PIM Assert Message Packing
draft-liu-pim-assert-packing-00

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Last updated 2019-03-05
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PIM Working Group                                            Yisong Liu
Internet Draft                                               M. McBride
Intended status: Standards Track                              T. Eckert
Expires: September 6, 2019                          Huawei Technologies
                                                          March 6, 2019

                        PIM Assert Message Packing
                      draft-liu-pim-assert-packing-00

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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Abstract

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

   In PIM-SM shared 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 ..................................... 3
      2.3. Financial Services ..................................... 4
      2.4. IPTV broadcast video ................................... 4
   3. Solution .................................................... 4
      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 ............................................... 5
      4.1. PIM Assert Packing Hello Option ........................ 6
      4.2. PIM Assert Simple Packing Format ....................... 6
      4.3. PIM Assert Aggregation Packing Format .................. 7
   5. IANA Considerations ......................................... 9
   6. Security Considerations ..................................... 9
   7. References .................................................. 9
      7.1. Normative References ................................... 9
      7.2. Informative References ................................ 10
   8. Acknowledgments ............................................ 10

1. Introduction

   In PIM-SM shared 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
   assert packets are sent periodically to keep the assert state.  The
   PIM assert packet carries information about a single multicast
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