Ingress Replication Tunnels in Multicast VPN
RFC 7988
Document | Type |
RFC - Proposed Standard
(October 2016; No errata)
Was draft-ietf-bess-ir (bess WG)
|
|
---|---|---|---|
Authors | Eric Rosen , Karthik Subramanian , Zhaohui Zhang | ||
Last updated | 2016-10-06 | ||
Replaces | draft-rosen-l3vpn-ir | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Thomas Morin | ||
Shepherd write-up | Show (last changed 2016-04-25) | ||
IESG | IESG state | RFC 7988 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Alvaro Retana | ||
Send notices to | aretana@cisco.com | ||
IANA | IANA review state | IANA OK - No Actions Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) E. Rosen, Ed. Request for Comments: 7988 Juniper Networks, Inc. Updates: 6513, 6514 K. Subramanian Category: Standards Track Sproute Networks ISSN: 2070-1721 Z. Zhang Juniper Networks, Inc. October 2016 Ingress Replication Tunnels in Multicast VPN Abstract RFCs 6513, 6514, and other RFCs describe procedures by which a Service Provider may offer Multicast VPN (MVPN) service to its customers. These procedures create point-to-multipoint (P2MP) or multipoint-to-multipoint (MP2MP) trees across the Service Provider's backbone. One type of P2MP tree that may be used is known as an "Ingress Replication (IR) tunnel". In an IR tunnel, a parent node need not be directly connected to its child nodes. When a parent node has to send a multicast data packet to its n child nodes, it does not use Layer 2 multicast, IP multicast, or MPLS multicast to do so. Rather, it makes n individual copies, and then unicasts each copy, through an IP or MPLS unicast tunnel, to exactly one child node. While the prior MVPN specifications allow the use of IR tunnels, those specifications are not always very clear or explicit about how the MVPN protocol elements and procedures are applied to IR tunnels. This document updates RFCs 6513 and 6514 by adding additional details that are specific to the use of IR tunnels. 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/rfc7988. Rosen, et al. Standards Track [Page 1] RFC 7988 IR Tunnels in MVPN October 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 . . . . . . . . . . . . . . . . . . . . . . . . 3 2. What is an IR P-tunnel? . . . . . . . . . . . . . . . . . . . 5 3. How are IR P-tunnels identified? . . . . . . . . . . . . . . 7 4. How to Join an IR P-Tunnel . . . . . . . . . . . . . . . . . 9 4.1. Advertised IR P-Tunnels . . . . . . . . . . . . . . . . . 9 4.1.1. If the Leaf Information Required Bit Is Set . . . . . 10 4.1.2. If the Leaf Information Required Bit Is Not Set . . . 10 4.2. Unadvertised IR P-Tunnels . . . . . . . . . . . . . . . . 11 5. The PTA's Tunnel Identifier Field . . . . . . . . . . . . . . 11 6. A Note on IR P-Tunnels and Discarding Packets from the Wrong PE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7. The PTA's MPLS Label Field . . . . . . . . . . . . . . . . . 14 7.1. Leaf A-D Route Originated by an Egress PE . . . . . . . . 14 7.2. Leaf A-D Route Originated by an Intermediate Node . . . . 16 7.3. Intra-AS I-PMSI A-D Route . . . . . . . . . . . . . . . . 17 8. How A Child Node Prunes Itself from an IR P-Tunnel . . . . . 17 9. Parent Node Actions upon Receiving Leaf A-D Route . . . . . . 18 10. Use of Timers When Switching UMH . . . . . . . . . . . . . . 19 11. Security Considerations . . . . . . . . . . . . . . . . . . . 20 12. References . . . . . . . . . . . . . . . . . . . . . . . . . 21 12.1. Normative References . . . . . . . . . . . . . . . . . . 21 12.2. Informative References . . . . . . . . . . . . . . . . . 21 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 23 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 23 Rosen, et al. Standards Track [Page 2] RFC 7988 IR Tunnels in MVPN October 2016Show full document text