http://www.rfc-editor.org/rfc/rfc8113.txt
RFC 8113: Locator/ID Separation Protocol (LISP): Shared Extension Message & IANA Registry for Packet Type Allocations, M. Boucadair, C. Jacquenet2017-03-01T23:00:00-00:00This document specifies a Locator/ID Separation Protocol (LISP) shared message type for defining future extensions and conducting experiments without consuming a LISP packet type codepoint for each extension. It also defines a registry for LISP Packet Type allocations, thus updating RFC 6830.