Explicit Tracking with Wildcard Routes in Multicast VPN
RFC 8534
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Type |
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RFC - Proposed Standard
(February 2019; No errata)
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Last updated |
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2019-02-19
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Replaces |
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draft-dolganow-bess-mvpn-expl-track
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Stephane Litkowski
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Shepherd write-up |
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Show
(last changed 2018-04-20)
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| IESG |
IESG state |
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RFC 8534 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Martin Vigoureux
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) A. Dolganow
Request for Comments: 8534 J. Kotalwar
Updates: 6514, 6625, 7524, 7582, 7900 Nokia
Category: Standards Track E. Rosen, Ed.
ISSN: 2070-1721 Z. Zhang
Juniper Networks, Inc.
February 2019
Explicit Tracking with Wildcard Routes in Multicast VPN
Abstract
The base Multicast VPN (MVPN) specifications (RFCs 6513 and 6514)
provide procedures to allow a multicast ingress node to invoke
"explicit tracking" for a multicast flow or set of flows, thus
learning the egress nodes for that flow or set of flows. However,
the specifications are not completely clear about how the explicit
tracking procedures work in certain scenarios. This document
provides the necessary clarifications. It also specifies a new,
optimized explicit-tracking procedure. This new procedure allows an
ingress node, by sending a single message, to request explicit
tracking of each of a set of flows, where the set of flows is
specified using a wildcard mechanism. This document updates RFCs
6514, 6625, 7524, 7582, and 7900.
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/rfc8534.
Dolganow, et al. Standards Track [Page 1]
RFC 8534 MVPN: Explicit Tracking and Wildcards February 2019
Copyright Notice
Copyright (c) 2019 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 . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
2. The Explicit-Tracking Flags . . . . . . . . . . . . . . . . . 5
3. Match for Tracking versus Match for Reception . . . . . . . . 7
4. Ingress Node Initiation of Tracking . . . . . . . . . . . . . 9
5. Egress Node Response to the Match for Tracking . . . . . . . 11
5.1. General Egress Node Procedures . . . . . . . . . . . . . 11
5.2. Responding to the LIR-pF Flag . . . . . . . . . . . . . . 12
5.3. When the Egress Node Is an ABR or ASBR . . . . . . . . . 15
6. Ingress Node Handling of Received Leaf A-D Routes with
LIR-pF Set . . . . . . . . . . . . . . . . . . . . . . . . . 16
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
8. Security Considerations . . . . . . . . . . . . . . . . . . . 18
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 19
9.1. Normative References . . . . . . . . . . . . . . . . . . 19
9.2. Informative References . . . . . . . . . . . . . . . . . 20
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 20
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction
The base Multicast VPN (MVPN) specifications, [RFC6513] and
[RFC6514], define the "Selective Provider Multicast Service Interface
Auto-Discovery route" (S-PMSI A-D route).
Per those RFCs, the S-PMSI A-D route contains a Network Layer
Reachability Information (NLRI) field that identifies a particular
multicast flow. In the terminology of those RFCs, each flow is
denoted by (C-S,C-G), where C-S is an IP source address and C-G is an
IP multicast address, both in the address space of a VPN customer.
The (C-S,C-G) of the multicast flow is encoded into the NLRI field.
Dolganow, et al. Standards Track [Page 2]
RFC 8534 MVPN: Explicit Tracking and Wildcards February 2019
An S-PMSI A-D route also carries a PMSI Tunnel attribute (PTA).
Typically, the PTA is used to identify a tunnel through the provider
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