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RFC 9857: Advertisement of Segment Routing Policies Using BGP - Link State

In plain English — editorial summary, not part of the RFC

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.

Document record

Document ID
RFC9857
Published
October 2025
Authors
S. Previdi; K. Talaulikar; J. Dong; H. Gredler; J. Tantsura
Status
PROPOSED STANDARD
Stream
IETF
Area
rtg
Pages
52
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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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