BGP Usage for SDWAN Overlay Networks
draft-ietf-bess-bgp-sdwan-usage-00

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Last updated 2020-08-03
Replaces draft-dunbar-bess-bgp-sdwan-usage
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Network Working Group                                         L. Dunbar
Internet Draft                                              J. Guichard
Intended status: Informational                                Futurewei
Expires: February 3, 2021                                 Ali Sajassi
                                                                  Cisco
                                                               J. Drake
                                                                Juniper
                                                               B. Najem
                                                            Bell Canada
                                                         Ayan Barnerjee
                                                              D. Carrel
                                                                 Cisco

                                                         August 3, 2020

                   BGP Usage for SDWAN Overlay Networks
                    draft-ietf-bess-bgp-sdwan-usage-00

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,
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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            August 3, 2020

   other groups may also distribute working documents as Internet-
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   This Internet-Draft will expire on February 3, 2009.

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.................6
      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. Scenario #1: Homogeneous WAN.............................10
      3.3. Scenario #2: CPE based SDWAN over Hybrid WAN Underlay....11
      3.4. Scenario #3: Private VPN PE based SDWAN..................14
   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. Underlay Network Properties Advertisement................20
      4.5. Why BGP as Control Plane for SDWAN?......................20
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