BGP Usage for SDWAN Overlay Networks
draft-dunbar-bess-bgp-sdwan-usage-03

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Last updated 2019-11-04
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Network Working Group                                         L. Dunbar
Internet Draft                                              J. Guichard
Intended status: Informational                                Futurewei
Expires: May 4, 2020                                        Ali Sajassi
                                                                  Cisco
                                                               J. Drake
                                                                Juniper
                                                         Ayan Barnerjee
                                                              D. Carrel
                                                                 Cisco

                                                       November 4, 2019

                   BGP Usage for SDWAN Overlay Networks
                   draft-dunbar-bess-bgp-sdwan-usage-03

Abstract

   The document describes three distinct SDWAN scenarios and discusses
   the applicability of BGP for each of those scenarios. The goal of
   the document is to make it easier for future SDWAN control plane
   protocols discussion.

   SDWAN edge nodes are commonly interconnected by multiple underlay
   networks that are owned and managed by different network providers.
   A BGP-based control plane is chosen for handling large number of
   SDWAN edge nodes with little manual intervention.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   This Internet-Draft is submitted in full conformance with the
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   as an RFC and to translate it into languages other than English.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that

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Internet-Draft            BGP Usage for SDWAN          November 4, 2019

   other groups may also distribute working documents as Internet-
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Copyright Notice

   Copyright (c) 2019 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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Table of Contents

   1. Introduction...................................................3
   2. Conventions used in this document..............................4
   3. Use Case Scenario Description and Requirements.................5
      3.1. Requirements..............................................5
         3.1.1. Client Service Requirement...........................5
         3.1.2. Application Flow based Segmentation..................6
         3.1.3. SDWAN Node Provisioning..............................7
      3.2. Scenarios #1: Homogeneous WAN.............................8
      3.3. Scenario #2: SDWAN WAN ports to VPN's PEs and to Internet10

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      3.4. Scenario #3: SDWAN WAN ports to MPLS VPN and the Internet12
   4. Provisioning Model............................................14
      4.1. Client Service Provisioning Model........................14
      4.2. WAN Ports Provisioning Model.............................14
         4.2.1. Why BGP as Control Plane for SDWAN WAN Ports
         Registration?..............................................15
   5. SDWAN Traffic Forwarding Walk Through.........................16
      5.1. SDWAN Network Startup Procedures.........................16
      5.2. Packet Walk-Through for Scenario #1......................16
      5.3. Packet Walk-Through for Scenario #2......................17
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