ALTO Performance Cost Metrics
draft-wu-alto-te-metrics-08

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ALTO Working Group                                                 Q. Wu
Internet-Draft                                                    Huawei
Intended status: Standards Track                                 Y. Yang
Expires: January 8, 2017                                 Yale University
                                                                  Y. Lee
                                                                D. Dhody
                                                                  Huawei
                                                          S. Randriamasy
                                                         Nokia Bell Labs
                                                            July 7, 2016

                     ALTO Performance Cost Metrics
                      draft-wu-alto-te-metrics-08

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.  Future extensions to ALTO may also use Cost
   Metric.

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

   In this document, we 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 tool.  We currently define 11 new Performance Metric to
   measure network delay, jitter, packet loss, hop count, and bandwidth.
   The metrics defined in this document provide a relatively
   comprehensive set of Cost Metrics for ALTO and allow applications to
   determine "where" to connect based on end to end network performance
   criteria.  Additional Cost Metrics such as financial cost metrics may
   be defined in other documents.

   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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Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on January 8, 2017.

Copyright Notice

   Copyright (c) 2016 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Data sources, computation of defined cost metrics . . . . . .   5
     2.1.  Data sources  . . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  Computation of metrics  . . . . . . . . . . . . . . . . .   5
   3.  Cost Metric: Delay  . . . . . . . . . . . . . . . . . . . . .   6
   4.  Cost Metric: Delay Jitter . . . . . . . . . . . . . . . . . .   7
   5.  Cost Metric: Packet Loss  . . . . . . . . . . . . . . . . . .   9
   6.  Cost Metric: Hop Count  . . . . . . . . . . . . . . . . . . .  11
   7.  Cost Metric: Bandwidth  . . . . . . . . . . . . . . . . . . .  13
   8.  Cost Metric: Maximum Bandwidth  . . . . . . . . . . . . . . .  14
   9.  Cost Metric: Maximum Reservable Bandwidth . . . . . . . . . .  16
   10. Cost Metric: Unreserved Bandwidth . . . . . . . . . . . . . .  18
   11. Cost Metric: Residue Bandwidth  . . . . . . . . . . . . . . .  21
   12. Cost Metric: Available Bandwidth  . . . . . . . . . . . . . .  22

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