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Operations and Management (OAM) Requirements for Multi-Protocol Label Switched (MPLS) Networks
RFC 4377

Network Working Group                                          T. Nadeau
Request for Comments: 4377                                     M. Morrow
Category: Informational                                       G. Swallow
                                                     Cisco Systems, Inc.
                                                                D. Allan
                                                         Nortel Networks
                                                           S. Matsushima
                                                           Japan Telecom
                                                           February 2006

             Operations and Management (OAM) Requirements
           for Multi-Protocol Label Switched (MPLS) Networks

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This document specifies Operations and Management (OAM) requirements
   for Multi-Protocol Label Switching (MPLS), as well as for
   applications of MPLS, such as pseudo-wire voice and virtual private
   network services.  These requirements have been gathered from network
   operators who have extensive experience deploying MPLS networks.

Table of Contents

   1. Introduction ....................................................2
   2. Document Conventions ............................................2
   3. Motivations .....................................................4
   4. Requirements ....................................................4
   5. Security Considerations ........................................11
   6. References .....................................................12
   7. Acknowledgements ...............................................13

Nadeau, et al.               Informational                      [Page 1]
RFC 4377           OAM Requirements for MPLS Networks      February 2006

1.  Introduction

   This document describes requirements for user and data plane
   Operations and Management (OAM) for Multi-Protocol Label Switching
   (MPLS).  These requirements have been gathered from network operators
   who have extensive experience deploying MPLS networks.  This document
   specifies OAM requirements for MPLS, as well as for applications of
   MPLS.

   Currently, there are no specific mechanisms proposed to address these
   requirements.  The goal of this document is to identify a commonly
   applicable set of requirements for MPLS OAM at this time.
   Specifically, a set of requirements that apply to the most common set
   of MPLS networks deployed by service provider organizations at the
   time this document was written.  These requirements can then be used
   as a base for network management tool development and to guide the
   evolution of currently specified tools, as well as the specification
   of OAM functions that are intrinsic to protocols used in MPLS
   networks.

2.  Document Conventions

2.1.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

   Queuing/buffering Latency: The delay caused by packet queuing (value
                              is variable since it is dependent on the
                              packet arrival rate, the packet length,
                              and the link throughput).

   Probe-based-detection:     Active measurement tool that can measure
                              the consistency of an LSP [RFC4379].

   Defect:                    Any error condition that prevents a Label
                              Switched Path (LSP) from functioning
                              correctly.  For example, loss of an
                              Interior Gateway Protocol (IGP) path will
                              most likely result in an LSP not being
                              able to deliver traffic to its
                              destination.  Another example is the
                              interruption of the path for a TE tunnel.
                              These may be due to physical circuit
                              failures or failure of switching nodes to
                              operate as expected.

Nadeau, et al.               Informational                      [Page 2]
RFC 4377           OAM Requirements for MPLS Networks      February 2006

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