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IPv6 Minimum Path MTU Hop-by-Hop Option

Document Type Replaced Internet-Draft (6man WG)
Expired & archived
Authors Bob Hinden , Gorry Fairhurst
Last updated 2019-08-08 (Latest revision 2019-07-05)
Replaced by draft-ietf-6man-mtu-option
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-6man-mtu-option
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document specifies a new Hop-by-Hop IPv6 option that is used to record the minimum Path MTU along the forward path between a source to a destination host. This collects a minimum recorded MTU along the path to the destination. The value can then be communicated back to the source using the return Path MTU field in the option. This Hop-by-Hop option is intended to be used in environments like Data Centers and on paths between Data Centers, to allow them to better take advantage of paths able to support a large Path MTU.


Bob Hinden
Gorry Fairhurst

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