Multicast VPN Using Bit Index Explicit Replication (BIER)
RFC 8556
Document | Type |
RFC - Proposed Standard
(April 2019; No errata)
Was draft-ietf-bier-mvpn (bier WG)
|
|
---|---|---|---|
Authors | Eric Rosen , Mahesh Sivakumar , Sam Aldrin , Andrew Dolganow , Tony Przygienda | ||
Last updated | 2019-04-08 | ||
Replaces | draft-rosen-l3vpn-mvpn-bier | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Nabeel Cocker | ||
Shepherd write-up | Show (last changed 2017-12-01) | ||
IESG | IESG state | RFC 8556 (Proposed Standard) | |
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Alvaro Retana | ||
Send notices to | Nabeel Cocker <nabeel.cocker@nokia.com>, aretana.ietf@gmail.com | ||
IANA | IANA review state | IANA OK - Actions Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) E. Rosen, Ed. Request for Comments: 8556 M. Sivakumar Category: Standards Track T. Przygienda ISSN: 2070-1721 Juniper Networks, Inc. S. Aldrin Google, Inc. A. Dolganow Nokia April 2018 Multicast VPN Using Bit Index Explicit Replication (BIER) Abstract The Multicast Virtual Private Network (MVPN) specifications require the use of multicast tunnels ("P-tunnels") that traverse a service provider's backbone network. The P-tunnels are used for carrying multicast traffic across the backbone. A variety of P-tunnel types are supported. Bit Index Explicit Replication (BIER) is a new architecture that provides optimal multicast forwarding through a "multicast domain", without requiring intermediate routers to maintain any per-flow state or to engage in an explicit tree-building protocol. This document specifies the protocol and procedures that allow MVPN to use BIER as the method of carrying multicast traffic over a service provider's backbone network. 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/rfc8556. Rosen, et al. Standards Track [Page 1] RFC 8556 MVPN with BIER April 2018 Copyright Notice Copyright (c) 2018 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 . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Use of the PMSI Tunnel Attribute in x-PMSI A-D Routes . . . . 5 2.1. MPLS Label . . . . . . . . . . . . . . . . . . . . . . . 7 2.2. Explicit Tracking . . . . . . . . . . . . . . . . . . . . 9 2.2.1. Using the LIR Flag . . . . . . . . . . . . . . . . . 10 2.2.2. Using the LIR-pF Flag . . . . . . . . . . . . . . . . 10 3. Use of the PMSI Tunnel Attribute in Leaf A-D Routes . . . . . 11 4. Data Plane . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1. Encapsulation and Transmission . . . . . . . . . . . . . 12 4.2. Disposition . . . . . . . . . . . . . . . . . . . . . . . 14 4.2.1. At a BFER That Is an Egress PE . . . . . . . . . . . 14 4.2.2. At a BFER That Is a P-tunnel Segmentation Boundary . 14 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15 6. Security Considerations . . . . . . . . . . . . . . . . . . . 15 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.1. Normative References . . . . . . . . . . . . . . . . . . 15 7.2. Informative References . . . . . . . . . . . . . . . . . 16 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 16 Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17 Rosen, et al. Standards Track [Page 2] RFC 8556 MVPN with BIER April 2018 1. Introduction [RFC6513] and [RFC6514] specify the protocols and procedures that a Service Provider (SP) can use to provide Multicast Virtual Private Network (MVPN) service to its customers. Multicast tunnels are created through an SP's backbone network; these are known as "P-tunnels". The P-tunnels are used for carrying multicast traffic across the backbone. The MVPN specifications allow the use of several different kinds of P-tunnel technology.Show full document text