Synonymous Flow Label Framework
draft-ietf-mpls-sfl-framework-06

Document Type Active Internet-Draft (mpls WG)
Last updated 2019-10-09
Replaces draft-bryant-mpls-sfl-framework
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MPLS Working Group                                             S. Bryant
Internet-Draft                                Fururewei Technologies Inc
Intended status: Informational                                   M. Chen
Expires: April 11, 2020                                            Z. Li
                                                                  Huawei
                                                              G. Swallow
                                               Southend Technical Center
                                                            S. Sivabalan
                                                           Cisco Systems
                                                               G. Mirsky
                                                               ZTE Corp.
                                                        October 09, 2019

                    Synonymous Flow Label Framework
                    draft-ietf-mpls-sfl-framework-06

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 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 April 11, 2020.

Bryant, et al.           Expires April 11, 2020                 [Page 1]
Internet-Draft                   MPLS FL                    October 2019

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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   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 . . . . . . . . . . . . . . . . . . . .   3
   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 3) 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.

Bryant, et al.           Expires April 11, 2020                 [Page 2]
Internet-Draft                   MPLS FL                    October 2019

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
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