A Simple Control Protocol for MPLS SFLs
draft-bryant-mpls-sfl-control-08

Document Type Active Internet-Draft (mpls WG)
Authors Stewart Bryant  , George Swallow  , Siva Sivabalan 
Last updated 2020-06-08
Stream IETF
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Document shepherd Loa Andersson
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Send notices to Loa Andersson <loa@pi.nu>, <draft-bryant-mpls-sfl-control@ietf.org>
MPLS Working Group                                             S. Bryant
Internet-Draft                               Futurewei Technologies Inc.
Intended status: Standards Track                              G. Swallow
Expires: December 10, 2020                     Southend Technical Center
                                                            S. Sivabalan
                                                       Ciena Corporation
                                                           June 08, 2020

                A Simple Control Protocol for MPLS SFLs
                    draft-bryant-mpls-sfl-control-08

Abstract

   In draft-ietf-mpls-sfl-framework the concept of MPLS synonymous flow
   labels (SFL) was introduced.  This document describes a simple
   control protocol that runs over an associated control header to
   request, withdraw, and extend the lifetime of such labels.  It is not
   the only control protocol that moght be used to support SFL, but it
   has the benefit of being able to be used without modifying of the
   existing MPLS control prodocols.  The existance of this design is not
   intended to restrict the ability to enhance an existing MPLS control
   protocol to add a similar capability.

   A Querier MUST wait a configured time (suggested wait of 60 seconds)
   before re-attempting a Withdraw request.  No more than three Withdraw
   requests SHOULD be made.  These restricctions are to prevent
   overloading the control plane of the actioning 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
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on December 10, 2020.

Bryant, et al.          Expires December 10, 2020               [Page 1]
Internet-Draft              MPLS SFL Control                   June 2020

Copyright Notice

   Copyright (c) 2020 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  SFL Control . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  SFL Control Message . . . . . . . . . . . . . . . . . . .   3
     3.2.  SFL Control Procedures  . . . . . . . . . . . . . . . . .   7
       3.2.1.  Request/Grant . . . . . . . . . . . . . . . . . . . .   7
       3.2.2.  Refresh . . . . . . . . . . . . . . . . . . . . . . .   9
       3.2.3.  Withdraw  . . . . . . . . . . . . . . . . . . . . . .  10
       3.2.4.  Timer Accuracy  . . . . . . . . . . . . . . . . . . .  10
   4.  Return Path . . . . . . . . . . . . . . . . . . . . . . . . .  11
   5.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  11
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Allocation of MPLS Generalized Associated Channel (G-ACh)
           Type  . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.2.  Creation of SFL Simple Control Code Registry  . . . . . .  12
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  12
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   In [I-D.ietf-mpls-sfl-framework] the concept of MPLS synonymous flow
   labels (SFL) was introduced.  This document describes a simple
   control protocol, for use in a well-managed MPLS network, that runs
   over an associated control header to request, withdraw, and extend
   the lifetime of such labels.  It is not the only control protocol
   that moght be used to support SFL, but it has the benefit of being
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