Advertisement of Segment Routing Policies Using BGP - Link State

Metadata

Publisher: IETF
Doc Type: Standard
Pages: 52
Abstract: This document describes a mechanism used to collect Segment Routing (SR) Policy information that is locally available in a node and advertise it into BGP - Link State (BGP-LS) updates. Such information can be used by external components for path computation, reoptimization, service placement, network visualization, etc.
Publication Date: 2025-10-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9857
Link: https://doi.org/10.17487/RFC9857
Author(s): Stefano Previdi
Ketan Talaulikar
Jie Dong
Hannes Gredler
Jeff Tantsura
Keyword(s): BGP, BGP-LS, Segment Routing, SRv6, Traffic Engineering

Latest version of IETF RFC 9857

Document Versions — IETF RFC 9857

▶ IETF RFC 9857 (2025-10-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 2328 [Active*]
IETF RFC 3630 [Active*]
IETF RFC 5305 [Active*]
IETF RFC 5329 [Active*]
IETF RFC 5340 [Active*]
IETF RFC 5440 [Active*]
IETF RFC 7471 [Active*]
IETF RFC 8126 [Active*]
IETF RFC 8174 [Active*]
IETF RFC 8402 [Active*]
IETF RFC 8570 [Active*]
IETF RFC 8664 [Active*]
IETF RFC 8697 [Active*]
IETF RFC 8986 [Active*]
IETF RFC 9086 [Active*]
IETF RFC 9256 [Active*]
IETF RFC 9514 [Active*]
IETF RFC 9552 [Active*]
IETF RFC 9843 [Active*]

Bibliographic Reference(s)

10.1109-IEEESTD.2019.8766229 — IEEE754 EXTERNAL
IETF.draft-ietf-idr-bgp-ls-te-path-02 — I-D.ietf-idr-bgp-ls-te-path EXTERNAL
IETF RFC 2702 [Active*]
IETF RFC 4202 [Active*]
IETF RFC 4655 [Active*]
IETF RFC 5065 [Active*]
IETF RFC 6952 [Active*]
IETF RFC 7308 [Active*]
IETF RFC 8231 [Active*]
IETF RFC 8800 [Active*]
IETF RFC 9830 [Active*]
IETF RFC 9831 [Active*]

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/RFC9857.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

IETF RFC 9857, Advertisement of Segment Routing Policies Using BGP - Link State. Available at https://doi.org/10.17487/RFC9857

Snippet:

IETF RFC 9857, Advertisement of Segment Routing Policies Using BGP - Link State. Available at https://doi.org/10.17487/RFC9857

HTML (ISO 690 compliant)

Preview:

IETF RFC 9857, Advertisement of Segment Routing Policies Using BGP - Link State. Available at https://doi.org/10.17487/RFC9857

Snippet:

<span class="citation"><cite>IETF RFC 9857</cite>, Advertisement of Segment Routing Policies Using BGP - Link State. Available at <a href="https://doi.org/10.17487/RFC9857" target="_blank" rel="noopener">https://doi.org/10.17487/RFC9857</a></span>

SMPTE's HTML Pub

Preview:

IETF RFC 9857, Advertisement of Segment Routing Policies Using BGP - Link State
doi: 10.17487/RFC9857
url: https://doi.org/10.17487/RFC9857

Snippet:

<li>
<cite id="bib-rfc9857">IETF RFC 9857</cite>, Advertisement of Segment Routing Policies Using BGP - Link State
<span class="doi">10.17487/RFC9857</span>
</li>

Referenced By

IETF RFC 9862 [Active*]