Synonymous Flow Label Framework
draft-ietf-mpls-sfl-framework-03

Document Type Active Internet-Draft (mpls WG)
Last updated 2018-06-18
Replaces draft-bryant-mpls-sfl-framework
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MPLS Working Group                                             S. Bryant
Internet-Draft                                                   M. Chen
Intended status: Informational                                     Z. Li
Expires: December 20, 2018                                        Huawei
                                                              G. Swallow
                                               Southend Technical Center
                                                            S. Sivabalan
                                                           Cisco Systems
                                                               G. Mirsky
                                                               ZTE Corp.
                                                           June 18, 2018

                    Synonymous Flow Label Framework
                    draft-ietf-mpls-sfl-framework-03

Abstract

   RFC 8372 describes the requirement for introducing flow identities
   within the MPLS architecture.  This document describes a method of
   accomplishing this by using a technique called Synonymous Flow Labels
   in which labels which mimic the behaviour of other labels provide the
   identification service.  These identifiers can be used to trigger
   per-flow operations on the on the packet at the receiving label
   switching router.

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 December 20, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Bryant, et al.          Expires December 20, 2018               [Page 1]
Internet-Draft                   MPLS FL                       June 2018

   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
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   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Synonymous Flow Labels  . . . . . . . . . . . . . . . . . . .   3
   4.  User Service Traffic in the Data Plane  . . . . . . . . . . .   4
     4.1.  Applications Label Present  . . . . . . . . . . . . . . .   4
       4.1.1.  Setting TTL and the Traffic Class Bits  . . . . . . .   5
     4.2.  Single Label Stack  . . . . . . . . . . . . . . . . . . .   5
       4.2.1.  Setting TTL and the Traffic Class Bits  . . . . . . .   6
     4.3.  Aggregation of SFL Actions  . . . . . . . . . . . . . . .   6
   5.  Equal Cost Multipath Considerations . . . . . . . . . . . . .   7
   6.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   [RFC8372] describes the requirement for introducing flow identities
   within the MPLS architecture.

   This document describes a method of accomplishing this by using a
   technique called Synonymous Flow Labels (SFL) (see (Section 2)) in
   which labels which mimic the behaviour of other labels provide the
   identification service.  These identifiers can be used to trigger
   per-flow operations on the packet at the receiving label switching
   router.

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP

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