PMS/Head-end based MPLS Ping and Traceroute in Inter-AS SR Networks
draft-ninan-spring-mpls-inter-as-oam-01

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Routing area                                                    S. Hegde
Internet-Draft                                                  K. Arora
Intended status: Standards Track                                S. Ninan
Expires: January 6, 2020                                   M. Srivastava
                                                   Juniper Networks Inc.
                                                            July 5, 2019

  PMS/Head-end based MPLS Ping and Traceroute in Inter-AS SR Networks
                draft-ninan-spring-mpls-inter-as-oam-01

Abstract

   Segment Routing (SR) architecture leverages source routing and
   tunneling paradigms and can be directly applied to the use of a
   Multiprotocol Label Switching (MPLS) data plane.  Segment Routing
   also provides an easy and efficient way to provide inter connectivity
   in a large scale network as described in [RFC8604].  [RFC8287]
   illustrates the problem and defines extensions to perform LSP Ping
   and Traceroute for Segment Routing IGP-Prefix and IGP-Adjacency
   Segment Identifiers (SIDs) with an MPLS data plane.  It is useful to
   have the LSP Ping and traceroute procedures when an SR end-to-end
   path spans across multiple ASes.  This document describes mechanisms
   to facilitae LSP ping and traceroute in inter-AS SR networks in an
   efficient manner with simple OAM protocol extension which uses
   dataplane forwarding alone for sending Echo-Reply.

Requirements Language

   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].

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Hegde, et al.            Expires January 6, 2020                [Page 1]
Internet-Draft                Inter-as-OAM                     July 2019

   This Internet-Draft will expire on January 6, 2020.

Copyright Notice

   Copyright (c) 2019 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Reverse Path label stack TLV  . . . . . . . . . . . . . . . .   4
     2.1.  Reverse Path label stack TLV definition . . . . . . . . .   4
     2.2.  SRv6 Dataplane  . . . . . . . . . . . . . . . . . . . . .   5
   3.  Detailed Procedures . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Sending an Echo-Request . . . . . . . . . . . . . . . . .   5
     3.2.  Receiving an Echo-Request . . . . . . . . . . . . . . . .   6
     3.3.  Sending an Echo-Reply . . . . . . . . . . . . . . . . . .   6
   4.  Detailed Example  . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Procedures for Segment Routing LSP ping . . . . . . . . .   7
     4.2.  Procedures for Segment Routing LSP Traceroute . . . . . .   7
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   8
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

Hegde, et al.            Expires January 6, 2020                [Page 2]
Internet-Draft                Inter-as-OAM                     July 2019

                       +----------------+
                       | Controller/PMS |
                       +----------------+

    |---------AS1----------|         |--------AS2----------|

                         ASBR2-------ASBR3
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