Looks like the IETF P2PSIP working group is having some kind of protocol deathmatch. Some of these are just DHTs, while others are more general.

Peer-to-Peer Protocol (P2PP) http://tools.ietf.org/html/draft-baset- p2psip-p2pp-00

"This document defines the Peer-to-Peer Protocol (P2PP), an
   application-layer protocol, for creating and maintaining an overlay
   of participant nodes.  The overlay can be created using various
   structured and unstructured peer-to-peer protocols such as Chord,
   Pastry, Kademlia, Gnutella, and Gia."

REsource LOcation And Discovery (RELOAD) http://tools.ietf.org/html/ draft-bryan-p2psip-reload-01

"This document outlines the motivation, requirements, and
   architectural design for a extensible and lightweight distributed
REsource LOcation And Discovery (RELOAD) protocol. RELOAD is a Peer-
   to-Peer (P2P) based approach for registration and resource discovery
   using distributed hash tables maintained with binary messages."

Address Settlement by Peer to Peer http://tools.ietf.org/html/draft- jennings-p2psip-asp-00

"This document defines Address Settlement by Peer-to-Peer (ASP), a
   peer-to-peer (P2P) binary signaling protocol for usage on the
   Internet.  A P2P signaling protocol provides its clients with an
   abstract hash table service between a set of cooperating peers that
   form the P2P network. "

Extensible Peer Protocol (XPP) http://tools.ietf.org/html/draft- marocco-p2psip-xpp-00

"This document defines the Extensible Peer Protocol (XPP), a
   lightweight binary protocol for end-to-end sessions between peers in
   distributed overlay networks.  One of the main goals while creating
   this protocol was support for nodes located behind firewalls and
   NATs.  XPP therefore uses UDP and allows endpoints to simultaneously
   initiate sessions.  Given the choice of the underlying protocol
   (UDP), XPP also defines mechanisms for message fragmentation and
   reliability."

A Distributed Transport Function in P2PSIP using HIP for Multi-Hop Overlay Routing http://tools.ietf.org/html/draft-matthews-p2psip-hip- hop-00

"This document examines a P2PSIP architecture where the peer-to-peer
   (P2P) layer is separate from and lies below the SIP layer.  We
   discuss the functions of the P2P layer in such an architecture, and
   focus in on the Distributed Transport function - the function that
   allows a peer to exchange messages with any other peer in the
   overlay, even in the presence of NATs. ... the
   Host Identity Protocol (HIP) already provides a number of these
features. We then propose extensions to HIP that allow it to provide
   the missing features.  We discuss how a complete P2PSIP architecture
   can be built around HIP, and contrast this approach with other
   approaches for implementing a P2P layer."

Wes Felter - [EMAIL PROTECTED] - http://felter.org/wesley/

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