A Scalable and Topology-Aware MPLS Dataplane Monitoring System
draft-ietf-spring-oam-usecase-04

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Document Type Active Internet-Draft (spring WG)
Last updated 2017-01-27 (latest revision 2016-10-20)
Replaces draft-geib-spring-oam-usecase, draft-geib-segment-routing-oam-usecase
Stream IETF
Intended RFC status Informational
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spring                                                      R. Geib, Ed.
Internet-Draft                                          Deutsche Telekom
Intended status: Informational                               C. Filsfils
Expires: April 23, 2017                                C. Pignataro, Ed.
                                                                N. Kumar
                                                                   Cisco
                                                        October 20, 2016

     A Scalable and Topology-Aware MPLS Dataplane Monitoring System
                    draft-ietf-spring-oam-usecase-04

Abstract

   This document describes features of a path monitoring system and
   related use cases.  Segment based routing enables a scalable and
   simple method to monitor data plane liveliness of the complete set of
   paths belonging to a single domain.  The MPLS monitoring system adds
   features to the traditional MPLS ping and LSP trace, in a very
   complementary way.  MPLS topology awareness reduces management and
   control plane involvement of OAM measurements while enabling new OAM
   features.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on April 23, 2017.

Copyright Notice

   Copyright (c) 2016 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
   (http://trustee.ietf.org/license-info) in effect on the date of

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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  An MPLS Topology-Aware Path Monitoring System . . . . . . . .   4
   4.  SR-based Path Monitoring Use Case Illustration  . . . . . . .   6
     4.1.  Use Case 1 - LSP Dataplane Monitoring . . . . . . . . . .   6
     4.2.  Use Case 2 - Monitoring a Remote Bundle . . . . . . . . .   8
     4.3.  Use Case 3 - Fault Localization . . . . . . . . . . . . .   9
   5.  Failure Notification from PMS to LERi . . . . . . . . . . . .   9
   6.  Applying SR to Monitoring non-SR based LSPs (LDP and possibly
       RSVP-TE)  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
   7.  PMS Monitoring of Different Segment ID Types  . . . . . . . .  10
   8.  Connectivity Verification Using PMS . . . . . . . . . . . . .  10
   9.  Extensions of Specifications Relevant to this Use Case  . . .  10
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  10
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     13.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Acronyms

   ECMP  Equal-Cost Multi-Path
   IGP   Interionr Gateway Protocol
   LER   Label Edge Router
   LSP   Label Switched Path
   LSR   Label Switching Router
   OAM   Operations, Administration, and Maintenance
   PMS   Path Monitoring System
   SID   Segment Identifier
   SR    Segment Routing
   SRGB  Segment Routing Global Block

2.  Introduction

   It is essential for a network operator to monitor all the forwarding
   paths observed by the transported user packets.  The monitoring
   packet is expected to be forwarded in dataplane in a similar way as

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   user packets.  Segment Routing enables forwarding of packets along
   pre-defined paths and segments and thus a Segment Routed monitoring
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