ALTO Performance Cost Metrics
draft-ietf-alto-performance-metrics-04

Document Type Active Internet-Draft (alto WG)
Last updated 2018-06-16
Replaces draft-wu-alto-te-metrics
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ALTO Working Group                                                 Q. Wu
Internet-Draft                                                    Huawei
Intended status: Standards Track                                 Y. Yang
Expires: December 18, 2018                               Yale University
                                                                  Y. Lee
                                                                D. Dhody
                                                                  Huawei
                                                          S. Randriamasy
                                                         Nokia Bell Labs
                                                           June 16, 2018

                     ALTO Performance Cost Metrics
                 draft-ietf-alto-performance-metrics-04

Abstract

   Cost Metric is a basic concept in Application-Layer Traffic
   Optimization (ALTO).  It is used in both the Cost Map Service and the
   Endpoint Cost Service.

   Different applications may benefit from different Cost Metrics.  For
   example, a Resource Consumer may prefer Resource Providers that offer
   a low delay delivery to the Resource Consumer.  However the base ALTO
   protocol [ALTO] has documented only one single cost metric, i.e., the
   generic "routingcost" metric (Sec. 14.2 of ALTO base specification
   [ALTO]).

   This document, proposes a set of Cost Metrics, derived and aggregated
   from routing protocols with different granularity and scope, such as
   BGP-LS,OSPF-TE and ISIS-TE, or from end-to-end traffic management
   tools.  It currently documents Network Performance Cost Metrics
   reporting on network delay, jitter, packet loss, hop count, and
   bandwidth.  These metrics may be exposed by an ALTO Server to allow
   applications to determine "where" to connect based on network
   performance criteria.  Additional Cost Metrics involving ISP specific
   considerations or other network technologies may be documented in
   further versions of this draft.

   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].

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Internet-Draft        ALTO Performance Cost Metrics            June 2018

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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   This Internet-Draft will expire on December 18, 2018.

Copyright Notice

   Copyright (c) 2018 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Challenges on data sources and computation of ALTO
       performance metrics . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Data sources Challenge  . . . . . . . . . . . . . . . . .   5
     2.2.  ALTO performance metrics Computation Challenges . . . . .   5
       2.2.1.  Configuration Parameters Challenge  . . . . . . . . .   5
       2.2.2.  Availability of end to end path values  Challenge . .   6
   3.  Cost Metric: POWDelay . . . . . . . . . . . . . . . . . . . .   6
   4.  Cost Metric: RTT  . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Cost Metric: PDV  . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Cost Metric: Hop Count  . . . . . . . . . . . . . . . . . . .  12
   7.  Cost Metric: Packet Loss  . . . . . . . . . . . . . . . . . .  14
   8.  Traffic Engineering Performance Cost Metrics  . . . . . . . .  16
     8.1.  Cost Metric: Link Maximum Reservable Bandwidth  . . . . .  17

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