Diffserv-Interconnection classes and practice
draft-ietf-tsvwg-diffserv-intercon-11

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Document Type Active Internet-Draft (tsvwg WG)
Last updated 2016-10-11
Replaces draft-geib-tsvwg-diffserv-intercon
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TSVWG                                                       R. Geib, Ed.
Internet-Draft                                          Deutsche Telekom
Intended status: Informational                                  D. Black
Expires: April 14, 2017                                         Dell EMC
                                                        October 11, 2016

             Diffserv-Interconnection classes and practice
                 draft-ietf-tsvwg-diffserv-intercon-11

Abstract

   This document defines a limited common set of Diffserv PHBs and
   codepoints (DSCPs) to be applied at (inter)connections of two
   separately administered and operated networks, and explains how this
   approach can simplify network configuration and operation.  Many
   network providers operate MPLS using Treatment Aggregates for traffic
   marked with different Diffserv Per Hop Behaviors, and use MPLS for
   interconnection with other networks.  This document offers a simple
   interconnection approach that may simplify operation of Diffserv for
   network interconnection among providers that use MPLS and apply the
   Short-Pipe tunnel mode.  While motivated by the requirements of MPLS
   network operators that use Short-Pipe tunnels, this document is
   applicable to other networks, both MPLS and non-MPLS.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 14, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Geib & Black             Expires April 14, 2017                 [Page 1]

Internet-Draft              Diffserv-Intercon               October 2016

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Related work  . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Applicability Statement . . . . . . . . . . . . . . . . .   4
     1.3.  Document Organization . . . . . . . . . . . . . . . . . .   5
   2.  MPLS and the Short Pipe tunnel model  . . . . . . . . . . . .   5
   3.  Relationship to RFC5127 . . . . . . . . . . . . . . . . . . .   6
     3.1.  RFC5127 Background  . . . . . . . . . . . . . . . . . . .   6
     3.2.  Differences from RFC5127  . . . . . . . . . . . . . . . .   7
   4.  The Diffserv-Intercon Interconnection Classes . . . . . . . .   8
     4.1.  Diffserv-Intercon Example . . . . . . . . . . . . . . . .  10
     4.2.  End-to-end PHB and DSCP Transparency  . . . . . . . . . .  12
     4.3.  Treatment of Network Control traffic at carrier
           interconnection interfaces  . . . . . . . . . . . . . . .  13
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  15
   Appendix A.  Appendix A The MPLS Short Pipe Model and IP traffic   16
   Appendix B.  Change log (to be removed by the RFC editor) . . . .  20
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   Diffserv has been deployed in many networks; it provides
   differentiated traffic forwarding based on the Diffserv Codepoint
   (DSCP) field [RFC2474].  This document defines a set of common
   Diffserv classes (Per Hop Behaviors, PHBs) and code points for use at
   interconnection points to which and from which locally used classes
   and code points should be mapped.

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