PIM Designated Router Load Balancing
draft-ietf-pim-drlb-06

Document Type Active Internet-Draft (pim WG)
Last updated 2017-06-28
Replaces draft-hou-pim-drlb
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Network Working Group                                         Yiqun. Cai
Internet-Draft                                                 Heidi. Ou
Intended status: Standards Track                           Alibaba Group
Expires: December 30, 2017                               Sri. Vallepalli
                                                       Mankamana. Mishra
                                                            Stig. Venaas
                                                           Cisco Systems
                                                             Andy. Green
                                                         British Telecom
                                                           June 28, 2017

                  PIM Designated Router Load Balancing
                         draft-ietf-pim-drlb-06

Abstract

   On a multi-access network, one of the PIM routers is elected as a
   Designated Router (DR).  On the last hop LAN, the PIM DR is
   responsible for tracking local multicast listeners and forwarding
   traffic to these listeners if the group is operating in PIM-SM.  In
   this document, we propose a modification to the PIM-SM protocol that
   allows more than one of these last hop routers to be selected so that
   the forwarding load can be distributed among these routers.

Status of This Memo

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

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   This Internet-Draft will expire on December 30, 2017.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Cai, et al.             Expires December 30, 2017               [Page 1]
Internet-Draft    PIM Designated Router Load Balancing         June 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Applicability . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Functional Overview . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  GDR Candidates  . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  Hash Mask and Hash Algorithm  . . . . . . . . . . . . . .   7
     4.3.  Modulo Hash Algorithm . . . . . . . . . . . . . . . . . .   8
     4.4.  PIM Hello Options . . . . . . . . . . . . . . . . . . . .   9
   5.  Hello Option Formats  . . . . . . . . . . . . . . . . . . . .  10
     5.1.  PIM DR Load Balancing Capability (DRLBC) Hello Option . .  10
     5.2.  PIM DR Load Balancing GDR (DRLBGDR) Hello Option  . . . .  10
   6.  Protocol Specification  . . . . . . . . . . . . . . . . . . .  11
     6.1.  PIM DR Operation  . . . . . . . . . . . . . . . . . . . .  12
     6.2.  PIM GDR Candidate Operation . . . . . . . . . . . . . . .  12
       6.2.1.  Router receives new DRLBGDR . . . . . . . . . . . . .  13
       6.2.2.  Router receives updated DRLBGDR . . . . . . . . . . .  13
     6.3.  PIM Assert Modification . . . . . . . . . . . . . . . . .  14
   7.  Compatibility . . . . . . . . . . . . . . . . . . . . . . . .  15
   8.  Manageability Considerations  . . . . . . . . . . . . . . . .  15
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  16
   11. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  16
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  16
     12.2.  Informative References . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction
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