Infrastructure to Application Information Exposure
draft-song-alto-i2rs-00

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ALTO                                                             H. Song
Internet-Draft                                                    Y. Lee
Intended status: Informational                                    Huawei
Expires: August 22, 2013                                    Feb 18, 2013

           Infrastructure to Application Information Exposure
                        draft-song-alto-i2rs-00

Abstract

   This document describes the scenarios that applications can use the
   network layer especially the network routing system exposed
   information, so as to optimize application layer traffic.  The use
   cases in this document include the ISP broadband network (using P2P
   and CDN as examples) and the data center network.  And this document
   also describes which information should be collected for
   ALTO[I-D.ietf-alto-protocol] service, and eventually optimize the
   traffic.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on August 22, 2013.

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   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
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   (http://trustee.ietf.org/license-info) in effect on the date of
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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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
     3.1.  ISP network . . . . . . . . . . . . . . . . . . . . . . . . 3
     3.2.  Data Center Network . . . . . . . . . . . . . . . . . . . . 4
   4.  Open Discussion . . . . . . . . . . . . . . . . . . . . . . . . 6
   5.  Informative References  . . . . . . . . . . . . . . . . . . . . 6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 7

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1.  Introduction

   ALTO protocol is an interface provided to applications, to provide
   guidance when there are more than one application node providing the
   same service, through aggregated network map and cost map.  It
   usually aggregate network locations into PIDs, and assigns lower cost
   value for a PID pair that are topological close.  So when application
   node follows the advice from ALTO server to choose one resource
   provider within a PID that has lower cost from its own PID, with
   higher probability the application node can keep the content request
   and response traffic flow intra domain, which can reduce the
   suffering increasing interdomain traffic for ISPs, and avoid the
   congestion in the backbone network.  More factors for node selection
   can be considered, such as pricing, congestion, and etc.

   In order to achieve the above statements, it needs the underlying
   infrastructure to expose its topology information, malfunction node
   information, link status information, and pricing for path selection
   information to ALTO server, which will either be abstracted as the
   network map or as the impacting input factor of cost map.

2.  Terminology

   I2AEX: Infrastructure to Application Exposure.

   ALTO: application layer traffic optimization.

   IaaS: Infrastructure as a Service.

3.  Use Cases

3.1.  ISP network

   ISP broadband networks are consisted of interconnected autonomous
   systems.  They run BGP protocols between the boarder gateway routers,
   and run IGP protocols intra autonomous systems.  There are core
   routers, and access routers (BRAS) which fullfill the admission
   control through RADIUS servers, the access router connects to
   multiple aggregation switches.  And an aggregation switch connects to
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