Temporal and hitless path segment monitoring
draft-ietf-mpls-tp-temporal-hitless-psm-06

The information below is for an old version of the document
Document Type Active Internet-Draft (mpls WG)
Last updated 2015-02-27
Replaces draft-koike-mpls-tp-temporal-hitless-psm
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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: August 30, 2015                             Huawei Technologies
                                                                 M. Paul
                                                        Deutsche Telekom
                                                                 S. Ueno
                                                                 K. Arai
                                                                Y. Koike
                                                                     NTT
                                                       February 26, 2015

              Temporal and hitless path segment monitoring
             draft-ietf-mpls-tp-temporal-hitless-psm-06.txt

Abstract

   The MPLS transport profile (MPLS-TP) is being standardized to enable
   carrier-grade packet transport and complement converged packet
   network deployments.  Among the most attractive features of MPLS-TP
   are OAM functions, which enable network operators or service
   providers to provide various maintenance characteristics, such as
   fault location, survivability, performance monitoring, and
   preliminary or in-service measurements.

   One of the most important mechanisms which is common for transport
   network operation is fault location.  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 effective only between end points.  However, the current approach
   defined for MPLS-TP for the segment monitoring (SPME) has some fatal
   drawbacks.  This document elaborates on the problem statement for the
   Sub-path Maintenance Elements (SPMEs) which provides monitoring of a
   portion of a set of transport paths (LSPs or MS-PWs).  Based on the
   problems, this document specifies new requirements to consider a new
   improved mechanism of hitless transport path segment monitoring.

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

D'Alessandro, et al.     Expires August 30, 2015                [Page 1]
Internet-Draft          Temporal and hitless PSM           February 2015

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
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   This Internet-Draft will expire on August 30, 2015.

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   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions used in this document . . . . . . . . . . . . . .   4
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Network objectives for monitoring . . . . . . . . . . . . . .   4
   4.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   5
   5.  OAM functions using segment monitoring  . . . . . . . . . . .   9
   6.  Further consideration of requirements for enhanced
       segmentmonitoring . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Necessity of on-demand single-level monitoring  . . . . .  10
     6.2.  Necessity of on-demand monitoring independent from end-
           to-end proactive monitoring . . . . . . . . . . . . . . .  10
     6.3.   Necessity of arbitrary segment monitoring  . . . . . . .  11
     6.4.  Fault during HPSM in case of protection . . . . . . . . .  13
     6.5.  Consideration of maintenance point for HPSM . . . . . . .  14
   7.  Summary . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
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