A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Third-Party ALTO Server Discovery (3pdisc)
Author(s) : Sebastian Kiesel
Kilian Krause
Martin Stiemerling
Filename : draft-kist-alto-3pdisc-02.txt
Pages : 14
Date : 2013-02-11
Abstract:
The goal of Application-Layer Traffic Optimization (ALTO) is to
provide guidance to applications that have to select one or several
hosts from a set of candidates capable of providing a desired
resource. ALTO is realized by a client-server protocol. Before an
ALTO client can ask for guidance it needs to discover one or more
ALTO servers that can provide suitable guidance.
This document specifies a procedure for third-party ALTO server
discovery, which can be used if the ALTO client is not co-located
with the actual resource consumer, but instead embedded in a third
party such as a peer-to-peer tracker.
This algorithm takes a resource consumer's IP address as argument,
performs several DNS lookups (for PTR, SOA, and U-NAPTR resource
records), and produces URIs of ALTO servers that are able to give
reasonable ALTO guidance to a resource consumer willing to
communicate using this IP address.
Starting with draft-kist-alto-3pdisc-02 the algorithm has
significantly changed compared to previous versions of this document,
including draft-kiesel-alto-3pdisc-* and
draft-ietf-alto-server-discovery-*. The new algorithm does not try
"DNS tree climbing" and it does not neccessarily rely on PTR records,
i.e., it can also produce results if no PTR records are populated in
the DNS, for example when IPv6 privacy exensions are in use.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-kist-alto-3pdisc
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-kist-alto-3pdisc-02
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-kist-alto-3pdisc-02
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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