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Requirements for Ethernet VPN (EVPN)
RFC 7209

Document type: RFC - Informational (May 2014; No errata)
Document stream: IETF
Last updated: 2014-05-21
Other versions: plain text, pdf, html

IETF State: WG Document
Consensus: Yes
Document shepherd: Giles Heron
Shepherd Write-Up: Last changed 2013-09-03

IESG State: RFC 7209 (Informational)
IANA Action State: No IC
Responsible AD: Adrian Farrel
Send notices to: l2vpn-chairs@ietf.org, draft-ietf-l2vpn-evpn-req@ietf.org

Internet Engineering Task Force (IETF)                        A. Sajassi
Request for Comments: 7209                                         Cisco
Category: Informational                                      R. Aggarwal
ISSN: 2070-1721                                                   Arktan
                                                               J. Uttaro
                                                                    AT&T
                                                                N. Bitar
                                                                 Verizon
                                                           W. Henderickx
                                                          Alcatel-Lucent
                                                                A. Isaac
                                                               Bloomberg
                                                                May 2014

                  Requirements for Ethernet VPN (EVPN)

Abstract

   The widespread adoption of Ethernet L2VPN services and the advent of
   new applications for the technology (e.g., data center interconnect)
   have culminated in a new set of requirements that are not readily
   addressable by the current Virtual Private LAN Service (VPLS)
   solution.  In particular, multihoming with all-active forwarding is
   not supported, and there's no existing solution to leverage
   Multipoint-to-Multipoint (MP2MP) Label Switched Paths (LSPs) for
   optimizing the delivery of multi-destination frames.  Furthermore,
   the provisioning of VPLS, even in the context of BGP-based auto-
   discovery, requires network operators to specify various network
   parameters on top of the access configuration.  This document
   specifies the requirements for an Ethernet VPN (EVPN) solution, which
   addresses the above issues.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see 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/rfc7209.

Sajassi, et al.               Informational                     [Page 1]
RFC 7209              Requirements for Ethernet VPN             May 2014

Copyright Notice

   Copyright (c) 2014 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. Specification of Requirements ...................................4
   3. Terminology .....................................................4
   4. Redundancy Requirements .........................................5
      4.1. Flow-Based Load Balancing ..................................5
      4.2. Flow-Based Multipathing ....................................6
      4.3. Geo-redundant PE Nodes .....................................7
      4.4. Optimal Traffic Forwarding .................................7
      4.5. Support for Flexible Redundancy Grouping ...................8
      4.6. Multihomed Network .........................................8
   5. Multicast Optimization Requirements .............................9
   6. Ease of Provisioning Requirements ...............................9
   7. New Service Interface Requirements .............................10
   8. Fast Convergence ...............................................12
   9. Flood Suppression ..............................................12
   10. Supporting Flexible VPN Topologies and Policies ...............12
   11. Security Considerations .......................................13
   12. Normative References ..........................................13
   13. Informative References ........................................14
   14. Contributors ..................................................15

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