Path MTU Discovery

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Last updated 2003-06-26
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes Path MTU Discovery for the Internet. It is largely derived from RFC 1191 and RFC 1981, which describe ICMP based Path MTU Discovery for IP versions 4 and 6, plus a robust new algorithm.


Matt Mathis (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)