Tuning the Behavior of IGMP and MLD for Routers in Mobile and Wireless Networks
draft-ietf-multimob-igmp-mld-tuning-03

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Last updated 2012-01-17 (latest revision 2011-10-31)
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MULTIMOB Working Group                                         H. Asaeda
Internet-Draft                                           Keio University
Intended status: Informational                                    H. Liu
Expires: July 20, 2012                                             Q. Wu
                                                     Huawei Technologies
                                                        January 17, 2012

 Tuning the Behavior of IGMP and MLD for Routers in Mobile and Wireless
                                Networks
                 draft-ietf-multimob-igmp-mld-tuning-03

Abstract

   IGMP and MLD are the protocols used by hosts and multicast routers to
   exchange their IP multicast group memberships with each other.  This
   document describes the ways of IGMPv3 and MLDv2 protocol optimization
   for mobility, and aims to become a guideline for tuning of IGMPv3/
   MLDv2 Queries and timer and counter values.

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on July 20, 2012.

Copyright Notice

   Copyright (c) 2012 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   to this document.  Code Components extracted from this document must

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Internet-Draft     Tuning the Behavior of IGMP and MLD      January 2012

   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 . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Explicit Tracking of Membership Status . . . . . . . . . . . .  4
   4.  Tuning IGMP/MLD Timers and Values  . . . . . . . . . . . . . .  4
     4.1.  Tuning IGMP/MLD General Query Interval . . . . . . . . . .  5
     4.2.  Tuning IGMP/MLD Query Response Interval  . . . . . . . . .  6
     4.3.  Tuning Last Member Query Timer (LMQT) and Last
           Listener Query Timer (LLQT)  . . . . . . . . . . . . . . .  6
     4.4.  Tuning Startup Query Interval  . . . . . . . . . . . . . .  7
     4.5.  Tuning Robustness Variable . . . . . . . . . . . . . . . .  7
     4.6.  Tuning Scenarios for Various Mobile IP Networks  . . . . .  8
   5.  Destination Address of Specific Query  . . . . . . . . . . . .  9
   6.  Interoperability . . . . . . . . . . . . . . . . . . . . . . .  9
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 10
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 11
   Appendix A.  Unicasting General Query  . . . . . . . . . . . . . . 11
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

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1.  Introduction

   The Internet Group Management Protocol (IGMP) [1] for IPv4 and the
   Multicast Listener Discovery Protocol (MLD) [2] for IPv6 are the
   standard protocols for hosts to initiate joining or leaving of
   multicast sessions.  These protocols must be also supported by
   multicast routers or IGMP/MLD proxies [9] that maintain multicast
   membership information on their downstream interfaces.  Conceptually,
   IGMP and MLD work on both wireless and mobile networks.  However,
   wireless access technologies operate on a shared medium or a point-
   to-point link with limited spectrum and bandwidth.  In many wireless
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