Re: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-21.txt

Magnus Westerlund <magnus.westerlund@ericsson.com> Tue, 12 May 2020 08:52 UTC

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From: Magnus Westerlund <magnus.westerlund@ericsson.com>
To: "tsvwg@ietf.org" <tsvwg@ietf.org>
CC: "draft-ietf-tsvwg-datagram-plpmtud.all@ietf.org" <draft-ietf-tsvwg-datagram-plpmtud.all@ietf.org>
Thread-Topic: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-21.txt
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Date: Tue, 12 May 2020 08:52:14 +0000
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Subject: Re: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-21.txt
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TSVWG,

This is your last chance to comment on any of the changes that has been 
introduced as a result of the IESG evaluation. I intended to approve this 
document on Friday after 12:00 (CEST). So if you have any issues with the 
changes that has been introduced please comment.

The diff across from -19 to -21 is the following:

https://www.ietf.org/rfcdiff?url1=draft-ietf-tsvwg-datagram-plpmtud-19&url2=draft-ietf-tsvwg-datagram-plpmtud-21

Cheers

Magnus Westerlund



> -----Original Message-----
> From: tsvwg <tsvwg-bounces@ietf.org> On Behalf Of internet-
> drafts@ietf.org
> Sent: den 12 maj 2020 10:41
> To: i-d-announce@ietf.org
> Cc: tsvwg@ietf.org
> Subject: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-21.txt
>
>
> 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-21.txt
> 	Pages           : 48
> 	Date            : 2020-05-12
>
> 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 packet
>    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 functionality for
>    datagram transports that is equivalent to the Packetization Layer
>    PMTUD specification for TCP, specified in RFC 4821.
>
>    This document updates RFC 4821 to specify the PLPMTUD method for
>    datagram PLs.  It also updates RFC 8085 to refer to the method
>    specified in this document instead of the method in RFC 4821 for use
>    with UDP datagrams.  Section 7.3 of RFC 4960 recommends an endpoint
>    apply the techniques in RFC 4821 on a per-destination-address basis.
>    RFC 4960, RFC 6951, and RFC 8261 are updated to recommend that SCTP,
>    SCTP encapsulated in UDP and SCTP encapsulated in DTLS use the method
>    specified in this document instead of the method 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 4960, RFC 4821, RFC
>    8085 and RFC 8261.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-tsvwg-datagram-plpmtud/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-tsvwg-datagram-plpmtud-21
> https://datatracker.ietf.org/doc/html/draft-ietf-tsvwg-datagram-plpmtud-
> 21
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-tsvwg-datagram-plpmtud-21
>
>
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>