EVPN and BGP-based L2VPN Seamless Integration
draft-lin-bess-evpn-bgp-based-l2vpn-seamless-integ-00

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Last updated 2019-11-01
Replaces draft-evpn-bgp-based-l2vpn-seamless-integration
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BESS                                                              W. Lin
Internet-Draft                                    Juniper Networks, Inc.
Intended status: Standards Track                                  B. Wen
Expires: May 4, 2020                                            V. Kozak
                                                                 Comcast
                                                              J. Rabadan
                                                                   Nokia
                                                        November 1, 2019

             EVPN and BGP-based L2VPN Seamless Integration
         draft-lin-bess-evpn-bgp-based-l2vpn-seamless-integ-00

Abstract

   This document presents a seamless integration solution for BGP-based
   Layer-2 VPN (L2VPN) and EVPN to provide point-to-point Virtual
   Private Wire Service (VPWS).  In addition, this document also extends
   the existing seamless integration for multipoint Ethernet VPN service
   with all-active multihoming support.  The specified solution allows
   the coexistence of EVPN and L2VPN services under the same point-to-
   point or multipoint VPN instance.  By using this seamless integration
   solution, a service provider can introduce EVPN into their existing
   L2VPN network or migrate from an existing L2VPN based network to
   EVPN.

Requirements Language

   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.

Status of This Memo

   This Internet-Draft is submitted 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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Lin, et al.                Expires May 4, 2020                  [Page 1]
Internet-DraftEVPN and BGP-based L2VPN Seamless IntegrationNovember 2019

   This Internet-Draft will expire on May 4, 2020.

Copyright Notice

   Copyright (c) 2019 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  L2VPN PE,  EVPN PE and Composite PE . . . . . . . . . . . . .   5
   4.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Model of Operation for Seamless Integration of Point-to-point
       Ethernet VPN  . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Point-to-point Ethernet VPN . . . . . . . . . . . . . . .   6
     5.2.  Operation Model for Seamless Integration  . . . . . . . .   7
     5.3.  Seamless Integration for Single Homing or Multihoming . .   7
     5.4.  Control Plane Overview  . . . . . . . . . . . . . . . . .   8
     5.5.  Data Plane Overview . . . . . . . . . . . . . . . . . . .   8
   6.  Seamless Integration Solution for Point-to-point Ethernet VPN   8
     6.1.  Local ID and Remote ID  . . . . . . . . . . . . . . . . .   9
     6.2.  Composite PE Control Plane Procedure  . . . . . . . . . .   9
       6.2.1.  Auto-Discovery  . . . . . . . . . . . . . . . . . . .   9
       6.2.2.  Control Plane Signaling . . . . . . . . . . . . . . .  10
       6.2.3.  Status of an Attachment Circuit . . . . . . . . . . .  11
       6.2.4.  Layer 2 Extended Community  . . . . . . . . . . . . .  11
       6.2.5.  Port-active Multihoming and DF election . . . . . . .  12
       6.2.6.  Optimization  . . . . . . . . . . . . . . . . . . . .  12
     6.3.  Composite PE Forwarding Procedure . . . . . . . . . . . .  13
     6.4.  Composite PE Procedures for All-Active Multi-Homing . . .  15
   7.  Extended Seamless Integration Solution for Multipoint
       Ethernet VPN  . . . . . . . . . . . . . . . . . . . . . . . .  16
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