Cisco is all set to use LISP to talk about programmability and network virtualization. LISP or Location/Identifies Separation Protocol is a method by which the number of entries in the BGP routing tables of core routers can be reduced. This protocol was authored in 2009 and proposes a “map and encapsulate” tunneling mechanism that can be used by the internet’s edge and core routers.
It works by separating a block of IP addresses into 2 functions – identifying systems using the IP address and locating where these systems connect to the internet. The separation between routing locator and identification enables LISP powered routers in aggregating location information thereby leading to a lowering of need for storage in core routers.
LISP can therefore be used for applications such as mobility, better scalability, multihoming and customer managed VPN provisioning. LISP is already being used by NJEDge.Net which is a academic and research consortium.
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