BGP UPDATE for SDWAN Edge Discovery
draft-dunbar-idr-sdwan-edge-discovery-00

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Last updated 2020-07-02
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Network Working Group                                         L. Dunbar
Internet Draft                                                Futurewei
Intended status: Standard                                      S. Hares
Expires: January 2, 2021                      Hickory Hill Consulting
                                                               R. Raszuk
                                                            Bloomberg LP
                                                            K. Majumdar
                                                               CommScope
                                                            July 2, 2020

                    BGP UPDATE for SDWAN Edge Discovery
                 draft-dunbar-idr-sdwan-edge-discovery-00

Abstract

   The document describes encoding of BGP UPDATE messages for the SDWAN
   edge node discovery.

   In the context of this document, BGP Route Reflectors (RR) is the
   component of the SDWAN Controller that receives the BGP UPDATE from
   SDWAN edges and in turns propagates the information to the intended
   peers that are authorized to communicate via the SDWAN overlay
   network.

Status of this Memo

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

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Internet-Draft       BGP for SDWAN Edge Discovery             July 2020

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   This Internet-Draft will expire on Dec 2, 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..............................3
   3. Framework of SDWAN Edge Discovery..............................4
      3.1. The Objectives of SDWAN Edge Discovery....................4
      3.2. Basic Schemes.............................................4
      3.3. Edge Node Discovery using BGP.............................7
   4. BGP UPDATE to Support SDWAN Segmentation.......................8
      4.1. Constrained Propagation of Edge Capability................9
      4.2. SDWAN Segmentation for Control Plane.....................10
      4.3. SDWAN Instance Identifier in Data Plane..................12
   5. IPsec Tunnel Type for client's routes in Tunnel-Encap.........12
      5.1. Encoding.................................................12
      5.2. Encoding Example.........................................14
         5.2.1. Multiple IPsec SAs Sharing One Tunnel End Point.....14
         5.2.2. Multiple IPsec SAs Having different Tunnel End Points16
   6. Underlay Network Properties Advertisement using MP-NLRI.......16
      6.1. Controller Facilitated IPsec Tunnels for SDWAN Networks..17
      6.2. NLRI encoding for Underlay Network Properties............19
      6.3. Underlay Properties encoding in the Tunnel Path Attribute22
      6.4. Extended Sub-TLV for NAT.................................23

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      6.5. IPsec Security Association Property Sub-TLVs.............25
      6.6. IPsec SA Nonce Sub-TLV...................................26
      6.7. IPsec Public Key Sub-TLV.................................27
      6.8. IPsec SA Proposal Sub-TLV................................28
      6.9. ISP of the Underlay network Sub-TLV .....................28
      6.10. Simplified IPsec Security Association sub-TLV...........29
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