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UpdatedPROPOSED STANDARDIETF stream

RFC 4821: Packetization Layer Path MTU Discovery

Still current, but amended. Parts of this document are changed or extended by RFC 8899. Read both.

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

This document describes a robust method for Path MTU Discovery (PMTUD) that relies on TCP or some other Packetization Layer to probe an Internet path with progressively larger packets. This method is described as an extension to RFC 1191 and RFC 1981, which specify ICMP-based Path MTU Discovery for IP versions 4 and 6, respectively. [STANDARDS-TRACK]

Document record

Document ID
RFC4821
Published
March 2007
Authors
M. Mathis; J. Heffner
Status
PROPOSED STANDARD
Stream
IETF
Area
tsv
Pages
32
Also known as
—
Updated by:
RFC 8899

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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.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/4821-packetization-layer-path-mtu-discovery