IPv4 and IPv6 Infrastructure Addresses in BGP Updates for Multicast VPN
RFC 6515
Document | Type |
RFC - Proposed Standard
(February 2012; Errata)
Updates RFC 6514
|
|
---|---|---|---|
Authors | Eric Rosen , Rahul Aggarwal | ||
Last updated | 2019-05-28 | ||
Replaces | draft-rosen-l3vpn-mvpn-infra-addrs | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Ben Niven-Jenkins | ||
IESG | IESG state | RFC 6515 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Stewart Bryant | ||
IESG note | Ben Niven-Jenkins (ben@niven-jenkins.co.uk) is the document shepherd. | ||
Send notices to | (None) |
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 2Show full document text