RFC 9869: Datagram Packetization Layer Path MTU Discovery (DPLPMTUD) for UDP Options
In plain English — editorial summary, not part of the RFC
This document specifies how a UDP Options sender implements Datagram Packetization Layer Path MTU Discovery (DPLPMTUD) as a robust method for Path MTU Discovery (PMTUD). This method uses the UDP Options packetization layer. It allows an application to discover the largest size of datagram that can be sent across a network path. It also provides a way to allow the application to periodically verify the current Maximum Packet Size (MPS) supported by a path and to update this when required.
Document record
- Document ID
- RFC9869
- Published
- October 2025
- Authors
- G. Fairhurst; T. Jones
- Status
- PROPOSED STANDARD
- Stream
- IETF
- Area
- wit
- Pages
- 13
- Also known as
- —
Topics
Related documents
Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.
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- RFC 9297HTTP Datagrams and the Capsule ProtocolCurrent
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About this page
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.
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