Operations, Administration and Maintenance (OAM) Requirements for Bit Index Explicit Replication (BIER) Layer
draft-ietf-bier-oam-requirements-12

BIER Working Group                                        G. Mirsky, Ed.
Internet-Draft                                                  Ericsson
Intended status: Informational                                  N. Kumar
Expires: 1 October 2023                              Cisco Systems, Inc.
                                                                 M. Chen
                                                     Huawei Technologies
                                                      S. Pallagatti, Ed.
                                                                  VMware
                                                           30 March 2023

 Operations, Administration and Maintenance (OAM) Requirements for Bit
                Index Explicit Replication (BIER) Layer
                  draft-ietf-bier-oam-requirements-12

Abstract

   This document describes a list of functional requirements toward
   Operations, Administration and Maintenance (OAM) toolset in Bit Index
   Explicit Replication (BIER) layer of a network.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on 1 October 2023.

Copyright Notice

   Copyright (c) 2023 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   Please review these documents carefully, as they describe your rights
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   extracted from this document must include Revised BSD License text as
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   provided without warranty as described in the Revised BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions used in this document . . . . . . . . . . . .   2
       1.1.1.  Terminology . . . . . . . . . . . . . . . . . . . . .   2
       1.1.2.  Requirements Language . . . . . . . . . . . . . . . .   3
   2.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     5.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Contributors' Addresses . . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   [RFC8279] introduces and explains Bit Index Explicit Replication
   (BIER) architecture and how it supports forwarding of multicast data
   packets.

   This document lists the OAM requirements for the BIER layer of the
   multicast domain.  The list can further be used for gap analysis of
   available OAM tools to identify possible enhancements of existing or
   whether new OAM tools are required to support proactive and on-demand
   path monitoring and service validation.

1.1.  Conventions used in this document

1.1.1.  Terminology

   The term "BIER OAM" used in this document interchangeably with longer
   version "set of OAM protocols, methods, and tools for BIER layer".

   BFR: Bit-Forwarding Router

   BFER: Bit-Forwarding Egress Router

   BIER: Bit Index Explicit Replication

   OAM: Operations, Administration and Maintenance

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1.1.2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

2.  Requirements

   This section lists the requirements for OAM of the BIER layer:

   1.   The listed requirements MUST be supported with any transport
        layer over which the BIER layer can be realized.

   2.   It MUST be possible to initialize a BIER OAM session from any
        Bit-Forwarding Router (BFR) of the given BIER domain.

   3.   It SHOULD be possible to initialize a BIER OAM session from a
        centralized controller.

   4.   BIER OAM MUST support proactive and on-demand OAM monitoring and
        measurement methods.

   5.   BIER OAM MUST support unidirectional OAM methods, both
        continuity check and performance measurement.

   6.   BIER OAM packets MUST be in-band, i.e., follow exactly the same
        path as data plane traffic, in the forward direction, i.e., from
        ingress toward egress endpoint(s) of the OAM test session.

   7.   BIER OAM MUST support bi-directional OAM methods.  Such OAM
        methods MAY combine in-band monitoring or measurement in the
        forward direction and out-of-band notification in the reverse
        direction, i.e., from egress to ingress end point of the OAM
        test session.

   8.   BIER OAM MUST support proactive monitoring of BFER availability
        by a BFR in the given BIER domain, e.g., p2mp BFD active tail
        support.

   9.   BIER OAM MUST support Path Maximum Transmission Unit discovery.

   10.  BIER OAM MUST support Reverse Defect Indication (RDI)
        notification of the source of continuity checking BFR by Bit-
        Forwarding Egress Routers (BFERs), e.g., by using Diag in p2mp
        BFD with active tail support.

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   11.  BIER OAM MUST support active and passive performance measurement
        methods.

   12.  BIER OAM MUST support unidirectional performance measurement
        methods to calculate throughput, loss, delay, and delay
        variation metrics.  [RFC6374] provides great details for
        performance measurement and performance metrics.

   13.  BIER OAM MUST support defect notification mechanism, like Alarm
        Indication Signal.  Any BFR in the given BIER domain MAY
        originate a defect notification addressed to any subset of BFRs
        within the domain.

   14.  BIER OAM MUST support methods to enable the survivability of a
        BIER layer.  These recovery methods MAY use protection switching
        and restoration.

3.  IANA Considerations

   This document does not propose any IANA consideration.  This section
   may be removed.

4.  Security Considerations

   This document lists the OAM requirement for a BIER-enabled domain and
   does not raise any security concerns or issues in addition to ones
   common to networking.

5.  References

5.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

5.2.  Informative References

   [RFC6374]  Frost, D. and S. Bryant, "Packet Loss and Delay
              Measurement for MPLS Networks", RFC 6374,
              DOI 10.17487/RFC6374, September 2011,
              <https://www.rfc-editor.org/info/rfc6374>.

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   [RFC8279]  Wijnands, IJ., Ed., Rosen, E., Ed., Dolganow, A.,
              Przygienda, T., and S. Aldrin, "Multicast Using Bit Index
              Explicit Replication (BIER)", RFC 8279,
              DOI 10.17487/RFC8279, November 2017,
              <https://www.rfc-editor.org/info/rfc8279>.

Contributors' Addresses

   Erik Nordmark
   Email: nordmark@acm.org

   Sam Aldrin
   Google
   Email: aldrin.ietf@gmail.com

   Lianshu Zheng
   Email: veronique_cheng@hotmail.com

   Nobo Akiya
   Email: nobo.akiya.dev@gmail.com

Authors' Addresses

   Greg Mirsky (editor)
   Ericsson
   Email: gregimirsky@gmail.com

   Nagendra Kumar
   Cisco Systems, Inc.
   Email: naikumar@cisco.com

   Mach Chen
   Huawei Technologies
   Email: mach.chen@huawei.com

   Santosh Pallagatti (editor)
   VMware
   Email: santosh.pallagatti@gmail.com

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