ALTO Protocol
draft-ietf-alto-protocol-12

The information below is for an old version of the document
Document Type Active Internet-Draft (alto WG)
Last updated 2012-07-11
Replaces draft-penno-alto-protocol
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Send notices to alto-chairs@tools.ietf.org, draft-ietf-alto-protocol@tools.ietf.org
ALTO WG                                                    R. Alimi, Ed.
Internet-Draft                                                    Google
Intended status: Standards Track                           R. Penno, Ed.
Expires: January 12, 2013                                  Cisco Systems
                                                            Y. Yang, Ed.
                                                         Yale University
                                                           July 11, 2012

                             ALTO Protocol
                    draft-ietf-alto-protocol-12.txt

Abstract

   Networking applications today already have access to a great amount
   of Inter-Provider network topology information.  For example, views
   of the Internet routing table are easily available at looking glass
   servers and entirely practical to be downloaded by clients.  What is
   missing is knowledge of the underlying network topology from the ISP
   or Content Provider (henceforth referred as Provider) point of view.
   In other words, what a Provider prefers in terms of traffic
   optimization -- and a way to distribute it.

   The ALTO Service provides network information (e.g., basic network
   location structure, preferences of network paths) with the goal of
   modifying network resource consumption patterns while maintaining or
   improving application performance.  The basic information of ALTO is
   based on abstract maps of a network.  These maps provide a simplified
   view, yet enough information about a network for applications to
   effectively utilize them.  Additional services are built on top the
   maps.

   This document describes a protocol implementing the ALTO Service.
   Although the ALTO service would primarily be provided by the network
   operator (e.g., an ISP), content providers and third parties could
   also operate this service.  Applications that could use this service
   are those that have a choice in connection endpoints.  Examples of
   such applications are peer-to-peer (P2P) and content delivery
   networks.

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

Alimi, et al.           Expires January 12, 2013                [Page 1]
Internet-Draft                ALTO Protocol                    July 2012

   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 January 12, 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
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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.

Alimi, et al.           Expires January 12, 2013                [Page 2]
Internet-Draft                ALTO Protocol                    July 2012

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  6
     1.1.  Background and Problem Statement . . . . . . . . . . . . .  6
     1.2.  Design History and Merged Proposals  . . . . . . . . . . .  6
     1.3.  Solution Benefits  . . . . . . . . . . . . . . . . . . . .  7
       1.3.1.  Service Providers  . . . . . . . . . . . . . . . . . .  7
       1.3.2.  Applications . . . . . . . . . . . . . . . . . . . . .  7
   2.  Architecture . . . . . . . . . . . . . . . . . . . . . . . . .  7
     2.1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  8
       2.1.1.  Endpoint . . . . . . . . . . . . . . . . . . . . . . .  8
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