EVPN Virtual Ethernet Segment
draft-ietf-bess-evpn-virtual-eth-segment-01
Internet Working Group A. Sajassi
Internet Draft P. Brissette
Category: Standards Track Cisco
R. Schell
Verizon
J. Drake
Juniper
J. Rabadan
Nokia
Expires: July 06, 2019 January 06, 2019
EVPN Virtual Ethernet Segment
draft-ietf-bess-evpn-virtual-eth-segment-01
Abstract
EVPN and PBB-EVPN introduce a family of solutions for multipoint
Ethernet services over MPLS/IP network with many advanced
capabilities 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 the 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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Sajassi et al. Expires July 06, 2019 [Page 1]
INTERNET DRAFT Virtual Ethernet Segment January 06, 2019
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Conventions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119.
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 . . . . . . . . . . . . . . . . . . . . 10
3.8. Fast Convergence . . . . . . . . . . . . . . . . . . . . . 11
4. Solution Overview . . . . . . . . . . . . . . . . . . . . . . . 11
4.1. EVPN DF Election for vES . . . . . . . . . . . . . . . . . 13
5. Failure Handling & Recovery . . . . . . . . . . . . . . . . . . 14
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