A Network Virtualization Overlay Solution using EVPN
draft-ietf-bess-evpn-overlay-08

Document Type Active Internet-Draft (bess WG)
Last updated 2017-08-31 (latest revision 2017-03-27)
Replaces draft-sd-l2vpn-evpn-overlay
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication (wg milestone: Jun 2015 - Submit specification... )
Doc Shepherd Follow-up Underway
Document shepherd Thomas Morin
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Send notices to "Thomas Morin" <thomas.morin@orange.com>, aretana@cisco.com
BESS Workgroup                                       A. Sajassi (Editor)
INTERNET-DRAFT                                                     Cisco
Intended Status: Standards Track                       J. Drake (Editor)
                                                                 Juniper
                                                                N. Bitar
                                                                   Nokia
                                                              R. Shekhar
                                                                 Juniper
                                                               J. Uttaro
                                                                    AT&T
                                                           W. Henderickx
                                                                   Nokia
                                                                        
Expires: September 27, 2017                               March 27, 2017

         A Network Virtualization Overlay Solution using EVPN  
                    draft-ietf-bess-evpn-overlay-08 

Abstract

   This document describes how Ethernet VPN (EVPN) can be used as an
   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: VXLAN, NVGRE, and MPLS over GRE.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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Sajassi-Drake et al.   Expires September 27, 2017               [Page 1]
INTERNET DRAFT                EVPN Overlay                March 27, 2017

Copyright and License Notice

   Copyright (c) 2017 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  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2  Specification of Requirements . . . . . . . . . . . . . . . . .  5
   3  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . .  5
   4 EVPN Features  . . . . . . . . . . . . . . . . . . . . . . . . .  6
   5 Encapsulation Options for EVPN Overlays  . . . . . . . . . . . .  7
     5.1 VXLAN/NVGRE Encapsulation  . . . . . . . . . . . . . . . . .  7
       5.1.1 Virtual Identifiers Scope  . . . . . . . . . . . . . . .  8
         5.1.1.1 Data Center Interconnect with Gateway  . . . . . . .  8
         5.1.1.2 Data Center Interconnect without Gateway . . . . . .  9
       5.1.2 Virtual Identifiers to EVI Mapping . . . . . . . . . . .  9
         5.1.2.1 Auto Derivation of RT  . . . . . . . . . . . . . . . 10
       5.1.3  Constructing EVPN BGP Routes  . . . . . . . . . . . . . 11
     5.2 MPLS over GRE  . . . . . . . . . . . . . . . . . . . . . . . 13
   6  EVPN with Multiple Data Plane Encapsulations  . . . . . . . . . 13
   7  Single-Homing NVEs - NVE Residing in Hypervisor . . . . . . . . 14
     7.1 Impact on EVPN BGP Routes & Attributes for VXLAN/NVGRE
         Encapsulation  . . . . . . . . . . . . . . . . . . . . . . . 14
     7.2 Impact on EVPN Procedures for VXLAN/NVGRE Encapsulation  . . 15
   8  Multi-Homing NVEs - NVE Residing in ToR Switch  . . . . . . . . 16
     8.1  EVPN Multi-Homing Features  . . . . . . . . . . . . . . . . 16
       8.1.1 Multi-homed Ethernet Segment Auto-Discovery  . . . . . . 16
       8.1.2 Fast Convergence and Mass Withdraw . . . . . . . . . . . 16
       8.1.3 Split-Horizon  . . . . . . . . . . . . . . . . . . . . . 17
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