Interconnecting Millions of Endpoints with Segment Routing
RFC 8604
| Document | Type |
RFC - Informational
(June 2019; No errata)
Was draft-filsfils-spring-large-scale-interconnect (individual)
|
|
|---|---|---|---|
| Authors | Clarence Filsfils , Stefano Previdi , Gaurav Dawra , Wim Henderickx , Dave Cooper | ||
| Last updated | 2019-06-17 | ||
| Stream | ISE | ||
| Formats | plain text html pdf htmlized bibtex | ||
| IETF conflict review | conflict-review-filsfils-spring-large-scale-interconnect | ||
| Stream | ISE state | Published RFC | |
| Consensus Boilerplate | Unknown | ||
| Document shepherd | Adrian Farrel | ||
| Shepherd write-up | Show (last changed 2018-09-16) | ||
| IESG | IESG state | RFC 8604 (Informational) | |
| Telechat date | |||
| Responsible AD | (None) | ||
| Send notices to | "Martin Vigoureux" <martin.vigoureux@nokia.com>, Adrian Farrel <rfc-ise@rfc-editor.org> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | No IANA Actions | ||
Independent Submission C. Filsfils, Ed.
Request for Comments: 8604 Cisco Systems, Inc.
Category: Informational S. Previdi
ISSN: 2070-1721 Huawei Technologies
G. Dawra, Ed.
LinkedIn
W. Henderickx
Nokia
D. Cooper
CenturyLink
June 2019
Interconnecting Millions of Endpoints with Segment Routing
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 Data Centers (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 the inherently scaleable nature of Segment Routing and
the design proposed in this document.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This is a contribution to the RFC Series, independently of any other
RFC stream. The RFC Editor has chosen to publish this document at
its discretion and makes no statement about its value for
implementation or deployment. Documents approved for publication by
the RFC Editor are not candidates for any level of Internet Standard;
see Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8604.
Filsfils, et al. Informational [Page 1]
RFC 8604 Large-Scale Segment Routing June 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
(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.
Table of Contents
1. Introduction ....................................................3
2. Terminology .....................................................3
3. Reference Design ................................................3
4. Control Plane ...................................................5
5. Illustration of the Scale .......................................5
6. Design Options ..................................................6
6.1. Segment Routing Global Block (SRGB) Size ...................6
6.2. Redistribution of Routes for Agg Nodes .....................7
6.3. Sizing and Hierarchy .......................................7
6.4. Local Segments to Hosts/Servers ............................7
6.5. Compressed SRTE Policies ...................................7
7. Deployment Model ................................................8
8. Benefits ........................................................8
8.1. Simplified Operations ......................................8
8.2. Inter-domain SLAs ..........................................8
8.3. Scale ......................................................9
8.4. ECMP .......................................................9
9. IANA Considerations .............................................9
10. Manageability Considerations ...................................9
11. Security Considerations ........................................9
12. Informative References .........................................9
Acknowledgements ..................................................10
Contributors ......................................................10
Authors' Addresses ................................................11
Filsfils, et al. Informational [Page 2]
RFC 8604 Large-Scale Segment Routing June 2019
1. Introduction
This document describes how Segment Routing (SR) can be used to
interconnect millions of endpoints.
2. Terminology
The following terms and abbreviations are used in this document:
Term Definition
-------------------------------------------------------------
Agg Aggregation
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