Explicit Tracking with Wildcard Routes in Multicast VPN
RFC 8534

Document Type RFC - Proposed Standard (February 2019; No errata)
Last updated 2019-02-19
Replaces draft-dolganow-bess-mvpn-expl-track
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Stephane Litkowski
Shepherd write-up Show (last changed 2018-04-20)
IESG IESG state RFC 8534 (Proposed Standard)
Consensus Boilerplate Yes
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Responsible AD Martin Vigoureux
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IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                       A. Dolganow
Request for Comments: 8534                                   J. Kotalwar
Updates: 6514, 6625, 7524, 7582, 7900                              Nokia
Category: Standards Track                                  E. Rosen, Ed.
ISSN: 2070-1721                                                 Z. Zhang
                                                  Juniper Networks, Inc.
                                                           February 2019

        Explicit Tracking with Wildcard Routes in Multicast VPN

Abstract

   The base Multicast VPN (MVPN) specifications (RFCs 6513 and 6514)
   provide procedures to allow a multicast ingress node to invoke
   "explicit tracking" for a multicast flow or set of flows, thus
   learning the egress nodes for that flow or set of flows.  However,
   the specifications are not completely clear about how the explicit
   tracking procedures work in certain scenarios.  This document
   provides the necessary clarifications.  It also specifies a new,
   optimized explicit-tracking procedure.  This new procedure allows an
   ingress node, by sending a single message, to request explicit
   tracking of each of a set of flows, where the set of flows is
   specified using a wildcard mechanism.  This document updates RFCs
   6514, 6625, 7524, 7582, and 7900.

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
   https://www.rfc-editor.org/info/rfc8534.

Dolganow, et al.             Standards Track                    [Page 1]
RFC 8534          MVPN: Explicit Tracking and Wildcards    February 2019

Copyright Notice

   Copyright (c) 2019 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
   (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
   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  The Explicit-Tracking Flags . . . . . . . . . . . . . . . . .   5
   3.  Match for Tracking versus Match for Reception . . . . . . . .   7
   4.  Ingress Node Initiation of Tracking . . . . . . . . . . . . .   9
   5.  Egress Node Response to the Match for Tracking  . . . . . . .  11
     5.1.  General Egress Node Procedures  . . . . . . . . . . . . .  11
     5.2.  Responding to the LIR-pF Flag . . . . . . . . . . . . . .  12
     5.3.  When the Egress Node Is an ABR or ASBR  . . . . . . . . .  15
   6.  Ingress Node Handling of Received Leaf A-D Routes with
       LIR-pF Set  . . . . . . . . . . . . . . . . . . . . . . . . .  16
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  19
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  20
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  20
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   The base Multicast VPN (MVPN) specifications, [RFC6513] and
   [RFC6514], define the "Selective Provider Multicast Service Interface
   Auto-Discovery route" (S-PMSI A-D route).

   Per those RFCs, the S-PMSI A-D route contains a Network Layer
   Reachability Information (NLRI) field that identifies a particular
   multicast flow.  In the terminology of those RFCs, each flow is
   denoted by (C-S,C-G), where C-S is an IP source address and C-G is an
   IP multicast address, both in the address space of a VPN customer.
   The (C-S,C-G) of the multicast flow is encoded into the NLRI field.

Dolganow, et al.             Standards Track                    [Page 2]
RFC 8534          MVPN: Explicit Tracking and Wildcards    February 2019

   An S-PMSI A-D route also carries a PMSI Tunnel attribute (PTA).
   Typically, the PTA is used to identify a tunnel through the provider
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