EVPN All Active Usage Enhancements
draft-eastlake-bess-evpn-vxlan-bypass-vtep-00

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Last updated 2018-03-05
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TRILL Working Group                                      Donald Eastlake
INTERNET-DRAFT                                                Zhenbin Li
                                                          Shunwan Zhuang
                                                                  Huawei
Intended status: Proposed Standard
Expires: September 4, 2018                                 March 5, 2018

                   EVPN All Active Usage Enhancements
          <draft-eastlake-bess-evpn-vxlan-bypass-vtep-00.txt>

Abstract

   A principal feature of EVPN is the ability to support multihoming
   from a customer equipment (CE) to multiple provider edge equipment
   (PE) with all-active links. This draft specifies a mechanism to
   simplify PEs used with VXLAN tunnels and enhance VXLAN Active-Active
   reliability.

Status of This Memo

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

   Distribution of this document is unlimited. Comments should be sent
   to the BESS working group mailing list <bess@ietf.org>.

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D. Eastlake, et al                                              [Page 1]
INTERNET-DRAFT                                    EVPN VXLAN Bypass VTEP

Table of Contents

      1. Introduction............................................3
      1.1 Terminology and Acronyms...............................3

      2. VXLAN Gateway High Reliability..........................4
      3. Detailed Problem and Solution Requirement...............6

      4. The Bypass VXLAN Extended Community Attribute...........7
      5. Control Plane Processing................................9

      6.  Data Packet Processing................................10
      6.1 Layer 2 Unicast Packet Forwarding.....................10
      6.1.1 Uplink..............................................10
      6.1.2 Downlink............................................10
      6.2  BUM Packet Forwarding................................11

      7. IANA Considerations....................................12
      7.1 IPv4 Specific.........................................12
      7.2 IPv6 Specific.........................................12
      8. Security Considerations................................12

      Acknowledgements..........................................12
      Contributors..............................................13

      Normative References......................................13
      Informative References....................................13

      Authors' Addresses........................................14

D. Eastlake, et al                                              [Page 2]
INTERNET-DRAFT                                    EVPN VXLAN Bypass VTEP

1. Introduction

   A principal feature of EVPN is the ability to support multihoming
   from a customer equipment (CE) to multiple provider edge equipment
   (PE) with links used in the all-active redundancy mode. That mode is
   where a device is multihomed to a group of two or more PEs and where
   all PEs in such a redundancy group can forward traffic to/from the
   multihomed device or network for a given VLAN [RFC7209]. This draft
   specifies a VXLAN gateway mechanism to simplify PE processing in the
   multi-homed case and enhance VXLAN Active-Active reliability.

1.1 Terminology and Acronyms

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

   This document uses the following acronyms and terms:

   All-Active Redundancy Mode - When a device is multihomed to a group
      of two or more PEs and when all PEs in such redundancy group can
      forward traffic to/from the multihomed device or network for a
      given VLAN.

   BUM - Broadcast, Unknown unicast, and Multicast.

   CE - Customer Edge equipment.

   DCI - Data Center Interconnect.

   ESI - Ethernet Segment Identifier - A unique non-zero identifier that
      identifies an Ethernet segment.

   NVE - Network Virtualization Edge.

   PE - Provider Edge equipment.
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