Encoding Multipoint LDP (mLDP) Forwarding Equivalence Classes (FECs) in the NLRI of BGP MCAST-VPN Routes
RFC 7441
| Document | Type |
RFC - Proposed Standard
(January 2015; No errata)
Updates RFC 6514
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-rosen-l3vpn-mvpn-mldp-nlri | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication (wg milestone: Mar 2014 - Submit specification... ) | |
| Document shepherd | Martin Vigoureux | ||
| Shepherd write-up | Show (last changed 2014-10-19) | ||
| IESG | IESG state | RFC 7441 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Adrian Farrel | ||
| Send notices to | l3vpn-chairs@ietf.org | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) IJ. Wijnands
Request for Comments: 7441 Cisco Systems, Inc.
Updates: 6514 E. Rosen
Category: Standards Track Juniper Networks, Inc.
ISSN: 2070-1721 U. Joorde
Deutsche Telekom
January 2015
Encoding Multipoint LDP (mLDP) Forwarding Equivalence Classes (FECs)
in the NLRI of BGP MCAST-VPN Routes
Abstract
Many service providers offer "BGP/MPLS IP VPN" service to their
customers. Existing IETF standards specify the procedures and
protocols that a service provider uses in order to offer this service
to customers who have IP unicast and IP multicast traffic in their
VPNs. It is also desirable to be able to support customers who have
MPLS multicast traffic in their VPNs. This document specifies the
procedures and protocol extensions that are needed to support
customers who use the Multipoint LDP (mLDP) as the control protocol
for their MPLS multicast traffic. Existing standards do provide some
support for customers who use mLDP, but only under a restrictive set
of circumstances. This document generalizes the existing support to
include all cases where the customer uses mLDP, without any
restrictions. This document updates RFC 6514.
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 5741.
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/rfc7441.
Wijnands, et al. Standards Track [Page 1]
RFC 7441 mLDP FECs in NLRI of BGP MCAST-VPN Routes January 2015
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Table of Contents
1. Introduction ....................................................2
2. Why This Document is Needed .....................................3
3. Encoding an mLDP FEC in the MCAST-VPN NLRI ......................5
4. Wildcards .......................................................7
5. IANA Considerations .............................................7
6. Security Considerations .........................................8
7. References ......................................................9
7.1. Normative References .......................................9
7.2. Informative References .....................................9
Acknowledgments ...................................................10
Authors' Addresses ................................................10
1. Introduction
Many service providers (SPs) offer BGP/MPLS IP VPN service to their
customers. When a customer has IP multicast traffic in its VPN, the
service provider needs to signal the customer multicast states across
the backbone. A customer with IP multicast traffic is typically
using PIM (Protocol Independent Multicast) [PIM] and/or IGMP
(Internet Group Management Protocol) [IGMP] as the multicast control
protocol in its VPN. The IP multicast states of these protocols are
commonly denoted as "(S,G)" and/or "(*,G)" states, where "S" is a
multicast source address and "G" is a multicast group address.
[MVPN-BGP] specifies the way an SP may use BGP to signal a customer's
IP multicast states across the SP backbone. This is done by using
Multiprotocol BGP Updates whose Subsequent Address Family Identifier
(SAFI) values contain the codepoint for MCAST-VPN (as defined in
[MVPN-BGP]). The NLRI (Network Layer Reachability Information) field
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