Multicast On-path Telemetry Solutions
draft-song-multicast-telemetry-06

Document Type Active Internet-Draft (individual)
Authors Haoyu Song  , Mike McBride  , Greg Mirsky 
Last updated 2020-10-20
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IPPM                                                             H. Song
Internet-Draft                                                M. McBride
Intended status: Standards Track                  Futurewei Technologies
Expires: April 23, 2021                                        G. Mirsky
                                                               ZTE Corp.
                                                        October 20, 2020

                 Multicast On-path Telemetry Solutions
                   draft-song-multicast-telemetry-06

Abstract

   This document discusses the requirement of on-path telemetry for
   multicast traffic.  The existing solutions are examined and their
   issues are identified.  Solution modifications are proposed to allow
   the original multicast tree to be correctly reconstructed without
   unnecessary replication of telemetry information.

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.

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
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 23, 2021.

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Copyright Notice

   Copyright (c) 2020 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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements for Multicast Traffic Telemetry  . . . . . . . .   3
   3.  Issues of Existing Techniques . . . . . . . . . . . . . . . .   4
   4.  Proposed Modifications to Existing Techniques . . . . . . . .   4
     4.1.  Per-hop postcard using IOAM DEX . . . . . . . . . . . . .   5
     4.2.  Per-section postcard  . . . . . . . . . . . . . . . . . .   7
   5.  Considerations for Different Multicast Protocols  . . . . . .   8
     5.1.  Application in PIM  . . . . . . . . . . . . . . . . . . .   8
     5.2.  Application in P2MP . . . . . . . . . . . . . . . . . . .   9
     5.3.  Application in BIER . . . . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  10
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     10.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Multicast traffic is an important traffic type in today's Internet.
   Multicast provides services that are often real time (e.g., online
   meeting) or have strict QoS requirements (e.g., IPTV, Market Data).
   Multicast packet drop and delay can severely affect the application
   performance and user experience.

   It is important to monitor the performance of the multicast traffic.
   Existing OAM techniques cannot gain direct and accurate information
   about the multicast traffic.  New on-path telemetry techniques such
   as In-situ OAM [I-D.ietf-ippm-ioam-data], Postcard-based Telemetry

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   [I-D.song-ippm-postcard-based-telemetry], and Hybrid Two-Step (HTS)
   [I-D.mirsky-ippm-hybrid-two-step] provide promising means to directly
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