Automatic discovery and configuration of the network fabric in Massive Scale Data Centers
draft-heitz-idr-msdc-fabric-autoconf-00

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Routing Area Working Group                                      J. Heitz
Internet-Draft                                               K. Majumdar
Intended status: Standards Track                                   Cisco
Expires: April 25, 2019                                 October 22, 2018

 Automatic discovery and configuration of the network fabric in Massive
                           Scale Data Centers
                draft-heitz-idr-msdc-fabric-autoconf-00

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 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.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on April 25, 2019.

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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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Solution Overview . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Solution Details  . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Acknowldgements . . . . . . . . . . . . . . . . . . . . . . .   7
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   [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 redundantly the servers
   are connected to the fabric and the level of oversubscription in the
   fabric.  A switch that needs to store, send and operate on hundreds
   of routes is clearly cheaper than one that needs to store, send and
   operate on millions of links.

   Such a network requires significant configuration on each switch and
   many cables to connect.  This is an onerous task without automation.

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2.  Requirements

   To configure a fabric network for massive scale data centers.

   To detect every wiring error.  For example, a spine switch that has a
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