Multi-site EVPN based VXLAN using Border Gateways
draft-sharma-bess-multi-site-evpn-00

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Last updated 2018-06-26
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BESS Working Group                                        R. Sharma, Ed.
Internet-Draft                                          A. Banerjee, Ed.
Intended status: Standards Track                              A. Sajassi
Expires: December 27, 2018                                  L. Krattiger
                                                             R. Sivaramu
                                                           Cisco Systems
                                                           June 25, 2018

           Multi-site EVPN based VXLAN using Border Gateways
                  draft-sharma-bess-multi-site-evpn-00

Abstract

   This document describes the procedures for interconnecting two or
   more BGP based Ethernet VPN (EVPN) sites in a scalable fashion over
   an IP-only network.  The motivation is to support extension of EVPN
   sites without having to rely on typical Data Center Interconnect
   (DCI) technologies like MPLS/VPLS.  The requirements for such a
   deployment are very similar to the ones specified in RFC 7209 --
   "Requirements for Ethernet VPN (EVPN)".

Status of This Memo

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

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   This Internet-Draft will expire on December 27, 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
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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Sharma, et al.          Expires December 27, 2018               [Page 1]
Internet-Draft               Multi-site EVPN                   June 2018

   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
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Multi-Site EVPN Overview  . . . . . . . . . . . . . . . . . .   4
     3.1.  MS-EVPN Interconnect Requirements . . . . . . . . . . . .   4
     3.2.  MS-EVPN Interconnect concept and framework  . . . . . . .   5
   4.  Multi-site EVPN Interconnect Procedures . . . . . . . . . . .   7
     4.1.  Border Gateway Discovery  . . . . . . . . . . . . . . . .   7
     4.2.  Border Gateway Provisioning . . . . . . . . . . . . . . .   8
       4.2.1.  Border Gateway Designated Forwarder Election  . . . .   9
       4.2.2.  Anycast Border Gateway  . . . . . . . . . . . . . . .   9
       4.2.3.  Multi-path Border Gateway . . . . . . . . . . . . . .  10
     4.3.  EVPN route processing at Border Gateway . . . . . . . . .  10
     4.4.  Multi-Destination tree between Border Gateways  . . . . .  12
     4.5.  Inter-site Unicast traffic  . . . . . . . . . . . . . . .  12
     4.6.  Inter-site Multi-destination traffic  . . . . . . . . . .  13
     4.7.  Host Mobility . . . . . . . . . . . . . . . . . . . . . .  13
   5.  Convergence . . . . . . . . . . . . . . . . . . . . . . . . .  13
     5.1.  Fabric to Border Gateway Failure  . . . . . . . . . . . .  13
     5.2.  Border Gateway to Border Gateway Failures . . . . . . . .  13
   6.  Interoperability  . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Isolation of Fault Domains  . . . . . . . . . . . . . . . . .  14
   8.  MVPN with Multi-site EVPN . . . . . . . . . . . . . . . . . .  14
     8.1.  Inter-Site MI-PMSI  . . . . . . . . . . . . . . . . . . .  14
     8.2.  Stitching of customer multicast trees across sites  . . .  15
     8.3.  RP placement across sites . . . . . . . . . . . . . . . .  15
     8.4.  Inter-Site S-PMSI . . . . . . . . . . . . . . . . . . . .  15
   9.  Observations with Multi-site EVPN . . . . . . . . . . . . . .  15
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   12. Security Considerations . . . . . . . . . . . . . . . . . . .  16
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
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