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RFC 9355: OSPF Bidirectional Forwarding Detection (BFD) Strict-Mode

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

This document specifies the extensions to OSPF that enable an OSPF router to signal the requirement for a Bidirectional Forwarding Detection (BFD) session prior to adjacency formation. Link-Local Signaling (LLS) is used to advertise the requirement for strict-mode BFD session establishment for an OSPF adjacency. If both OSPF neighbors advertise BFD strict-mode, adjacency formation will be blocked until a BFD session has been successfully established. This document updates RFC 2328 by augmenting the OSPF neighbor state machine with a check for BFD session up before progression from Init to 2-Way state when operating in OSPF BFD strict-mode.

Document record

Document ID
RFC9355
Published
February 2023
Authors
K. Talaulikar; P. Psenak; A. Fu; M. Rajesh
Status
PROPOSED STANDARD
Stream
IETF
Area
rtg
Pages
10
Also known as
—
Updates:
RFC 2328

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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.

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