Bidirectional Forwarding Detection Encapsulated in Large Packets
RFC 9764, “Bidirectional Forwarding Detection Encapsulated in Large Packets”, is a Proposed Standard document published in April 2025 by J. Haas, A. Fu. The canonical text is published by the RFC Editor.
Abstract
The Bidirectional Forwarding Detection (BFD) protocol is commonly used to verify connectivity between two systems. BFD packets are typically very small. It is desirable in some circumstances to know not only that the path between two systems is reachable, but also that it is capable of carrying a payload of a particular size. This document specifies how to implement such a mechanism using BFD in Asynchronous mode.
YANG modules for managing this mechanism are also defined in this document. These YANG modules augment the existing BFD YANG modules defined in RFC 9314. The YANG modules in this document conform to the Network Management Datastore Architecture (NMDA) (RFC 8342).
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9764 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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