Interconnect Solution for EVPN Overlay networks
draft-ietf-bess-dci-evpn-overlay-10
BESS Workgroup J. Rabadan (Ed.)
Internet Draft S. Sathappan
Intended status: Standards Track W. Henderickx
Nokia
A. Sajassi
Cisco
J. Drake
Juniper
Expires: September 3, 2018 March 2, 2018
Interconnect Solution for EVPN Overlay networks
draft-ietf-bess-dci-evpn-overlay-10
Abstract
This document describes how Network Virtualization Overlays (NVO) can
be connected to a Wide Area Network (WAN) in order to extend the
layer-2 connectivity required for some tenants. The solution analyzes
the interaction between NVO networks running Ethernet Virtual Private
Networks (EVPN) and other L2VPN technologies used in the WAN, such as
Virtual Private LAN Services (VPLS), VPLS extensions for Provider
Backbone Bridging (PBB-VPLS), EVPN or PBB-EVPN. It also describes how
the existing technical specifications apply to the Interconnection
and extends the EVPN procedures needed in some cases. In particular,
this document describes how EVPN routes are processed on Gateways
(GWs) that interconnect EVPN-Overlay and EVPN-MPLS networks, as well
as the Interconnect Ethernet Segment (I-ES) to provide multi-homing,
and the use of the Unknown MAC route to avoid MAC scale issues on
Data Center Network Virtualization Edge (NVE) devices.
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
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Drafts.
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Internet-Draft Interconnect for EVPN-Overlays March 2, 2018
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Table of Contents
1. Conventions and Terminology . . . . . . . . . . . . . . . . . . 3
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Decoupled Interconnect solution for EVPN overlay networks . . . 6
3.1. Interconnect requirements . . . . . . . . . . . . . . . . . 7
3.2. VLAN-based hand-off . . . . . . . . . . . . . . . . . . . . 8
3.3. PW-based (Pseudowire-based) hand-off . . . . . . . . . . . 8
3.4. Multi-homing solution on the GWs . . . . . . . . . . . . . 9
3.5. Gateway Optimizations . . . . . . . . . . . . . . . . . . . 9
3.5.1. MAC Address Advertisement Control . . . . . . . . . . . 9
3.5.2. ARP/ND flooding control . . . . . . . . . . . . . . . . 10
3.5.3. Handling failures between GW and WAN Edge routers . . . 11
4. Integrated Interconnect solution for EVPN overlay networks . . 11
4.1. Interconnect requirements . . . . . . . . . . . . . . . . . 12
4.2. VPLS Interconnect for EVPN-Overlay networks . . . . . . . . 13
4.2.1. Control/Data Plane setup procedures on the GWs . . . . 13
4.2.2. Multi-homing procedures on the GWs . . . . . . . . . . 14
4.3. PBB-VPLS Interconnect for EVPN-Overlay networks . . . . . . 14
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