Re: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-22.txt

Gorry Fairhurst <gorry@erg.abdn.ac.uk> Wed, 10 June 2020 13:40 UTC

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To: Magnus Westerlund <magnus.westerlund=40ericsson.com@dmarc.ietf.org>, "tsvwg@ietf.org" <tsvwg@ietf.org>
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From: Gorry Fairhurst <gorry@erg.abdn.ac.uk>
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Date: Wed, 10 Jun 2020 14:40:27 +0100
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Subject: Re: [tsvwg] I-D Action: draft-ietf-tsvwg-datagram-plpmtud-22.txt
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Thank you Magnus,

I think the extra effort to integrate the text into QUIC has resulted in 
a really good result and much better description of how to realise 
DPLPMTID within QUIC. I'd agree the ID is now ready to go ahead.

Gorry

On 10/06/2020 13:16, Magnus Westerlund wrote:
> WG,
>
> I now intended to approve this document as the QUIC related text has been moved
> to the QUIC specifications and this normative descripition has been removed from
> this document.
>
> Cheers
>
> Magnus Westerlund
>
> On Wed, 2020-06-10 at 04:42 -0700, 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-22.txt
>> 	Pages           : 47
>> 	Date            : 2020-06-10
>>
>> 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-22
>> https://datatracker.ietf.org/doc/html/draft-ietf-tsvwg-datagram-plpmtud-22
>>
>> A diff from the previous version is available at:
>> https://www.ietf.org/rfcdiff?url2=draft-ietf-tsvwg-datagram-plpmtud-22
>>
>>
>> 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/
>>
>>
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