Multicast VPN State Damping
RFC 7899

Document Type RFC - Proposed Standard (June 2016; No errata)
Updates RFC 6514
Last updated 2016-06-28
Replaces draft-morin-bess-multicast-damping
Stream IETF
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Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Martin Vigoureux
Shepherd write-up Show (last changed 2016-01-28)
IESG IESG state RFC 7899 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alvaro Retana
Send notices to aretana@cisco.com
IANA IANA review state Version Changed - Review Needed
IANA action state No IANA Actions
Internet Engineering Task Force (IETF)                     T. Morin, Ed.
Request for Comments: 7899                                  S. Litkowski
Updates: 6514                                                     Orange
Category: Standards Track                                       K. Patel
ISSN: 2070-1721                                            Cisco Systems
                                                                Z. Zhang
                                                               R. Kebler
                                                                 J. Haas
                                                        Juniper Networks
                                                               June 2016

                      Multicast VPN State Damping

Abstract

   This document describes procedures to damp Multicast VPN (MVPN)
   routing state changes and control the effect of the churn due to the
   multicast dynamicity in customer sites.  The procedures described in
   this document are applicable to BGP-based multicast VPN and help
   avoid uncontrolled control-plane load increase in the core routing
   infrastructure.  The new procedures proposed were inspired by BGP
   unicast route damping principles that have been adapted to multicast.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7899.

Morin, et al.                Standards Track                    [Page 1]
RFC 7899                      MVPN Damping                     June 2016

Copyright Notice

   Copyright (c) 2016 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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   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 . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Existing Mechanisms . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Rate-Limiting Multicast Control Traffic . . . . . . . . .   5
     4.2.  Existing PIM, IGMP, and MLD Timers  . . . . . . . . . . .   6
     4.3.  BGP Route Damping . . . . . . . . . . . . . . . . . . . .   6
   5.  Procedures for Multicast State Damping  . . . . . . . . . . .   7
     5.1.  PIM Procedures  . . . . . . . . . . . . . . . . . . . . .   7
     5.2.  Procedures for Multicast VPN State Damping  . . . . . . .  10
   6.  Procedures for P-Tunnel State Damping . . . . . . . . . . . .  12
     6.1.  Damping MVPN P-Tunnel Change Events . . . . . . . . . . .  12
     6.2.  Procedures for Ethernet VPNs  . . . . . . . . . . . . . .  13
   7.  Operational Considerations  . . . . . . . . . . . . . . . . .  13
     7.1.  Enabling Multicast Damping  . . . . . . . . . . . . . . .  13
     7.2.  Troubleshooting and Monitoring  . . . . . . . . . . . . .  13
     7.3.  Default and Maximum Values  . . . . . . . . . . . . . . .  13
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  16
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  17
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  18

Morin, et al.                Standards Track                    [Page 2]
RFC 7899                      MVPN Damping                     June 2016

1.  Introduction

   In a multicast VPN [RFC6513] deployed with BGP-based procedures
   [RFC6514], when receivers in VPN sites join and leave a given
   multicast group or channel through multicast membership control
   protocols (Internet Group Management Protocol (IGMP) [RFC3376] and
   Multicast Listener Discovery (MLD) [RFC3810]), multicast routing
   protocols accordingly adjust multicast routing states and P-multicast
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