rfc9696v2.txt   rfc9696.txt 
Internet Engineering Task Force (IETF) Y. Wei, Ed. Internet Engineering Task Force (IETF) Y. Wei, Ed.
Request for Comments: 9696 Z. Zhang Request for Comments: 9696 Z. Zhang
Category: Informational ZTE Corporation Category: Informational ZTE Corporation
ISSN: 2070-1721 D. Afanasiev ISSN: 2070-1721 D. Afanasiev
Yandex Yandex
P. Thubert P. Thubert
Individual Individual
T. Przygienda T. Przygienda
Juniper Networks Juniper Networks
December 2024 March 2025
Routing in Fat Trees (RIFT) Applicability and Operational Considerations Routing in Fat Trees (RIFT) Applicability and Operational Considerations
Abstract Abstract
This document discusses the properties, applicability, and This document discusses the properties, applicability, and
operational considerations of Routing in Fat Trees (RIFT) in operational considerations of Routing in Fat Trees (RIFT) in
different network scenarios with the intention of providing a rough different network scenarios with the intention of providing a rough
guide on how RIFT can be deployed to simplify routing operations in guide on how RIFT can be deployed to simplify routing operations in
Clos topologies and their variations. Clos topologies and their variations.
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Internet Engineering Steering Group (IESG). Not all documents Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are candidates for any level of Internet approved by the IESG are candidates for any level of Internet
Standard; see Section 2 of RFC 7841. Standard; see Section 2 of RFC 7841.
Information about the current status of this document, any errata, Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc9696. https://www.rfc-editor.org/info/rfc9696.
Copyright Notice Copyright Notice
Copyright (c) 2024 IETF Trust and the persons identified as the Copyright (c) 2025 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Revised BSD License text as described in Section 4.e of the include Revised BSD License text as described in Section 4.e of the
Trust Legal Provisions and are provided without warranty as described Trust Legal Provisions and are provided without warranty as described
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<https://www.rfc-editor.org/info/rfc8655>. <https://www.rfc-editor.org/info/rfc8655>.
[RFC8950] Litkowski, S., Agrawal, S., Ananthamurthy, K., and K. [RFC8950] Litkowski, S., Agrawal, S., Ananthamurthy, K., and K.
Patel, "Advertising IPv4 Network Layer Reachability Patel, "Advertising IPv4 Network Layer Reachability
Information (NLRI) with an IPv6 Next Hop", RFC 8950, Information (NLRI) with an IPv6 Next Hop", RFC 8950,
DOI 10.17487/RFC8950, November 2020, DOI 10.17487/RFC8950, November 2020,
<https://www.rfc-editor.org/info/rfc8950>. <https://www.rfc-editor.org/info/rfc8950>.
[RFC9692] Przygienda, T., Ed., Head, J., Ed., Sharma, A., Thubert, [RFC9692] Przygienda, T., Ed., Head, J., Ed., Sharma, A., Thubert,
P., Rijsman, B., and D. Afanasiev, "RIFT: Routing in Fat P., Rijsman, B., and D. Afanasiev, "RIFT: Routing in Fat
Trees", RFC 9692, DOI 10.17487/RFC9692, December 2024, Trees", RFC 9692, DOI 10.17487/RFC9692, March 2025,
<https://www.rfc-editor.org/info/rfc9692>. <https://www.rfc-editor.org/info/rfc9692>.
[TR-384] Broadband Forum Technical Report, "TR-384: Cloud Central [TR-384] Broadband Forum Technical Report, "TR-384: Cloud Central
Office Reference Architectural Framework", TR-384, Issue Office Reference Architectural Framework", TR-384, Issue
1, January 2018, 1, January 2018,
<https://www.broadband-forum.org/pdfs/tr-384-1-0-0.pdf>. <https://www.broadband-forum.org/pdfs/tr-384-1-0-0.pdf>.
8.2. Informative References 8.2. Informative References
[CLOS] Yuan, X., "On Nonblocking Folded-Clos Networks in Computer [CLOS] Yuan, X., "On Nonblocking Folded-Clos Networks in Computer
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