Bit Index Explicit Replication (BIER) Encapsulation for In-situ OAM (IOAM) Data
draft-xzlnp-bier-ioam-00

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BIER Working Group                                                X. Min
Internet-Draft                                                  Z. Zhang
Intended status: Standards Track                               ZTE Corp.
Expires: January 14, 2021                                         Y. Liu
                                                            China Mobile
                                                               N. Nainar
                                                            C. Pignataro
                                                     Cisco Systems, Inc.
                                                           July 13, 2020

  Bit Index Explicit Replication (BIER) Encapsulation for In-situ OAM
                              (IOAM) Data
                        draft-xzlnp-bier-ioam-00

Abstract

   In-situ Operations, Administration, and Maintenance (IOAM) collects
   operational and telemetry information while the packet traverses a
   particular network domain.  Bit Index Explicit Replication (BIER) is
   an architecture that provides optimal multicast forwarding through a
   "multicast domain", without requiring intermediate routers to
   maintain any per-flow state or to engage in an explicit tree-building
   protocol.  The BIER header contains a bit-string in which each bit
   represents exactly one egress router to forward the packet to.  This
   document outlines the requirements to carry IOAM data in BIER header
   and specifies how IOAM data fields are encapsulated in BIER header.

Status of This Memo

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   This Internet-Draft will expire on January 14, 2021.

Min, et al.             Expires January 14, 2021                [Page 1]
Internet-Draft          BIER Encap for IOAM Data               July 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   3
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     2.2.  Abbreviations . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Requirements to carry IOAM data in BIER header  . . . . . . .   3
   4.  IOAM data fields encapsulation in BIER header . . . . . . . .   4
   5.  Considerations  . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Discussion of the encapsulation approach  . . . . . . . .   6
     5.2.  IOAM and the use of the BIER OAM bits . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   In-situ Operations, Administration, and Maintenance (IOAM) collects
   operational and telemetry information while the packet traverses a
   particular network domain.  [I-D.ietf-ippm-ioam-data] defines
   different IOAM data fields used to record various telemetry data from
   the transit nodes.  The term "in-situ" refers to the fact that the
   IOAM data fields are added to the data packets rather than being sent
   within packets specifically dedicated to OAM.

   Bit Index Explicit Replication (BIER), as defined in [RFC8279], is an
   architecture that provides optimal multicast forwarding through a
   "multicast domain", without requiring intermediate routers to