Usage and Applicability of Link State Vector Routing in Data Centers
draft-ietf-lsvr-applicability-02

Document Type Active Internet-Draft (lsvr WG)
Last updated 2019-05-01
Replaces draft-keyupate-lsvr-applicability
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LSVR                                                            K. Patel
Internet-Draft                                              Arrcus, Inc.
Intended status: Informational                                 A. Lindem
Expires: November 2, 2019                                  Cisco Systems
                                                                S. Zandi
                                                                G. Dawra
                                                                Linkedin
                                                             May 1, 2019

  Usage and Applicability of Link State Vector Routing in Data Centers
                  draft-ietf-lsvr-applicability-02.txt

Abstract

   This document discusses the usage and applicability of Link State
   Vector Routing (LSVR) extensions in data center networks utilizing
   CLOS or Fat-Tree topologies.  The document is intended to provide a
   simplified guide for the deployment of LSVR extensions.

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on November 2, 2019.

Copyright Notice

   Copyright (c) 2019 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
   (http://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

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Internet-Draft                                                  May 2019

   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 Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Recommended Reading . . . . . . . . . . . . . . . . . . . . .   3
   4.  Common Deployment Scenario  . . . . . . . . . . . . . . . . .   3
   5.  Justification for BGP SPF Extension . . . . . . . . . . . . .   4
   6.  LSVR Applicability to CLOS Networks . . . . . . . . . . . . .   5
     6.1.  Usage of BGP-LS SPF SAFI  . . . . . . . . . . . . . . . .   5
       6.1.1.  Relationship to Other BGP AFI/SAFI Tuples . . . . . .   6
     6.2.  Peering Models  . . . . . . . . . . . . . . . . . . . . .   6
       6.2.1.  Sparse Peering Model  . . . . . . . . . . . . . . . .   6
       6.2.2.  Bi-Connected Graph Heuristic  . . . . . . . . . . . .   7
     6.3.  BGP Spine/Leaf Topology Policy  . . . . . . . . . . . . .   7
     6.4.  BGP Peer Discovery Requirements . . . . . . . . . . . . .   8
     6.5.  BGP Peer Discovery  . . . . . . . . . . . . . . . . . . .   9
       6.5.1.  BGP Peer Discovery Alternatives . . . . . . . . . . .   9
       6.5.2.  Data Center Interconnect (DCI) Applicability  . . . .   9
     6.6.  Non-CLOS/FAT Tree Topology Applicability  . . . . . . . .  10
   7.  BGP Policy Applicability  . . . . . . . . . . . . . . . . . .  10
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     11.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   This document complements [I-D.ietf-lsvr-bgp-spf] by discussing the
   applicability of the technology in a simple and fairly common
   deployment scenario, which is described in Section 4.

   After describing the deployment scenario, Section 5 will describe the
   reasons for BGP modifications for such deployments.

   Once the control plane routing protocol requirements are described,
   Section 6 will cover the LSVR protocol enhancements to BGP to meet
   these requirements and their applicability to Data Center CLOS
   networks.

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