-so-novel Endpoint ID (EID) to Routing Locator (RLOC) Database", January 2013
  • RFC 7052 G. Schudel, A. Jain, V. moreno, "Locator/ID Separation Protocol (LISP) MIB", October 2013
  • RFC 7215 L. Jakab, A. Cabellos-Aparicio, F. Coras, J. Domingo-Pascual, D. Lewis, "Locator/Identifier Separation Protocol (LISP) Network Element Deployment Considerations", April 2014