Automatic discovery and configuration of the network fabric in Massive Scale Data Centers
draft-heitz-idr-msdc-fabric-autoconf-01

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Last updated 2018-11-04
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Routing Area Working Group                                      J. Heitz
Internet-Draft                                               K. Majumdar
Intended status: Standards Track                               A. Lindem
Expires: May 8, 2019                                               Cisco
                                                        November 4, 2018

 Automatic discovery and configuration of the network fabric in Massive
                           Scale Data Centers
                draft-heitz-idr-msdc-fabric-autoconf-01

Abstract

   A switching fabric in a massive scale data center can comprise many
   10,000's of switches and 100,000's of IP hosts.  To connect and
   configure a network of such size needs automation to avoid errors.
   Zero Touch Provisioning (ZTP) protocols exist.  These can configure
   IP devices that are reachable by the ZTP agents.  A method to combine
   BGP, DHCPv6 and SRv6 with ZTP that can be used to discover and
   configure an entire network of devices is described.  It is designed
   to scale well, because each networked device is not required to know
   about more than its directly connected neighborhood.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

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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   This Internet-Draft will expire on May 8, 2019.

Heitz, et al.              Expires May 8, 2019                  [Page 1]
Internet-Draft        MSDC Fabric Autoconfiguration        November 2018

Copyright Notice

   Copyright (c) 2018 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Solution Overview . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Solution Details  . . . . . . . . . . . . . . . . . . . . . .   5
   5.  DHCP Procedures . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Inconsistent Endpoints  . . . . . . . . . . . . . . . . .   7
   6.  Link State Database . . . . . . . . . . . . . . . . . . . . .   7
   7.  BGP Procedures  . . . . . . . . . . . . . . . . . . . . . . .   8
   8.  Segment Routing Procedures  . . . . . . . . . . . . . . . . .   9
   9.  Final Configuration . . . . . . . . . . . . . . . . . . . . .   9
   10. Connecting a New Controller to a Network in Production  . . .  10
   11. Multiple Controllers  . . . . . . . . . . . . . . . . . . . .  10
   12. Security Considerations . . . . . . . . . . . . . . . . . . .  10
   13. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   14. Acknowldgements . . . . . . . . . . . . . . . . . . . . . . .  11
   15. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     15.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     15.2.  Informative References . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   RFC7938 [RFC7938] defines a massive scale data center as one that
   contains over one hundred thousand servers.  It describes the
   advantages of using BGP [RFC4271] as a routing protocol in a Clos
   switching fabric that connects these servers.  A fabric design that
   scales to one million servers is considered enough for the forseeable
   future and is the design goal of this document.  Of course, the
   design should also work for smaller fabrics.  A switch fabric to
   connect one million servers will consist of between 35000 and 130000
   switches and 1.5 million to 8 million links, depending on how
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