Multi-Cost ALTO
draft-ietf-alto-multi-cost-10

Document Type Active Internet-Draft (alto WG)
Last updated 2017-05-23 (latest revision 2017-04-27)
Replaces draft-randriamasy-alto-multi-cost
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Send notices to "Jan Seedorf" <ietf@j-f-s.de>
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Network Working Group                                     S. Randriamasy
Internet-Draft                                                  W. Roome
Intended status: Standards Track                         Nokia Bell Labs
Expires: October 29, 2017                                      N. Schwan
                                                      Thales Deutschland
                                                          April 27, 2017

                            Multi-Cost ALTO
                     draft-ietf-alto-multi-cost-10

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.

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 October 29, 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

Randriamasy, et al.     Expires October 29, 2017                [Page 1]
Internet-Draft               Multi-Cost ALTO                  April 2017

   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
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   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
     5.3.  Multi-Cost Filtered Cost Map: Example #2  . . . . . . . .  20
     5.4.  Multi-Cost Filtered Cost Map: Example #3  . . . . . . . .  22
     5.5.  Multi-Cost Filtered Cost Map: Example #4  . . . . . . . .  23
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