A Network Virtualization Overlay Solution Using Ethernet VPN (EVPN)
RFC 8365

Document Type RFC - Proposed Standard (March 2018; No errata)
Last updated 2018-03-29
Replaces draft-sd-l2vpn-evpn-overlay
Stream IETF
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Reviews
Stream WG state Submitted to IESG for Publication (wg milestone: Jun 2015 - Submit specification... )
Document shepherd Thomas Morin
Shepherd write-up Show (last changed 2017-12-12)
IESG IESG state RFC 8365 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alvaro Retana
Send notices to "Thomas Morin" <thomas.morin@orange.com>, aretana.ietf@gmail.com
IANA IANA review state IANA OK - Actions Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                   A. Sajassi, Ed.
Request for Comments: 8365                                         Cisco
Category: Standards Track                                  J. Drake, Ed.
ISSN: 2070-1721                                                  Juniper
                                                                N. Bitar
                                                                   Nokia
                                                              R. Shekhar
                                                                 Juniper
                                                               J. Uttaro
                                                                    AT&T
                                                           W. Henderickx
                                                                   Nokia
                                                              March 2018

  A Network Virtualization Overlay Solution Using Ethernet VPN (EVPN)

Abstract

   This document specifies how Ethernet VPN (EVPN) can be used as a
   Network Virtualization Overlay (NVO) solution and explores the
   various tunnel encapsulation options over IP and their impact on the
   EVPN control plane and procedures.  In particular, the following
   encapsulation options are analyzed: Virtual Extensible LAN (VXLAN),
   Network Virtualization using Generic Routing Encapsulation (NVGRE),
   and MPLS over GRE.  This specification is also applicable to Generic
   Network Virtualization Encapsulation (GENEVE); however, some
   incremental work is required, which will be covered in a separate
   document.  This document also specifies new multihoming procedures
   for split-horizon filtering and mass withdrawal.  It also specifies
   EVPN route constructions for VXLAN/NVGRE encapsulations and
   Autonomous System Border Router (ASBR) procedures for multihoming of
   Network Virtualization Edge (NVE) devices.

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/rfc8365.

Sajassi, et al.              Standards Track                    [Page 1]
RFC 8365         Network Virtualization Overlay Solution      March 2018

Copyright Notice

   Copyright (c) 2018 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.

Sajassi, et al.              Standards Track                    [Page 2]
RFC 8365         Network Virtualization Overlay Solution      March 2018

Table of Contents

   1. Introduction ....................................................4
   2. Requirements Notation and Conventions ...........................5
   3. Terminology .....................................................5
   4. EVPN Features ...................................................7
   5. Encapsulation Options for EVPN Overlays .........................8
      5.1. VXLAN/NVGRE Encapsulation ..................................8
           5.1.1. Virtual Identifiers Scope ...........................9
           5.1.2. Virtual Identifiers to EVI Mapping .................11
           5.1.3. Constructing EVPN BGP Routes .......................13
      5.2. MPLS over GRE .............................................15
   6. EVPN with Multiple Data-Plane Encapsulations ...................15
   7. Single-Homing NVEs - NVE Residing in Hypervisor ................16
      7.1. Impact on EVPN BGP Routes & Attributes for VXLAN/NVGRE ....16
      7.2. Impact on EVPN Procedures for VXLAN/NVGRE Encapsulations ..17
   8. Multihoming NVEs - NVE Residing in ToR Switch ..................18
      8.1. EVPN Multihoming Features .................................18
           8.1.1. Multihomed ES Auto-Discovery .......................18
           8.1.2. Fast Convergence and Mass Withdrawal ...............18
           8.1.3. Split-Horizon ......................................19
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