A Vocabulary of Path Properties
draft-enghardt-panrg-path-properties-03

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PANRG                                                        T. Enghardt
Internet-Draft                                                 TU Berlin
Intended status: Informational                           C. Kraehenbuehl
Expires: May 7, 2020                                         ETH Zuerich
                                                       November 04, 2019

                    A Vocabulary of Path Properties
                draft-enghardt-panrg-path-properties-03

Abstract

   Path properties express information about paths across a network and
   the services provided via such paths.  In a path-aware network, path
   properties may be fully or partially available to entities such as
   hosts.  This document defines and categorizes path properties.
   Furthermore, the document specifies several path properties which
   might be useful to hosts or other entities.

Status of This Memo

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   This Internet-Draft will expire on May 7, 2020.

Copyright Notice

   Copyright (c) 2019 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
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Use Cases for Path Properties . . . . . . . . . . . . . . . .   4
     3.1.  Performance Monitoring and Enhancement  . . . . . . . . .   4
     3.2.  Path Selection  . . . . . . . . . . . . . . . . . . . . .   4
     3.3.  Traffic Configuration . . . . . . . . . . . . . . . . . .   5
   4.  Examples of Path Properties . . . . . . . . . . . . . . . . .   6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   7.  Informative References  . . . . . . . . . . . . . . . . . . .   8
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   In the current Internet architecture, hosts generally do not have
   information about forwarding paths through the network and about
   services associated with these paths.  A path-aware network, as
   introduced in [I-D.irtf-panrg-questions], exposes information about
   paths to hosts or to other entities.  This document defines such
   information as path properties, addressing the first of the questions
   in path-aware networking [I-D.irtf-panrg-questions].

   As terms related to paths have different meanings in different areas
   of networking, first, this document provides a common terminology to
   define paths, path elements, and path properties.  Then, this
   document provides some examples for use cases for path properties.
   Finally, the document lists several path properties that may be
   useful for the mentioned use cases.

2.  Terminology

   Node:  An entity which processes packets, e.g., sends, receives,
      forwards, or modifies them.  A node may be physical or virtual,
      e.g., a machine or a service function.  A node may also be the
      collection of multiple entities which, as a collection, processes
      packets, e.g., an entire Autonomous System (AS).

   Host:  A node that generally executes application programs on behalf
      of user(s), employing network and/or Internet communication
      services in support of this function, as defined in [RFC1122].

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   Link:  A medium or communication facility that connects two or more