A scalable and topology aware MPLS data plane monitoring system
draft-ietf-spring-oam-usecase-02

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Document Type Active Internet-Draft (spring WG)
Last updated 2016-04-15
Replaces draft-geib-segment-routing-oam-usecase, draft-geib-spring-oam-usecase
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spring                                                      R. Geib, Ed.
Internet-Draft                                          Deutsche Telekom
Intended status: Informational                               C. Filsfils
Expires: October 17, 2016                                   C. Pignataro
                                                                N. Kumar
                                                     Cisco Systems, Inc.
                                                          April 15, 2016

    A scalable and topology aware MPLS data plane monitoring system
                    draft-ietf-spring-oam-usecase-02

Abstract

   This document describes features of a path monitoring system and a
   use case.  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 to
   legacy MPLS ping and path trace, it doesn't result in a deprication
   them.  MPLS topology awareness reduces management and control plane
   involvement of OAM measurements while enabling new OAM features.

Status of This Memo

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   This Internet-Draft will expire on October 17, 2016.

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Geib, et al.            Expires October 17, 2016                [Page 1]

Internet-Draft          SR MPLS monitoring system             April 2016

   carefully, as they describe your rights and restrictions with respect
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  An MPLS topology aware path monitoring system . . . . . . . .   4
   3.  SR based path monitoring use case illustration  . . . . . . .   5
     3.1.  Use-case 1 - LSP dataplane monitoring . . . . . . . . . .   5
     3.2.  Use-case 2 - Monitoring a remote bundle . . . . . . . . .   7
     3.3.  Use-Case 3 - Fault localization . . . . . . . . . . . . .   8
   4.  Failure Notification from PMS to LERi . . . . . . . . . . . .   8
   5.  Applying SR to monitor LDP paths  . . . . . . . . . . . . . .   9
   6.  PMS monitoring of different Segment ID types  . . . . . . . .   9
   7.  Connectivity Verification using PMS . . . . . . . . . . . . .   9
   8.  Extensions of related standards helpful for this use case . .  10
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  10
   11. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  10
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     12.2.  Informative References . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   It is essential for a network operator to monitor all the forwarding
   paths observed by the transported user packets.  The monitoring flow
   is expected to be forwarded in dataplane in a similar way as user
   packets.  Segment Routing enables forwarding of packets along pre-
   defined paths and segments and thus a Segment Routed monitoring
   packet can stay in dataplane while passing along one or more segments
   to be monitored.

   This document describes illustrates a system using MPLS data plane
   path monitoring capabilities.  The use case introduced here is
   limited to a single IGP MPLS domain.

   The system applies to monitoring of LDP LSP's as well as to
   monitoring of Segment Routed LSP's.  As compared to LDP, Segment
   Routing is expected to simplify the system by enabling MPLS topology
   detection based on IGP signaled segments as specified by
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