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RFC 9986: Meticulous Keyed ISAAC for Bidirectional Forwarding Detection (BFD) Optimized Authentication

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

This document describes a Bidirectional Forwarding Detection (BFD) Optimized Authentication Mode known as Meticulous Keyed ISAAC Authentication. This mode can be used to authenticate some BFD packets with less CPU time cost than using MD5 or SHA-1 with the trade-off of decreased security. This mechanism cannot be used to signal state changes, but it can be used to maintain a session in the Up state.

Document record

Document ID
RFC9986
Published
June 2026
Authors
A. DeKok; M. Jethanandani; S. Agarwal; A. Mishra; J. Haas
Status
EXPERIMENTAL
Stream
IETF
Area
rtg
Pages
29
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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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