BGP MPLS-Based Ethernet VPN
draft-ietf-bess-rfc7432bis-00
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)".
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This Internet-Draft will expire on June 24, 2021.
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Internet-Draft BGP MPLS-Based Ethernet VPN December 2020
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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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