Integration of the Network Service Header (NSH) and Segment Routing for Service Function Chaining (SFC)

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Publisher: IETF
Doc Type: Standard
Pages: 17
Abstract: This document describes the integration of the Network Service Header (NSH) and Segment Routing (SR), as well as encapsulation details, to efficiently support Service Function Chaining (SFC) while maintaining separation of the service and transport planes as originally intended by the SFC architecture. Combining these technologies allows SR to be used for steering packets between Service Function Forwarders (SFFs) along a given Service Function Path (SFP), whereas the NSH is responsible for maintaining the integrity of the service plane, the SFC instance context, and any associated metadata. This integration demonstrates that the NSH and SR can work cooperatively and provide a network operator with the flexibility to use whichever transport technology makes sense in specific areas of their network infrastructure while still maintaining an end-to-end service plane using the NSH.
Publication Date: 2023-11-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9491
Link: https://doi.org/10.17487/RFC9491
Author(s): Jim Guichard
Jeff Tantsura
Keyword(s): NSH, Segment Routing, SRv6, SFC

Latest version of IETF RFC 9491

Document Versions — IETF RFC 9491

▶ IETF RFC 9491 (2023-11-01)

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Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 3031 [Active*]
IETF RFC 8174 [Active*]
IETF RFC 8200 [Active*]
IETF RFC 8300 [Active*]
IETF RFC 8402 [Active*]
IETF RFC 8660 [Active*]
IETF RFC 8663 [Active*]
IETF RFC 8665 [Active*]
IETF RFC 8667 [Active*]
IETF RFC 8754 [Active*]

Bibliographic Reference(s)

IETF.draft-ietf-spring-sr-service-programming-08 — I-D.ietf-spring-sr-service-programming EXTERNAL
IETF RFC 7498 [Active*]
IETF RFC 7665 [Active*]
IETF RFC 8596 [Active*]

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IETF RFC 9491, Integration of the Network Service Header (NSH) and Segment Routing for Service Function Chaining (SFC). Available at https://doi.org/10.17487/RFC9491

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IETF RFC 9491, Integration of the Network Service Header (NSH) and Segment Routing for Service Function Chaining (SFC). Available at https://doi.org/10.17487/RFC9491

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IETF RFC 9491, Integration of the Network Service Header (NSH) and Segment Routing for Service Function Chaining (SFC). Available at https://doi.org/10.17487/RFC9491

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<span class="citation"><cite>IETF RFC 9491</cite>, Integration of the Network Service Header (NSH) and Segment Routing for Service Function Chaining (SFC). Available at <a href="https://doi.org/10.17487/RFC9491" target="_blank" rel="noopener">https://doi.org/10.17487/RFC9491</a></span>

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IETF RFC 9491, Integration of the Network Service Header (NSH) and Segment Routing for Service Function Chaining (SFC)
doi: 10.17487/RFC9491
url: https://doi.org/10.17487/RFC9491

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<li>
<cite id="bib-rfc9491">IETF RFC 9491</cite>, Integration of the Network Service Header (NSH) and Segment Routing for Service Function Chaining (SFC)
<span class="doi">10.17487/RFC9491</span>
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Referenced By

IETF RFC 9543 [Active*]