RFC 9268 · EXPERIMENTAL · 2022
SUN · 14 JUN 2026
IPv6 Minimum Path MTU Hop-by-Hop Option
Overview
RFC 9268, “IPv6 Minimum Path MTU Hop-by-Hop Option”, is an Experimental document published in August 2022 by R. Hinden, G. Fairhurst. The canonical text is published by the RFC Editor.
Abstract
This document specifies a new IPv6 Hop-by-Hop Option that is used to record the Minimum Path MTU (PMTU) along the forward path between a source host to a destination host. The recorded value can then be communicated back to the source using the return Path MTU field in the Option.
What “Experimental” means
Describes a specification that is part of a research or development effort, published so the community can gain experience with it.
Read this RFC
The canonical text of RFC 9268 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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