Enhanced path segment monitoring
draft-ietf-mpls-tp-temporal-hitless-psm-08

The information below is for an old version of the document
Document Type Active Internet-Draft (mpls WG)
Last updated 2015-12-02
Replaces draft-koike-mpls-tp-temporal-hitless-psm
Stream IETF
Intended RFC status Informational
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Stream WG state Waiting for WG Chair Go-Ahead
Document shepherd Ross Callon
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Network Working Group                                    A. D'Alessandro
Internet-Draft                                            Telecom Italia
Intended status: Standards Track                            L. Andersson
Expires: June 4, 2016                                Huawei Technologies
                                                                 M. Paul
                                                        Deutsche Telekom
                                                                 S. Ueno
                                                      NTT Communications
                                                                 K. Arai
                                                                Y. Koike
                                                                     NTT
                                                        December 2, 2015

                    Enhanced path segment monitoring
             draft-ietf-mpls-tp-temporal-hitless-psm-08.txt

Abstract

   The MPLS transport profile (MPLS-TP) has been standardized to enable
   carrier-grade packet transport and to complement converged packet
   network deployments.  The most attractive features of MPLS-TP are the
   OAM functions.  These functions enable maintenance tools that may be
   exploited by network operators and service providers for fault
   location, survivability, performance monitoring, in-service and out-
   of-service measurements.

   One of the most important mechanisms that is common for transport
   network operation is fault localisation.  A segment monitoring
   function of a transport path is effective in terms of extension of
   the maintenance work and indispensable, particularly when the OAM
   function is activated only between end points.  However, the current
   approach defined for MPLS-TP of segment monitoring has some
   drawbacks.  This document elaborates on the problem statement for the
   Sub-path Maintenance Elements (SPMEs) which provide monitoring of a
   segment of a set of transport paths (LSPs or MS-PWs).  Based on the
   identified problems, this document provides considerations for the
   specification of new requirements to consider a new improved
   mechanism for hitless transport path segment monitoring to be named
   Enhanced Path Segment Monitoring (EPSM).

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

D'Alessandro, et al.      Expires June 4, 2016                  [Page 1]
Internet-Draft      Enhanced path segment monitoring       December 2015

   working documents as Internet-Drafts.  The list of current Internet-
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   This Internet-Draft will expire on June 4, 2016.

Copyright Notice

   Copyright (c) 2015 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Network objectives for segment monitoring . . . . . . . . . .   4
   4.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   5
   5.  OAM functions supported in segment monitoring . . . . . . . .   8
   6.  Requirements for enhanced segment monitoring  . . . . . . . .   9
     6.1.  Non-intrusive segment monitoring  . . . . . . . . . . . .   9
     6.2.  Single and multiple level monitoring  . . . . . . . . . .   9
     6.3.  EPSM and end-to-end proactive monitoring independence . .  10
     6.4.  Arbitrary segment monitoring  . . . . . . . . . . . . . .  11
     6.5.  Fault while EPSM is operational . . . . . . . . . . . . .  12
     6.6.  EPSM maintenance points . . . . . . . . . . . . . . . . .  13
   7.  Summary . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
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