Extranet Multicast in BGP/IP MPLS VPNs
RFC 7900
| Document | Type |
RFC - Proposed Standard
(June 2016; No errata)
Updated by RFC 8534
|
|
|---|---|---|---|
| Last updated | 2016-06-21 | ||
| Replaces | draft-ietf-l3vpn-mvpn-extranet | ||
| Stream | IETF | ||
| Formats | plain text pdf html 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) | |
| 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 .................30
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