RFC 8201 · INTERNET STANDARD · 2017
WED · 29 JUL 2026
Path MTU Discovery for IP version 6
Overview
RFC 8201, “Path MTU Discovery for IP version 6”, is an Internet Standard document published in July 2017 by J. McCann, S. Deering, J. Mogul, R. Hinden. It obsoletes RFC 1981. The canonical text is published by the RFC Editor.
Abstract
This document describes Path MTU Discovery (PMTUD) for IP version 6. It is largely derived from RFC 1191, which describes Path MTU Discovery for IP version 4. It obsoletes RFC 1981.
What “Internet Standard” means
A mature, widely-implemented specification that has completed the full IETF standards process — the highest maturity level on the standards track.
Read this RFC
The canonical text of RFC 8201 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2017
- RFC 8200 Internet Protocol, Version 6 Specification
- RFC 8202 IS-IS Multi-Instance
- RFC 8199 YANG Module Classification
- RFC 8203 BGP Administrative Shutdown Communication
- RFC 8198 Aggressive Use of DNSSEC-Validated Cache
- RFC 8204 Benchmarking Virtual Switches in the Open Platform for NFV
- RFC 8197 A SIP Response Code for Unwanted Calls
- RFC 8205 BGPsec Protocol Specification