PIM Assert Message Packing
draft-liu-pim-assert-packing-01

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Last updated 2019-06-19
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PIM Working Group                                            Yisong Liu
Internet Draft                                      Huawei Technologies
Intended status: Standards Track                             M. McBride
Expires: December 20, 2019                                    T. Eckert
                                                              Futurewei
                                                          June 20, 2019

                        PIM Assert Message Packing
                      draft-liu-pim-assert-packing-01

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Liu, et al.            Expires December, 2019                 [Page 1]
Internet-Draft            PIM Assert Packing                 June 2019

Abstract

   In PIM-SM shared LAN networks, there is typically more than one
   upstream router. When duplicate data packets appear on the LAN from
   different routers, assert packets are sent from these routers to
   elect a single forwarder. The PIM assert packets are sent
   periodically to keep the assert state. The PIM assert packet carries
   information about a single multicast source and group, along with the
   metric-preference and metric of the route towards the source or RP.
   This document defines a standard to send and receive multiple
   multicast source and group information in a single PIM assert packet
   in a shared network. This can be particularly helpful when there is
   traffic for a large number of multicast groups.

Table of Contents

   1. Introduction ................................................ 2
      1.1. Requirements Language .................................. 3
      1.2. Terminology ............................................ 3
   2. Use Cases ................................................... 3
      2.1. Enterprise network ..................................... 3
      2.2. Video surveillance ..................................... 4
      2.3. Financial Services ..................................... 4
      2.4. IPTV broadcast video ................................... 4
      2.5. Summary ................................................ 4
   3. Solution .................................................... 5
      3.1. PIM Assert Packing Hello Option ........................ 5
      3.2. PIM Assert Packing Simple Type ......................... 5
      3.3. PIM Assert Packing Aggregation Type .................... 5
   4. Packet Format ............................................... 6
      4.1. PIM Assert Packing Hello Option ........................ 6
      4.2. PIM Assert Simple Packing Format ....................... 7
      4.3. PIM Assert Aggregation Packing Format .................. 8
   5. IANA Considerations ........................................ 11
   6. Security Considerations .................................... 11
   7. References ................................................. 11
      7.1. Normative References .................................. 11
      7.2. Informative References ................................ 11
   8. Acknowledgments ............................................ 12

1. Introduction

   In PIM-SM shared LAN networks, there is typically more than one
   upstream router. When duplicate data packets appear on the LAN, from
   different upstream routers, assert packets are sent from these
   routers to elect a single forwarder according to [RFC7761]. The PIM
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