BGP Usage for SDWAN Overlay Networks
draft-dunbar-bess-bgp-sdwan-usage-07

Document Type Active Internet-Draft (candidate for bess WG)
Last updated 2020-06-23 (latest revision 2020-04-28)
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Network Working Group                                         L. Dunbar
Internet Draft                                              J. Guichard
Intended status: Informational                                Futurewei
Expires: October 29, 2020                                 Ali Sajassi
                                                                  Cisco
                                                               J. Drake
                                                                Juniper
                                                               B. Najem
                                                            Bell Canada
                                                         Ayan Barnerjee
                                                              D. Carrel
                                                                 Cisco

                                                         April 29, 2020

                   BGP Usage for SDWAN Overlay Networks
                   draft-dunbar-bess-bgp-sdwan-usage-07

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 demonstrate how BGP-based control plane is used
   for large scale SDWAN overlay networks with little manual
   intervention.

   SDWAN edge nodes are commonly interconnected by multiple underlay
   networks which can be owned and managed by different network
   providers.

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
   provisions of BCP 78 and BCP 79. This document may not be modified,
   and derivative works of it may not be created, except to publish it
   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            April 29, 2020

   other groups may also distribute working documents as Internet-
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   This Internet-Draft will expire on October 29, 2020.

Copyright Notice

   Copyright (c) 2020 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..............................................6
         3.1.1. Supporting Multiple SDWAN Segmentations..............6
         3.1.2. Client Service Requirement...........................6
         3.1.3. Application Flow Based Segmentation..................7
         3.1.4. Zero Touch Provisioning..............................8
         3.1.5. Constrained Propagation of SDWAN Edge Properties.....9

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      3.2. Scenarios #1: Homogeneous WAN............................10
      3.3. Scenario #2: SDWAN WAN ports to VPN's PEs and to Internet11
      3.4. Scenario #3: SDWAN WAN ports to MPLS VPN and the Internet14
   4. BGP Walk Through..............................................15
      4.1. BGP Walk Through for Homogeneous SDWAN...................15
      4.2. BGP Walk Through for Application Flow Based Segmentation.18
      4.3. Client Service Provisioning Model........................19
      4.4. WAN Ports Provisioning Model.............................20
      4.5. Why BGP as Control Plane for SDWAN?......................20
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