PIM Designated Router Load Balancing
draft-ietf-pim-drlb-13

Document Type Active Internet-Draft (pim WG)
Last updated 2019-11-07 (latest revision 2019-10-24)
Replaces draft-hou-pim-drlb
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Mike McBride
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IESG IESG state IESG Evaluation
Consensus Boilerplate Yes
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Needs 9 more YES or NO OBJECTION positions to pass.
Responsible AD Alvaro Retana
Send notices to aretana.ietf@gmail.com
IANA IANA review state IANA OK - Actions Needed
Network Working Group                                             Y. Cai
Internet-Draft                                                     H. Ou
Intended status: Standards Track                           Alibaba Group
Expires: April 25, 2020                                    S. Vallepalli
                                                               M. Mishra
                                                               S. Venaas
                                                     Cisco Systems, Inc.
                                                                A. Green
                                                         British Telecom
                                                        October 23, 2019

                  PIM Designated Router Load Balancing
                         draft-ietf-pim-drlb-13

Abstract

   On a multi-access network, one of the PIM-SM routers is elected as a
   Designated Router.  One of the responsibilities of the Designated
   Router is to track local multicast listeners and forward data to
   these listeners if the group is operating in PIM-SM.  This document
   specifies a modification to the PIM-SM protocol that allows more than
   one of the PIM-SM routers to take on this responsibility so that the
   forwarding load can be distributed among multiple routers.

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 25, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Cai, et al.              Expires April 25, 2020                 [Page 1]
Internet-Draft    PIM Designated Router Load Balancing      October 2019

   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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Applicability . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Functional Overview . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  GDR Candidates  . . . . . . . . . . . . . . . . . . . . .   6
   5.  Protocol Specification  . . . . . . . . . . . . . . . . . . .   7
     5.1.  Hash Mask and Hash Algorithm  . . . . . . . . . . . . . .   7
     5.2.  Modulo Hash Algorithm . . . . . . . . . . . . . . . . . .   8
       5.2.1.  Modulo Hash Algorithm Examples  . . . . . . . . . . .   9
       5.2.2.  Limitations . . . . . . . . . . . . . . . . . . . . .  10
     5.3.  PIM Hello Options . . . . . . . . . . . . . . . . . . . .  10
       5.3.1.  PIM DR Load Balancing Capability (DRLB-Cap) Hello
               Option  . . . . . . . . . . . . . . . . . . . . . . .  11
       5.3.2.  PIM DR Load Balancing List (DRLB-List) Hello Option .  11
     5.4.  PIM DR Operation  . . . . . . . . . . . . . . . . . . . .  13
     5.5.  PIM GDR Candidate Operation . . . . . . . . . . . . . . .  13
     5.6.  DRLB-List Hello Option Processing . . . . . . . . . . . .  14
     5.7.  PIM Assert Modification . . . . . . . . . . . . . . . . .  15
     5.8.  Backward Compatibility  . . . . . . . . . . . . . . . . .  16
   6.  Operational Considerations  . . . . . . . . . . . . . . . . .  16
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
     7.1.  Initial registry  . . . . . . . . . . . . . . . . . . . .  17
     7.2.  Assignment of new Hash Algorithms . . . . . . . . . . . .  17
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   9.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  18
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  18
     10.2.  Informative References . . . . . . . . . . . . . . . . .  18
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19
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