http://www.rfc-editor.org/rfc/rfc5203.txt
RFC 5203: Host Identity Protocol (HIP) Registration Extension, J. Laganier, T. Koponen, L. Eggert2008-04-01T23:00:00-00:00This document specifies a registration mechanism for the Host Identity Protocol (HIP) that allows hosts to register with services, such as HIP rendezvous servers or middleboxes. This memo defines an Experimental Protocol for the Internet community.