EVPN Virtual Ethernet Segment
draft-ietf-bess-evpn-virtual-eth-segment-04
Internet Working Group A. Sajassi
Internet Draft P. Brissette
Category: Standards Track Cisco
R. Schell
Verizon
J. Drake
Juniper
J. Rabadan
Nokia
Expires: July 18, 2019 January 18, 2019
EVPN Virtual Ethernet Segment
draft-ietf-bess-evpn-virtual-eth-segment-04
Abstract
EVPN and PBB-EVPN introduce a family of solutions for multipoint
Ethernet services over MPLS/IP network with many advanced features
among which their multi-homing capabilities. These solutions define
two types of multi-homing for an Ethernet Segment (ES): 1) Single-
Active and 2) All-Active, where an Ethernet Segment is defined as a
set of links between the multi-homed device/network and a set of PE
devices that they are connected to.
Some Service Providers want to extend the concept of the physical
links in an ES to Ethernet Virtual Circuits (EVCs) where many of such
EVCs can be aggregated on a single physical External Network-to-
Network Interface (ENNI). An ES that consists of a set of EVCs
instead of physical links is referred to as a virtual ES (vES). This
draft describes the requirements and the extensions needed to support
vES in EVPN and PBB-EVPN.
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79.
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INTERNET DRAFT Virtual Ethernet Segment January 18, 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Virtual Ethernet Segments in Access Ethernet Networks . . . 4
1.2 Virtual Ethernet Segments in Access MPLS Networks . . . . . 5
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1. Single-Homed & Multi-Homed Virtual Ethernet Segments . . . 8
3.2. Scalability . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3. Local Switching . . . . . . . . . . . . . . . . . . . . . . 9
3.4. EVC Service Types . . . . . . . . . . . . . . . . . . . . . 9
3.5. Designated Forwarder (DF) Election . . . . . . . . . . . . 10
3.6. OAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.7. Failure & Recovery . . . . . . . . . . . . . . . . . . . . 11
3.8. Fast Convergence . . . . . . . . . . . . . . . . . . . . . 11
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