Re: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-09.txt

Tom Jones <tj@enoti.me> Mon, 04 November 2019 19:16 UTC

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Date: Mon, 4 Nov 2019 19:15:58 +0000
From: Tom Jones <tj@enoti.me>
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Subject: Re: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-09.txt
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On Mon, Nov 04, 2019 at 10:52:07AM -0800, internet-drafts@ietf.org wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Transport Area Working Group WG of the IETF.
> 
>         Title           : Packetization Layer Path MTU Discovery for Datagram Transports
>         Authors         : Godred Fairhurst
>                           Tom Jones
>                           Michael Tuexen
>                           Irene Ruengeler
>                           Timo Voelker
> 	Filename        : draft-ietf-tsvwg-datagram-plpmtud-09.txt
> 	Pages           : 42
> 	Date            : 2019-11-04
> 
> Abstract:
>    This document describes a robust method for Path MTU Discovery
>    (PMTUD) for datagram Packetization Layers (PLs).  It describes an
>    extension to RFC 1191 and RFC 8201, which specifies ICMP-based Path
>    MTU Discovery for IPv4 and IPv6.  The method allows a PL, or a
>    datagram application that uses a PL, to discover whether a network
>    path can support the current size of datagram.  This can be used to
>    detect and reduce the message size when a sender encounters a network
>    black hole (where packets are discarded).  The method can probe a
>    network path with progressively larger packets to discover whether
>    the maximum packet size can be increased.  This allows a sender to
>    determine an appropriate packet size, providing functionally for
>    datagram transports that is equivalent to the Packetization Layer
>    PMTUD specification for TCP, specified in RFC 4821.
> 
>    The document also provides implementation notes for incorporating
>    Datagram PMTUD into IETF datagram transports or applications that use
>    datagram transports.
> 
>    When published, this specification updates RFC 4821.
> 
> 

Hi

We have posted an update to DPLPMTUD, this update is mostly minor
changes, the highlights are:

- Remove final mention of UDP Options
- Add Initial Connectivity sections to each PL
- Add to disable outgoing pmtu enforcement of packets

Finally you can now see the glorious SVG diagrams on the ietf draft web
pages.

https://www.ietf.org/id/draft-ietf-tsvwg-datagram-plpmtud-09.html

- Tom