Location Identity Separation Protocol (LISP) is a protocol that separates the location of an end device from its identifier, otherwise known as its IP address. There are several different implementations of LISP. The one we’ll be focusing on is the implementation of LISP as it relates to Cisco’s Overlay Transport Virtualization (OTV). In broader terms, OTV is a new Cisco tunneling protocol that allows the same subnet to exist at two different physical locations, such as two different data centers. LISP is a way to optimize routing to that subnet. It is assumed that the reader has previous knowledge of OTV.
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