ALTO Extension: Path Vector Cost Mode
draft-ietf-alto-path-vector-00

Document Type Active Internet-Draft (alto WG)
Last updated 2017-05-06
Replaces draft-yang-alto-path-vector
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ALTO WG                                                     G. Bernstein
Internet-Draft                                         Grotto Networking
Intended status: Standards Track                                 S. Chen
Expires: November 4, 2017                              Tongji University
                                                                  K. Gao
                                                     Tsinghua University
                                                                  Y. Lee
                                                                  Huawei
                                                                W. Roome
                                                               M. Scharf
                                                                   Nokia
                                                                 Y. Yang
                                                         Yale University
                                                                J. Zhang
                                                       Tongji University
                                                             May 3, 2017

                 ALTO Extension: Path Vector Cost Mode
                   draft-ietf-alto-path-vector-00.txt

Abstract

   The Application-Layer Traffic Optimization (ALTO) Service has defined
   network and cost maps to provide basic network information, where the
   cost maps allow only scalar (numerical or ordinal) cost mode values.
   This document introduces a new cost mode called path-vector to allow
   ALTO clients to support use cases such as capacity regions for
   applications.  This document starts with a non-normative example
   called multi-flow scheduling (or capacity region) to illustrate that
   ALTO cost maps without path vectors cannot provide sufficient
   information.  This document then defines path-vector as a new cost
   mode.

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

   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

Bernstein, et al.       Expires November 4, 2017                [Page 1]
Internet-Draft         ALTO Extension: Path Vector              May 2017

   working documents as Internet-Drafts.  The list of current Internet-
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   This Internet-Draft will expire on November 4, 2017.

Copyright Notice

   Copyright (c) 2017 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Use Case: Capacity Region for Multi-Flow Scheduling . . . . .   5
   4.  Overview of Approach  . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Path Vector Data Format . . . . . . . . . . . . . . . . .   7
     4.2.  Network Element Property Map  . . . . . . . . . . . . . .   8
     4.3.  Flow Query Format . . . . . . . . . . . . . . . . . . . .   8
     4.4.  Query Specific  . . . . . . . . . . . . . . . . . . . . .   8
   5.  Protocol Extensions . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Cost Type . . . . . . . . . . . . . . . . . . . . . . . .   9
       5.1.1.  Cost Metric . . . . . . . . . . . . . . . . . . . . .   9
       5.1.2.  Cost Mode: Path Vector  . . . . . . . . . . . . . . .   9
     5.2.  Version Tag . . . . . . . . . . . . . . . . . . . . . . .   9
     5.3.  Network Element Name  . . . . . . . . . . . . . . . . . .  10
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