Third-Party ALTO Server Discovery (3pdisc)
draft-kist-alto-3pdisc-01

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ALTO                                                           S. Kiesel
Internet-Draft                                   University of Stuttgart
Intended status: Experimental                             M. Stiemerling
Expires: April 25, 2013                                  NEC Europe Ltd.
                                                        October 22, 2012

               Third-Party ALTO Server Discovery (3pdisc)
                       draft-kist-alto-3pdisc-01

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.

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Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on April 25, 2013.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Third-Party ALTO Server Discovery Procedure Overview . . . . .  5
   3.  Third-party ALTO Server  Discovery Procedure Specification . .  6
     3.1.  Step 1: Retrieving the Domain Name . . . . . . . . . . . .  7
     3.2.  Step 2: U-NAPTR Resolution . . . . . . . . . . . . . . . .  7
   4.  Deployment Considerations  . . . . . . . . . . . . . . . . . .  8
     4.1.  IPv4 PTR lookup  . . . . . . . . . . . . . . . . . . . . .  8
       4.1.1.  Private customers or very small businesses . . . . . .  8
       4.1.2.  Medium-size customer networks  . . . . . . . . . . . .  8
       4.1.3.  Large Customers  . . . . . . . . . . . . . . . . . . .  9
     4.2.  IPv6 PTR lookup  . . . . . . . . . . . . . . . . . . . . .  9
   5.  Operational Considerations . . . . . . . . . . . . . . . . . . 10
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 12
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 13
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 13
   Appendix A.  Contributors List and Acknowledgments . . . . . . . . 14
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

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