ALTO Protocol
draft-ietf-alto-protocol-15
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Active Internet-Draft (alto WG)
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2013-05-08
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draft-penno-alto-protocol
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IETF
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Proposed Standard
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Spencer Dawkins
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Enrico Marocco (enrico.marocco@telecomitalia.it) is the document shepherd.
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alto-chairs@tools.ietf.org, draft-ietf-alto-protocol@tools.ietf.org
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ALTO WG R. Alimi, Ed.
Internet-Draft Google
Intended status: Standards Track R. Penno, Ed.
Expires: November 9, 2013 Cisco Systems
Y. Yang, Ed.
Yale University
May 8, 2013
ALTO Protocol
draft-ietf-alto-protocol-15.txt
Abstract
Applications using the Internet already have access to topology
information of Internet Service Provider (ISP) networks. For
example, views to Internet routing tables at looking glass servers
are available and can be practically downloaded to many application
clients. What is missing is knowledge of the underlying network
topologies from the point of view of ISPs (henceforth referred as
Providers). In other words, what a Provider prefers in terms of
traffic optimization -- and a way to distribute it.
The Application-Layer Traffic Optimization (ALTO) Service provides
network information (e.g., basic network location structure and
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 of
the maps.
This document describes a protocol implementing the ALTO Service.
Although the ALTO Service would primarily be provided by the network
service providers (e.g., Internet service providers), content service
providers and third parties could also operate an ALTO service.
Applications that could use this service are those that have a choice
to which end points to connect. 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 November 9, 2013 [Page 1]
Internet-Draft ALTO Protocol May 2013
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
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 9, 2013.
Copyright Notice
Copyright (c) 2013 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
to this document. Code Components extracted from this document must
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 November 9, 2013 [Page 2]
Internet-Draft ALTO Protocol May 2013
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1. Background and Problem Statement . . . . . . . . . . . . . 6
1.2. Solution Benefits . . . . . . . . . . . . . . . . . . . . 6
1.2.1. Service Providers . . . . . . . . . . . . . . . . . . 6
1.2.2. Applications . . . . . . . . . . . . . . . . . . . . . 7
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1. Endpoint . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2. Endpoint Address . . . . . . . . . . . . . . . . . . . . . 7
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