BGP MPLS-Based Ethernet VPN
draft-ietf-bess-rfc7432bis-00

Document Type Active Internet-Draft (bess WG)
Authors Ali Sajassi  , John Drake  , Jorge Rabadan 
Last updated 2020-12-22
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BESS Working Group                                       A. Sajassi, Ed.
Internet-Draft                                                     Cisco
Intended status: Standards Track                                J. Drake
Expires: June 24, 2021                                           Juniper
                                                              J. Rabadan
                                                                   Nokia
                                                       December 21, 2020

                      BGP MPLS-Based Ethernet VPN
                     draft-ietf-bess-rfc7432bis-00

Abstract

   This document describes procedures for BGP MPLS-based Ethernet VPNs
   (EVPN).  The procedures described here meet the requirements
   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 June 24, 2021.

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   Copyright (c) 2020 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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   include Simplified BSD License text as described in Section 4.e of

Sajassi, et al.           Expires June 24, 2021                 [Page 1]
Internet-Draft         BGP MPLS-Based Ethernet VPN         December 2020

   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 . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  BGP MPLS-Based EVPN Overview  . . . . . . . . . . . . . . . .   6
   5.  Ethernet Segment  . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Ethernet Tag ID . . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  VLAN-Based Service Interface  . . . . . . . . . . . . . .  11
     6.2.  VLAN Bundle Service Interface . . . . . . . . . . . . . .  11
       6.2.1.  Port-Based Service Interface  . . . . . . . . . . . .  11
     6.3.  VLAN-Aware Bundle Service Interface . . . . . . . . . . .  11
       6.3.1.  Port-Based VLAN-Aware Service Interface . . . . . . .  12
     6.4.  EVPN PE Model . . . . . . . . . . . . . . . . . . . . . .  12
   7.  BGP EVPN Routes . . . . . . . . . . . . . . . . . . . . . . .  14
     7.1.  Ethernet Auto-discovery Route . . . . . . . . . . . . . .  15
     7.2.  MAC/IP Advertisement Route  . . . . . . . . . . . . . . .  15
     7.3.  Inclusive Multicast Ethernet Tag Route  . . . . . . . . .  16
     7.4.  Ethernet Segment Route  . . . . . . . . . . . . . . . . .  17
     7.5.  ESI Label Extended Community  . . . . . . . . . . . . . .  17
     7.6.  ES-Import Route Target  . . . . . . . . . . . . . . . . .  18
     7.7.  MAC Mobility Extended Community . . . . . . . . . . . . .  19
     7.8.  Default Gateway Extended Community  . . . . . . . . . . .  19
     7.9.  EVPN Layer 2 Attributes Extended Community  . . . . . . .  20
       7.9.1.  EVPN Layer 2 Attributes Partitioning  . . . . . . . .  20
     7.10. Route Distinguisher Assignment per MAC-VRF  . . . . . . .  22
     7.11. Route Targets . . . . . . . . . . . . . . . . . . . . . .  22
       7.11.1.  Auto-derivation from the Ethernet Tag ID . . . . . .  22
     7.12. Route Prioritization  . . . . . . . . . . . . . . . . . .  23
   8.  Multihoming Functions . . . . . . . . . . . . . . . . . . . .  23
     8.1.  Multihomed Ethernet Segment Auto-discovery  . . . . . . .  23
       8.1.1.  Constructing the Ethernet Segment Route . . . . . . .  23
     8.2.  Fast Convergence  . . . . . . . . . . . . . . . . . . . .  24
       8.2.1.  Constructing Ethernet A-D per Ethernet Segment Route   24
         8.2.1.1.  Ethernet A-D Route Targets  . . . . . . . . . . .  25
     8.3.  Split Horizon . . . . . . . . . . . . . . . . . . . . . .  25
       8.3.1.  ESI Label Assignment  . . . . . . . . . . . . . . . .  26
         8.3.1.1.  Ingress Replication . . . . . . . . . . . . . . .  26
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