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RFC 9355
Title: OSPF Bidirectional Forwarding Detection (BFD)
Strict-Mode
Author: K. Talaulikar, Ed.,
P. Psenak,
A. Fu,
M. Rajesh
Status: Standards Track
Stream: IETF
Date: February 2023
Mailbox: [email protected],
[email protected],
[email protected],
[email protected]
Pages: 10
Updates: RFC 2328
I-D Tag: draft-ietf-lsr-ospf-bfd-strict-mode-10.txt
URL: https://www.rfc-editor.org/info/rfc9355
DOI: 10.17487/RFC9355
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.
This document is a product of the Link State Routing Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
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