rfc9816v3.txt   rfc9816.txt 
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Request for Comments: 9816 A. Lindem Request for Comments: 9816 A. Lindem
Category: Informational Arrcus, Inc. Category: Informational Arrcus, Inc.
ISSN: 2070-1721 S. Zandi ISSN: 2070-1721 S. Zandi
G. Dawra G. Dawra
Google Google
J. Dong J. Dong
Huawei Technologies Huawei Technologies
July 2025 July 2025
Usage and Applicability of BGP Link-State Shortest Path First (SPF) Usage and Applicability of BGP Link State (BGP-LS) Shortest Path First
Routing in Data Centers (SPF) Routing in Data Centers
Abstract Abstract
This document discusses the usage and applicability of BGP Link State This document discusses the usage and applicability of BGP Link State
(BGP-LS) Shortest Path First (SPF) extensions in data center networks (BGP-LS) Shortest Path First (SPF) extensions in data center networks
utilizing Clos or Fat Tree topologies. The document is intended to utilizing Clos or Fat Tree topologies. The document is intended to
provide simplified guidance for the deployment of BGP-LS SPF provide simplified guidance for the deployment of BGP-LS SPF
extensions. extensions.
Status of This Memo Status of This Memo
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10. Security Considerations 10. Security Considerations
This document introduces no new security considerations above and This document introduces no new security considerations above and
beyond those already specified in [RFC4271] and [RFC9815]. beyond those already specified in [RFC4271] and [RFC9815].
11. References 11. References
11.1. Normative References 11.1. Normative References
[RFC9815] Patel, K., Lindem, A., Zandi, S., and W. Henderickx, "BGP [RFC9815] Patel, K., Lindem, A., Zandi, S., and W. Henderickx, "BGP
Link-State Shortest Path First (SPF) Routing", RFC 9815, Link State (BGP-LS) Shortest Path First (SPF) Routing",
DOI 10.17487/RFC9815, July 2025, RFC 9815, DOI 10.17487/RFC9815, July 2025,
<https://www.rfc-editor.org/info/rfc9815>. <https://www.rfc-editor.org/info/rfc9815>.
11.2. Informative References 11.2. Informative References
[Clos] Clos, C., "A Study of Non-Blocking Switching Networks", [Clos] Clos, C., "A Study of Non-Blocking Switching Networks",
The Bell System Technical Journal, vol. 32, no. 2, pp. The Bell System Technical Journal, vol. 32, no. 2, pp.
406-424, DOI 10.1002/j.1538-7305.1953.tb01433.x, March 406-424, DOI 10.1002/j.1538-7305.1953.tb01433.x, March
1953, 1953,
<https://doi.org/10.1002/j.1538-7305.1953.tb01433.x>. <https://doi.org/10.1002/j.1538-7305.1953.tb01433.x>.
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