Interconnecting Millions Of Endpoints With Segment Routing
draft-filsfils-spring-large-scale-interconnect-12

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Last updated 2018-11-14 (latest revision 2018-08-29)
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Network Working Group                                   C. Filsfils, Ed.
Internet-Draft                                                S. Previdi
Intended status: Informational                       Cisco Systems, Inc.
Expires: March 2, 2019                                     G. Dawra, Ed.
                                                                LinkedIn
                                                           W. Henderickx
                                                                   Nokia
                                                               D. Cooper
                                                                 Level 3
                                                         August 29, 2018

       Interconnecting Millions Of Endpoints With Segment Routing
           draft-filsfils-spring-large-scale-interconnect-12

Abstract

   This document describes an application of Segment Routing to scale
   the network to support hundreds of thousands of network nodes, and
   tens of millions of physical underlay endpoints.  This use-case can
   be applied to the interconnection of massive-scale DCs and/or large
   aggregation networks.  Forwarding tables of midpoint and leaf nodes
   only require a few tens of thousands of entries.

Status of This Memo

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

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

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Reference Design  . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Control Plane . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Illustration of the scale . . . . . . . . . . . . . . . . . .   5
   6.  Design Options  . . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  Segment Routing Global Block(SRGB) Size . . . . . . . . .   6
     6.2.  Redistribution of Agg nodes routes  . . . . . . . . . . .   6
     6.3.  Sizing and hierarchy  . . . . . . . . . . . . . . . . . .   6
     6.4.  Local Segments to Hosts/Servers . . . . . . . . . . . . .   7
     6.5.  Compressed SRTE policies  . . . . . . . . . . . . . . . .   7
   7.  Deployment Model  . . . . . . . . . . . . . . . . . . . . . .   7
   8.  Benefits  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Simplified operations . . . . . . . . . . . . . . . . . .   8
     8.2.  Inter-domain SLA  . . . . . . . . . . . . . . . . . . . .   8
     8.3.  Scale . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.4.  ECMP  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   10. Manageability Considerations  . . . . . . . . . . . . . . . .   9
   11. Security Considerations . . . . . . . . . . . . . . . . . . .   9
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   13. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   9
   14. Informative References  . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   This document describes how SR can be used to interconnect millions
   of endpoints.The following terminology is used in this document:

2.  Terminology

   The following terms and abbreviations are used in this document:

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