Label Switched Path (LSP) Ping/Traceroute for Segment Routing (SR) Egress Peer Engineering Segment Identifiers (SIDs) with MPLS Data Planes
draft-ietf-mpls-sr-epe-oam-00

Document Type Active Internet-Draft (mpls WG)
Last updated 2020-06-16
Replaces draft-hegde-mpls-spring-epe-oam
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Routing area                                                    S. Hegde
Internet-Draft                                                  K. Arora
Intended status: Standards Track                           M. Srivastava
Expires: December 18, 2020                         Juniper Networks Inc.
                                                                S. Ninan
                                                  Individual Contributor
                                                                   X. Xu
                                                            Alibaba Inc.
                                                           June 16, 2020

   Label Switched Path (LSP) Ping/Traceroute for Segment Routing (SR)
Egress Peer Engineering Segment Identifiers (SIDs) with MPLS Data Planes
                     draft-ietf-mpls-sr-epe-oam-00

Abstract

   Egress Peer Engineering (EPE) is an application of Segment Routing to
   Solve the problem of egress peer selection.  The Segment Routing
   based BGP-EPE solution allows a centralized controller, e.g. a
   Software Defined Network (SDN) controller to program any egress peer.
   The EPE solution requires a node to program the PeerNode Segment
   Identifier(SID) describing a session between two nodes, the PeerAdj
   SID describing the link (one or more) that is used by sessions
   between peer nodes, and the PeerSet SID describing an arbitrary set
   of sessions or links between a local node and its peers.  This
   document provides new sub-TLVs for EPE Segment Identifiers (SID) that
   would be used in the MPLS Target stack TLV (Type 1), in MPLS Ping and
   Traceroute procedures.

Status of This Memo

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   This Internet-Draft will expire on December 18, 2020.

Hegde, et al.           Expires December 18, 2020               [Page 1]
Internet-Draft                   EPE-OAM                       June 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Theory of Operation . . . . . . . . . . . . . . . . . . . . .   3
   3.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   4.  FEC Definitions . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  PeerAdj SID Sub-TLV . . . . . . . . . . . . . . . . . . .   4
     4.2.  PeerNode SID Sub-TLV  . . . . . . . . . . . . . . . . . .   6
     4.3.  PeerSet SID Sub-TLV . . . . . . . . . . . . . . . . . . .   9
   5.  EPE-SID FEC validation  . . . . . . . . . . . . . . . . . . .  11
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  15
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   Egress Peer Engineering (EPE) as defined in
   [I-D.ietf-spring-segment-routing-central-epe] is an effective
   mechanism to select the egress peer link based on different criteria.
   The EPE-SIDs provide means to represent egress peer links.  Many
   network deployments have built their networks consisting of multiple
   Autonomous Systems either for ease of operations or as a result of
   network mergers and acquisitons.  The inter-AS links connecting the
   two Autonomous Systems could be traffic engineered using EPE-SIDs in
   this case as well.It is important to be able to validate the control
   plane to forwarding plane synchronization for these SIDs so that any
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