Interconnecting Millions Of Endpoints With Segment Routing
draft-filsfils-spring-large-scale-interconnect-12
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2018-11-14
(latest revision 2018-08-29)
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conflict-review-filsfils-spring-large-scale-interconnect |
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Adrian Farrel
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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
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
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
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
Filsfils, et al. Expires March 2, 2019 [Page 1]
Internet-Draft Large Scale Segment Routing August 2018
(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. 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:
Filsfils, et al. Expires March 2, 2019 [Page 2]
Internet-Draft Large Scale Segment Routing August 2018
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