Multi-Cost ALTO
draft-ietf-alto-multi-cost-09

Document Type Active Internet-Draft (alto WG)
Last updated 2017-04-25
Replaces draft-randriamasy-alto-multi-cost
Stream IETF
Intended RFC status Proposed Standard
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Network Working Group                                     S. Randriamasy
Internet-Draft                                                  W. Roome
Intended status: Standards Track                         Nokia Bell Labs
Expires: October 27, 2017                                      N. Schwan
                                                      Thales Deutschland
                                                          April 25, 2017

                            Multi-Cost ALTO
                     draft-ietf-alto-multi-cost-09

Abstract

   The ALTO (Application Layer-Traffic Optimization) Protocol
   ([RFC7285]) defines several services that return various metrics
   describing the costs between network endpoints.

   This document defines a new service that allows an ALTO Client to
   retrieve several cost metrics in a single request for an ALTO
   Filtered Cost Map and Endpoint Cost Map.  In addition, it extends the
   constraints to further filter those maps by allowing a client to
   specify a logical combination of tests on several cost metrics.

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
   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 October 27, 2017.

Randriamasy, et al.     Expires October 27, 2017                [Page 1]
Internet-Draft               Multi-Cost ALTO                  April 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
   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Overview Of Approach  . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Multi-Cost Data Format  . . . . . . . . . . . . . . . . .   5
     3.2.  Compatibility With Legacy ALTO Clients  . . . . . . . . .   5
     3.3.  Filtered Multi Cost Map Resources . . . . . . . . . . . .   6
     3.4.  Endpoint Cost Service Resources . . . . . . . . . . . . .   6
     3.5.  Full Cost Map Resources . . . . . . . . . . . . . . . . .   7
     3.6.  Extended Constraint Tests . . . . . . . . . . . . . . . .   7
       3.6.1.  Extended constraint predicates  . . . . . . . . . . .   7
       3.6.2.  Extended logical combination of predicates  . . . . .   7
       3.6.3.  Testable Cost Types in constraints  . . . . . . . . .   8
       3.6.4.  Testable Cost Type Names in IRD capabilities  . . . .   9
       3.6.5.  Legacy ALTO Client issues . . . . . . . . . . . . . .   9
   4.  Protocol Extensions for Multi-Cost ALTO Transactions  . . . .  11
     4.1.  Filtered Cost Map Extensions  . . . . . . . . . . . . . .  11
       4.1.1.  Capabilities  . . . . . . . . . . . . . . . . . . . .  11
       4.1.2.  Accept Input Parameters . . . . . . . . . . . . . . .  12
       4.1.3.  Response  . . . . . . . . . . . . . . . . . . . . . .  15
     4.2.  Endpoint Cost Service Extensions  . . . . . . . . . . . .  15
       4.2.1.  Capabilities  . . . . . . . . . . . . . . . . . . . .  16
       4.2.2.  Accept Input Parameters . . . . . . . . . . . . . . .  16
       4.2.3.  Response  . . . . . . . . . . . . . . . . . . . . . .  17
   5.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .  17
     5.1.  Information Resource Directory  . . . . . . . . . . . . .  17
     5.2.  Multi-Cost Filtered Cost Map: Example #1  . . . . . . . .  19
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