IPv4 and IPv6 Infrastructure Addresses in BGP Updates for Multicast VPN
RFC 6515

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 05

Internet Engineering Task Force (IETF)                       R. Aggarwal
Request for Comments: 6515                        Juniper Networks, Inc.
Updates: 6514                                                   E. Rosen
Category: Standard Track                             Cisco Systems, Inc.
ISSN: 2070-1721                                            February 2012

               IPv4 and IPv6 Infrastructure Addresses in
                     BGP Updates for Multicast VPN

Abstract

   To provide Multicast VPN (MVPN) service, Provider Edge routers
   originate BGP Update messages that carry Multicast-VPN ("MCAST-VPN")
   BGP routes; they also originate unicast VPN routes that carry MVPN-
   specific attributes.  These routes encode addresses from the
   customer's address space, as well as addresses from the provider's
   address space.  These two address spaces are independent, and the
   address family (IPv4 or IPv6) of the two spaces may or may not be the
   same.  These routes always contain an "address family" field that
   specifies whether the customer addresses are IPv4 addresses or
   whether they are IPv6 addresses.  However, there is no field that
   explicitly specifies the address family of the provider addresses.
   To ensure interoperability, this document specifies that provider
   IPv4 addresses are always encoded in these update messages as 4-octet
   addresses, and that the distinction between IPv4 and IPv6 is signaled
   solely by the length of the address field.  Specific cases are
   explained in detail.  This document updates RFC 6514.

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 5741.

   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/rfc6515.

Aggarwal & Rosen             Standards Track                    [Page 1]
RFC 6515              MVPN Infrastructure Addresses        February 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
   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. IPv4 and IPv6 Addresses in MCAST-VPN Routes ................2
      1.2. Specification of Requirements ..............................4
      1.3. Acronyms Used in This Document .............................4
   2. PE Addresses in MCAST-VPN Routes ................................4
   3. VRF Route Import Extended Community .............................5
   4. PMSI Tunnel Attributes in I-PMSI A-D Routes .....................6
      4.1. Relationship to AFI Value ..................................6
      4.2. Relationship to Next Hop Address Family ....................6
   5. IANA Considerations .............................................7
   6. Security Considerations .........................................7
   7. Acknowledgments .................................................7
   8. Normative References ............................................7
   9. Informative References ..........................................7

1. Introduction

1.1.  IPv4 and IPv6 Addresses in MCAST-VPN Routes

   [MVPN-BGP] defines a new set of BGP route types that are used by
   service providers (SPs) to provide Multicast Virtual Private Network
   service to their customers.  These routes have a newly defined BGP
   NLRI, the "MCAST-VPN" NLRI.  The MCAST-VPN NLRI is carried in the
   NLRI field of the MP_REACH_NLRI/MP_UNREACH_NLRI attributes defined in
   [BGP-MP].  The SAFI field of the MP_REACH_NLRI/MP_UNREACH_NLRI
   attribute is used to identify the NLRI as being an MCAST-VPN NLRI.

Aggarwal & Rosen             Standards Track                    [Page 2]
RFC 6515              MVPN Infrastructure Addresses        February 2012

   When the SAFI field of an MP_REACH_NLRI/MP_UNREACH_NLRI attribute has
   the "MCAST-VPN" value, the AFI field has two defined values: 1 and 2.
   AFI 1 indicates that any customer multicast addresses occurring in
   the MP_REACH_NLRI/MP_UNREACH_NLRI attribute are IPv4 addresses; AFI 2