Extranet Multicast in BGP/IP MPLS VPNs
RFC 7900
Document | Type |
RFC - Proposed Standard
(June 2016; No errata)
Updated by RFC 8534
|
|
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Authors | Yakov Rekhter , Eric Rosen , Rahul Aggarwal , Yiqun Cai , Thomas Morin | ||
Last updated | 2016-06-21 | ||
Replaces | draft-ietf-l3vpn-mvpn-extranet | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Martin Vigoureux | ||
Shepherd write-up | Show (last changed 2015-11-12) | ||
IESG | IESG state | RFC 7900 (Proposed Standard) | |
Action Holders |
(None)
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||
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 | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) Y. Rekhter, Ed. Request for Comments: 7900 E. Rosen, Ed. Updates: 6513, 6514, 6625 Juniper Networks, Inc. Category: Standards Track R. Aggarwal ISSN: 2070-1721 Arktan Y. Cai Alibaba Group T. Morin Orange June 2016 Extranet Multicast in BGP/IP MPLS VPNs Abstract Previous RFCs specify the procedures necessary to allow IP multicast traffic to travel from one site to another within a BGP/MPLS IP VPN (Virtual Private Network). However, it is sometimes desirable to allow multicast traffic whose source is in one VPN to be received by systems that are in another VPN. This is known as a "Multicast VPN (MVPN) extranet". This document updates RFCs 6513, 6514, and 6625 by specifying the procedures that are necessary in order to provide extranet MVPN service. 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/rfc7900. Rekhter, et al. Standards Track [Page 1] RFC 7900 Extranet Multicast in BGP/IP MPLS VPNs 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 ....................................................4 1.1. Terminology ................................................4 1.2. Scope ......................................................7 1.2.1. Customer Multicast Control Protocols ................7 1.2.2. Provider Multicast Control Protocols ................7 1.3. Clarification on Use of Route Distinguishers ...............8 1.4. Overview ...................................................9 2. Extranets and Overlapping Address Spaces .......................12 2.1. Ambiguity: P-Tunnel with Extranet/Non-extranet Flows ......14 2.2. Ambiguity: P-Tunnel with Multiple Extranet Flows ..........16 2.3. Preventing Misdelivery in These Scenarios .................18 2.3.1. Do Not Deliver Packets from the Wrong P-tunnel .....18 2.3.2. Policies to Prevent Ambiguity on a P-Tunnel ........20 3. Extranet Transmission Models ...................................21 3.1. Transmitting an Extranet C-Flow on a Single PMSI ..........21 3.1.1. Without Extranet Separation ........................22 3.1.2. With Extranet Separation ...........................22 3.2. Transmitting an Extranet C-Flow over Multiple PMSIs .......23 4. Distribution of Routes That Match C-S/C-RP Addresses ...........23 4.1. UMH-Eligible Routes .......................................23 4.1.1. Extranet Separation ................................24 4.2. Distribution of Unicast Routes Matching C-RPs and DRs .....25 4.3. Route Targets and Ambiguous UMH-Eligible Routes ...........26 4.4. Dynamically Marking Extranet Routes .......................27 4.4.1. The Extranet Source Extended Community .............27 4.4.2. Distribution of Extranet Source Extended Community ..........................................29 4.5. The Extranet Separation Extended Community ................30 Rekhter, et al. Standards Track [Page 2] RFC 7900 Extranet Multicast in BGP/IP MPLS VPNs June 2016 5. Origination and Distribution of BGP A-D Routes .................30Show full document text