Interconnecting Millions Of Endpoints With Segment Routing
draft-filsfils-spring-large-scale-interconnect-13
Network Working Group C. Filsfils, Ed.
Internet-Draft S. Previdi
Intended status: Informational Cisco Systems, Inc.
Expires: September 6, 2019 G. Dawra, Ed.
LinkedIn
W. Henderickx
Nokia
D. Cooper
Level 3
March 5, 2019
Interconnecting Millions Of Endpoints With Segment Routing
draft-filsfils-spring-large-scale-interconnect-13
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. This may be
achieved by inherert scaleable nature of Segment Routing and designed
proposed in this document.
Status of This Memo
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This Internet-Draft will expire on September 6, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Internet-Draft Large Scale Segment Routing March 2019
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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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