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From: Aaron Falk <falk-ietf@dgftech.com>
Date: Mon, 18 Aug 2014 20:37:37 -0400
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Cc: Spencer Dawkins <spencerdawkins.ietf@gmail.com>
Subject: [Taps] TAPS charter rev 20140818
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Hi Folks-

We received a bit more charter input from the IAB and I've incorporated it
into the draft below.  Diffs against the last rev and the version submitted
for IETF comment are also attached (as usual).  The IESG will be taking up
approval of the TAPS working group at their telechat on August 28 so
comments, including support, are appreciated.

Regards,

--aaron

------

Last updated 2014-08-18


Transport Services (taps)

The vast majority of Internet applications make use of the Transport
Services provided by TCP (a reliable, in-order stream protocol) or UDP (an
unreliable datagram protocol). We use the term "Transport Service" to mean
an end-to-end facility provided by the transport layer that can only be
correctly provided with information from the application. This information
may be provided at design time, compile time, or run time.  Additionally,
it may include guidance from the application on whether the facility in
question is required or simply a preference by the application. Four
examples of Transport Services are reliable delivery, no guarantee of order
preservation, content privacy to in-path devices, and minimal latency.

Other transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and
UDP-Lite and the LEDBAT congestion control mechanism extend the set of
available Transport Services beyond those provided to applications by TCP
and UDP. For example, SCTP provides potentially faster (than TCP) reliable
delivery for applications that can accept blocks of data out of order, and
LEDBAT provides low-priority "scavenger" communication.

Application programmers face difficulty when they use protocols other than
TCP or UDP. Most network stacks ship with only TCP and UDP as transport
protocols.  Many firewalls only pass TCP and UDP and some only support HTTP
over TCP. As a result, using other transport protocols or building a new
protocol over raw sockets, risks having an application not work in many
environments. Applications, therefore, must always be able to fall back to
TCP or UDP, or even HTTP in many cases, and once the application programmer
has committed to making an application work on TCP or UDP or HTTP, there is
little incentive to try other transport protocols before falling back.
Further, different protocols can provide the same services in different
ways. Layering decisions must be made (for example, whether a protocol is
used natively or tunneled through UDP).

Because of these complications, programmers often resort to either using
TCP or HTTP, or implementing their own customized "transport services" over
UDP. When application developers re-implement transport features already
available elsewhere, they open the door to problems that simply using TCP
would have avoided, and ensure that the applications can't benefit from
other transport protocols as they become available.

Because even TCP and UDP are not guaranteed to work in all environments
today, some programmers simply give up on using TCP or UDP directly,
relying instead on "HTTP as a Substrate". BCP 56 identified many issues
with this strategy, but assuming that if "any protocol is available on a
given network path and on the hosts that will be communicating, that
protocol will be HTTP" is a reasonable strategy for today's Internet. The
IESG has agreed with this viewpoint enough to publish the WebSocket
protocol on the standards track.

The goal of the TAPS working group is to help application and network stack
programmers by describing an (abstract) interface for applications to make
use of Transport Services. The Working Group deliverables emphasize
defining Transport Services that are important to applications followed by
experimental mechanisms to a) determine if the protocols to provide the
requested services are available on the end points and supported along the
path in the network and b) fall back, i.e., select alternate, possibly
less-preferred, protocols when desired protocols are not available. The
Working Group will not define a richer set of Transport Services for
applications, although the TAPS deliverables could inform proposals for
future chartered work on Transport Services.

The Working Group will:

1) Define a set of Transport Services, prioritizing those provided by
existing IETF protocols and congestion control mechanisms. As a starting
point, the working group will consider services used between two endpoints.

2) Note that not all capabilities of IETF Transport protocols need to be
exposed as Transport Services. This document will recommend the minimal set
of Transport Services for inclusion in the abstract API. The resulting
document will also provide guidance on making a choice among available
mechanisms and protocols to obtain a certain Transport Service.

3) Specify experimental support mechanisms to provide the Transport
Services identified in work item 2. This document will explain how to
select and engage an appropriate protocol and how to discover which
protocols are available for a given connection. Further, it will provide a
basis for incremental deployment. The associated milestone will be
scheduled and work on this document will begin when the TAPS Transport
Services have been specified.

The following topics are out of scope for this Working Group:

- Signaling-based Quality-of-Service (QoS) mechanisms

- Definition of new encapsulations and tunneling mechanisms

- Extension, modification, or creation of existing IETF transport protocols

- Language-specific APIs

TAPS is not chartered to perform detailed analysis of the security aspects
of transport protocols, but TAPS is being chartered almost simultaneously
with TCPINC, which is developing the TCP extensions to provide
unauthenticated encryption and integrity protection of TCP streams, and
TAPS will work with TCPINC to ensure that TAPS will be able to accommodate
the protocol extensions that TCPINC defines.

Milestones:

M9: Submit to the IESG an Informational document defining a set of services
provided by IETF transport protocols and congestion control mechanisms.
M15: Submit to the IESG an Informational document recommending a minimal
set of Transport Services that end systems should support.
M18: Recharter or close.

--001a11c26460f85e130500f0b25e
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">Hi Folks-<div>=
<br></div><div>We received a bit more charter input from the IAB and I&#39;=
ve incorporated it into the draft below. =C2=A0Diffs against the last rev a=
nd the version submitted for IETF comment are also attached (as usual). =C2=
=A0The IESG will be taking up approval of the TAPS working group at their t=
elechat on August 28 so comments, including support, are appreciated.</div>


<div><br></div><div>Regards,</div><div><br></div><div>--aaron</div><div><br=
></div><div>------</div><div><br></div><div><div><font face=3D"courier new,=
 monospace">Last updated 2014-08-18</font></div><div><font face=3D"courier =
new, monospace"><br>


</font></div><div><font face=3D"courier new, monospace"><br></font></div><d=
iv><font face=3D"courier new, monospace">Transport Services (taps)=C2=A0</f=
ont></div><div><font face=3D"courier new, monospace"><br></font></div><div>=
<font face=3D"courier new, monospace">The vast majority of Internet applica=
tions make use of the Transport Services provided by TCP (a reliable, in-or=
der stream protocol) or UDP (an unreliable datagram protocol). We use the t=
erm &quot;Transport Service&quot; to mean an end-to-end facility provided b=
y the transport layer that can only be correctly provided with information =
from the application. This information may be provided at design time, comp=
ile time, or run time. =C2=A0Additionally, it may include guidance from the=
 application on whether the facility in question is required or simply a pr=
eference by the application. Four examples of Transport Services are reliab=
le delivery, no guarantee of order preservation, content privacy to in-path=
 devices, and minimal latency.</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">Other transport protocols such as SCTP, DCCP, W=
ebSockets, MPTCP, and UDP-Lite and the LEDBAT congestion control mechanism =
extend the set of available Transport Services beyond those provided to app=
lications by TCP and UDP. For example, SCTP provides potentially faster (th=
an TCP) reliable delivery for applications that can accept blocks of data o=
ut of order, and LEDBAT provides low-priority &quot;scavenger&quot; communi=
cation.=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">Application programmers face difficulty when th=
ey use protocols other than TCP or UDP. Most network stacks ship with only =
TCP and UDP as transport protocols. =C2=A0Many firewalls only pass TCP and =
UDP and some only support HTTP over TCP. As a result, using other transport=
 protocols or building a new protocol over raw sockets, risks having an app=
lication not work in many environments. Applications, therefore, must alway=
s be able to fall back to TCP or UDP, or even HTTP in many cases, and once =
the application programmer has committed to making an application work on T=
CP or UDP or HTTP, there is little incentive to try other transport protoco=
ls before falling back. Further, different protocols can provide the same s=
ervices in different ways. Layering decisions must be made (for example, wh=
ether a protocol is used natively or tunneled through UDP).=C2=A0</font></d=
iv>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">Because of these complications, programmers oft=
en resort to either using TCP or HTTP, or implementing their own customized=
 &quot;transport services&quot; over UDP. When application developers re-im=
plement transport features already available elsewhere, they open the door =
to problems that simply using TCP would have avoided, and ensure that the a=
pplications can&#39;t benefit from other transport protocols as they become=
 available.=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">Because even TCP and UDP are not guaranteed to =
work in all environments today, some programmers simply give up on using TC=
P or UDP directly, relying instead on &quot;HTTP as a Substrate&quot;. BCP =
56 identified many issues with this strategy, but assuming that if &quot;an=
y protocol is available on a given network path and on the hosts that will =
be communicating, that protocol will be HTTP&quot; is a reasonable strategy=
 for today&#39;s Internet. The IESG has agreed with this viewpoint enough t=
o publish the WebSocket protocol on the standards track.=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">The goal of the TAPS working group is to help a=
pplication and network stack programmers by describing an (abstract) interf=
ace for applications to make use of Transport Services. The Working Group d=
eliverables emphasize defining Transport Services that are important to app=
lications followed by experimental mechanisms to a) determine if the protoc=
ols to provide the requested services are available on the end points and s=
upported along the path in the network and b) fall back, i.e., select alter=
nate, possibly less-preferred, protocols when desired protocols are not ava=
ilable. The Working Group will not define a richer set of Transport Service=
s for applications, although the TAPS deliverables could inform proposals f=
or future chartered work on Transport Services.=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">The Working Group will:</font></div><div><font =
face=3D"courier new, monospace"><br></font></div><div><font face=3D"courier=
 new, monospace">1) Define a set of Transport Services, prioritizing those =
provided by existing IETF protocols and congestion control mechanisms. As a=
 starting point, the working group will consider services used between two =
endpoints.</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">2) Note that not all capabilities of IETF Trans=
port protocols need to be exposed as Transport Services. This document will=
 recommend the minimal set of Transport Services for inclusion in the abstr=
act API. The resulting document will also provide guidance on making a choi=
ce among available mechanisms and protocols to obtain a certain Transport S=
ervice.=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">3) Specify experimental support mechanisms to p=
rovide the Transport Services identified in work item 2. This document will=
 explain how to select and engage an appropriate protocol and how to discov=
er which protocols are available for a given connection. Further, it will p=
rovide a basis for incremental deployment. The associated milestone will be=
 scheduled and work on this document will begin when the TAPS Transport Ser=
vices have been specified.=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">The following topics are out of scope for this =
Working Group:=C2=A0</font></div><div><font face=3D"courier new, monospace"=
><br></font></div>


<div><font face=3D"courier new, monospace">- Signaling-based Quality-of-Ser=
vice (QoS) mechanisms=C2=A0</font></div><div><font face=3D"courier new, mon=
ospace"><br></font></div><div><font face=3D"courier new, monospace">- Defin=
ition of new encapsulations and tunneling mechanisms=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">- Extension, modification, or creation of exist=
ing IETF transport protocols=C2=A0</font></div><div><font face=3D"courier n=
ew, monospace"><br>


</font></div><div><font face=3D"courier new, monospace">- Language-specific=
 APIs=C2=A0</font></div><div><font face=3D"courier new, monospace"><br></fo=
nt></div><div><font face=3D"courier new, monospace">TAPS is not chartered t=
o perform detailed analysis of the security aspects of transport protocols,=
 but TAPS is being chartered almost simultaneously with TCPINC, which is de=
veloping the TCP extensions to provide unauthenticated encryption and integ=
rity protection of TCP streams, and TAPS will work with TCPINC to ensure th=
at TAPS will be able to accommodate the protocol extensions that TCPINC def=
ines.=C2=A0</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font face=
=3D"courier new, monospace">Milestones:=C2=A0</font></div><div><font face=
=3D"courier new, monospace"><br></font></div><div><font face=3D"courier new=
, monospace">M9: Submit to the IESG an Informational document defining a se=
t of services provided by IETF transport protocols and congestion control m=
echanisms.</font></div>


<div><font face=3D"courier new, monospace">M15: Submit to the IESG an Infor=
mational document recommending a minimal set of Transport Services that end=
 systems should support.</font></div><div><font face=3D"courier new, monosp=
ace">M18: Recharter or close.</font></div>


</div><div><br></div></div>
</div><br></div>

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--001a11c26460f85e170500f0b260--


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Subject: Re: [Taps] TAPS charter rev 20140818 - IMPORTANT CHANGE!
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Dear all,

I'm surprised by the number of changes to the charter at this late =
stage. One particular change strikes me as quite significant: the =
following milestone was removed:

***
M18: Submit specification of how the transport services can be provided =
to IESG.
***
...and instead there is now text in the charter saying "The associated =
milestone will be scheduled and work on this document will begin when =
the TAPS Transport Services have been specified".

What's the point of this? Is it a concern about the time line? Milestone =
dates can be changed, if they must, but I think it's important that the =
charter contains the milestone, as a dedication to actually develop a =
workable solution, not just a list of things. The way it stands now, all =
the group produces is a long list and a shorter list. Not what most =
members of the group here wanted, I think. I object to this removal.

Cheers,
Michael



On 19. aug. 2014, at 02:37, Aaron Falk wrote:

> Hi Folks-
>=20
> We received a bit more charter input from the IAB and I've =
incorporated it into the draft below.  Diffs against the last rev and =
the version submitted for IETF comment are also attached (as usual).  =
The IESG will be taking up approval of the TAPS working group at their =
telechat on August 28 so comments, including support, are appreciated.
>=20
> Regards,
>=20
> --aaron
>=20
> ------
>=20
> Last updated 2014-08-18
>=20
>=20
> Transport Services (taps)=20
>=20
> The vast majority of Internet applications make use of the Transport =
Services provided by TCP (a reliable, in-order stream protocol) or UDP =
(an unreliable datagram protocol). We use the term "Transport Service" =
to mean an end-to-end facility provided by the transport layer that can =
only be correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time.  =
Additionally, it may include guidance from the application on whether =
the facility in question is required or simply a preference by the =
application. Four examples of Transport Services are reliable delivery, =
no guarantee of order preservation, content privacy to in-path devices, =
and minimal latency.
>=20
> Other transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and =
UDP-Lite and the LEDBAT congestion control mechanism extend the set of =
available Transport Services beyond those provided to applications by =
TCP and UDP. For example, SCTP provides potentially faster (than TCP) =
reliable delivery for applications that can accept blocks of data out of =
order, and LEDBAT provides low-priority "scavenger" communication.=20
>=20
> Application programmers face difficulty when they use protocols other =
than TCP or UDP. Most network stacks ship with only TCP and UDP as =
transport protocols.  Many firewalls only pass TCP and UDP and some only =
support HTTP over TCP. As a result, using other transport protocols or =
building a new protocol over raw sockets, risks having an application =
not work in many environments. Applications, therefore, must always be =
able to fall back to TCP or UDP, or even HTTP in many cases, and once =
the application programmer has committed to making an application work =
on TCP or UDP or HTTP, there is little incentive to try other transport =
protocols before falling back. Further, different protocols can provide =
the same services in different ways. Layering decisions must be made =
(for example, whether a protocol is used natively or tunneled through =
UDP).=20
>=20
> Because of these complications, programmers often resort to either =
using TCP or HTTP, or implementing their own customized "transport =
services" over UDP. When application developers re-implement transport =
features already available elsewhere, they open the door to problems =
that simply using TCP would have avoided, and ensure that the =
applications can't benefit from other transport protocols as they become =
available.=20
>=20
> Because even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track.=20
>=20
> The goal of the TAPS working group is to help application and network =
stack programmers by describing an (abstract) interface for applications =
to make use of Transport Services. The Working Group deliverables =
emphasize defining Transport Services that are important to applications =
followed by experimental mechanisms to a) determine if the protocols to =
provide the requested services are available on the end points and =
supported along the path in the network and b) fall back, i.e., select =
alternate, possibly less-preferred, protocols when desired protocols are =
not available. The Working Group will not define a richer set of =
Transport Services for applications, although the TAPS deliverables =
could inform proposals for future chartered work on Transport Services.=20=

>=20
> The Working Group will:
>=20
> 1) Define a set of Transport Services, prioritizing those provided by =
existing IETF protocols and congestion control mechanisms. As a starting =
point, the working group will consider services used between two =
endpoints.
>=20
> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20
>=20
> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20
>=20
> The following topics are out of scope for this Working Group:=20
>=20
> - Signaling-based Quality-of-Service (QoS) mechanisms=20
>=20
> - Definition of new encapsulations and tunneling mechanisms=20
>=20
> - Extension, modification, or creation of existing IETF transport =
protocols=20
>=20
> - Language-specific APIs=20
>=20
> TAPS is not chartered to perform detailed analysis of the security =
aspects of transport protocols, but TAPS is being chartered almost =
simultaneously with TCPINC, which is developing the TCP extensions to =
provide unauthenticated encryption and integrity protection of TCP =
streams, and TAPS will work with TCPINC to ensure that TAPS will be able =
to accommodate the protocol extensions that TCPINC defines.=20
>=20
> Milestones:=20
>=20
> M9: Submit to the IESG an Informational document defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
> M15: Submit to the IESG an Informational document recommending a =
minimal set of Transport Services that end systems should support.
> M18: Recharter or close.
>=20
>=20
> =
<charter-diff-20140717-20140818.pdf><charter-diff-20140726-20140818.pdf>__=
_____________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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	charset=us-ascii

<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear =
all,<div><br></div><div>I'm surprised by the number of changes to the =
charter at this late stage.&nbsp;One particular change strikes me as =
quite significant: the following milestone was =
removed:</div><div><br></div><div>***</div><div>M18: Submit =
specification of how the transport services can be provided to =
IESG.</div><div>***</div><div>...and instead there is now text in the =
charter saying "The associated milestone&nbsp;will be scheduled and =
work&nbsp;on this document will begin when the TAPS&nbsp;Transport =
Services have been specified".</div><div><br></div><div>What's the point =
of this? Is it a concern about the time line? Milestone dates can be =
changed, if they must, but I think it's important that the charter =
contains the milestone, as a dedication to actually develop a workable =
solution, not just a list of things. The way it stands now, all the =
group produces is a long list and a shorter list. Not what most members =
of the group here wanted, I think. I object to this =
removal.</div><div><br></div><div>Cheers,</div><div>Michael</div><div><br>=
</div><div><br></div><div><br><div><div>On 19. aug. 2014, at 02:37, =
Aaron Falk wrote:</div><br class=3D"Apple-interchange-newline"><blockquote=
 type=3D"cite"><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"><div dir=3D"ltr"><div class=3D"gmail_quote"><div =
dir=3D"ltr">Hi Folks-<div><br></div><div>We received a bit more charter =
input from the IAB and I've incorporated it into the draft below. =
&nbsp;Diffs against the last rev and the version submitted for IETF =
comment are also attached (as usual). &nbsp;The IESG will be taking up =
approval of the TAPS working group at their telechat on August 28 so =
comments, including support, are appreciated.</div>


=
<div><br></div><div>Regards,</div><div><br></div><div>--aaron</div><div><b=
r></div><div>------</div><div><br></div><div><div><font face=3D"courier =
new, monospace">Last updated 2014-08-18</font></div><div><font =
face=3D"courier new, monospace"><br>


</font></div><div><font face=3D"courier new, =
monospace"><br></font></div><div><font face=3D"courier new, =
monospace">Transport Services (taps)&nbsp;</font></div><div><font =
face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">The vast majority of Internet =
applications make use of the Transport Services provided by TCP (a =
reliable, in-order stream protocol) or UDP (an unreliable datagram =
protocol). We use the term "Transport Service" to mean an end-to-end =
facility provided by the transport layer that can only be correctly =
provided with information from the application. This information may be =
provided at design time, compile time, or run time. &nbsp;Additionally, =
it may include guidance from the application on whether the facility in =
question is required or simply a preference by the application. Four =
examples of Transport Services are reliable delivery, no guarantee of =
order preservation, content privacy to in-path devices, and minimal =
latency.</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">Other transport protocols such as SCTP, =
DCCP, WebSockets, MPTCP, and UDP-Lite and the LEDBAT congestion control =
mechanism extend the set of available Transport Services beyond those =
provided to applications by TCP and UDP. For example, SCTP provides =
potentially faster (than TCP) reliable delivery for applications that =
can accept blocks of data out of order, and LEDBAT provides low-priority =
"scavenger" communication.&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">Application programmers face difficulty =
when they use protocols other than TCP or UDP. Most network stacks ship =
with only TCP and UDP as transport protocols. &nbsp;Many firewalls only =
pass TCP and UDP and some only support HTTP over TCP. As a result, using =
other transport protocols or building a new protocol over raw sockets, =
risks having an application not work in many environments. Applications, =
therefore, must always be able to fall back to TCP or UDP, or even HTTP =
in many cases, and once the application programmer has committed to =
making an application work on TCP or UDP or HTTP, there is little =
incentive to try other transport protocols before falling back. Further, =
different protocols can provide the same services in different ways. =
Layering decisions must be made (for example, whether a protocol is used =
natively or tunneled through UDP).&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">Because of these complications, =
programmers often resort to either using TCP or HTTP, or implementing =
their own customized "transport services" over UDP. When application =
developers re-implement transport features already available elsewhere, =
they open the door to problems that simply using TCP would have avoided, =
and ensure that the applications can't benefit from other transport =
protocols as they become available.&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">Because even TCP and UDP are not =
guaranteed to work in all environments today, some programmers simply =
give up on using TCP or UDP directly, relying instead on "HTTP as a =
Substrate". BCP 56 identified many issues with this strategy, but =
assuming that if "any protocol is available on a given network path and =
on the hosts that will be communicating, that protocol will be HTTP" is =
a reasonable strategy for today's Internet. The IESG has agreed with =
this viewpoint enough to publish the WebSocket protocol on the standards =
track.&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">The goal of the TAPS working group is to =
help application and network stack programmers by describing an =
(abstract) interface for applications to make use of Transport Services. =
The Working Group deliverables emphasize defining Transport Services =
that are important to applications followed by experimental mechanisms =
to a) determine if the protocols to provide the requested services are =
available on the end points and supported along the path in the network =
and b) fall back, i.e., select alternate, possibly less-preferred, =
protocols when desired protocols are not available. The Working Group =
will not define a richer set of Transport Services for applications, =
although the TAPS deliverables could inform proposals for future =
chartered work on Transport Services.&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">The Working Group =
will:</font></div><div><font face=3D"courier new, =
monospace"><br></font></div><div><font face=3D"courier new, =
monospace">1) Define a set of Transport Services, prioritizing those =
provided by existing IETF protocols and congestion control mechanisms. =
As a starting point, the working group will consider services used =
between two endpoints.</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">2) Note that not all capabilities of =
IETF Transport protocols need to be exposed as Transport Services. This =
document will recommend the minimal set of Transport Services for =
inclusion in the abstract API. The resulting document will also provide =
guidance on making a choice among available mechanisms and protocols to =
obtain a certain Transport Service.&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">3) Specify experimental support =
mechanisms to provide the Transport Services identified in work item 2. =
This document will explain how to select and engage an appropriate =
protocol and how to discover which protocols are available for a given =
connection. Further, it will provide a basis for incremental deployment. =
The associated milestone will be scheduled and work on this document =
will begin when the TAPS Transport Services have been =
specified.&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">The following topics are out of scope =
for this Working Group:&nbsp;</font></div><div><font face=3D"courier =
new, monospace"><br></font></div>


<div><font face=3D"courier new, monospace">- Signaling-based =
Quality-of-Service (QoS) mechanisms&nbsp;</font></div><div><font =
face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">- Definition of new encapsulations and =
tunneling mechanisms&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">- Extension, modification, or creation =
of existing IETF transport protocols&nbsp;</font></div><div><font =
face=3D"courier new, monospace"><br>


</font></div><div><font face=3D"courier new, monospace">- =
Language-specific APIs&nbsp;</font></div><div><font face=3D"courier new, =
monospace"><br></font></div><div><font face=3D"courier new, =
monospace">TAPS is not chartered to perform detailed analysis of the =
security aspects of transport protocols, but TAPS is being chartered =
almost simultaneously with TCPINC, which is developing the TCP =
extensions to provide unauthenticated encryption and integrity =
protection of TCP streams, and TAPS will work with TCPINC to ensure that =
TAPS will be able to accommodate the protocol extensions that TCPINC =
defines.&nbsp;</font></div>


<div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">Milestones:&nbsp;</font></div><div><font =
face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">M9: Submit to the IESG an Informational =
document defining a set of services provided by IETF transport protocols =
and congestion control mechanisms.</font></div>


<div><font face=3D"courier new, monospace">M15: Submit to the IESG an =
Informational document recommending a minimal set of Transport Services =
that end systems should support.</font></div><div><font face=3D"courier =
new, monospace">M18: Recharter or close.</font></div>


</div><div><br></div></div>
</div><br></div>
=
<span>&lt;charter-diff-20140717-20140818.pdf&gt;</span><span>&lt;charter-d=
iff-20140726-20140818.pdf&gt;</span>______________________________________=
_________<br>Taps mailing list<br><a =
href=3D"mailto:Taps@ietf.org">Taps@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/taps<br></blockquote></div><br></div></body></html>=

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From: Brian Trammell <ietf@trammell.ch>
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Subject: Re: [Taps] TAPS charter rev 20140818
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Hi Aaron,

Following some (i.e. extensive) hallway discussion in Toronto to =
Thursday, I'd make one following suggested changes to this draft =
charter, inline.

On 19 Aug 2014, at 02:37, Aaron Falk <falk-ietf@dgftech.com> wrote:

> Hi Folks-
>=20
> We received a bit more charter input from the IAB and I've =
incorporated it into the draft below.  Diffs against the last rev and =
the version submitted for IETF comment are also attached (as usual).  =
The IESG will be taking up approval of the TAPS working group at their =
telechat on August 28 so comments, including support, are appreciated.
>=20
> Regards,
>=20
> --aaron
>=20
> ------
>=20
> Last updated 2014-08-18
>=20
>=20
> Transport Services (taps)=20
>=20
> The vast majority of Internet applications make use of the Transport =
Services provided by TCP (a reliable, in-order stream protocol) or UDP =
(an unreliable datagram protocol). We use the term "Transport Service" =
to mean an end-to-end facility provided by the transport layer that can =
only be correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time.  =
Additionally, it may include guidance from the application on whether =
the facility in question is required or simply a preference by the =
application. Four examples of Transport Services are reliable delivery, =
no guarantee of order preservation, content privacy to in-path devices, =
and minimal latency.
>=20
> Other transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and =
UDP-Lite and the LEDBAT congestion control mechanism extend the set of =
available Transport Services beyond those provided to applications by =
TCP and UDP. For example, SCTP provides potentially faster (than TCP) =
reliable delivery for applications that can accept blocks of data out of =
order, and LEDBAT provides low-priority "scavenger" communication.=20
>=20
> Application programmers face difficulty when they use protocols other =
than TCP or UDP. Most network stacks ship with only TCP and UDP as =
transport protocols.  Many firewalls only pass TCP and UDP and some only =
support HTTP over TCP. As a result, using other transport protocols or =
building a new protocol over raw sockets, risks having an application =
not work in many environments. Applications, therefore, must always be =
able to fall back to TCP or UDP, or even HTTP in many cases, and once =
the application programmer has committed to making an application work =
on TCP or UDP or HTTP, there is little incentive to try other transport =
protocols before falling back. Further, different protocols can provide =
the same services in different ways. Layering decisions must be made =
(for example, whether a protocol is used natively or tunneled through =
UDP).=20
>=20
> Because of these complications, programmers often resort to either =
using TCP or HTTP, or implementing their own customized "transport =
services" over UDP. When application developers re-implement transport =
features already available elsewhere, they open the door to problems =
that simply using TCP would have avoided, and ensure that the =
applications can't benefit from other transport protocols as they become =
available.=20
>=20
> Because even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track.=20
>=20
> The goal of the TAPS working group is to help application and network =
stack programmers by describing an (abstract) interface for applications =
to make use of Transport Services. The Working Group deliverables =
emphasize defining Transport Services that are important to applications =
followed by experimental mechanisms to a) determine if the protocols to =
provide the requested services are available on the end points and =
supported along the path in the network and b) fall back, i.e., select =
alternate, possibly less-preferred, protocols when desired protocols are =
not available. The Working Group will not define a richer set of =
Transport Services for applications, although the TAPS deliverables =
could inform proposals for future chartered work on Transport Services.=20=

>=20
> The Working Group will:
>=20
> 1) Define a set of Transport Services, prioritizing those provided by =
existing IETF protocols and congestion control mechanisms. As a starting =
point, the working group will consider services used between two =
endpoints.
>=20
> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20
>=20
> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20
>=20
> The following topics are out of scope for this Working Group:=20
>=20
> - Signaling-based Quality-of-Service (QoS) mechanisms=20
>=20
> - Definition of new encapsulations and tunneling mechanisms=20
>=20
> - Extension, modification, or creation of existing IETF transport =
protocols=20
>=20
> - Language-specific APIs=20
>=20
> TAPS is not chartered to perform detailed analysis of the security =
aspects of transport protocols, but TAPS is being chartered almost =
simultaneously with TCPINC, which is developing the TCP extensions to =
provide unauthenticated encryption and integrity protection of TCP =
streams, and TAPS will work with TCPINC to ensure that TAPS will be able =
to accommodate the protocol extensions that TCPINC defines.=20
>=20
> Milestones:=20
>=20
> M9: Submit to the IESG an Informational document defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
> M15: Submit to the IESG an Informational document recommending a =
minimal set of Transport Services that end systems should support.

Per the third point of the charter, I think we want to add the third =
milestone back, but make clear that the effort is experimental; =
something like:

M18: Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services, and defining an experiment to evaluate =
such interfaces for applicability to common application design patterns =
and incremental deployability

> M18: Recharter or close.

I recommend we keep this milestone as well.

Cheers,

Brian


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From nobody Tue Aug 19 02:35:17 2014
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Subject: [Taps] Another significant detail: status of RFCs
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Hi again, all,

Did you notice that the two still existing milestones that we still have =
left also come with a status now?

Before the London BOF, this bit was:

***
* M7: Submit summary of the services provided by IETF transport =
protocols and congestion control mechanisms as well as requirements of =
common APIs to IESG as Informational
* M10: Submit draft on how transport services are identified to IESG as =
Proposed Standard
* M13: Submit set of services that a transport API should provide to =
IESG as Proposed Standard
***

- before the Toronto BOF, I was told that there's no need for milestones =
to mention the status of documents, and I should just remove that. So we =
had, in the version of the charter that went to IETF open review, even =
after the Toronto BOF:

***
* M9: Submit summary of the services provided by IETF transport =
protocols and congestion control mechanisms to IESG.
* M15: Submit end system transport services to IESG.
* M18: Submit specification of how the transport services can be =
provided to IESG.
***

.... and now, all of a sudden, we have:

***
* M9: Submit to the IESG an Informational document defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
* M15: Submit to the IESG an Informational document recommending a =
minimal set of Transport Services that end systems should support.
***

Minor change? I think not. Might be okay or not - I just don't like this =
happening without people noticing and commenting.


Cheers,
Michael


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Subject: Re: [Taps] TAPS charter rev 20140818
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Hi Brian, thanks getting into this discussion!

In line below:

On 19. aug. 2014, at 11:32, Brian Trammell wrote:

> Hi Aaron,
>=20
> Following some (i.e. extensive) hallway discussion in Toronto to =
Thursday, I'd make one following suggested changes to this draft =
charter, inline.
>=20
> On 19 Aug 2014, at 02:37, Aaron Falk <falk-ietf@dgftech.com> wrote:
>=20
>> Hi Folks-
>>=20
>> We received a bit more charter input from the IAB and I've =
incorporated it into the draft below.  Diffs against the last rev and =
the version submitted for IETF comment are also attached (as usual).  =
The IESG will be taking up approval of the TAPS working group at their =
telechat on August 28 so comments, including support, are appreciated.
>>=20
>> Regards,
>>=20
>> --aaron
>>=20
>> ------
>>=20
>> Last updated 2014-08-18
>>=20
>>=20
>> Transport Services (taps)=20
>>=20
>> The vast majority of Internet applications make use of the Transport =
Services provided by TCP (a reliable, in-order stream protocol) or UDP =
(an unreliable datagram protocol). We use the term "Transport Service" =
to mean an end-to-end facility provided by the transport layer that can =
only be correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time.  =
Additionally, it may include guidance from the application on whether =
the facility in question is required or simply a preference by the =
application. Four examples of Transport Services are reliable delivery, =
no guarantee of order preservation, content privacy to in-path devices, =
and minimal latency.
>>=20
>> Other transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and =
UDP-Lite and the LEDBAT congestion control mechanism extend the set of =
available Transport Services beyond those provided to applications by =
TCP and UDP. For example, SCTP provides potentially faster (than TCP) =
reliable delivery for applications that can accept blocks of data out of =
order, and LEDBAT provides low-priority "scavenger" communication.=20
>>=20
>> Application programmers face difficulty when they use protocols other =
than TCP or UDP. Most network stacks ship with only TCP and UDP as =
transport protocols.  Many firewalls only pass TCP and UDP and some only =
support HTTP over TCP. As a result, using other transport protocols or =
building a new protocol over raw sockets, risks having an application =
not work in many environments. Applications, therefore, must always be =
able to fall back to TCP or UDP, or even HTTP in many cases, and once =
the application programmer has committed to making an application work =
on TCP or UDP or HTTP, there is little incentive to try other transport =
protocols before falling back. Further, different protocols can provide =
the same services in different ways. Layering decisions must be made =
(for example, whether a protocol is used natively or tunneled through =
UDP).=20
>>=20
>> Because of these complications, programmers often resort to either =
using TCP or HTTP, or implementing their own customized "transport =
services" over UDP. When application developers re-implement transport =
features already available elsewhere, they open the door to problems =
that simply using TCP would have avoided, and ensure that the =
applications can't benefit from other transport protocols as they become =
available.=20
>>=20
>> Because even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track.=20
>>=20
>> The goal of the TAPS working group is to help application and network =
stack programmers by describing an (abstract) interface for applications =
to make use of Transport Services. The Working Group deliverables =
emphasize defining Transport Services that are important to applications =
followed by experimental mechanisms to a) determine if the protocols to =
provide the requested services are available on the end points and =
supported along the path in the network and b) fall back, i.e., select =
alternate, possibly less-preferred, protocols when desired protocols are =
not available. The Working Group will not define a richer set of =
Transport Services for applications, although the TAPS deliverables =
could inform proposals for future chartered work on Transport Services.=20=

>>=20
>> The Working Group will:
>>=20
>> 1) Define a set of Transport Services, prioritizing those provided by =
existing IETF protocols and congestion control mechanisms. As a starting =
point, the working group will consider services used between two =
endpoints.
>>=20
>> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20
>>=20
>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20
>>=20
>> The following topics are out of scope for this Working Group:=20
>>=20
>> - Signaling-based Quality-of-Service (QoS) mechanisms=20
>>=20
>> - Definition of new encapsulations and tunneling mechanisms=20
>>=20
>> - Extension, modification, or creation of existing IETF transport =
protocols=20
>>=20
>> - Language-specific APIs=20
>>=20
>> TAPS is not chartered to perform detailed analysis of the security =
aspects of transport protocols, but TAPS is being chartered almost =
simultaneously with TCPINC, which is developing the TCP extensions to =
provide unauthenticated encryption and integrity protection of TCP =
streams, and TAPS will work with TCPINC to ensure that TAPS will be able =
to accommodate the protocol extensions that TCPINC defines.=20
>>=20
>> Milestones:=20
>>=20
>> M9: Submit to the IESG an Informational document defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
>> M15: Submit to the IESG an Informational document recommending a =
minimal set of Transport Services that end systems should support.
>=20
> Per the third point of the charter, I think we want to add the third =
milestone back, but make clear that the effort is experimental; =
something like:
>=20
> M18: Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services, and defining an experiment to evaluate =
such interfaces for applicability to common application design patterns =
and incremental deployability

I think this is a significant change to the wording that we had during =
IETF open review, which was:

M18: Submit specification of how the transport services can be provided =
to IESG.

I'd be fine with the status of this document explicitly being =
Experimental, as it was before, see:
=
https://sites.google.com/site/transportprotocolservices/charter-proposal/c=
harter-before-london
i.e. to change this back to:

M18: Submit Experimental specification of how the transport services can =
be provided to IESG.

...but your wording seems to be an entirely different thing: exploring =
abstract interfaces? defining an experiment to evaluate them for =
applicability to app design patterns? This is really something else. Why =
do you propose such a change at this late stage? Who else wants that, =
and why?


>> M18: Recharter or close.
>=20
> I recommend we keep this milestone as well.

+1. That one wasn't ever debated I think. Fine.


Cheers,
Michael


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<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi =
Brian, thanks getting into this discussion!<div><br></div><div>In line =
below:</div><div><br></div><div><div><div>On 19. aug. 2014, at 11:32, =
Brian Trammell wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div>Hi =
Aaron,<br><br>Following some (i.e. extensive) hallway discussion in =
Toronto to Thursday, I'd make one following suggested changes to this =
draft charter, inline.<br><br>On 19 Aug 2014, at 02:37, Aaron Falk =
&lt;<a href=3D"mailto:falk-ietf@dgftech.com">falk-ietf@dgftech.com</a>&gt;=
 wrote:<br><br><blockquote type=3D"cite">Hi =
Folks-<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">We received a =
bit more charter input from the IAB and I've incorporated it into the =
draft below. &nbsp;Diffs against the last rev and the version submitted =
for IETF comment are also attached (as usual). &nbsp;The IESG will be =
taking up approval of the TAPS working group at their telechat on August =
28 so comments, including support, are =
appreciated.<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">Regards,<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">--aaron<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">------<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">Last updated =
2014-08-18<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">Transport =
Services (taps) <br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">The vast =
majority of Internet applications make use of the Transport Services =
provided by TCP (a reliable, in-order stream protocol) or UDP (an =
unreliable datagram protocol). We use the term "Transport Service" to =
mean an end-to-end facility provided by the transport layer that can =
only be correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time. =
&nbsp;Additionally, it may include guidance from the application on =
whether the facility in question is required or simply a preference by =
the application. Four examples of Transport Services are reliable =
delivery, no guarantee of order preservation, content privacy to in-path =
devices, and minimal latency.<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">Other transport =
protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and the =
LEDBAT congestion control mechanism extend the set of available =
Transport Services beyond those provided to applications by TCP and UDP. =
For example, SCTP provides potentially faster (than TCP) reliable =
delivery for applications that can accept blocks of data out of order, =
and LEDBAT provides low-priority "scavenger" communication. =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">Application programmers face difficulty when they use =
protocols other than TCP or UDP. Most network stacks ship with only TCP =
and UDP as transport protocols. &nbsp;Many firewalls only pass TCP and =
UDP and some only support HTTP over TCP. As a result, using other =
transport protocols or building a new protocol over raw sockets, risks =
having an application not work in many environments. Applications, =
therefore, must always be able to fall back to TCP or UDP, or even HTTP =
in many cases, and once the application programmer has committed to =
making an application work on TCP or UDP or HTTP, there is little =
incentive to try other transport protocols before falling back. Further, =
different protocols can provide the same services in different ways. =
Layering decisions must be made (for example, whether a protocol is used =
natively or tunneled through UDP). <br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">Because of =
these complications, programmers often resort to either using TCP or =
HTTP, or implementing their own customized "transport services" over =
UDP. When application developers re-implement transport features already =
available elsewhere, they open the door to problems that simply using =
TCP would have avoided, and ensure that the applications can't benefit =
from other transport protocols as they become available. =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">Because even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track. =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">The goal of the TAPS working group is to help application =
and network stack programmers by describing an (abstract) interface for =
applications to make use of Transport Services. The Working Group =
deliverables emphasize defining Transport Services that are important to =
applications followed by experimental mechanisms to a) determine if the =
protocols to provide the requested services are available on the end =
points and supported along the path in the network and b) fall back, =
i.e., select alternate, possibly less-preferred, protocols when desired =
protocols are not available. The Working Group will not define a richer =
set of Transport Services for applications, although the TAPS =
deliverables could inform proposals for future chartered work on =
Transport Services. <br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">The Working =
Group will:<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">1) Define a set =
of Transport Services, prioritizing those provided by existing IETF =
protocols and congestion control mechanisms. As a starting point, the =
working group will consider services used between two =
endpoints.<br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">2) Note that =
not all capabilities of IETF Transport protocols need to be exposed as =
Transport Services. This document will recommend the minimal set of =
Transport Services for inclusion in the abstract API. The resulting =
document will also provide guidance on making a choice among available =
mechanisms and protocols to obtain a certain Transport Service. =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">3) Specify experimental support mechanisms to provide the =
Transport Services identified in work item 2. This document will explain =
how to select and engage an appropriate protocol and how to discover =
which protocols are available for a given connection. Further, it will =
provide a basis for incremental deployment. The associated milestone =
will be scheduled and work on this document will begin when the TAPS =
Transport Services have been specified. <br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">The following =
topics are out of scope for this Working Group: =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">- Signaling-based Quality-of-Service (QoS) mechanisms =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">- Definition of new encapsulations and tunneling =
mechanisms <br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">- Extension, =
modification, or creation of existing IETF transport protocols =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">- Language-specific APIs <br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">TAPS is not =
chartered to perform detailed analysis of the security aspects of =
transport protocols, but TAPS is being chartered almost simultaneously =
with TCPINC, which is developing the TCP extensions to provide =
unauthenticated encryption and integrity protection of TCP streams, and =
TAPS will work with TCPINC to ensure that TAPS will be able to =
accommodate the protocol extensions that TCPINC defines. =
<br></blockquote><blockquote type=3D"cite"><br></blockquote><blockquote =
type=3D"cite">Milestones: <br></blockquote><blockquote =
type=3D"cite"><br></blockquote><blockquote type=3D"cite">M9: Submit to =
the IESG an Informational document defining a set of services provided =
by IETF transport protocols and congestion control =
mechanisms.<br></blockquote><blockquote type=3D"cite">M15: Submit to the =
IESG an Informational document recommending a minimal set of Transport =
Services that end systems should support.<br></blockquote><br>Per the =
third point of the charter, I think we want to add the third milestone =
back, but make clear that the effort is experimental; something =
like:<br><br>M18: Submit to the IESG an Experimental document exploring =
abstract interfaces to Transport Services, and defining an experiment to =
evaluate such interfaces for applicability to common application design =
patterns and incremental =
deployability<br></div></blockquote><div><br></div><div>I think this is =
a significant change to the wording that we had during IETF open review, =
which was:</div><div><br></div><div>M18: Submit specification of how the =
transport services can be provided to IESG.</div><div><br></div><div>I'd =
be fine with the status of this document explicitly being Experimental, =
as it was before, see:</div><div><a =
href=3D"https://sites.google.com/site/transportprotocolservices/charter-pr=
oposal/charter-before-london">https://sites.google.com/site/transportproto=
colservices/charter-proposal/charter-before-london</a></div><div>i.e. to =
change this back to:</div><div><br></div><div>M18: Submit Experimental =
specification of how the transport services can be provided to =
IESG.</div><div><br></div><div>...but your wording seems to be an =
entirely different thing: exploring abstract interfaces? defining an =
experiment to evaluate them for applicability to app design patterns? =
This is really something else. Why do you propose such a change at this =
late stage? Who else wants that, and =
why?</div><div><br></div><div><br></div><blockquote =
type=3D"cite"><div><blockquote type=3D"cite">M18: Recharter or =
close.<br></blockquote><br>I recommend we keep this milestone as =
well.<br></div></blockquote><div><br></div></div>+1. That one wasn't =
ever debated I think. =
Fine.</div><div><br></div><div><br></div><div>Cheers,</div><div>Michael</d=
iv><div><br></div></body></html>=

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From: Brian Trammell <ietf@trammell.ch>
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hi Michael,

On 19 Aug 2014, at 11:35, Michael Welzl <michawe@ifi.uio.no> wrote:

> Hi again, all,
>=20
> Did you notice that the two still existing milestones that we still =
have left also come with a status now?
>=20
> Before the London BOF, this bit was:
>=20
> ***
> * M7: Submit summary of the services provided by IETF transport =
protocols and congestion control mechanisms as well as requirements of =
common APIs to IESG as Informational
> * M10: Submit draft on how transport services are identified to IESG =
as Proposed Standard
> * M13: Submit set of services that a transport API should provide to =
IESG as Proposed Standard
> ***
>=20
> - before the Toronto BOF, I was told that there's no need for =
milestones to mention the status of documents, and I should just remove =
that. So we had, in the version of the charter that went to IETF open =
review, even after the Toronto BOF:
>=20
> ***
> * M9: Submit summary of the services provided by IETF transport =
protocols and congestion control mechanisms to IESG.
> * M15: Submit end system transport services to IESG.
> * M18: Submit specification of how the transport services can be =
provided to IESG.
> ***
>=20
> .... and now, all of a sudden, we have:

So let's look at these one by one:

> ***
> * M9: Submit to the IESG an Informational document defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.

I think this is pretty clearly Informational; it was also identified as =
such pre-London, so I don't think this is particularly controversial as =
Informational.=20

(Not really relevant to the charter, but on this point as we discussed =
in the hallway in Toronto, I think the right way to do this is to =
solicit contributions from people in the community who have deep =
knowledge of certain transport protocols to specify these in terms of =
their behaviors in individual I-Ds or I-D sections, then to have an =
editor pull these together into a coherent whole.)

> * M15: Submit to the IESG an Informational document recommending a =
minimal set of Transport Services that end systems should support.

In my opinion, whether this is PS or Info comes down to two questions: =
(1) is there an interoperability reason to specify a set of services =
that must/should/may/must not be provided by end systems and (2) will =
there be normative references to it from future PS documents?

I don't really have an opinion here, though I think I'd lean toward PS =
just for the sake of future utility. Note that if this milestone is PS =
it will have to restate the salient points of each selected behavior / =
service-in-terms-of-behaviors from the first milestone in normative =
language. I'm okay with that too.

Cheers,

Brian


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Subject: Re: [Taps] TAPS charter rev 20140818
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On 19 Aug 2014, at 11:41, Michael Welzl <michawe@ifi.uio.no> wrote:

> Hi Brian, thanks getting into this discussion!
>=20
> In line below:
>=20
> On 19. aug. 2014, at 11:32, Brian Trammell wrote:

<snipping away the vast majority of the charter we seem to agree on>

>> Per the third point of the charter, I think we want to add the third =
milestone back, but make clear that the effort is experimental; =
something like:
>>=20
>> M18: Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services, and defining an experiment to evaluate =
such interfaces for applicability to common application design patterns =
and incremental deployability
>=20
> I think this is a significant change to the wording that we had during =
IETF open review, which was:
>=20
> M18: Submit specification of how the transport services can be =
provided to IESG.
>=20
> I'd be fine with the status of this document explicitly being =
Experimental, as it was before, see:
> =
https://sites.google.com/site/transportprotocolservices/charter-proposal/c=
harter-before-london
> i.e. to change this back to:
>=20
> M18: Submit Experimental specification of how the transport services =
can be provided to IESG.
>=20
> ...but your wording seems to be an entirely different thing: exploring =
abstract interfaces? defining an experiment to evaluate them for =
applicability to app design patterns? This is really something else. Why =
do you propose such a change at this late stage? Who else wants that, =
and why?

I think we need something a bit more specific than "submit specification =
of how the transport services can be provided to the IESG" -- since (for =
my part) I'm not really sure what that means. My wording is simply an =
attempt to take the language from the third "working group will" point =
and turn it into a milestone:

> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2.

i.e. "Submit to the IESG an Experimental document exploring..."

> This document will explain how to select and engage an appropriate =
protocol and how to discover which protocols are available for a given =
connection.=20

"...abstract interfaces to Transport Services..." (since "how to select =
and engage" seems to me to very much be an abstract interface, maybe I'm =
reading it wrong)

> Further, it will provide a basis for incremental deployment. The =
associated milestone will be scheduled and work on this document will =
begin when the TAPS Transport Services have been specified.=20

"...defining an experiment to evaluate such interfaces for... =
incremental deployability". (The bit about application design patterns =
is admittedly something I added to point out it's not _just_ incremental =
deployability we care about, but I would submit that if we're not =
building this in the hope that it addresses common application design =
patterns, then we can all go home.)

I'm of course open to better wording that captures point (3), this is =
just a first suggestion. And we do want something very open... but I =
think "Submit Experimental specification of how the transport services =
can be provided to IESG" is a bit too open.

Thoughts?

Cheers,

Brian

>=20
>>> M18: Recharter or close.
>>=20
>> I recommend we keep this milestone as well.
>=20
> +1. That one wasn't ever debated I think. Fine.
>=20
>=20
> Cheers,
> Michael
>=20
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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Subject: Re: [Taps] TAPS charter rev 20140818
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Hi all,

Having read through the updated charter that Aaron circulated, I also 
find the removal of the third milestone a significant change and would 
like to see it back. From the discussion on the TAPS list, I think this 
has been a big part in motivating the interest for this work.

I also agree with Michael that if we want to indicate that the work is 
experimental (which is fine) we should just insert the word 
"Experimental" in the original milestone again. Brian, the meaning of 
your proposed new wording is very unclear to me as well.

Cheers,
Anna

On 2014-08-19 11:41, Michael Welzl wrote:
> Hi Brian, thanks getting into this discussion!
>
> In line below:
>
> On 19. aug. 2014, at 11:32, Brian Trammell wrote:
>
>> Hi Aaron,
>>
>> Following some (i.e. extensive) hallway discussion in Toronto to 
>> Thursday, I'd make one following suggested changes to this draft 
>> charter, inline.
>>
>> On 19 Aug 2014, at 02:37, Aaron Falk <falk-ietf@dgftech.com 
>> <mailto:falk-ietf@dgftech.com>> wrote:
>>
>>> Hi Folks-
>>>
>>> We received a bit more charter input from the IAB and I've 
>>> incorporated it into the draft below.  Diffs against the last rev 
>>> and the version submitted for IETF comment are also attached (as 
>>> usual).  The IESG will be taking up approval of the TAPS working 
>>> group at their telechat on August 28 so comments, including support, 
>>> are appreciated.
>>>
>>> Regards,
>>>
>>> --aaron
>>>
>>> ------
>>>
>>> Last updated 2014-08-18
>>>
>>>
>>> Transport Services (taps)
>>>
>>> The vast majority of Internet applications make use of the Transport 
>>> Services provided by TCP (a reliable, in-order stream protocol) or 
>>> UDP (an unreliable datagram protocol). We use the term "Transport 
>>> Service" to mean an end-to-end facility provided by the transport 
>>> layer that can only be correctly provided with information from the 
>>> application. This information may be provided at design time, 
>>> compile time, or run time.  Additionally, it may include guidance 
>>> from the application on whether the facility in question is required 
>>> or simply a preference by the application. Four examples of 
>>> Transport Services are reliable delivery, no guarantee of order 
>>> preservation, content privacy to in-path devices, and minimal latency.
>>>
>>> Other transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and 
>>> UDP-Lite and the LEDBAT congestion control mechanism extend the set 
>>> of available Transport Services beyond those provided to 
>>> applications by TCP and UDP. For example, SCTP provides potentially 
>>> faster (than TCP) reliable delivery for applications that can accept 
>>> blocks of data out of order, and LEDBAT provides low-priority 
>>> "scavenger" communication.
>>>
>>> Application programmers face difficulty when they use protocols 
>>> other than TCP or UDP. Most network stacks ship with only TCP and 
>>> UDP as transport protocols.  Many firewalls only pass TCP and UDP 
>>> and some only support HTTP over TCP. As a result, using other 
>>> transport protocols or building a new protocol over raw sockets, 
>>> risks having an application not work in many environments. 
>>> Applications, therefore, must always be able to fall back to TCP or 
>>> UDP, or even HTTP in many cases, and once the application programmer 
>>> has committed to making an application work on TCP or UDP or HTTP, 
>>> there is little incentive to try other transport protocols before 
>>> falling back. Further, different protocols can provide the same 
>>> services in different ways. Layering decisions must be made (for 
>>> example, whether a protocol is used natively or tunneled through UDP).
>>>
>>> Because of these complications, programmers often resort to either 
>>> using TCP or HTTP, or implementing their own customized "transport 
>>> services" over UDP. When application developers re-implement 
>>> transport features already available elsewhere, they open the door 
>>> to problems that simply using TCP would have avoided, and ensure 
>>> that the applications can't benefit from other transport protocols 
>>> as they become available.
>>>
>>> Because even TCP and UDP are not guaranteed to work in all 
>>> environments today, some programmers simply give up on using TCP or 
>>> UDP directly, relying instead on "HTTP as a Substrate". BCP 56 
>>> identified many issues with this strategy, but assuming that if "any 
>>> protocol is available on a given network path and on the hosts that 
>>> will be communicating, that protocol will be HTTP" is a reasonable 
>>> strategy for today's Internet. The IESG has agreed with this 
>>> viewpoint enough to publish the WebSocket protocol on the standards 
>>> track.
>>>
>>> The goal of the TAPS working group is to help application and 
>>> network stack programmers by describing an (abstract) interface for 
>>> applications to make use of Transport Services. The Working Group 
>>> deliverables emphasize defining Transport Services that are 
>>> important to applications followed by experimental mechanisms to a) 
>>> determine if the protocols to provide the requested services are 
>>> available on the end points and supported along the path in the 
>>> network and b) fall back, i.e., select alternate, possibly 
>>> less-preferred, protocols when desired protocols are not available. 
>>> The Working Group will not define a richer set of Transport Services 
>>> for applications, although the TAPS deliverables could inform 
>>> proposals for future chartered work on Transport Services.
>>>
>>> The Working Group will:
>>>
>>> 1) Define a set of Transport Services, prioritizing those provided 
>>> by existing IETF protocols and congestion control mechanisms. As a 
>>> starting point, the working group will consider services used 
>>> between two endpoints.
>>>
>>> 2) Note that not all capabilities of IETF Transport protocols need 
>>> to be exposed as Transport Services. This document will recommend 
>>> the minimal set of Transport Services for inclusion in the abstract 
>>> API. The resulting document will also provide guidance on making a 
>>> choice among available mechanisms and protocols to obtain a certain 
>>> Transport Service.
>>>
>>> 3) Specify experimental support mechanisms to provide the Transport 
>>> Services identified in work item 2. This document will explain how 
>>> to select and engage an appropriate protocol and how to discover 
>>> which protocols are available for a given connection. Further, it 
>>> will provide a basis for incremental deployment. The associated 
>>> milestone will be scheduled and work on this document will begin 
>>> when the TAPS Transport Services have been specified.
>>>
>>> The following topics are out of scope for this Working Group:
>>>
>>> - Signaling-based Quality-of-Service (QoS) mechanisms
>>>
>>> - Definition of new encapsulations and tunneling mechanisms
>>>
>>> - Extension, modification, or creation of existing IETF transport 
>>> protocols
>>>
>>> - Language-specific APIs
>>>
>>> TAPS is not chartered to perform detailed analysis of the security 
>>> aspects of transport protocols, but TAPS is being chartered almost 
>>> simultaneously with TCPINC, which is developing the TCP extensions 
>>> to provide unauthenticated encryption and integrity protection of 
>>> TCP streams, and TAPS will work with TCPINC to ensure that TAPS will 
>>> be able to accommodate the protocol extensions that TCPINC defines.
>>>
>>> Milestones:
>>>
>>> M9: Submit to the IESG an Informational document defining a set of 
>>> services provided by IETF transport protocols and congestion control 
>>> mechanisms.
>>> M15: Submit to the IESG an Informational document recommending a 
>>> minimal set of Transport Services that end systems should support.
>>
>> Per the third point of the charter, I think we want to add the third 
>> milestone back, but make clear that the effort is experimental; 
>> something like:
>>
>> M18: Submit to the IESG an Experimental document exploring abstract 
>> interfaces to Transport Services, and defining an experiment to 
>> evaluate such interfaces for applicability to common application 
>> design patterns and incremental deployability
>
> I think this is a significant change to the wording that we had during 
> IETF open review, which was:
>
> M18: Submit specification of how the transport services can be 
> provided to IESG.
>
> I'd be fine with the status of this document explicitly being 
> Experimental, as it was before, see:
> https://sites.google.com/site/transportprotocolservices/charter-proposal/charter-before-london
> i.e. to change this back to:
>
> M18: Submit Experimental specification of how the transport services 
> can be provided to IESG.
>
> ...but your wording seems to be an entirely different thing: exploring 
> abstract interfaces? defining an experiment to evaluate them for 
> applicability to app design patterns? This is really something else. 
> Why do you propose such a change at this late stage? Who else wants 
> that, and why?
>
>
>>> M18: Recharter or close.
>>
>> I recommend we keep this milestone as well.
>
> +1. That one wasn't ever debated I think. Fine.
>
>
> Cheers,
> Michael
>
>
>
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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    Hi all,<br>
    <br>
    Having read through the updated charter that Aaron circulated, I
    also find the removal of the third milestone a significant change
    and would like to see it back. From the discussion on the TAPS list,
    I think this has been a big part in motivating the interest for this
    work.<br>
    <br>
    I also agree with Michael that if we want to indicate that the work
    is experimental (which is fine) we should just insert the word
    "Experimental" in the original milestone again. Brian, the meaning
    of your proposed new wording is very unclear to me as well.<br>
    <br>
    Cheers,<br>
    Anna<br>
    <br>
    <div class="moz-cite-prefix">On 2014-08-19 11:41, Michael Welzl
      wrote:<br>
    </div>
    <blockquote
      cite="mid:FC6D0B0A-D764-42DC-90A9-5D157F924610@ifi.uio.no"
      type="cite">Hi Brian, thanks getting into this discussion!
      <div><br>
      </div>
      <div>In line below:</div>
      <div><br>
      </div>
      <div>
        <div>
          <div>On 19. aug. 2014, at 11:32, Brian Trammell wrote:</div>
          <br class="Apple-interchange-newline">
          <blockquote type="cite">
            <div>Hi Aaron,<br>
              <br>
              Following some (i.e. extensive) hallway discussion in
              Toronto to Thursday, I'd make one following suggested
              changes to this draft charter, inline.<br>
              <br>
              On 19 Aug 2014, at 02:37, Aaron Falk &lt;<a
                moz-do-not-send="true"
                href="mailto:falk-ietf@dgftech.com">falk-ietf@dgftech.com</a>&gt;
              wrote:<br>
              <br>
              <blockquote type="cite">Hi Folks-<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">We received a bit more charter
                input from the IAB and I've incorporated it into the
                draft below. &nbsp;Diffs against the last rev and the version
                submitted for IETF comment are also attached (as usual).
                &nbsp;The IESG will be taking up approval of the TAPS working
                group at their telechat on August 28 so comments,
                including support, are appreciated.<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Regards,<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">--aaron<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">------<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Last updated 2014-08-18<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Transport Services (taps) <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">The vast majority of Internet
                applications make use of the Transport Services provided
                by TCP (a reliable, in-order stream protocol) or UDP (an
                unreliable datagram protocol). We use the term
                "Transport Service" to mean an end-to-end facility
                provided by the transport layer that can only be
                correctly provided with information from the
                application. This information may be provided at design
                time, compile time, or run time. &nbsp;Additionally, it may
                include guidance from the application on whether the
                facility in question is required or simply a preference
                by the application. Four examples of Transport Services
                are reliable delivery, no guarantee of order
                preservation, content privacy to in-path devices, and
                minimal latency.<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Other transport protocols such as
                SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and the
                LEDBAT congestion control mechanism extend the set of
                available Transport Services beyond those provided to
                applications by TCP and UDP. For example, SCTP provides
                potentially faster (than TCP) reliable delivery for
                applications that can accept blocks of data out of
                order, and LEDBAT provides low-priority "scavenger"
                communication. <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Application programmers face
                difficulty when they use protocols other than TCP or
                UDP. Most network stacks ship with only TCP and UDP as
                transport protocols. &nbsp;Many firewalls only pass TCP and
                UDP and some only support HTTP over TCP. As a result,
                using other transport protocols or building a new
                protocol over raw sockets, risks having an application
                not work in many environments. Applications, therefore,
                must always be able to fall back to TCP or UDP, or even
                HTTP in many cases, and once the application programmer
                has committed to making an application work on TCP or
                UDP or HTTP, there is little incentive to try other
                transport protocols before falling back. Further,
                different protocols can provide the same services in
                different ways. Layering decisions must be made (for
                example, whether a protocol is used natively or tunneled
                through UDP). <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Because of these complications,
                programmers often resort to either using TCP or HTTP, or
                implementing their own customized "transport services"
                over UDP. When application developers re-implement
                transport features already available elsewhere, they
                open the door to problems that simply using TCP would
                have avoided, and ensure that the applications can't
                benefit from other transport protocols as they become
                available. <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Because even TCP and UDP are not
                guaranteed to work in all environments today, some
                programmers simply give up on using TCP or UDP directly,
                relying instead on "HTTP as a Substrate". BCP 56
                identified many issues with this strategy, but assuming
                that if "any protocol is available on a given network
                path and on the hosts that will be communicating, that
                protocol will be HTTP" is a reasonable strategy for
                today's Internet. The IESG has agreed with this
                viewpoint enough to publish the WebSocket protocol on
                the standards track. <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">The goal of the TAPS working group
                is to help application and network stack programmers by
                describing an (abstract) interface for applications to
                make use of Transport Services. The Working Group
                deliverables emphasize defining Transport Services that
                are important to applications followed by experimental
                mechanisms to a) determine if the protocols to provide
                the requested services are available on the end points
                and supported along the path in the network and b) fall
                back, i.e., select alternate, possibly less-preferred,
                protocols when desired protocols are not available. The
                Working Group will not define a richer set of Transport
                Services for applications, although the TAPS
                deliverables could inform proposals for future chartered
                work on Transport Services. <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">The Working Group will:<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">1) Define a set of Transport
                Services, prioritizing those provided by existing IETF
                protocols and congestion control mechanisms. As a
                starting point, the working group will consider services
                used between two endpoints.<br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">2) Note that not all capabilities
                of IETF Transport protocols need to be exposed as
                Transport Services. This document will recommend the
                minimal set of Transport Services for inclusion in the
                abstract API. The resulting document will also provide
                guidance on making a choice among available mechanisms
                and protocols to obtain a certain Transport Service. <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">3) Specify experimental support
                mechanisms to provide the Transport Services identified
                in work item 2. This document will explain how to select
                and engage an appropriate protocol and how to discover
                which protocols are available for a given connection.
                Further, it will provide a basis for incremental
                deployment. The associated milestone will be scheduled
                and work on this document will begin when the TAPS
                Transport Services have been specified. <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">The following topics are out of
                scope for this Working Group: <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">- Signaling-based
                Quality-of-Service (QoS) mechanisms <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">- Definition of new encapsulations
                and tunneling mechanisms <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">- Extension, modification, or
                creation of existing IETF transport protocols <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">- Language-specific APIs <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">TAPS is not chartered to perform
                detailed analysis of the security aspects of transport
                protocols, but TAPS is being chartered almost
                simultaneously with TCPINC, which is developing the TCP
                extensions to provide unauthenticated encryption and
                integrity protection of TCP streams, and TAPS will work
                with TCPINC to ensure that TAPS will be able to
                accommodate the protocol extensions that TCPINC defines.
                <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">Milestones: <br>
              </blockquote>
              <blockquote type="cite"><br>
              </blockquote>
              <blockquote type="cite">M9: Submit to the IESG an
                Informational document defining a set of services
                provided by IETF transport protocols and congestion
                control mechanisms.<br>
              </blockquote>
              <blockquote type="cite">M15: Submit to the IESG an
                Informational document recommending a minimal set of
                Transport Services that end systems should support.<br>
              </blockquote>
              <br>
              Per the third point of the charter, I think we want to add
              the third milestone back, but make clear that the effort
              is experimental; something like:<br>
              <br>
              M18: Submit to the IESG an Experimental document exploring
              abstract interfaces to Transport Services, and defining an
              experiment to evaluate such interfaces for applicability
              to common application design patterns and incremental
              deployability<br>
            </div>
          </blockquote>
          <div><br>
          </div>
          <div>I think this is a significant change to the wording that
            we had during IETF open review, which was:</div>
          <div><br>
          </div>
          <div>M18: Submit specification of how the transport services
            can be provided to IESG.</div>
          <div><br>
          </div>
          <div>I'd be fine with the status of this document explicitly
            being Experimental, as it was before, see:</div>
          <div><a moz-do-not-send="true"
href="https://sites.google.com/site/transportprotocolservices/charter-proposal/charter-before-london">https://sites.google.com/site/transportprotocolservices/charter-proposal/charter-before-london</a></div>
          <div>i.e. to change this back to:</div>
          <div><br>
          </div>
          <div>M18: Submit Experimental specification of how the
            transport services can be provided to IESG.</div>
          <div><br>
          </div>
          <div>...but your wording seems to be an entirely different
            thing: exploring abstract interfaces? defining an experiment
            to evaluate them for applicability to app design patterns?
            This is really something else. Why do you propose such a
            change at this late stage? Who else wants that, and why?</div>
          <div><br>
          </div>
          <div><br>
          </div>
          <blockquote type="cite">
            <div>
              <blockquote type="cite">M18: Recharter or close.<br>
              </blockquote>
              <br>
              I recommend we keep this milestone as well.<br>
            </div>
          </blockquote>
          <div><br>
          </div>
        </div>
        +1. That one wasn't ever debated I think. Fine.</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div>Cheers,</div>
      <div>Michael</div>
      <div><br>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
Taps mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Taps@ietf.org">Taps@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/taps">https://www.ietf.org/mailman/listinfo/taps</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

--------------010301050609030201070008--


From nobody Tue Aug 19 04:25:21 2014
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Subject: Re: [Taps] Another significant detail: status of RFCs
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On 19. aug. 2014, at 12:07, Brian Trammell wrote:

> hi Michael,
>=20
> On 19 Aug 2014, at 11:35, Michael Welzl <michawe@ifi.uio.no> wrote:
>=20
>> Hi again, all,
>>=20
>> Did you notice that the two still existing milestones that we still =
have left also come with a status now?
>>=20
>> Before the London BOF, this bit was:
>>=20
>> ***
>> * M7: Submit summary of the services provided by IETF transport =
protocols and congestion control mechanisms as well as requirements of =
common APIs to IESG as Informational
>> * M10: Submit draft on how transport services are identified to IESG =
as Proposed Standard
>> * M13: Submit set of services that a transport API should provide to =
IESG as Proposed Standard
>> ***
>>=20
>> - before the Toronto BOF, I was told that there's no need for =
milestones to mention the status of documents, and I should just remove =
that. So we had, in the version of the charter that went to IETF open =
review, even after the Toronto BOF:
>>=20
>> ***
>> * M9: Submit summary of the services provided by IETF transport =
protocols and congestion control mechanisms to IESG.
>> * M15: Submit end system transport services to IESG.
>> * M18: Submit specification of how the transport services can be =
provided to IESG.
>> ***
>>=20
>> .... and now, all of a sudden, we have:
>=20
> So let's look at these one by one:
>=20
>> ***
>> * M9: Submit to the IESG an Informational document defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
>=20
> I think this is pretty clearly Informational; it was also identified =
as such pre-London, so I don't think this is particularly controversial =
as Informational.=20

ACK.


> (Not really relevant to the charter, but on this point as we discussed =
in the hallway in Toronto, I think the right way to do this is to =
solicit contributions from people in the community who have deep =
knowledge of certain transport protocols to specify these in terms of =
their behaviors in individual I-Ds or I-D sections, then to have an =
editor pull these together into a coherent whole.)

Indeed, not a charter suggestion but a good plan I think.


>> * M15: Submit to the IESG an Informational document recommending a =
minimal set of Transport Services that end systems should support.
>=20
> In my opinion, whether this is PS or Info comes down to two questions: =
(1) is there an interoperability reason to specify a set of services =
that must/should/may/must not be provided by end systems and (2) will =
there be normative references to it from future PS documents?

What you say makes sense to me. I actually don't remember who proposed =
to make this PS and why, and I can live with both. I just wanted to =
bring the question back to the group, as it is a change to how things =
were originally written. We had PS written there for a long time, went =
to "no status mentioned" because it was said that it needs no mention, =
and now it's Informational.


> I don't really have an opinion here, though I think I'd lean toward PS =
just for the sake of future utility. Note that if this milestone is PS =
it will have to restate the salient points of each selected behavior / =
service-in-terms-of-behaviors from the first milestone in normative =
language. I'm okay with that too.

Me too...   sounds like we should go back to PS on this one, then.

Cheers,
Michael


From nobody Tue Aug 19 04:31:58 2014
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From: Marie-Jose Montpetit <mariejo@mit.edu>
To: Michael Welzl <michawe@ifi.uio.no>, Brian Trammell <ietf@trammell.ch>
Thread-Topic: [Taps] Another significant detail: status of RFCs
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In my opnion the removal of the milestone and the move to "informational" i=
s significant. If we want TAPS to have any impact of the standardization of=
 a common approach to using alternative transport layers (and we all know e=
veyone seems to be disigning their own right now) then at least one "experi=
mental" document is essential. If not the whole exercise may only provide a=
nother nice reading.=0A=
=0A=
But I may be wrong.=0A=
=0A=
Marie-Jos=E9=0A=
=0A=
Marie-Jos=E9 Montpetit, Ph.D.=0A=
MIT=0A=
________________________________________=0A=
From: Taps [taps-bounces@ietf.org] on behalf of Michael Welzl [michawe@ifi.=
uio.no]=0A=
Sent: Tuesday, August 19, 2014 7:25 AM=0A=
To: Brian Trammell=0A=
Cc: taps@ietf.org=0A=
Subject: Re: [Taps] Another significant detail: status of RFCs=0A=
=0A=
On 19. aug. 2014, at 12:07, Brian Trammell wrote:=0A=
=0A=
> hi Michael,=0A=
>=0A=
> On 19 Aug 2014, at 11:35, Michael Welzl <michawe@ifi.uio.no> wrote:=0A=
>=0A=
>> Hi again, all,=0A=
>>=0A=
>> Did you notice that the two still existing milestones that we still have=
 left also come with a status now?=0A=
>>=0A=
>> Before the London BOF, this bit was:=0A=
>>=0A=
>> ***=0A=
>> * M7: Submit summary of the services provided by IETF transport protocol=
s and congestion control mechanisms as well as requirements of common APIs =
to IESG as Informational=0A=
>> * M10: Submit draft on how transport services are identified to IESG as =
Proposed Standard=0A=
>> * M13: Submit set of services that a transport API should provide to IES=
G as Proposed Standard=0A=
>> ***=0A=
>>=0A=
>> - before the Toronto BOF, I was told that there's no need for milestones=
 to mention the status of documents, and I should just remove that. So we h=
ad, in the version of the charter that went to IETF open review, even after=
 the Toronto BOF:=0A=
>>=0A=
>> ***=0A=
>> * M9: Submit summary of the services provided by IETF transport protocol=
s and congestion control mechanisms to IESG.=0A=
>> * M15: Submit end system transport services to IESG.=0A=
>> * M18: Submit specification of how the transport services can be provide=
d to IESG.=0A=
>> ***=0A=
>>=0A=
>> .... and now, all of a sudden, we have:=0A=
>=0A=
> So let's look at these one by one:=0A=
>=0A=
>> ***=0A=
>> * M9: Submit to the IESG an Informational document defining a set of ser=
vices provided by IETF transport protocols and congestion control mechanism=
s.=0A=
>=0A=
> I think this is pretty clearly Informational; it was also identified as s=
uch pre-London, so I don't think this is particularly controversial as Info=
rmational.=0A=
=0A=
ACK.=0A=
=0A=
=0A=
> (Not really relevant to the charter, but on this point as we discussed in=
 the hallway in Toronto, I think the right way to do this is to solicit con=
tributions from people in the community who have deep knowledge of certain =
transport protocols to specify these in terms of their behaviors in individ=
ual I-Ds or I-D sections, then to have an editor pull these together into a=
 coherent whole.)=0A=
=0A=
Indeed, not a charter suggestion but a good plan I think.=0A=
=0A=
=0A=
>> * M15: Submit to the IESG an Informational document recommending a minim=
al set of Transport Services that end systems should support.=0A=
>=0A=
> In my opinion, whether this is PS or Info comes down to two questions: (1=
) is there an interoperability reason to specify a set of services that mus=
t/should/may/must not be provided by end systems and (2) will there be norm=
ative references to it from future PS documents?=0A=
=0A=
What you say makes sense to me. I actually don't remember who proposed to m=
ake this PS and why, and I can live with both. I just wanted to bring the q=
uestion back to the group, as it is a change to how things were originally =
written. We had PS written there for a long time, went to "no status mentio=
ned" because it was said that it needs no mention, and now it's Information=
al.=0A=
=0A=
=0A=
> I don't really have an opinion here, though I think I'd lean toward PS ju=
st for the sake of future utility. Note that if this milestone is PS it wil=
l have to restate the salient points of each selected behavior / service-in=
-terms-of-behaviors from the first milestone in normative language. I'm oka=
y with that too.=0A=
=0A=
Me too...   sounds like we should go back to PS on this one, then.=0A=
=0A=
Cheers,=0A=
Michael=0A=
=0A=
_______________________________________________=0A=
Taps mailing list=0A=
Taps@ietf.org=0A=
https://www.ietf.org/mailman/listinfo/taps=0A=


From nobody Tue Aug 19 04:41:03 2014
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Subject: Re: [Taps] TAPS charter rev 20140818
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On 19. aug. 2014, at 12:07, Brian Trammell wrote:

>=20
> On 19 Aug 2014, at 11:41, Michael Welzl <michawe@ifi.uio.no> wrote:
>=20
>> Hi Brian, thanks getting into this discussion!
>>=20
>> In line below:
>>=20
>> On 19. aug. 2014, at 11:32, Brian Trammell wrote:
>=20
> <snipping away the vast majority of the charter we seem to agree on>
>=20
>>> Per the third point of the charter, I think we want to add the third =
milestone back, but make clear that the effort is experimental; =
something like:
>>>=20
>>> M18: Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services, and defining an experiment to evaluate =
such interfaces for applicability to common application design patterns =
and incremental deployability
>>=20
>> I think this is a significant change to the wording that we had =
during IETF open review, which was:
>>=20
>> M18: Submit specification of how the transport services can be =
provided to IESG.
>>=20
>> I'd be fine with the status of this document explicitly being =
Experimental, as it was before, see:
>> =
https://sites.google.com/site/transportprotocolservices/charter-proposal/c=
harter-before-london
>> i.e. to change this back to:
>>=20
>> M18: Submit Experimental specification of how the transport services =
can be provided to IESG.
>>=20
>> ...but your wording seems to be an entirely different thing: =
exploring abstract interfaces? defining an experiment to evaluate them =
for applicability to app design patterns? This is really something else. =
Why do you propose such a change at this late stage? Who else wants =
that, and why?
>=20
> I think we need something a bit more specific than "submit =
specification of how the transport services can be provided to the IESG" =
-- since (for my part) I'm not really sure what that means. My wording =
is simply an attempt to take the language from the third "working group =
will" point and turn it into a milestone:
>=20
>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2.
>=20
> i.e. "Submit to the IESG an Experimental document exploring..."
>=20
>> This document will explain how to select and engage an appropriate =
protocol and how to discover which protocols are available for a given =
connection.=20
>=20
> "...abstract interfaces to Transport Services..." (since "how to =
select and engage" seems to me to very much be an abstract interface, =
maybe I'm reading it wrong)

I'm pretty sure that the whole phrase was meant to mean some form of =
"Happy Eyeballs++ for transports". I think this is obvious for the =
second half ("discover which protocols are available..."), but =
end-to-end, more than that is required. If Happy Eyeballs gives me a TCP =
response before it gives me a protocol X response that I'm hoping for, =
do I wait or just use X later in case it arrives? And: do we need to =
tell the other end what we're doing? Find out what the other side is =
even capable of?  (for some services we do, for some we don't).

We can now start wordsmithing to try to put this into clearer words, but =
I didn't think this is the right time to do that... we've been =
wordsmithing so much?!  and I have trouble interpreting the phrase as an =
"abstract interface", frankly, but this may be just me who has looked at =
the text from one particular angle for so long.


>> Further, it will provide a basis for incremental deployment. The =
associated milestone will be scheduled and work on this document will =
begin when the TAPS Transport Services have been specified.=20
>=20
> "...defining an experiment to evaluate such interfaces for... =
incremental deployability". (The bit about application design patterns =
is admittedly something I added to point out it's not _just_ incremental =
deployability we care about, but I would submit that if we're not =
building this in the hope that it addresses common application design =
patterns, then we can all go home.)

We've been around the "common application application design patterns" =
block, see Martin Sustrik's presentation in London, the minutes, and =
extensive list discussion on that topic. This didn't culminate in =
charter text and I'd suggest to not insert such text now.


> I'm of course open to better wording that captures point (3), this is =
just a first suggestion. And we do want something very open... but I =
think "Submit Experimental specification of how the transport services =
can be provided to IESG" is a bit too open.
>=20
> Thoughts?

Personally I think this is less open than the wording you suggested, but =
that's just me not understanding what you even mean with "abstract =
interface", and inserting something about application design patterns =
doesn't exactly make it clearer I think.

I tried to explain what was meant with the original text but haven't =
made a text proposal. If we must change the text then I'd welcome =
proposals from others. But I seriously wonder if we *really* have to, =
and *really* should, at this point: with every change we insert, one =
person that liked things as they were during IESG review or IETF review =
might then not like the text anymore. I guess we should do only very =
minor changes at this late stage, and I don't actually think what we're =
now discussing is so minor.

Cheers,
Michael


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From: Brian Trammell <ietf@trammell.ch>
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Subject: Re: [Taps] TAPS charter rev 20140818
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On 19 Aug 2014, at 13:40, Michael Welzl <michawe@ifi.uio.no> wrote:

>=20
> On 19. aug. 2014, at 12:07, Brian Trammell wrote:
>=20
>>=20
>> On 19 Aug 2014, at 11:41, Michael Welzl <michawe@ifi.uio.no> wrote:
>>=20
>>> Hi Brian, thanks getting into this discussion!
>>>=20
>>> In line below:
>>>=20
>>> On 19. aug. 2014, at 11:32, Brian Trammell wrote:
>>=20
>> <snipping away the vast majority of the charter we seem to agree on>
>>=20
>>>> Per the third point of the charter, I think we want to add the =
third milestone back, but make clear that the effort is experimental; =
something like:
>>>>=20
>>>> M18: Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services, and defining an experiment to evaluate =
such interfaces for applicability to common application design patterns =
and incremental deployability
>>>=20
>>> I think this is a significant change to the wording that we had =
during IETF open review, which was:
>>>=20
>>> M18: Submit specification of how the transport services can be =
provided to IESG.
>>>=20
>>> I'd be fine with the status of this document explicitly being =
Experimental, as it was before, see:
>>> =
https://sites.google.com/site/transportprotocolservices/charter-proposal/c=
harter-before-london
>>> i.e. to change this back to:
>>>=20
>>> M18: Submit Experimental specification of how the transport services =
can be provided to IESG.
>>>=20
>>> ...but your wording seems to be an entirely different thing: =
exploring abstract interfaces? defining an experiment to evaluate them =
for applicability to app design patterns? This is really something else. =
Why do you propose such a change at this late stage? Who else wants =
that, and why?
>>=20
>> I think we need something a bit more specific than "submit =
specification of how the transport services can be provided to the IESG" =
-- since (for my part) I'm not really sure what that means. My wording =
is simply an attempt to take the language from the third "working group =
will" point and turn it into a milestone:
>>=20
>>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2.
>>=20
>> i.e. "Submit to the IESG an Experimental document exploring..."
>>=20
>>> This document will explain how to select and engage an appropriate =
protocol and how to discover which protocols are available for a given =
connection.=20
>>=20
>> "...abstract interfaces to Transport Services..." (since "how to =
select and engage" seems to me to very much be an abstract interface, =
maybe I'm reading it wrong)
>=20
> I'm pretty sure that the whole phrase was meant to mean some form of =
"Happy Eyeballs++ for transports". I think this is obvious for the =
second half ("discover which protocols are available..."), but =
end-to-end, more than that is required. If Happy Eyeballs gives me a TCP =
response before it gives me a protocol X response that I'm hoping for, =
do I wait or just use X later in case it arrives? And: do we need to =
tell the other end what we're doing? Find out what the other side is =
even capable of?  (for some services we do, for some we don't).

ACK.

> We can now start wordsmithing to try to put this into clearer words, =
but I didn't think this is the right time to do that... we've been =
wordsmithing so much?!  and I have trouble interpreting the phrase as an =
"abstract interface", frankly, but this may be just me who has looked at =
the text from one particular angle for so long.

So to me the abstract interface is how the application specifies what =
things should get happy eyeballs'd (since trying to figure out if we can =
get PR-SCTP down the path is pointless if we don't want retransmission =
at all). I know we don't belong to the the billion-knobs school of =
transport configuration here, but the app needs to be able to specify =
what it expects.=20

(Further down the program -- in the bit of the work we specifically =
agreed not to do yet because views start diverging wildly -- there's the =
question of how to broaden out the interface beyond establishment time.)

>>> Further, it will provide a basis for incremental deployment. The =
associated milestone will be scheduled and work on this document will =
begin when the TAPS Transport Services have been specified.=20
>>=20
>> "...defining an experiment to evaluate such interfaces for... =
incremental deployability". (The bit about application design patterns =
is admittedly something I added to point out it's not _just_ incremental =
deployability we care about, but I would submit that if we're not =
building this in the hope that it addresses common application design =
patterns, then we can all go home.)
>=20
> We've been around the "common application application design patterns" =
block, see Martin Sustrik's presentation in London, the minutes, and =
extensive list discussion on that topic. This didn't culminate in =
charter text and I'd suggest to not insert such text now.

ACK. Though we still need language that makes it clear that it's =
applications that are expected to make use of the transport services we =
specify.

>> I'm of course open to better wording that captures point (3), this is =
just a first suggestion. And we do want something very open... but I =
think "Submit Experimental specification of how the transport services =
can be provided to IESG" is a bit too open.
>>=20
>> Thoughts?
>=20
> Personally I think this is less open than the wording you suggested, =
but that's just me not understanding what you even mean with "abstract =
interface", and inserting something about application design patterns =
doesn't exactly make it clearer I think.

Okay. I can't really understand how I would evaluate whether a given =
document provides a "specification of how the transport services can be =
provided", but as long as the WG and the chairs can, then that doesn't =
really matter.

One English as well: "can be provided" really reads here as though it =
binds to "to the IESG". We're not trying to provide transport services =
to the IESG. :) So I'd say at minimum we need to make this point =
parallel to the others, and point out the apps-are-our-users bit:

M18: Submit to the IESG an Experimental document specifying methods for =
providing the Transport Services identified by the WG to applications.

How's that?

Cheers,

Brian

> I tried to explain what was meant with the original text but haven't =
made a text proposal. If we must change the text then I'd welcome =
proposals from others. But I seriously wonder if we *really* have to, =
and *really* should, at this point: with every change we insert, one =
person that liked things as they were during IESG review or IETF review =
might then not like the text anymore. I guess we should do only very =
minor changes at this late stage, and I don't actually think what we're =
now discussing is so minor.
>=20
> Cheers,
> Michael


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From nobody Tue Aug 19 05:11:08 2014
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Subject: Re: [Taps] TAPS charter rev 20140818
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On 19. aug. 2014, at 14:01, Brian Trammell wrote:

>=20
> On 19 Aug 2014, at 13:40, Michael Welzl <michawe@ifi.uio.no> wrote:
>=20
>>=20
>> On 19. aug. 2014, at 12:07, Brian Trammell wrote:
>>=20
>>>=20
>>> On 19 Aug 2014, at 11:41, Michael Welzl <michawe@ifi.uio.no> wrote:
>>>=20
>>>> Hi Brian, thanks getting into this discussion!
>>>>=20
>>>> In line below:
>>>>=20
>>>> On 19. aug. 2014, at 11:32, Brian Trammell wrote:
>>>=20
>>> <snipping away the vast majority of the charter we seem to agree on>
>>>=20
>>>>> Per the third point of the charter, I think we want to add the =
third milestone back, but make clear that the effort is experimental; =
something like:
>>>>>=20
>>>>> M18: Submit to the IESG an Experimental document exploring =
abstract interfaces to Transport Services, and defining an experiment to =
evaluate such interfaces for applicability to common application design =
patterns and incremental deployability
>>>>=20
>>>> I think this is a significant change to the wording that we had =
during IETF open review, which was:
>>>>=20
>>>> M18: Submit specification of how the transport services can be =
provided to IESG.
>>>>=20
>>>> I'd be fine with the status of this document explicitly being =
Experimental, as it was before, see:
>>>> =
https://sites.google.com/site/transportprotocolservices/charter-proposal/c=
harter-before-london
>>>> i.e. to change this back to:
>>>>=20
>>>> M18: Submit Experimental specification of how the transport =
services can be provided to IESG.
>>>>=20
>>>> ...but your wording seems to be an entirely different thing: =
exploring abstract interfaces? defining an experiment to evaluate them =
for applicability to app design patterns? This is really something else. =
Why do you propose such a change at this late stage? Who else wants =
that, and why?
>>>=20
>>> I think we need something a bit more specific than "submit =
specification of how the transport services can be provided to the IESG" =
-- since (for my part) I'm not really sure what that means. My wording =
is simply an attempt to take the language from the third "working group =
will" point and turn it into a milestone:
>>>=20
>>>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2.
>>>=20
>>> i.e. "Submit to the IESG an Experimental document exploring..."
>>>=20
>>>> This document will explain how to select and engage an appropriate =
protocol and how to discover which protocols are available for a given =
connection.=20
>>>=20
>>> "...abstract interfaces to Transport Services..." (since "how to =
select and engage" seems to me to very much be an abstract interface, =
maybe I'm reading it wrong)
>>=20
>> I'm pretty sure that the whole phrase was meant to mean some form of =
"Happy Eyeballs++ for transports". I think this is obvious for the =
second half ("discover which protocols are available..."), but =
end-to-end, more than that is required. If Happy Eyeballs gives me a TCP =
response before it gives me a protocol X response that I'm hoping for, =
do I wait or just use X later in case it arrives? And: do we need to =
tell the other end what we're doing? Find out what the other side is =
even capable of?  (for some services we do, for some we don't).
>=20
> ACK.
>=20
>> We can now start wordsmithing to try to put this into clearer words, =
but I didn't think this is the right time to do that... we've been =
wordsmithing so much?!  and I have trouble interpreting the phrase as an =
"abstract interface", frankly, but this may be just me who has looked at =
the text from one particular angle for so long.
>=20
> So to me the abstract interface is how the application specifies what =
things should get happy eyeballs'd (since trying to figure out if we can =
get PR-SCTP down the path is pointless if we don't want retransmission =
at all). I know we don't belong to the the billion-knobs school of =
transport configuration here, but the app needs to be able to specify =
what it expects.=20
>=20
> (Further down the program -- in the bit of the work we specifically =
agreed not to do yet because views start diverging wildly -- there's the =
question of how to broaden out the interface beyond establishment time.)

Well...  the group started out wanting to do an API. After grinding by =
the IETF mill, this became the first two documents: lists of services. =
So we shouldn't go down that path again, I'm afraid (don't get me wrong, =
I'd like to see an API; we had it in there once, as another =
Informational RFC, but someone asked to have it removed; maybe this is =
one of the things we can consider defining when we recharter?).


>>>> Further, it will provide a basis for incremental deployment. The =
associated milestone will be scheduled and work on this document will =
begin when the TAPS Transport Services have been specified.=20
>>>=20
>>> "...defining an experiment to evaluate such interfaces for... =
incremental deployability". (The bit about application design patterns =
is admittedly something I added to point out it's not _just_ incremental =
deployability we care about, but I would submit that if we're not =
building this in the hope that it addresses common application design =
patterns, then we can all go home.)
>>=20
>> We've been around the "common application application design =
patterns" block, see Martin Sustrik's presentation in London, the =
minutes, and extensive list discussion on that topic. This didn't =
culminate in charter text and I'd suggest to not insert such text now.
>=20
> ACK. Though we still need language that makes it clear that it's =
applications that are expected to make use of the transport services we =
specify.

Isn't that obvious? Who else would?


>>> I'm of course open to better wording that captures point (3), this =
is just a first suggestion. And we do want something very open... but I =
think "Submit Experimental specification of how the transport services =
can be provided to IESG" is a bit too open.
>>>=20
>>> Thoughts?
>>=20
>> Personally I think this is less open than the wording you suggested, =
but that's just me not understanding what you even mean with "abstract =
interface", and inserting something about application design patterns =
doesn't exactly make it clearer I think.
>=20
> Okay. I can't really understand how I would evaluate whether a given =
document provides a "specification of how the transport services can be =
provided", but as long as the WG and the chairs can, then that doesn't =
really matter.
>=20
> One English as well: "can be provided" really reads here as though it =
binds to "to the IESG". We're not trying to provide transport services =
to the IESG. :) So I'd say at minimum we need to make this point =
parallel to the others, and point out the apps-are-our-users bit:
>=20
> M18: Submit to the IESG an Experimental document specifying methods =
for providing the Transport Services identified by the WG to =
applications.
>=20
> How's that?

Fine by me (and thanks for the fix).

Cheers,
Michael


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On 2014-08-19 14:01, Brian Trammell wrote:

<snip>

> M18: Submit to the IESG an Experimental document specifying methods 
> for providing the Transport Services identified by the WG to 
> applications. How's that? Cheers, Brian 

Sounds good to me as well.

Cheers,
Anna




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I=92d be happier with rephrasing it slightly as:

M18: Submit an Experimental document to the IESG specifying one or more =
methods to provide applications with the Transport Services identified =
by the WG.

On 19 Aug 2014, at 16:27, Anna Brunstrom <anna.brunstrom@kau.se> wrote:

> On 2014-08-19 14:01, Brian Trammell wrote:
>=20
> <snip>
>=20
>> M18: Submit to the IESG an Experimental document specifying methods =
for providing the Transport Services identified by the WG to =
applications. How's that? Cheers, Brian=20
>=20
> Sounds good to me as well.
>=20
> Cheers,
> Anna
>=20
>=20
>=20
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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I agree.=0A=
________________________________________=0A=
From: Taps [taps-bounces@ietf.org] on behalf of Toby Moncaster [toby.moncas=
ter@cl.cam.ac.uk]=0A=
Sent: Tuesday, August 19, 2014 11:31 AM=0A=
To: Anna Brunstrom=0A=
Cc: taps@ietf.org=0A=
Subject: Re: [Taps] TAPS charter rev 20140818=0A=
=0A=
I=92d be happier with rephrasing it slightly as:=0A=
=0A=
M18: Submit an Experimental document to the IESG specifying one or more met=
hods to provide applications with the Transport Services identified by the =
WG.=0A=
=0A=
On 19 Aug 2014, at 16:27, Anna Brunstrom <anna.brunstrom@kau.se> wrote:=0A=
=0A=
> On 2014-08-19 14:01, Brian Trammell wrote:=0A=
>=0A=
> <snip>=0A=
>=0A=
>> M18: Submit to the IESG an Experimental document specifying methods for =
providing the Transport Services identified by the WG to applications. How'=
s that? Cheers, Brian=0A=
>=0A=
> Sounds good to me as well.=0A=
>=0A=
> Cheers,=0A=
> Anna=0A=
>=0A=
>=0A=
>=0A=
> _______________________________________________=0A=
> Taps mailing list=0A=
> Taps@ietf.org=0A=
> https://www.ietf.org/mailman/listinfo/taps=0A=
=0A=
_______________________________________________=0A=
Taps mailing list=0A=
Taps@ietf.org=0A=
https://www.ietf.org/mailman/listinfo/taps=0A=


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Subject: Re: [Taps] TAPS charter rev 20140818
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hi Toby,

On 19 Aug 2014, at 17:31, Toby Moncaster <toby.moncaster@cl.cam.ac.uk> =
wrote:

>=20
> I=92d be happier with rephrasing it slightly as:
>=20
> M18: Submit an Experimental document to the IESG specifying one or =
more methods to provide applications with the Transport Services =
identified by the WG.

Works for me.

Cheers,

Brian

> On 19 Aug 2014, at 16:27, Anna Brunstrom <anna.brunstrom@kau.se> =
wrote:
>=20
>> On 2014-08-19 14:01, Brian Trammell wrote:
>>=20
>> <snip>
>>=20
>>> M18: Submit to the IESG an Experimental document specifying methods =
for providing the Transport Services identified by the WG to =
applications. How's that? Cheers, Brian=20
>>=20
>> Sounds good to me as well.
>>=20
>> Cheers,
>> Anna
>>=20
>>=20
>>=20
>> _______________________________________________
>> Taps mailing list
>> Taps@ietf.org
>> https://www.ietf.org/mailman/listinfo/taps
>=20
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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+1.


Now, we can perhaps head on to the other charter changes related to this =
re-inserted milestone. I suggest the following undo's =3D> I mean going =
back from THIS VERSION to the PREVIOUS VERSION, which is the version =
that went to IETF review:

THIS VERSION:
2) Note that not all capabilities of IETF Transport protocols need to be =
exposed as Transport Services. This document will recommend the minimal =
set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20

PREVIOUS VERSION:
2) Note that not all capabilities of IETF Transport protocols need to be =
exposed as Transport Services. This document will recommend the minimal =
set of Transport Services that support mechanisms must provide (such as =
those in work item 3). The resulting document will also provide guidance =
on making a choice among available mechanisms and protocols to obtain a =
certain Transport Service.=20


a bit below, for item 3 (last sentence):

THIS VERSION:
The associated milestone will be scheduled and work on this document =
will begin when the TAPS Transport Services have been specified.=20

PREVIOUS VERSION:
Work on this document will begin when the TAPS Transport Services have =
been specified.=20



Not relevant to this particular discussion, but a suggested minor change =
nevertheless, for the out-of-scope list:

THIS VERSION:
- Extension, modification, or creation of existing IETF transport =
protocols=20

PREVIOUS VERSION:
- Extension, modification, or creation of transport protocols=20


The only problem I have here is that "the creation of existing.... =
protocols" does not sound very logical. I suggest to remove "existing".


Cheers,
Michael



On 19. aug. 2014, at 17:32, Brian Trammell wrote:

> hi Toby,
>=20
> On 19 Aug 2014, at 17:31, Toby Moncaster <toby.moncaster@cl.cam.ac.uk> =
wrote:
>=20
>>=20
>> I=92d be happier with rephrasing it slightly as:
>>=20
>> M18: Submit an Experimental document to the IESG specifying one or =
more methods to provide applications with the Transport Services =
identified by the WG.
>=20
> Works for me.
>=20
> Cheers,
>=20
> Brian
>=20
>> On 19 Aug 2014, at 16:27, Anna Brunstrom <anna.brunstrom@kau.se> =
wrote:
>>=20
>>> On 2014-08-19 14:01, Brian Trammell wrote:
>>>=20
>>> <snip>
>>>=20
>>>> M18: Submit to the IESG an Experimental document specifying methods =
for providing the Transport Services identified by the WG to =
applications. How's that? Cheers, Brian=20
>>>=20
>>> Sounds good to me as well.
>>>=20
>>> Cheers,
>>> Anna
>>>=20
>>>=20
>>>=20
>>> _______________________________________________
>>> Taps mailing list
>>> Taps@ietf.org
>>> https://www.ietf.org/mailman/listinfo/taps
>>=20
>> _______________________________________________
>> Taps mailing list
>> Taps@ietf.org
>> https://www.ietf.org/mailman/listinfo/taps
>=20
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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On 19 Aug 2014, at 17:00, Michael Welzl <michawe@ifi.uio.no> wrote:

> +1.
>=20
>=20
> Now, we can perhaps head on to the other charter changes related to =
this re-inserted milestone. I suggest the following undo's =3D> I mean =
going back from THIS VERSION to the PREVIOUS VERSION, which is the =
version that went to IETF review:
>=20
> THIS VERSION:
> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20
>=20
> PREVIOUS VERSION:
> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services that support mechanisms must provide =
(such as those in work item 3). The resulting document will also provide =
guidance on making a choice among available mechanisms and protocols to =
obtain a certain Transport Service.=20
>=20

I actually now think the previous version was a little clumsy. Also it =
sounds really weird to start this item with a note=85 This makes me =
suspect this item has been over-edited :)

Should we in fact say:

2) Define the minimal set of Transport Services that must be provided by =
mechanisms such as those to be specified in work item 3. The resulting =
document will give guidance on choosing from available mechanisms and =
protocols to provide a given Transport Service. Note that not all the =
capabilities of IETF Transport protocols need to be exposed as Transport =
Services.


>=20
> a bit below, for item 3 (last sentence):
>=20
> THIS VERSION:
> The associated milestone will be scheduled and work on this document =
will begin when the TAPS Transport Services have been specified.=20
>=20
> PREVIOUS VERSION:
> Work on this document will begin when the TAPS Transport Services have =
been specified.=20

Agreed since we will already have the milestone scheduled

>=20
>=20
>=20
> Not relevant to this particular discussion, but a suggested minor =
change nevertheless, for the out-of-scope list:
>=20
> THIS VERSION:
> - Extension, modification, or creation of existing IETF transport =
protocols=20
>=20
> PREVIOUS VERSION:
> - Extension, modification, or creation of transport protocols=20
>=20
>=20
> The only problem I have here is that "the creation of existing.... =
protocols" does not sound very logical. I suggest to remove "existing=94.

I=92m guessing this was actually trying to cover 2 things: The creation =
of new protocols and the extension or modification of existing =
protocols.

>=20
>=20
> Cheers,
> Michael
>=20
>=20
>=20
> On 19. aug. 2014, at 17:32, Brian Trammell wrote:
>=20
>> hi Toby,
>>=20
>> On 19 Aug 2014, at 17:31, Toby Moncaster =
<toby.moncaster@cl.cam.ac.uk> wrote:
>>=20
>>>=20
>>> I=92d be happier with rephrasing it slightly as:
>>>=20
>>> M18: Submit an Experimental document to the IESG specifying one or =
more methods to provide applications with the Transport Services =
identified by the WG.
>>=20
>> Works for me.
>>=20
>> Cheers,
>>=20
>> Brian
>>=20
>>> On 19 Aug 2014, at 16:27, Anna Brunstrom <anna.brunstrom@kau.se> =
wrote:
>>>=20
>>>> On 2014-08-19 14:01, Brian Trammell wrote:
>>>>=20
>>>> <snip>
>>>>=20
>>>>> M18: Submit to the IESG an Experimental document specifying =
methods for providing the Transport Services identified by the WG to =
applications. How's that? Cheers, Brian=20
>>>>=20
>>>> Sounds good to me as well.
>>>>=20
>>>> Cheers,
>>>> Anna
>>>>=20
>>>>=20
>>>>=20
>>>> _______________________________________________
>>>> Taps mailing list
>>>> Taps@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/taps
>>>=20
>>> _______________________________________________
>>> Taps mailing list
>>> Taps@ietf.org
>>> https://www.ietf.org/mailman/listinfo/taps
>>=20
>> _______________________________________________
>> Taps mailing list
>> Taps@ietf.org
>> https://www.ietf.org/mailman/listinfo/taps
>=20
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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From: Michael Welzl <michawe@ifi.uio.no>
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Date: Tue, 19 Aug 2014 21:51:11 +0200
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References: <CALiXHozefTPLWKhXxw42nzy3j89cFM1a74z-jgQdUgFp+PWCaw@mail.gmail.com> <D10404C9-AB90-4C73-9244-F681A2564510@trammell.ch> <FC6D0B0A-D764-42DC-90A9-5D157F924610@ifi.uio.no> <BCDE94D2-BACE-4075-A23B-B237767F45A7@trammell.ch> <E2E8F277-4190-4922-A5E5-C2CB60C34A85@ifi.uio.no> <59E75860-5639-442C-A8A7-BFF9851B0267@trammell.ch> <53F36CF0.3080202@kau.se> <626127AC-E837-4F89-B09B-6F6BD8ADEAD9@cl.cam.ac.uk> <6B55C077-D987-42F3-BDC2-3887B758E024@trammell.ch> <CCCA6B8F-BF58-429F-941B-9A45D0C490BF@ifi.uio.no> <9331EBBD-A2CB-4B57-8AE5-8D5EED7667C2@cl.cam.ac.uk>
To: Toby Moncaster <toby.moncaster@cl.cam.ac.uk>
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Archived-At: http://mailarchive.ietf.org/arch/msg/taps/l2NID9jNaJWzt-JwbNgtO5DVzKo
Cc: taps@ietf.org
Subject: Re: [Taps] TAPS charter rev 20140818
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On 19. aug. 2014, at 18:13, Toby Moncaster <toby.moncaster@cl.cam.ac.uk> =
wrote:

>=20
> On 19 Aug 2014, at 17:00, Michael Welzl <michawe@ifi.uio.no> wrote:
>=20
>> +1.
>>=20
>>=20
>> Now, we can perhaps head on to the other charter changes related to =
this re-inserted milestone. I suggest the following undo's =3D> I mean =
going back from THIS VERSION to the PREVIOUS VERSION, which is the =
version that went to IETF review:
>>=20
>> THIS VERSION:
>> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20
>>=20
>> PREVIOUS VERSION:
>> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services that support mechanisms must provide =
(such as those in work item 3). The resulting document will also provide =
guidance on making a choice among available mechanisms and protocols to =
obtain a certain Transport Service.=20
>>=20
>=20
> I actually now think the previous version was a little clumsy. Also it =
sounds really weird to start this item with a note=85 This makes me =
suspect this item has been over-edited :)
>=20
> Should we in fact say:
>=20
> 2) Define the minimal set of Transport Services that must be provided =
by mechanisms such as those to be specified in work item 3. The =
resulting document will give guidance on choosing from available =
mechanisms and protocols to provide a given Transport Service. Note that =
not all the capabilities of IETF Transport protocols need to be exposed =
as Transport Services.

I agree, much better, and it's not a semantic change, just language.


>> a bit below, for item 3 (last sentence):
>>=20
>> THIS VERSION:
>> The associated milestone will be scheduled and work on this document =
will begin when the TAPS Transport Services have been specified.=20
>>=20
>> PREVIOUS VERSION:
>> Work on this document will begin when the TAPS Transport Services =
have been specified.=20
>=20
> Agreed since we will already have the milestone scheduled
>=20
>>=20
>>=20
>>=20
>> Not relevant to this particular discussion, but a suggested minor =
change nevertheless, for the out-of-scope list:
>>=20
>> THIS VERSION:
>> - Extension, modification, or creation of existing IETF transport =
protocols=20
>>=20
>> PREVIOUS VERSION:
>> - Extension, modification, or creation of transport protocols=20
>>=20
>>=20
>> The only problem I have here is that "the creation of existing.... =
protocols" does not sound very logical. I suggest to remove "existing=94.
>=20
> I=92m guessing this was actually trying to cover 2 things: The =
creation of new protocols and the extension or modification of existing =
protocols.

Yes, sure - but my point is that the word "existing" doesn't need to be =
there to convey that complete message.

Cheers,
Michael


--Apple-Mail=_767BF4C5-36E3-45F4-BEE1-5A187C424785
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br><div><div>On 19. aug. 2014, at 18:13, Toby =
Moncaster &lt;<a =
href=3D"mailto:toby.moncaster@cl.cam.ac.uk">toby.moncaster@cl.cam.ac.uk</a=
>&gt; wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;"><br>On 19 Aug 2014, at 17:00, =
Michael Welzl &lt;<a =
href=3D"mailto:michawe@ifi.uio.no">michawe@ifi.uio.no</a>&gt; =
wrote:<br><br><blockquote type=3D"cite">+1.<br><br><br>Now, we can =
perhaps head on to the other charter changes related to this re-inserted =
milestone. I suggest the following undo's =3D&gt; I mean going back from =
THIS VERSION to the PREVIOUS VERSION, which is the version that went to =
IETF review:<br><br>THIS VERSION:<br>2) Note that not all capabilities =
of IETF Transport protocols need to be exposed as Transport Services. =
This document will recommend the minimal set of Transport Services for =
inclusion in the abstract API. The resulting document will also provide =
guidance on making a choice among available mechanisms and protocols to =
obtain a certain Transport Service.<span =
class=3D"Apple-converted-space">&nbsp;</span><br><br>PREVIOUS =
VERSION:<br>2) Note that not all capabilities of IETF Transport =
protocols need to be exposed as Transport Services. This document will =
recommend the minimal set of Transport Services that support mechanisms =
must provide (such as those in work item 3). The resulting document will =
also provide guidance on making a choice among available mechanisms and =
protocols to obtain a certain Transport Service.<span =
class=3D"Apple-converted-space">&nbsp;</span><br><br></blockquote><br>I =
actually now think the previous version was a little clumsy. Also it =
sounds really weird to start this item with a note=85 This makes me =
suspect this item has been over-edited :)<br><br>Should we in fact =
say:<br><br>2) Define the minimal set of Transport Services that must be =
provided by mechanisms such as those to be specified in work item 3. The =
resulting document will give guidance on choosing from available =
mechanisms and protocols to provide a given Transport Service. Note that =
not all the capabilities of IETF Transport protocols need to be exposed =
as Transport Services.<br></div></blockquote><div><br></div>I agree, =
much better, and it's not a semantic change, just =
language.</div><div><br></div><div><br><blockquote type=3D"cite"><div =
style=3D"font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><blockquote type=3D"cite">a bit below, =
for item 3 (last sentence):<br><br>THIS VERSION:<br>The associated =
milestone will be scheduled and work on this document will begin when =
the TAPS Transport Services have been specified.<span =
class=3D"Apple-converted-space">&nbsp;</span><br><br>PREVIOUS =
VERSION:<br>Work on this document will begin when the TAPS Transport =
Services have been specified.<span =
class=3D"Apple-converted-space">&nbsp;</span><br></blockquote><br>Agreed =
since we will already have the milestone scheduled<br><br><blockquote =
type=3D"cite"><br><br><br>Not relevant to this particular discussion, =
but a suggested minor change nevertheless, for the out-of-scope =
list:<br><br>THIS VERSION:<br>- Extension, modification, or creation of =
existing IETF transport protocols<span =
class=3D"Apple-converted-space">&nbsp;</span><br><br>PREVIOUS =
VERSION:<br>- Extension, modification, or creation of transport =
protocols<span =
class=3D"Apple-converted-space">&nbsp;</span><br><br><br>The only =
problem I have here is that "the creation of existing.... protocols" =
does not sound very logical. I suggest to remove =
"existing=94.<br></blockquote><br>I=92m guessing this was actually =
trying to cover 2 things: The creation of new protocols and the =
extension or modification of existing =
protocols.<br></div></blockquote><div><br></div>Yes, sure - but my point =
is that the word "existing" doesn't need to be there to convey that =
complete =
message.</div><div><br></div><div>Cheers,</div><div>Michael</div><div><br>=
</div></body></html>=

--Apple-Mail=_767BF4C5-36E3-45F4-BEE1-5A187C424785--


From nobody Tue Aug 19 20:30:16 2014
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From: Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>
To: "taps@ietf.org" <taps@ietf.org>
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Subject: [Taps] So, catching back up on the charter
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If I might make a couple of observations, and ask a question ...

Obs: document status:

This is actually not as nailed down as you might think. The IESG can, and
sometimes does, discuss the proper status for a document as late as IESG
Evaluation (I've been involved in one of those conversations today for a
document on this Thursday's telechat, although that doesn't happen every
telechat). It's good to start out with a goal in mind, but you actually
have some flexibility.

Obs: milestones in general:

Some folks might understand this better than I did when I became an AD, so
I apologize if I'm boring anyone, but the food chain works like this:

The charter text, and this doesn't include the milestones, is a matter for
the IESG, in consultation with the community. Rechartering goes back to the
IESG and to the community.

The milestone text is a matter for the AD, in consultation with the working
group. Additions, changes and deletions that are within scope of the agreed
charter don't go back to the IESG. We often stick document status
in milestones, and that doesn't go back to the IESG, either.

Milestone dates are a matter for the chairs, in consultation with the
working group. An AD might have opinions about how fast a working group
should be moving, but we don't approve milestone date changes.

The high-order bit is, you really want work described in the charter text
unless you want to go back to the IESG, but a working group can
add/change/remove milestones for work that's described in the charter at
whatever time seems appropriate. So, please look most carefully at the
non-milestone charter text, because that's what's most difficult to change.

I would expect TAPS to add milestones when TAPS is ready to adopt an
individual draft (the draft name is one of the milestone attributes), and
work on it as a group. After that, the draft needs to reflect the editor's
understanding of what the working group thinks.

Q: So, my question:

How important is it for the working group to begin work on the third
deliverable immediately?

Thanks,

Spencer, as AD

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If I might make a couple of observations, and ask a question ...<div><br></=
div><div>Obs: document status:</div><div><br></div><div>This is actually no=
t as=C2=A0nailed down as you might think. The IESG can, and sometimes does,=
 discuss the proper status for a document as late as IESG Evaluation=C2=A0(=
I&#39;ve been involved in one of those conversations today for a document o=
n this Thursday&#39;s telechat, although that doesn&#39;t happen every tele=
chat). It&#39;s good to start out with a goal in mind, but you actually hav=
e some flexibility.</div>
<div><br></div><div>Obs: milestones in general:</div><div><br></div>Some fo=
lks might understand this better than I did when I became an AD, so I apolo=
gize if I&#39;m boring anyone, but the food chain works like this:<div>
<br></div><div>The charter text, and this doesn&#39;t include the milestone=
s, is=C2=A0a matter for the IESG, in consultation with the community. Recha=
rtering goes back to the IESG and to the community.</div><div><br></div><di=
v>
The milestone text is a matter for the AD, in consultation with the working=
 group. Additions, changes and deletions that are within scope of the agree=
d charter don&#39;t go back to the IESG. We often=C2=A0stick document statu=
s in=C2=A0milestones, and that doesn&#39;t go back to the IESG, either.</di=
v>
<div><br></div><div>Milestone dates are a matter for the chairs, in consult=
ation with the working group. An AD might have opinions about how fast a wo=
rking group should be moving, but we don&#39;t approve milestone date chang=
es.</div>
<div><br></div><div>The high-order bit is, you really want work described i=
n the charter text unless you want to go back to the IESG, but a working gr=
oup can add/change/remove milestones for work that&#39;s described in the c=
harter=C2=A0at whatever=C2=A0time seems appropriate. So, please look most c=
arefully at the non-milestone charter text, because that&#39;s what&#39;s m=
ost difficult to change.</div>
<div><br></div><div><div>I would expect TAPS to add=C2=A0milestones when TA=
PS is ready to adopt an individual=C2=A0draft (the draft name is one of the=
 milestone attributes), and work on it as a group. After that, the draft ne=
eds to reflect the editor&#39;s understanding of what the working group thi=
nks.</div>
</div><div><br></div><div>Q:=C2=A0So, my question:=C2=A0</div><div><br></di=
v><div>How important is it for the working group=C2=A0to begin work on the =
third deliverable immediately?</div><div><br></div><div>Thanks,</div><div><=
br></div><div>
Spencer, as AD</div>

--089e0158b6e8be68770501073833--


From nobody Wed Aug 20 00:15:46 2014
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Subject: Re: [Taps] So, catching back up on the charter
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Hi!

Below:

On 20. aug. 2014, at 05:30, Spencer Dawkins at IETF wrote:

> If I might make a couple of observations, and ask a question ...
>=20
> Obs: document status:
>=20
> This is actually not as nailed down as you might think. The IESG can, =
and sometimes does, discuss the proper status for a document as late as =
IESG Evaluation (I've been involved in one of those conversations today =
for a document on this Thursday's telechat, although that doesn't happen =
every telechat). It's good to start out with a goal in mind, but you =
actually have some flexibility.
>=20
> Obs: milestones in general:
>=20
> Some folks might understand this better than I did when I became an =
AD, so I apologize if I'm boring anyone, but the food chain works like =
this:
>=20
> The charter text, and this doesn't include the milestones, is a matter =
for the IESG, in consultation with the community. Rechartering goes back =
to the IESG and to the community.
>=20
> The milestone text is a matter for the AD, in consultation with the =
working group. Additions, changes and deletions that are within scope of =
the agreed charter don't go back to the IESG. We often stick document =
status in milestones, and that doesn't go back to the IESG, either.
>=20
> Milestone dates are a matter for the chairs, in consultation with the =
working group. An AD might have opinions about how fast a working group =
should be moving, but we don't approve milestone date changes.

Thanks a lot for all this information!


> The high-order bit is, you really want work described in the charter =
text unless you want to go back to the IESG, but a working group can =
add/change/remove milestones for work that's described in the charter at =
whatever time seems appropriate. So, please look most carefully at the =
non-milestone charter text, because that's what's most difficult to =
change.

There were some smaller changes to it in the last proposal that I =
suggested to undo in my previous email, because we do want to write that =
third document. Note that "undo" means "back to the version that was at =
IETF open review. I guess we should avoid semantic changes to that =
version unless we have very strong reasons.


> I would expect TAPS to add milestones when TAPS is ready to adopt an =
individual draft (the draft name is one of the milestone attributes), =
and work on it as a group. After that, the draft needs to reflect the =
editor's understanding of what the working group thinks.
>=20
> Q: So, my question:=20
>=20
> How important is it for the working group to begin work on the third =
deliverable immediately?

I can't speak to "immediately" - logically, that work follows the first =
two items. Some people may be eager to start some of this work straight =
away, perhaps - I really don't know, this is for others to answer.

What I think is important to members of this group is that there is a =
dedication there that this document will be written. What you say above =
about milestones reflects their "internal" meaning, but I think there is =
another side to this: as someone external who *might* be interested in =
contributing to TAPS, I go to the IETF web site, click on TAPS, see e.g. =
the first two milestones and think "ah, these two lists is all they =
really develop". The most interesting bit is missing - so it's a boring, =
possibily useless group and I don't get involved.

Flexibility regarding how services really are provided is a key feature =
of TAPS, so it's absolutely natural for that third item to be =
experimental - but if we don't document an example way of implementing =
this, we really just have an empty shell. Similarly, if we don't put the =
milestone there now, we have an obviously boring group. That would be a =
bit like defining what DiffServ services do for the application without =
even hinting at how they could be implemented.

That's how I see things, at least...

Cheers,
Michael


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Subject: Re: [Taps] So, catching back up on the charter
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--Apple-Mail=_5AA8B7BC-ED32-4337-9FA7-52C051747ADF
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First, apologies to the group for not explaining the reasoning for the =
changes in the last draft. =20

On Aug 20, 2014, at 3:15 AM, Michael Welzl <michawe@ifi.uio.no> wrote:

> On 20. aug. 2014, at 05:30, Spencer Dawkins at IETF wrote:
>=20
>>=20
>> The milestone text is a matter for the AD, in consultation with the =
working group. Additions, changes and deletions that are within scope of =
the agreed charter don't go back to the IESG. We often stick document =
status in milestones, and that doesn't go back to the IESG, either.
>>=20
>> Milestone dates are a matter for the chairs, in consultation with the =
working group. An AD might have opinions about how fast a working group =
should be moving, but we don't approve milestone date changes.
>=20
> Thanks a lot for all this information!

Connecting the dots a bit here to make things more explicit: the removal =
of the 3rd milestone was at Spencer=92s request and in response to =
repeated IAB guidance that work on the third deliverable was a possible =
distraction from completing the 1st two.  The AD & IESG are the 'work =
managers' for the IETF so their opinion counts on this topic.

>=20
>=20
>> The high-order bit is, you really want work described in the charter =
text unless you want to go back to the IESG, but a working group can =
add/change/remove milestones for work that's described in the charter at =
whatever time seems appropriate. So, please look most carefully at the =
non-milestone charter text, because that's what's most difficult to =
change.
>=20
> There were some smaller changes to it in the last proposal that I =
suggested to undo in my previous email, because we do want to write that =
third document. Note that "undo" means "back to the version that was at =
IETF open review. I guess we should avoid semantic changes to that =
version unless we have very strong reasons.

I=92ll address that in the relevant thread. Keep in mind that the =
charter is now being reviewed by folks outside the group so it is not =
surprising that there are new questions coming up (particularly about =
clarity).  My experience is that this broader review is often important =
for making explicit some implied context.  I=92ve tried to add detail in =
my changes but maybe I=92ve gotten it wrong.  If so, that=92s useful to =
getting us all on the same page.

>=20
>=20
>> I would expect TAPS to add milestones when TAPS is ready to adopt an =
individual draft (the draft name is one of the milestone attributes), =
and work on it as a group. After that, the draft needs to reflect the =
editor's understanding of what the working group thinks.
>>=20
>> Q: So, my question:=20
>>=20
>> How important is it for the working group to begin work on the third =
deliverable immediately?
>=20
> I can't speak to "immediately" - logically, that work follows the =
first two items. Some people may be eager to start some of this work =
straight away, perhaps - I really don't know, this is for others to =
answer.
>=20
> What I think is important to members of this group is that there is a =
dedication there that this document will be written. What you say above =
about milestones reflects their "internal" meaning, but I think there is =
another side to this: as someone external who *might* be interested in =
contributing to TAPS, I go to the IETF web site, click on TAPS, see e.g. =
the first two milestones and think "ah, these two lists is all they =
really develop". The most interesting bit is missing - so it's a boring, =
possibily useless group and I don't get involved.

The charter modification that included the description of the third doc =
without scheduling the milestone was intended to address just that =
point.  This is planned work but won=92t be scheduled yet.=20


>=20
> Flexibility regarding how services really are provided is a key =
feature of TAPS, so it's absolutely natural for that third item to be =
experimental - but if we don't document an example way of implementing =
this, we really just have an empty shell. Similarly, if we don't put the =
milestone there now, we have an obviously boring group. That would be a =
bit like defining what DiffServ services do for the application without =
even hinting at how they could be implemented.

I=92m a little concerned that =93flexibility=94, =93experimental=94, and =
=93interesting=94 are indicators that there=92s research to be done =
here.  And the IETF doesn=92t have a good track record for research in =
working groups.  (That is a role for the IRTF, as I=92m sure you know.)  =
Working groups seem to function best when there are one or more =
well-worked out proposals (or, better, running code) that the group can =
reconcile.  So, I can understand the concern about this being a =
distraction from the =91boring but useful=92 work.

=97aaron=

--Apple-Mail=_5AA8B7BC-ED32-4337-9FA7-52C051747ADF
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	charset=windows-1252

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">First, =
apologies to the group for not explaining the reasoning for the changes =
in the last draft. &nbsp;<br>
<br><div><div>On Aug 20, 2014, at 3:15 AM, Michael Welzl &lt;<a =
href=3D"mailto:michawe@ifi.uio.no">michawe@ifi.uio.no</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;">On 20. aug. 2014, at 05:30, =
Spencer Dawkins at IETF wrote:<br><br><blockquote type=3D"cite"><br>The =
milestone text is a matter for the AD, in consultation with the working =
group. Additions, changes and deletions that are within scope of the =
agreed charter don't go back to the IESG. We often stick document status =
in milestones, and that doesn't go back to the IESG, =
either.<br><br>Milestone dates are a matter for the chairs, in =
consultation with the working group. An AD might have opinions about how =
fast a working group should be moving, but we don't approve milestone =
date changes.<br></blockquote><br>Thanks a lot for all this =
information!<br></div></blockquote><div><br></div><div>Connecting the =
dots a bit here to make things more explicit: the removal of the 3rd =
milestone was at Spencer=92s request and in response to repeated IAB =
guidance that work on the third deliverable was a possible distraction =
from completing the 1st two. &nbsp;The AD &amp; IESG are the 'work =
managers' for the IETF so their opinion counts on this =
topic.</div><br><blockquote type=3D"cite"><div style=3D"font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br><br><blockquote type=3D"cite">The high-order bit is, you =
really want work described in the charter text unless you want to go =
back to the IESG, but a working group can add/change/remove milestones =
for work that's described in the charter at whatever time seems =
appropriate. So, please look most carefully at the non-milestone charter =
text, because that's what's most difficult to =
change.<br></blockquote><br>There were some smaller changes to it in the =
last proposal that I suggested to undo in my previous email, because we =
do want to write that third document. Note that "undo" means "back to =
the version that was at IETF open review. I guess we should avoid =
semantic changes to that version unless we have very strong =
reasons.<br></div></blockquote><div><br></div><div>I=92ll address that =
in the relevant thread. Keep in mind that the charter is now being =
reviewed by folks outside the group so it is not surprising that there =
are new questions coming up (particularly about clarity). &nbsp;My =
experience is that this broader review is often important for making =
explicit some implied context. &nbsp;I=92ve tried to add detail in my =
changes but maybe I=92ve gotten it wrong. &nbsp;If so, that=92s useful =
to getting us all on the same page.</div><br><blockquote =
type=3D"cite"><div style=3D"font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;"><br><br><blockquote type=3D"cite">I =
would expect TAPS to add milestones when TAPS is ready to adopt an =
individual draft (the draft name is one of the milestone attributes), =
and work on it as a group. After that, the draft needs to reflect the =
editor's understanding of what the working group thinks.<br><br>Q: So, =
my question:<span class=3D"Apple-converted-space">&nbsp;</span><br><br>How=
 important is it for the working group to begin work on the third =
deliverable immediately?<br></blockquote><br>I can't speak to =
"immediately" - logically, that work follows the first two items. Some =
people may be eager to start some of this work straight away, perhaps - =
I really don't know, this is for others to answer.<br><br>What I think =
is important to members of this group is that there is a dedication =
there that this document will be written. What you say above about =
milestones reflects their "internal" meaning, but I think there is =
another side to this: as someone external who *might* be interested in =
contributing to TAPS, I go to the IETF web site, click on TAPS, see e.g. =
the first two milestones and think "ah, these two lists is all they =
really develop". The most interesting bit is missing - so it's a boring, =
possibily useless group and I don't get =
involved.</div></blockquote><div><br></div><div>The charter modification =
that included the description of the third doc without scheduling the =
milestone was intended to address just that point. &nbsp;This is planned =
work but won=92t be scheduled =
yet.&nbsp;</div><div><br></div><br><blockquote type=3D"cite"><div =
style=3D"font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;"><br>Flexibility regarding how services =
really are provided is a key feature of TAPS, so it's absolutely natural =
for that third item to be experimental - but if we don't document an =
example way of implementing this, we really just have an empty shell. =
Similarly, if we don't put the milestone there now, we have an obviously =
boring group. That would be a bit like defining what DiffServ services =
do for the application without even hinting at how they could be =
implemented.</div></blockquote><div><br></div><div>I=92m a little =
concerned that =93flexibility=94, =93experimental=94, and =93interesting=94=
 are indicators that there=92s research to be done here. &nbsp;And the =
IETF doesn=92t have a good track record for research in working groups. =
&nbsp;(That is a role for the IRTF, as I=92m sure you know.) =
&nbsp;Working groups seem to function best when there are one or more =
well-worked out proposals (or, better, running code) that the group can =
reconcile. &nbsp;So, I can understand the concern about this being a =
distraction from the =91boring but useful=92 =
work.</div><div><br></div><div>=97aaron</div></div></body></html>=

--Apple-Mail=_5AA8B7BC-ED32-4337-9FA7-52C051747ADF--


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From: Marie-Jose Montpetit <mariejo@mit.edu>
To: Aaron Falk <aaron.falk@gmail.com>, Michael Welzl <michawe@ifi.uio.no>
Thread-Topic: [Taps] So, catching back up on the charter
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Cc: Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>, "taps@ietf.org" <taps@ietf.org>
Subject: Re: [Taps] So, catching back up on the charter
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--_000_20940E50965B3847B3E4EB3E93EF8EBA29DFBF3COC11expo28excha_
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I may talk for myself but yes running code is one reason I am interested in=
 this. I have worked and still am working on architectures for this. But th=
e proof is in the pudding. As long as we cannot show a approach that works,=
 scales and is reliable we are doing research not engineering. And after 15=
 years of research I am ready for engineering :-)

/mjm
________________________________
From: Taps [taps-bounces@ietf.org] on behalf of Aaron Falk [aaron.falk@gmai=
l.com]
Sent: Wednesday, August 20, 2014 10:16 AM
To: Michael Welzl
Cc: Spencer Dawkins at IETF; taps@ietf.org
Subject: Re: [Taps] So, catching back up on the charter

First, apologies to the group for not explaining the reasoning for the chan=
ges in the last draft.

On Aug 20, 2014, at 3:15 AM, Michael Welzl <michawe@ifi.uio.no<mailto:micha=
we@ifi.uio.no>> wrote:

On 20. aug. 2014, at 05:30, Spencer Dawkins at IETF wrote:


The milestone text is a matter for the AD, in consultation with the working=
 group. Additions, changes and deletions that are within scope of the agree=
d charter don't go back to the IESG. We often stick document status in mile=
stones, and that doesn't go back to the IESG, either.

Milestone dates are a matter for the chairs, in consultation with the worki=
ng group. An AD might have opinions about how fast a working group should b=
e moving, but we don't approve milestone date changes.

Thanks a lot for all this information!

Connecting the dots a bit here to make things more explicit: the removal of=
 the 3rd milestone was at Spencer=92s request and in response to repeated I=
AB guidance that work on the third deliverable was a possible distraction f=
rom completing the 1st two.  The AD & IESG are the 'work managers' for the =
IETF so their opinion counts on this topic.



The high-order bit is, you really want work described in the charter text u=
nless you want to go back to the IESG, but a working group can add/change/r=
emove milestones for work that's described in the charter at whatever time =
seems appropriate. So, please look most carefully at the non-milestone char=
ter text, because that's what's most difficult to change.

There were some smaller changes to it in the last proposal that I suggested=
 to undo in my previous email, because we do want to write that third docum=
ent. Note that "undo" means "back to the version that was at IETF open revi=
ew. I guess we should avoid semantic changes to that version unless we have=
 very strong reasons.

I=92ll address that in the relevant thread. Keep in mind that the charter i=
s now being reviewed by folks outside the group so it is not surprising tha=
t there are new questions coming up (particularly about clarity).  My exper=
ience is that this broader review is often important for making explicit so=
me implied context.  I=92ve tried to add detail in my changes but maybe I=
=92ve gotten it wrong.  If so, that=92s useful to getting us all on the sam=
e page.



I would expect TAPS to add milestones when TAPS is ready to adopt an indivi=
dual draft (the draft name is one of the milestone attributes), and work on=
 it as a group. After that, the draft needs to reflect the editor's underst=
anding of what the working group thinks.

Q: So, my question:

How important is it for the working group to begin work on the third delive=
rable immediately?

I can't speak to "immediately" - logically, that work follows the first two=
 items. Some people may be eager to start some of this work straight away, =
perhaps - I really don't know, this is for others to answer.

What I think is important to members of this group is that there is a dedic=
ation there that this document will be written. What you say above about mi=
lestones reflects their "internal" meaning, but I think there is another si=
de to this: as someone external who *might* be interested in contributing t=
o TAPS, I go to the IETF web site, click on TAPS, see e.g. the first two mi=
lestones and think "ah, these two lists is all they really develop". The mo=
st interesting bit is missing - so it's a boring, possibily useless group a=
nd I don't get involved.

The charter modification that included the description of the third doc wit=
hout scheduling the milestone was intended to address just that point.  Thi=
s is planned work but won=92t be scheduled yet.



Flexibility regarding how services really are provided is a key feature of =
TAPS, so it's absolutely natural for that third item to be experimental - b=
ut if we don't document an example way of implementing this, we really just=
 have an empty shell. Similarly, if we don't put the milestone there now, w=
e have an obviously boring group. That would be a bit like defining what Di=
ffServ services do for the application without even hinting at how they cou=
ld be implemented.

I=92m a little concerned that =93flexibility=94, =93experimental=94, and =
=93interesting=94 are indicators that there=92s research to be done here.  =
And the IETF doesn=92t have a good track record for research in working gro=
ups.  (That is a role for the IRTF, as I=92m sure you know.)  Working group=
s seem to function best when there are one or more well-worked out proposal=
s (or, better, running code) that the group can reconcile.  So, I can under=
stand the concern about this being a distraction from the =91boring but use=
ful=92 work.

=97aaron

--_000_20940E50965B3847B3E4EB3E93EF8EBA29DFBF3COC11expo28excha_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<style type=3D"text/css" id=3D"owaParaStyle"></style><style type=3D"text/cs=
s"></style><style type=3D"text/css"></style>
</head>
<body style=3D"word-wrap:break-word" fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">I may talk for myself but yes running code is one reason I am intere=
sted in this. I have worked and still am working on architectures for this.=
 But the proof is in the pudding.
 As long as we cannot show a approach that works, scales and is reliable we=
 are doing research not engineering. And after 15 years of research I am re=
ady for engineering :-)
<div><br>
</div>
<div>/mjm<br>
<div style=3D"font-family: Times New Roman; color: #000000; font-size: 16px=
">
<hr tabindex=3D"-1">
<div id=3D"divRpF501573" style=3D"direction: ltr;"><font face=3D"Tahoma" si=
ze=3D"2" color=3D"#000000"><b>From:</b> Taps [taps-bounces@ietf.org] on beh=
alf of Aaron Falk [aaron.falk@gmail.com]<br>
<b>Sent:</b> Wednesday, August 20, 2014 10:16 AM<br>
<b>To:</b> Michael Welzl<br>
<b>Cc:</b> Spencer Dawkins at IETF; taps@ietf.org<br>
<b>Subject:</b> Re: [Taps] So, catching back up on the charter<br>
</font><br>
</div>
<div></div>
<div>First, apologies to the group for not explaining the reasoning for the=
 changes in the last draft. &nbsp;<br>
<br>
<div>
<div>On Aug 20, 2014, at 3:15 AM, Michael Welzl &lt;<a href=3D"mailto:micha=
we@ifi.uio.no" target=3D"_blank">michawe@ifi.uio.no</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<blockquote type=3D"cite">
<div style=3D"font-size:12px; font-style:normal; font-variant:normal; font-=
weight:normal; letter-spacing:normal; line-height:normal; orphans:auto; tex=
t-align:start; text-indent:0px; text-transform:none; white-space:normal; wi=
dows:auto; word-spacing:0px">
On 20. aug. 2014, at 05:30, Spencer Dawkins at IETF wrote:<br>
<br>
<blockquote type=3D"cite"><br>
The milestone text is a matter for the AD, in consultation with the working=
 group. Additions, changes and deletions that are within scope of the agree=
d charter don't go back to the IESG. We often stick document status in mile=
stones, and that doesn't go back
 to the IESG, either.<br>
<br>
Milestone dates are a matter for the chairs, in consultation with the worki=
ng group. An AD might have opinions about how fast a working group should b=
e moving, but we don't approve milestone date changes.<br>
</blockquote>
<br>
Thanks a lot for all this information!<br>
</div>
</blockquote>
<div><br>
</div>
<div>Connecting the dots a bit here to make things more explicit: the remov=
al of the 3rd milestone was at Spencer=92s request and in response to repea=
ted IAB guidance that work on the third deliverable was a possible distract=
ion from completing the 1st two. &nbsp;The
 AD &amp; IESG are the 'work managers' for the IETF so their opinion counts=
 on this topic.</div>
<br>
<blockquote type=3D"cite">
<div style=3D"font-size:12px; font-style:normal; font-variant:normal; font-=
weight:normal; letter-spacing:normal; line-height:normal; orphans:auto; tex=
t-align:start; text-indent:0px; text-transform:none; white-space:normal; wi=
dows:auto; word-spacing:0px">
<br>
<br>
<blockquote type=3D"cite">The high-order bit is, you really want work descr=
ibed in the charter text unless you want to go back to the IESG, but a work=
ing group can add/change/remove milestones for work that's described in the=
 charter at whatever time seems appropriate.
 So, please look most carefully at the non-milestone charter text, because =
that's what's most difficult to change.<br>
</blockquote>
<br>
There were some smaller changes to it in the last proposal that I suggested=
 to undo in my previous email, because we do want to write that third docum=
ent. Note that &quot;undo&quot; means &quot;back to the version that was at=
 IETF open review. I guess we should avoid semantic
 changes to that version unless we have very strong reasons.<br>
</div>
</blockquote>
<div><br>
</div>
<div>I=92ll address that in the relevant thread. Keep in mind that the char=
ter is now being reviewed by folks outside the group so it is not surprisin=
g that there are new questions coming up (particularly about clarity). &nbs=
p;My experience is that this broader review
 is often important for making explicit some implied context. &nbsp;I=92ve =
tried to add detail in my changes but maybe I=92ve gotten it wrong. &nbsp;I=
f so, that=92s useful to getting us all on the same page.</div>
<br>
<blockquote type=3D"cite">
<div style=3D"font-size:12px; font-style:normal; font-variant:normal; font-=
weight:normal; letter-spacing:normal; line-height:normal; orphans:auto; tex=
t-align:start; text-indent:0px; text-transform:none; white-space:normal; wi=
dows:auto; word-spacing:0px">
<br>
<br>
<blockquote type=3D"cite">I would expect TAPS to add milestones when TAPS i=
s ready to adopt an individual draft (the draft name is one of the mileston=
e attributes), and work on it as a group. After that, the draft needs to re=
flect the editor's understanding of
 what the working group thinks.<br>
<br>
Q: So, my question:<span class=3D"Apple-converted-space">&nbsp;</span><br>
<br>
How important is it for the working group to begin work on the third delive=
rable immediately?<br>
</blockquote>
<br>
I can't speak to &quot;immediately&quot; - logically, that work follows the=
 first two items. Some people may be eager to start some of this work strai=
ght away, perhaps - I really don't know, this is for others to answer.<br>
<br>
What I think is important to members of this group is that there is a dedic=
ation there that this document will be written. What you say above about mi=
lestones reflects their &quot;internal&quot; meaning, but I think there is =
another side to this: as someone external
 who *might* be interested in contributing to TAPS, I go to the IETF web si=
te, click on TAPS, see e.g. the first two milestones and think &quot;ah, th=
ese two lists is all they really develop&quot;. The most interesting bit is=
 missing - so it's a boring, possibily useless
 group and I don't get involved.</div>
</blockquote>
<div><br>
</div>
<div>The charter modification that included the description of the third do=
c without scheduling the milestone was intended to address just that point.=
 &nbsp;This is planned work but won=92t be scheduled yet.&nbsp;</div>
<div><br>
</div>
<br>
<blockquote type=3D"cite">
<div style=3D"font-size:12px; font-style:normal; font-variant:normal; font-=
weight:normal; letter-spacing:normal; line-height:normal; orphans:auto; tex=
t-align:start; text-indent:0px; text-transform:none; white-space:normal; wi=
dows:auto; word-spacing:0px">
<br>
Flexibility regarding how services really are provided is a key feature of =
TAPS, so it's absolutely natural for that third item to be experimental - b=
ut if we don't document an example way of implementing this, we really just=
 have an empty shell. Similarly,
 if we don't put the milestone there now, we have an obviously boring group=
. That would be a bit like defining what DiffServ services do for the appli=
cation without even hinting at how they could be implemented.</div>
</blockquote>
<div><br>
</div>
<div>I=92m a little concerned that =93flexibility=94, =93experimental=94, a=
nd =93interesting=94 are indicators that there=92s research to be done here=
. &nbsp;And the IETF doesn=92t have a good track record for research in wor=
king groups. &nbsp;(That is a role for the IRTF, as I=92m sure
 you know.) &nbsp;Working groups seem to function best when there are one o=
r more well-worked out proposals (or, better, running code) that the group =
can reconcile. &nbsp;So, I can understand the concern about this being a di=
straction from the =91boring but useful=92 work.</div>
<div><br>
</div>
<div>=97aaron</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_20940E50965B3847B3E4EB3E93EF8EBA29DFBF3COC11expo28excha_--


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From: Aaron Falk <aaron.falk@gmail.com>
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Subject: Re: [Taps] TAPS charter rev 20140818
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We have a problem that folks who have not been part of the discussion =
from the beginning (like myself) need additional clarity when talking =
about =93support mechanisms=94.  I=92ve tried to add some in the =
descriptions of docs 2 and 3 but apparently it needs refinement.  The =
current charter says:

> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20

Some folks on the list have proposed the following alternative:

>> 2) Define the minimal set of Transport Services that must be provided =
by mechanisms such as those to be specified in work item 3. The =
resulting document will give guidance on choosing from available =
mechanisms and protocols to provide a given Transport Service. Note that =
not all the capabilities of IETF Transport protocols need to be exposed =
as Transport Services.

The problem here is that we haven=92t described what work item 3 is.  =
I=92d prefer a statement that stands on its own. If you don=92t like my =
text above, please propose something you like better.


In the third doc I tried to be a little more concrete about what a =
=93support mechanism=94 is:

> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20


Trying to piece an alternate phrasing from the thread I get:

>> 3) Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services and defining an experiment to evaluate =
such interfaces for incremental deployability.  The associated milestone =
will be scheduled and work on this document will begin when the TAPS =
Transport Services have been specified.=20

This seems less concrete to me.  I like =93select and engage protocols=94 =
but I=92d like to hear more input from the group.

=97aaron=

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><div>We have a problem that folks who have not been =
part of the discussion from the beginning (like myself) need additional =
clarity when talking about =93support mechanisms=94. &nbsp;I=92ve tried =
to add some in the descriptions of docs 2 and 3 but apparently it needs =
refinement. &nbsp;The current charter =
says:</div><div><br></div><div><div></div><blockquote =
type=3D"cite"><div><font face=3D"courier new, monospace">2) Note that =
not all capabilities of IETF Transport protocols need to be exposed as =
Transport Services. This document will recommend the minimal set of =
Transport Services for inclusion in the abstract API. The resulting =
document will also provide guidance on making a choice among available =
mechanisms and protocols to obtain a certain Transport =
Service.&nbsp;</font></div></blockquote><div><br></div><div>Some folks =
on the list have proposed the following =
alternative:</div><div><br></div><div><blockquote =
type=3D"cite"><blockquote type=3D"cite">2) Define the minimal set of =
Transport Services that must be provided by mechanisms such as those to =
be specified in work item 3. The resulting document will give guidance =
on choosing from available mechanisms and protocols to provide a given =
Transport Service. Note that not all the capabilities of IETF Transport =
protocols need to be exposed as Transport =
Services.</blockquote></blockquote><br></div><div>The problem here is =
that we haven=92t described what work item 3 is. &nbsp;I=92d prefer a =
statement that stands on its own. If you don=92t like my text above, =
please propose something you like =
better.</div><div><br></div><div><br></div><div>In the third doc I tried =
to be a little more concrete about what a =93support mechanism=94 =
is:</div><div><br></div><blockquote type=3D"cite"><div><span =
style=3D"font-family: 'courier new', monospace;">3) Specify experimental =
support mechanisms to provide the Transport Services identified in work =
item 2. This document will explain how to select and engage an =
appropriate protocol and how to discover which protocols are available =
for a given connection. Further, it will provide a basis for incremental =
deployment. The associated milestone will be scheduled and work on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</span></div></blockquote></div><div><br></div><div>Trying=
 to piece an alternate phrasing from the thread I =
get:</div><div><br></div><div><blockquote type=3D"cite"><blockquote =
type=3D"cite">3) Submit to the IESG an Experimental document =
exploring&nbsp;abstract interfaces to Transport Services and defining an =
experiment to evaluate such interfaces for incremental deployability. =
&nbsp;The associated milestone will be scheduled and work&nbsp;on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</blockquote></blockquote><br></div><div>This seems less =
concrete to me. &nbsp;I like =93select and engage protocols=94 but I=92d =
like to hear more input from the =
group.</div><div><br></div><div>=97aaron</div></body></html>=

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References: <CAKKJt-c+oTCkJ=9fZ8=Sv-o1i7kXT0_9OdFrx=GAJFkRxyFY2g@mail.gmail.com> <D4C5EF65-5765-48AF-999F-DE990FAF4BAC@ifi.uio.no>, <1ED82827-FA4A-4630-91BA-8697C3402C23@gmail.com> <20940E50965B3847B3E4EB3E93EF8EBA29DFBF3C@OC11expo28.exchange.mit.edu>
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Cc: Aaron Falk <aaron.falk@gmail.com>, Spencer Dawkins <spencerdawkins.ietf@gmail.com>, "taps@ietf.org" <taps@ietf.org>
Subject: Re: [Taps] So, catching back up on the charter
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On 20. aug. 2014, at 16:46, Marie-Jose Montpetit <mariejo@mit.edu> =
wrote:

> I may talk for myself but yes running code is one reason I am =
interested in this. I have worked and still am working on architectures =
for this. But the proof is in the pudding. As long as we cannot show a =
approach that works, scales and is reliable we are doing research not =
engineering. And after 15 years of research I am ready for engineering =
:-)
>=20
> /mjm
> From: Taps [taps-bounces@ietf.org] on behalf of Aaron Falk =
[aaron.falk@gmail.com]
> Sent: Wednesday, August 20, 2014 10:16 AM
> To: Michael Welzl
> Cc: Spencer Dawkins at IETF; taps@ietf.org
> Subject: Re: [Taps] So, catching back up on the charter
>=20
> First, apologies to the group for not explaining the reasoning for the =
changes in the last draft. =20
>=20
> On Aug 20, 2014, at 3:15 AM, Michael Welzl <michawe@ifi.uio.no> wrote:
>=20
>> On 20. aug. 2014, at 05:30, Spencer Dawkins at IETF wrote:
>>=20
>>>=20
>>> The milestone text is a matter for the AD, in consultation with the =
working group. Additions, changes and deletions that are within scope of =
the agreed charter don't go back to the IESG. We often stick document =
status in milestones, and that doesn't go back to the IESG, either.
>>>=20
>>> Milestone dates are a matter for the chairs, in consultation with =
the working group. An AD might have opinions about how fast a working =
group should be moving, but we don't approve milestone date changes.
>>=20
>> Thanks a lot for all this information!
>=20
> Connecting the dots a bit here to make things more explicit: the =
removal of the 3rd milestone was at Spencer=92s request and in response =
to repeated IAB guidance that work on the third deliverable was a =
possible distraction from completing the 1st two.  The AD & IESG are the =
'work managers' for the IETF so their opinion counts on this topic.

IESG: is this indeed their opinion? If so, why didn't they say that =
during IESG review?
AD: in his email, Spencer essentially said that milestones don't matter =
much; I tried to explain why I think this milestone matters to us.
IAB: All I know is that IAB member Brian Trammell has written, to the =
list, yesterday: "Per the third point of the charter, I think we want to =
add the third milestone back, but make clear that the effort is =
experimental; something like:"

...add to this the fact that we're after IETF Open review, where this =
charter has been looked at and agreed upon by a lot of folks who might =
no longer agree if we do a significant content change, then this seems =
just weird to me.


>>> The high-order bit is, you really want work described in the charter =
text unless you want to go back to the IESG, but a working group can =
add/change/remove milestones for work that's described in the charter at =
whatever time seems appropriate. So, please look most carefully at the =
non-milestone charter text, because that's what's most difficult to =
change.
>>=20
>> There were some smaller changes to it in the last proposal that I =
suggested to undo in my previous email, because we do want to write that =
third document. Note that "undo" means "back to the version that was at =
IETF open review. I guess we should avoid semantic changes to that =
version unless we have very strong reasons.
>=20
> I=92ll address that in the relevant thread. Keep in mind that the =
charter is now being reviewed by folks outside the group so it is not =
surprising that there are new questions coming up (particularly about =
clarity).  My experience is that this broader review is often important =
for making explicit some implied context.  I=92ve tried to add detail in =
my changes but maybe I=92ve gotten it wrong.  If so, that=92s useful to =
getting us all on the same page.
>=20
>>=20
>>=20
>>> I would expect TAPS to add milestones when TAPS is ready to adopt an =
individual draft (the draft name is one of the milestone attributes), =
and work on it as a group. After that, the draft needs to reflect the =
editor's understanding of what the working group thinks.
>>>=20
>>> Q: So, my question:=20
>>>=20
>>> How important is it for the working group to begin work on the third =
deliverable immediately?
>>=20
>> I can't speak to "immediately" - logically, that work follows the =
first two items. Some people may be eager to start some of this work =
straight away, perhaps - I really don't know, this is for others to =
answer.
>>=20
>> What I think is important to members of this group is that there is a =
dedication there that this document will be written. What you say above =
about milestones reflects their "internal" meaning, but I think there is =
another side to this: as someone external who *might* be interested in =
contributing to TAPS, I go to the IETF web site, click on TAPS, see e.g. =
the first two milestones and think "ah, these two lists is all they =
really develop". The most interesting bit is missing - so it's a boring, =
possibily useless group and I don't get involved.
>=20
> The charter modification that included the description of the third =
doc without scheduling the milestone was intended to address just that =
point.  This is planned work but won=92t be scheduled yet.=20

Why not scheduled? We wanted it to be scheduled, we wanted a dedication =
that this will be done when we put it in the charter about a year ago =
and when we kept it there all this time.


>> Flexibility regarding how services really are provided is a key =
feature of TAPS, so it's absolutely natural for that third item to be =
experimental - but if we don't document an example way of implementing =
this, we really just have an empty shell. Similarly, if we don't put the =
milestone there now, we have an obviously boring group. That would be a =
bit like defining what DiffServ services do for the application without =
even hinting at how they could be implemented.
>=20
> I=92m a little concerned that =93flexibility=94, =93experimental=94, =
and =93interesting=94 are indicators that there=92s research to be done =
here.  And the IETF doesn=92t have a good track record for research in =
working groups.  (That is a role for the IRTF, as I=92m sure you know.)  =
Working groups seem to function best when there are one or more =
well-worked out proposals (or, better, running code) that the group can =
reconcile.  So, I can understand the concern about this being a =
distraction from the =91boring but useful=92 work.

I don't understand. It's perfectly normal, and good design, to =
standardize only what's needed and keep things open. That's all over =
IETF standards - as you know from DCCP, which is a framework for =
"interesting" "experimental" new CCIDs. That's what I'm talking about. =
We do want a well-worked out proposal and running code, just not =
prescribe it as the only possible implementation.

Plus, for a more general answer to the standard "isn't this research, =
shouldn't this be IRTF work?" question, see our FAQ  ;-)
A1.2.2 at =
https://sites.google.com/site/transportprotocolservices/questions-that-we-=
need-to-answer

Cheers,
Michael


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br><div><div>On 20. aug. 2014, at 16:46, Marie-Jose =
Montpetit &lt;<a href=3D"mailto:mariejo@mit.edu">mariejo@mit.edu</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div fpstyle=3D"1" ocsi=3D"0" style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word;"><div =
style=3D"direction: ltr; font-family: Tahoma; font-size: 10pt;">I may =
talk for myself but yes running code is one reason I am interested in =
this. I have worked and still am working on architectures for this. But =
the proof is in the pudding. As long as we cannot show a approach that =
works, scales and is reliable we are doing research not engineering. And =
after 15 years of research I am ready for engineering =
:-)<div><br></div><div>/mjm<br><div style=3D"font-family: 'Times New =
Roman'; font-size: 16px;"><hr tabindex=3D"-1"><div id=3D"divRpF501573" =
style=3D"direction: ltr;"><font face=3D"Tahoma" =
size=3D"2"><b>From:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Taps [<a =
href=3D"mailto:taps-bounces@ietf.org">taps-bounces@ietf.org</a>] on =
behalf of Aaron Falk [<a =
href=3D"mailto:aaron.falk@gmail.com">aaron.falk@gmail.com</a>]<br><b>Sent:=
</b><span class=3D"Apple-converted-space">&nbsp;</span>Wednesday, August =
20, 2014 10:16 AM<br><b>To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Michael =
Welzl<br><b>Cc:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Spencer Dawkins at IETF; <a =
href=3D"mailto:taps@ietf.org">taps@ietf.org</a><br><b>Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [Taps] So, catching =
back up on the charter<br></font><br></div><div></div><div>First, =
apologies to the group for not explaining the reasoning for the changes =
in the last draft. &nbsp;<br><br><div><div>On Aug 20, 2014, at 3:15 AM, =
Michael Welzl &lt;<a href=3D"mailto:michawe@ifi.uio.no" =
target=3D"_blank">michawe@ifi.uio.no</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div =
style=3D"font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px;">On 20. aug. =
2014, at 05:30, Spencer Dawkins at IETF wrote:<br><br><blockquote =
type=3D"cite"><br>The milestone text is a matter for the AD, in =
consultation with the working group. Additions, changes and deletions =
that are within scope of the agreed charter don't go back to the IESG. =
We often stick document status in milestones, and that doesn't go back =
to the IESG, either.<br><br>Milestone dates are a matter for the chairs, =
in consultation with the working group. An AD might have opinions about =
how fast a working group should be moving, but we don't approve =
milestone date changes.<br></blockquote><br>Thanks a lot for all this =
information!<br></div></blockquote><div><br></div><div>Connecting the =
dots a bit here to make things more explicit: the removal of the 3rd =
milestone was at Spencer=92s request and in response to repeated IAB =
guidance that work on the third deliverable was a possible distraction =
from completing the 1st two. &nbsp;The AD &amp; IESG are the 'work =
managers' for the IETF so their opinion counts on this =
topic.</div></div></div></div></div></div></div></blockquote><div><br></di=
v><div>IESG: is this indeed their opinion? If so, why didn't they say =
that during IESG review?</div><div>AD: in his email, Spencer essentially =
said that milestones don't matter much; I tried to explain why I think =
this milestone matters to us.</div><div>IAB: All I know is that IAB =
member Brian Trammell has written, to the list, yesterday: "Per the =
third point of the charter, I think we want to add the third milestone =
back, but make clear that the effort is experimental; something =
like:"</div><div><br></div><div>...add to this the fact that we're after =
IETF Open review, where this charter has been looked at and agreed upon =
by a lot of folks who might no longer agree if we do a significant =
content change, then this seems just weird to =
me.</div><div><br></div><br><blockquote type=3D"cite"><div fpstyle=3D"1" =
ocsi=3D"0" style=3D"font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word;"><div style=3D"direction: ltr; font-family: Tahoma; =
font-size: 10pt;"><div><div style=3D"font-family: 'Times New Roman'; =
font-size: 16px;"><div><div><blockquote type=3D"cite"><div =
style=3D"font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px;"><blockquote =
type=3D"cite">The high-order bit is, you really want work described in =
the charter text unless you want to go back to the IESG, but a working =
group can add/change/remove milestones for work that's described in the =
charter at whatever time seems appropriate. So, please look most =
carefully at the non-milestone charter text, because that's what's most =
difficult to change.<br></blockquote><br>There were some smaller changes =
to it in the last proposal that I suggested to undo in my previous =
email, because we do want to write that third document. Note that "undo" =
means "back to the version that was at IETF open review. I guess we =
should avoid semantic changes to that version unless we have very strong =
reasons.<br></div></blockquote><div><br></div><div>I=92ll address that =
in the relevant thread. Keep in mind that the charter is now being =
reviewed by folks outside the group so it is not surprising that there =
are new questions coming up (particularly about clarity). &nbsp;My =
experience is that this broader review is often important for making =
explicit some implied context. &nbsp;I=92ve tried to add detail in my =
changes but maybe I=92ve gotten it wrong. &nbsp;If so, that=92s useful =
to getting us all on the same page.</div><br><blockquote =
type=3D"cite"><div style=3D"font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px;"><br><br><blockquote type=3D"cite">I would expect TAPS to add =
milestones when TAPS is ready to adopt an individual draft (the draft =
name is one of the milestone attributes), and work on it as a group. =
After that, the draft needs to reflect the editor's understanding of =
what the working group thinks.<br><br>Q: So, my question:<span =
class=3D"Apple-converted-space">&nbsp;</span><br><br>How important is it =
for the working group to begin work on the third deliverable =
immediately?<br></blockquote><br>I can't speak to "immediately" - =
logically, that work follows the first two items. Some people may be =
eager to start some of this work straight away, perhaps - I really don't =
know, this is for others to answer.<br><br>What I think is important to =
members of this group is that there is a dedication there that this =
document will be written. What you say above about milestones reflects =
their "internal" meaning, but I think there is another side to this: as =
someone external who *might* be interested in contributing to TAPS, I go =
to the IETF web site, click on TAPS, see e.g. the first two milestones =
and think "ah, these two lists is all they really develop". The most =
interesting bit is missing - so it's a boring, possibily useless group =
and I don't get involved.</div></blockquote><div><br></div><div>The =
charter modification that included the description of the third doc =
without scheduling the milestone was intended to address just that =
point. &nbsp;This is planned work but won=92t be scheduled =
yet.&nbsp;</div></div></div></div></div></div></div></blockquote><div><br>=
</div>Why not scheduled? We wanted it to be scheduled, we wanted a =
dedication that this will be done when we put it in the charter about a =
year ago and when we kept it there all this =
time.</div><div><br></div><div><br><blockquote type=3D"cite"><div =
fpstyle=3D"1" ocsi=3D"0" style=3D"font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
word-wrap: break-word;"><div style=3D"direction: ltr; font-family: =
Tahoma; font-size: 10pt;"><div style=3D"font-family: 'Times New Roman'; =
font-size: 16px;"><blockquote type=3D"cite"><div style=3D"font-size: =
12px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px;">Flexibility regarding how services =
really are provided is a key feature of TAPS, so it's absolutely natural =
for that third item to be experimental - but if we don't document an =
example way of implementing this, we really just have an empty shell. =
Similarly, if we don't put the milestone there now, we have an obviously =
boring group. That would be a bit like defining what DiffServ services =
do for the application without even hinting at how they could be =
implemented.</div></blockquote><div><br></div><div>I=92m a little =
concerned that =93flexibility=94, =93experimental=94, and =93interesting=94=
 are indicators that there=92s research to be done here. &nbsp;And the =
IETF doesn=92t have a good track record for research in working groups. =
&nbsp;(That is a role for the IRTF, as I=92m sure you know.) =
&nbsp;Working groups seem to function best when there are one or more =
well-worked out proposals (or, better, running code) that the group can =
reconcile. &nbsp;So, I can understand the concern about this being a =
distraction from the =91boring but useful=92 =
work.</div></div></div></div></blockquote><div><br></div></div>I don't =
understand. It's perfectly normal, and good design, to standardize only =
what's needed and keep things open. That's all over IETF standards - as =
you know from DCCP, which is a framework for "interesting" =
"experimental" new CCIDs. That's what I'm talking about. We do want a =
well-worked out proposal and running code, just not prescribe it as the =
only possible implementation.<div><br></div><div>Plus, for a more =
general answer to the standard "isn't this research, shouldn't this be =
IRTF work?" question, see our FAQ &nbsp;;-)</div><div>A1.2.2 at&nbsp;<a =
href=3D"https://sites.google.com/site/transportprotocolservices/questions-=
that-we-need-to-answer">https://sites.google.com/site/transportprotocolser=
vices/questions-that-we-need-to-answer</a></div><div><br></div><div>Cheers=
,</div><div>Michael</div><div><br></div></body></html>=

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From: Michael Welzl <michawe@ifi.uio.no>
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Date: Thu, 21 Aug 2014 00:00:22 +0200
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References: <CALiXHozefTPLWKhXxw42nzy3j89cFM1a74z-jgQdUgFp+PWCaw@mail.gmail.com> <D10404C9-AB90-4C73-9244-F681A2564510@trammell.ch> <FC6D0B0A-D764-42DC-90A9-5D157F924610@ifi.uio.no> <BCDE94D2-BACE-4075-A23B-B237767F45A7@trammell.ch> <E2E8F277-4190-4922-A5E5-C2CB60C34A85@ifi.uio.no> <59E75860-5639-442C-A8A7-BFF9851B0267@trammell.ch> <53F36CF0.3080202@kau.se> <626127AC-E837-4F89-B09B-6F6BD8ADEAD9@cl.cam.ac.uk> <6B55C077-D987-42F3-BDC2-3887B758E024@trammell.ch> <CCCA6B8F-BF58-429F-941B-9A45D0C490BF@ifi.uio.no> <9331EBBD-A2CB-4B57-8AE5-8D5EED7667C2@cl.cam.ac.uk> <D45FD5E7-8F74-48B5-B051-A1A15514E954@ifi.uio.no> <21676519-6ED7-46CE-866D-603D59F0BD9F@gmail.com>
To: Aaron Falk <aaron.falk@gmail.com>
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Subject: Re: [Taps] TAPS charter rev 20140818
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On 20. aug. 2014, at 16:54, Aaron Falk <aaron.falk@gmail.com> wrote:

> We have a problem that folks who have not been part of the discussion =
from the beginning (like myself) need additional clarity when talking =
about =93support mechanisms=94.  I=92ve tried to add some in the =
descriptions of docs 2 and 3 but apparently it needs refinement.  The =
current charter says:
>=20
>> 2) Note that not all capabilities of IETF Transport protocols need to =
be exposed as Transport Services. This document will recommend the =
minimal set of Transport Services for inclusion in the abstract API. The =
resulting document will also provide guidance on making a choice among =
available mechanisms and protocols to obtain a certain Transport =
Service.=20
>=20
> Some folks on the list have proposed the following alternative:
>=20
>>> 2) Define the minimal set of Transport Services that must be =
provided by mechanisms such as those to be specified in work item 3. The =
resulting document will give guidance on choosing from available =
mechanisms and protocols to provide a given Transport Service. Note that =
not all the capabilities of IETF Transport protocols need to be exposed =
as Transport Services.
>=20
> The problem here is that we haven=92t described what work item 3 is.  =
I=92d prefer a statement that stands on its own. If you don=92t like my =
text above, please propose something you like better.

Work item 3 is just the third item in the list, where the text you cite =
above is the 2nd item. If that isn't clear enough, we could replace the =
sentence above them:

The Working Group will:

with:

The Working Group will consider the following three work items:

In my opinion, the clearest version is in the charter that went to IETF =
open review:
***
- Specify the subset of those Transport Services, as identified in=20
  item 1, that end systems supporting TAPS will provide, and give
  guidance on choosing among available mechanisms and protocols.
***

which you changed into the "work item 3" text on 26 July, i.e. during =
IETF open review, and documented in the diff file: =
"charter-diff-20140722e-20140726.pdf" that you sent to the list, and =
justified with:

"I've been working on a few changes that I think clarify the charter, =
particularly the document goals.  Since I wasn't part of the initial =
discussions I may have misunderstood where there is agreement.  For =
example, the role of the second document seems to be really about =
getting consensus on some requirements for the third."

I couldn't see any other input leading to this change. My suggestion =
would be to undo it.


> In the third doc I tried to be a little more concrete about what a =
=93support mechanism=94 is:
>=20
>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20
>=20
>=20
> Trying to piece an alternate phrasing from the thread I get:
>=20
>>> 3) Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services and defining an experiment to evaluate =
such interfaces for incremental deployability.  The associated milestone =
will be scheduled and work on this document will begin when the TAPS =
Transport Services have been specified.=20
>=20
> This seems less concrete to me.  I like =93select and engage =
protocols=94 but I=92d like to hear more input from the group.

What we did mean when we wrote this was "Happy Eyeballs ++". The Happy =
Eyeballs folks are on the list and have stated interest in continuing it =
here; there were ideas (all in the list archives..) on making it more =
scalable by using it later, i.e. no need to send out so much SYN-style =
traffic so fast; caching information; first asking the other side what =
protocols it supports to only test those that really must be tested. How =
to state this more clearly? Not sure. I think we were all quite happy =
with the "select and engage an appropriate protocol" sentence.

Cheers,
Michael


--Apple-Mail=_32507CF2-C0D6-4C0A-9E1F-2D2BC06C2AA8
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br><div><div>On 20. aug. 2014, at 16:54, Aaron Falk =
&lt;<a href=3D"mailto:aaron.falk@gmail.com">aaron.falk@gmail.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite">
<meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3DWindows-1252"><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><div>We have a problem that folks who have not been =
part of the discussion from the beginning (like myself) need additional =
clarity when talking about =93support mechanisms=94. &nbsp;I=92ve tried =
to add some in the descriptions of docs 2 and 3 but apparently it needs =
refinement. &nbsp;The current charter =
says:</div><div><br></div><div><div></div><blockquote type=3D"cite"><font =
face=3D"courier new, monospace">2) Note that not all capabilities of =
IETF Transport protocols need to be exposed as Transport Services. This =
document will recommend the minimal set of Transport Services for =
inclusion in the abstract API. The resulting document will also provide =
guidance on making a choice among available mechanisms and protocols to =
obtain a certain Transport =
Service.&nbsp;</font></blockquote><div><br></div><div>Some folks on the =
list have proposed the following =
alternative:</div><div><br></div><div><blockquote =
type=3D"cite"><blockquote type=3D"cite">2) Define the minimal set of =
Transport Services that must be provided by mechanisms such as those to =
be specified in work item 3. The resulting document will give guidance =
on choosing from available mechanisms and protocols to provide a given =
Transport Service. Note that not all the capabilities of IETF Transport =
protocols need to be exposed as Transport =
Services.</blockquote></blockquote><br></div><div>The problem here is =
that we haven=92t described what work item 3 is. &nbsp;I=92d prefer a =
statement that stands on its own. If you don=92t like my text above, =
please propose something you like =
better.</div></div></div></blockquote><div><br></div><div>Work item 3 is =
just the third item in the list, where the text you cite above is the =
2nd item. If that isn't clear enough, we could replace the sentence =
above them:</div><div><br></div><div>The Working Group =
will:</div><div><br></div><div>with:</div><div><br></div><div>The =
Working Group will consider the following three work =
items:</div><div><br></div><div>In my opinion, the clearest version is =
in the charter that went to IETF open =
review:</div><div>***</div><div><div>- Specify the subset of those =
Transport Services, as identified in&nbsp;</div><div>&nbsp; item 1, that =
end systems supporting TAPS will provide, and give</div><div>&nbsp; =
guidance on choosing among available mechanisms and =
protocols.</div><div>***</div><div><br></div></div><div>which you =
changed into the "work item 3" text on 26 July, i.e. during IETF open =
review, and documented in the diff file: =
"charter-diff-20140722e-20140726.pdf" that you sent to the list, and =
justified with:</div><div><br></div><div>"I've been working on a few =
changes that I think clarify the charter, particularly the document =
goals. &nbsp;Since I wasn't part of the initial discussions I may have =
misunderstood where&nbsp;there is agreement. &nbsp;For example, the role =
of the second document seems to be really about getting consensus on =
some requirements for the third."</div><div><br></div><div>I couldn't =
see any other input leading to this change. My suggestion would be to =
undo it.</div><div><br></div><br><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div><div>In the third doc I =
tried to be a little more concrete about what a =93support mechanism=94 =
is:</div><div><br></div><blockquote type=3D"cite"><span =
style=3D"font-family: 'courier new', monospace;">3) Specify experimental =
support mechanisms to provide the Transport Services identified in work =
item 2. This document will explain how to select and engage an =
appropriate protocol and how to discover which protocols are available =
for a given connection. Further, it will provide a basis for incremental =
deployment. The associated milestone will be scheduled and work on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</span></blockquote></div><div><br></div><div>Trying to =
piece an alternate phrasing from the thread I =
get:</div><div><br></div><div><blockquote type=3D"cite"><blockquote =
type=3D"cite">3) Submit to the IESG an Experimental document =
exploring&nbsp;abstract interfaces to Transport Services and defining an =
experiment to evaluate such interfaces for incremental deployability. =
&nbsp;The associated milestone will be scheduled and work&nbsp;on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</blockquote></blockquote><br></div><div>This seems less =
concrete to me. &nbsp;I like =93select and engage protocols=94 but I=92d =
like to hear more input from the =
group.</div></div></blockquote><div><br></div><div>What we did mean when =
we wrote this was "Happy Eyeballs ++". The Happy Eyeballs folks are on =
the list and have stated interest in continuing it here; there were =
ideas (all in the list archives..) on making it more scalable by using =
it later, i.e. no need to send out so much SYN-style traffic so fast; =
caching information; first asking the other side what protocols it =
supports to only test those that really must be tested. How to state =
this more clearly? Not sure. I think we were all quite happy with the =
"select and engage an appropriate protocol" =
sentence.</div><div><br></div><div>Cheers,</div><div>Michael</div><div><br=
></div></div></body></html>=

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Date: Thu, 21 Aug 2014 03:09:36 -0500
From: Spencer Dawkins <spencerdawkins.ietf@gmail.com>
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Cc: Aaron Falk <aaron.falk@gmail.com>, "taps@ietf.org" <taps@ietf.org>
Subject: Re: [Taps] So, catching back up on the charter
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Not particularly to Michael, but replying to this note because he 
eloquently phrased some questions that other folk on this mailing list 
almost certainly share ...

On 08/20/2014 04:28 PM, Michael Welzl wrote:
>
> On 20. aug. 2014, at 16:46, Marie-Jose Montpetit <mariejo@mit.edu 
> <mailto:mariejo@mit.edu>> wrote:
>
>> I may talk for myself but yes running code is one reason I am 
>> interested in this. I have worked and still am working on 
>> architectures for this. But the proof is in the pudding. As long as 
>> we cannot show a approach that works, scales and is reliable we are 
>> doing research not engineering. And after 15 years of research I am 
>> ready for engineering :-)
>>
>> /mjm
>> ------------------------------------------------------------------------
>> *From:*Taps [taps-bounces@ietf.org <mailto:taps-bounces@ietf.org>] on 
>> behalf of Aaron Falk [aaron.falk@gmail.com <mailto:aaron.falk@gmail.com>]
>> *Sent:*Wednesday, August 20, 2014 10:16 AM
>> *To:*Michael Welzl
>> *Cc:*Spencer Dawkins at IETF; taps@ietf.org <mailto:taps@ietf.org>
>> *Subject:*Re: [Taps] So, catching back up on the charter
>>
>> First, apologies to the group for not explaining the reasoning for 
>> the changes in the last draft.
>>
>> On Aug 20, 2014, at 3:15 AM, Michael Welzl <michawe@ifi.uio.no 
>> <mailto:michawe@ifi.uio.no>> wrote:
>>
>>> On 20. aug. 2014, at 05:30, Spencer Dawkins at IETF wrote:
>>>
>>>>
>>>> The milestone text is a matter for the AD, in consultation with the 
>>>> working group. Additions, changes and deletions that are within 
>>>> scope of the agreed charter don't go back to the IESG. We often 
>>>> stick document status in milestones, and that doesn't go back to 
>>>> the IESG, either.
>>>>
>>>> Milestone dates are a matter for the chairs, in consultation with 
>>>> the working group. An AD might have opinions about how fast a 
>>>> working group should be moving, but we don't approve milestone date 
>>>> changes.
>>>
>>> Thanks a lot for all this information!
>>
>> Connecting the dots a bit here to make things more explicit: the 
>> removal of the 3rd milestone was at Spencer’s request and in response 
>> to repeated IAB guidance that work on the third deliverable was a 
>> possible distraction from completing the 1st two.  The AD & IESG are 
>> the 'work managers' for the IETF so their opinion counts on this topic.
>
> IESG: is this indeed their opinion? If so, why didn't they say that 
> during IESG review?

This charter isn't actually to IESG Review yet. 
https://datatracker.ietf.org/doc/charter-ietf-taps/ shows the charter in 
External Review. If you click on the Charter State hyperlink, you get 
https://datatracker.ietf.org/doc/help/state/charter/, which shows that 
IESG Review happens next.

I've already talked to the rest of the IESG about how bleeding confusing 
it is that we ballot the charter for External Review (for the purposes 
of this conversation, "to send it to the IETF for External Review"), and 
ballot the charter again for approval. You can see the first ballot if 
you click on version 00-00 of the charter - that was the one that went 
through Internal Review, and was approved for External Review).

For basically ever, balloting to send a charter for External Review 
happened in a closet. No one outside the IESG and IAB saw what was 
happening. The IAB sees what's happening because they're chartered to 
look at all BOFs, as part of their duty for architectural oversight, as 
described in http://tools.ietf.org/html/rfc2850#section-2.1. But no one 
else was involved.

Recently, and by recently I mean within the past year, we've started 
putting the relevant mailing list as one of the notification targets. 
That means what's happening is more transparent than what was happening 
previously, but almost no one (including the IESG and IAB) is used to 
that yet. So, it's still confusing to get ballot notifications during 
Internal Review. My apologies for that, of course.

> AD: in his email, Spencer essentially said that milestones don't 
> matter much; I tried to explain why I think this milestone matters to us.

If I said that, I misspoke. Let me try again.

Milestones don't matter during the charter discussions, but they do 
matter when the working group is actually working on a document. The 
intention is, that they tell the working group (and people outside the 
working group) what's on the plate *now*.

The charter describes what's in scope, not the milestones. The 
milestones are to help the working group manage its work to accomplish 
what's in the charter.

People can work on anything they like, and if they're working on 
something that's within scope for the working group, they can talk about 
it on the mailing list, and if there's time after discussion of work on 
the current milestones, the chairs can make time for it in meetings. But 
the purpose of milestones is to focus work.

It may be that this should change, but that's the way our process works 
today.

> IAB: All I know is that IAB member Brian Trammell has written, to the 
> list, yesterday: "Per the third point of the charter, I think we want 
> to add the third milestone back, but make clear that the effort is 
> experimental; something like:"

So, it's possible that not everyone is familiar with 
http://www.iab.org/documents/correspondence-reports-documents/2012-2/iab-member-roles-in-evaluating-new-work-proposals/, 
but it might be helpful to mention this extract:

>
>       A note about IAB member roles
>
> In providing architectural oversight and guidance for a BOF, IAB 
> members are rarely speaking for the IAB, because the IAB has rarely 
> determined an IAB consensus position on new work being proposed. 
> Individual IAB members do not have a privileged role in determining 
> whether a BOF will result in a chartered working group. IAB members 
> providing architectural oversight must ensure that their role is not 
> misunderstood by BOF proponents or by the larger community of interest.
>
> The IESG is requested to give comments from IAB members the same 
> weight the comments would be given if those persons were not serving 
> on the IAB — no more, and no less.
>

So, it doesn't actually matter that Brian is on the IAB (I'm glad that 
he is, but that has nothing to do with this charter discussion).

I held the pen for that IAB document, so I actually believe what it says.

> ...add to this the fact that we're after IETF Open review, where this 
> charter has been looked at and agreed upon by a lot of folks who might 
> no longer agree if we do a significant content change, then this seems 
> just weird to me.

So the thing to remember here is that working group charters are IETF 
community property. Yes, there can be a tension between what the broader 
community thinks should happen and what the people who actually do the 
work are willing to do. That's why we're talking now.

I should also note that the WG Review announcement at 
http://www.ietf.org/mail-archive/web/ietf-announce/current/msg13052.html 
points to the IESG (the exact text says this:

> A new IETF working group has been proposed in the Transport Area. The
> IESG has not made any determination yet. The following draft charter was
> submitted, and is provided for informational purposes only. Please send
> your comments to the IESG mailing list (iesg at ietf.org) by 2014-07-31.

This is true for all WG Reviews. It's good that there's been a lot of 
discussion in public, and that should shorten the conversation we're 
having now, but private feedback to the IESG (not just from IAB members, 
but from anyone) is fine.

Again, it may be that this should change, but that's the way our process 
works today.

>
>>>> The high-order bit is, you really want work described in the 
>>>> charter text unless you want to go back to the IESG, but a working 
>>>> group can add/change/remove milestones for work that's described in 
>>>> the charter at whatever time seems appropriate. So, please look 
>>>> most carefully at the non-milestone charter text, because that's 
>>>> what's most difficult to change.
>>>
>>> There were some smaller changes to it in the last proposal that I 
>>> suggested to undo in my previous email, because we do want to write 
>>> that third document. Note that "undo" means "back to the version 
>>> that was at IETF open review. I guess we should avoid semantic 
>>> changes to that version unless we have very strong reasons.
>>
>> I’ll address that in the relevant thread. Keep in mind that the 
>> charter is now being reviewed by folks outside the group so it is not 
>> surprising that there are new questions coming up (particularly about 
>> clarity).  My experience is that this broader review is often 
>> important for making explicit some implied context.  I’ve tried to 
>> add detail in my changes but maybe I’ve gotten it wrong.  If so, 
>> that’s useful to getting us all on the same page.
>>

Right about here, it's helpful for me to mention that you folk are still 
talking, and I'm still listening :-)

I hope this note has been useful in navigating unfamiliar territory. 
Most of the people who aren't on the IESG aren't involved in the charter 
process often enough to pick up all the subtleties (see the p.s. below).

And thanks for the questions.

Spencer

p.s. Speaking not as the responsible AD, but as Spencer, and candidly - 
I was involved in the charter process for three working groups I 
co-chaired, I spent more than three years watching the IESG up close as 
one of their scribes, I spent just over three years on the IAB, and 
chartering new work is STILL the least obvious thing to me that I'm 
responsible for. If other people are also confused, or would like it to 
work differently, that could be an excellent open mike topic for the 
IETF 91 plenaries (for both the IAB and the IESG, I'd say).

Please don't be shy. We (the IESG) want the way we charter new work to, 
well, "work".

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    Not particularly to Michael, but replying to this note because he
    eloquently phrased some questions that other folk on this mailing
    list almost certainly share ...<br>
    <br>
    On 08/20/2014 04:28 PM, Michael Welzl wrote:<br>
    <blockquote
      cite="mid:9FC2A7CE-F724-42F8-A989-5AC5E6331B79@ifi.uio.no"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html;
        charset=windows-1252">
      <br>
      <div>
        <div>On 20. aug. 2014, at 16:46, Marie-Jose Montpetit &lt;<a
            moz-do-not-send="true" href="mailto:mariejo@mit.edu">mariejo@mit.edu</a>&gt;
          wrote:</div>
        <br class="Apple-interchange-newline">
        <blockquote type="cite">
          <div fpstyle="1" ocsi="0" style="font-family: Helvetica;
            font-size: 12px; font-style: normal; font-variant: normal;
            font-weight: normal; letter-spacing: normal; line-height:
            normal; orphans: auto; text-align: start; text-indent: 0px;
            text-transform: none; white-space: normal; widows: auto;
            word-spacing: 0px; -webkit-text-stroke-width: 0px;
            word-wrap: break-word;">
            <div style="direction: ltr; font-family: Tahoma; font-size:
              10pt;">I may talk for myself but yes running code is one
              reason I am interested in this. I have worked and still am
              working on architectures for this. But the proof is in the
              pudding. As long as we cannot show a approach that works,
              scales and is reliable we are doing research not
              engineering. And after 15 years of research I am ready for
              engineering :-)
              <div><br>
              </div>
              <div>/mjm<br>
                <div style="font-family: 'Times New Roman'; font-size:
                  16px;">
                  <hr tabindex="-1">
                  <div id="divRpF501573" style="direction: ltr;"><font
                      face="Tahoma" size="2"><b>From:</b><span
                        class="Apple-converted-space"> </span>Taps [<a
                        moz-do-not-send="true"
                        href="mailto:taps-bounces@ietf.org">taps-bounces@ietf.org</a>]
                      on behalf of Aaron Falk [<a moz-do-not-send="true"
                        href="mailto:aaron.falk@gmail.com">aaron.falk@gmail.com</a>]<br>
                      <b>Sent:</b><span class="Apple-converted-space"> </span>Wednesday,
                      August 20, 2014 10:16 AM<br>
                      <b>To:</b><span class="Apple-converted-space"> </span>Michael
                      Welzl<br>
                      <b>Cc:</b><span class="Apple-converted-space"> </span>Spencer
                      Dawkins at IETF; <a moz-do-not-send="true"
                        href="mailto:taps@ietf.org">taps@ietf.org</a><br>
                      <b>Subject:</b><span class="Apple-converted-space"> </span>Re:
                      [Taps] So, catching back up on the charter<br>
                    </font><br>
                  </div>
                  <div>First, apologies to the group for not explaining
                    the reasoning for the changes in the last draft.  <br>
                    <br>
                    <div>
                      <div>On Aug 20, 2014, at 3:15 AM, Michael Welzl
                        &lt;<a moz-do-not-send="true"
                          href="mailto:michawe@ifi.uio.no"
                          target="_blank">michawe@ifi.uio.no</a>&gt;
                        wrote:</div>
                      <br class="Apple-interchange-newline">
                      <blockquote type="cite">
                        <div style="font-size: 12px; font-style: normal;
                          font-variant: normal; font-weight: normal;
                          letter-spacing: normal; line-height: normal;
                          orphans: auto; text-align: start; text-indent:
                          0px; text-transform: none; white-space:
                          normal; widows: auto; word-spacing: 0px;">On
                          20. aug. 2014, at 05:30, Spencer Dawkins at
                          IETF wrote:<br>
                          <br>
                          <blockquote type="cite"><br>
                            The milestone text is a matter for the AD,
                            in consultation with the working group.
                            Additions, changes and deletions that are
                            within scope of the agreed charter don't go
                            back to the IESG. We often stick document
                            status in milestones, and that doesn't go
                            back to the IESG, either.<br>
                            <br>
                            Milestone dates are a matter for the chairs,
                            in consultation with the working group. An
                            AD might have opinions about how fast a
                            working group should be moving, but we don't
                            approve milestone date changes.<br>
                          </blockquote>
                          <br>
                          Thanks a lot for all this information!<br>
                        </div>
                      </blockquote>
                      <div><br>
                      </div>
                      <div>Connecting the dots a bit here to make things
                        more explicit: the removal of the 3rd milestone
                        was at Spencer’s request and in response to
                        repeated IAB guidance that work on the third
                        deliverable was a possible distraction from
                        completing the 1st two.  The AD &amp; IESG are
                        the 'work managers' for the IETF so their
                        opinion counts on this topic.</div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </blockquote>
        <div><br>
        </div>
        <div>IESG: is this indeed their opinion? If so, why didn't they
          say that during IESG review?</div>
      </div>
    </blockquote>
    <br>
    This charter isn't actually to IESG Review yet.
    <a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/charter-ietf-taps/">https://datatracker.ietf.org/doc/charter-ietf-taps/</a> shows the
    charter in External Review. If you click on the Charter State
    hyperlink, you get
    <a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/help/state/charter/">https://datatracker.ietf.org/doc/help/state/charter/</a>, which shows
    that IESG Review happens next.<br>
    <br>
    I've already talked to the rest of the IESG about how bleeding
    confusing it is that we ballot the charter for External Review (for
    the purposes of this conversation, "to send it to the IETF for
    External Review"), and ballot the charter again for approval. You
    can see the first ballot if you click on version 00-00 of the
    charter - that was the one that went through Internal Review, and
    was approved for External Review).<br>
    <br>
    For basically ever, balloting to send a charter for External Review
    happened in a closet. No one outside the IESG and IAB saw what was
    happening. The IAB sees what's happening because they're chartered
    to look at all BOFs, as part of their duty for architectural
    oversight, as described in
    <a class="moz-txt-link-freetext" href="http://tools.ietf.org/html/rfc2850#section-2.1">http://tools.ietf.org/html/rfc2850#section-2.1</a>. But no one else was
    involved.<br>
    <br>
    Recently, and by recently I mean within the past year, we've started
    putting the relevant mailing list as one of the notification
    targets. That means what's happening is more transparent than what
    was happening previously, but almost no one (including the IESG and
    IAB) is used to that yet. So, it's still confusing to get ballot
    notifications during Internal Review. My apologies for that, of
    course.<br>
    <br>
    <blockquote
      cite="mid:9FC2A7CE-F724-42F8-A989-5AC5E6331B79@ifi.uio.no"
      type="cite">
      <div>
        <div>AD: in his email, Spencer essentially said that milestones
          don't matter much; I tried to explain why I think this
          milestone matters to us.</div>
      </div>
    </blockquote>
    <br>
    If I said that, I misspoke. Let me try again.<br>
    <br>
    Milestones don't matter during the charter discussions, but they do
    matter when the working group is actually working on a document. The
    intention is, that they tell the working group (and people outside
    the working group) what's on the plate *now*. <br>
    <br>
    The charter describes what's in scope, not the milestones. The
    milestones are to help the working group manage its work to
    accomplish what's in the charter.<br>
    <br>
    People can work on anything they like, and if they're working on
    something that's within scope for the working group, they can talk
    about it on the mailing list, and if there's time after discussion
    of work on the current milestones, the chairs can make time for it
    in meetings. But the purpose of milestones is to focus work.<br>
    <br>
    It may be that this should change, but that's the way our process
    works today.<br>
    <br>
    <blockquote
      cite="mid:9FC2A7CE-F724-42F8-A989-5AC5E6331B79@ifi.uio.no"
      type="cite">
      <div>
        <div>IAB: All I know is that IAB member Brian Trammell has
          written, to the list, yesterday: "Per the third point of the
          charter, I think we want to add the third milestone back, but
          make clear that the effort is experimental; something like:"</div>
      </div>
    </blockquote>
    <br>
    So, it's possible that not everyone is familiar with
    <a class="moz-txt-link-freetext" href="http://www.iab.org/documents/correspondence-reports-documents/2012-2/iab-member-roles-in-evaluating-new-work-proposals/">http://www.iab.org/documents/correspondence-reports-documents/2012-2/iab-member-roles-in-evaluating-new-work-proposals/</a>,
    but it might be helpful to mention this extract:<br>
    <br>
    <blockquote type="cite">
      <meta http-equiv="content-type" content="text/html;
        charset=windows-1252">
      <h3 style="color: rgb(0, 0, 0); font-family: Helvetica, Arial,
        Geneva, sans-serif; font-style: normal; font-variant: normal;
        letter-spacing: normal; line-height: normal; orphans: auto;
        text-align: start; text-indent: 0px; text-transform: none;
        white-space: normal; widows: auto; word-spacing: 0px;
        -webkit-text-stroke-width: 0px; background-color: rgb(255, 255,
        255);">A note about IAB member roles</h3>
      <p style="color: rgb(0, 0, 0); font-family: Helvetica, Arial,
        Geneva, sans-serif; font-size: medium; font-style: normal;
        font-variant: normal; font-weight: normal; letter-spacing:
        normal; line-height: normal; orphans: auto; text-align: start;
        text-indent: 0px; text-transform: none; white-space: normal;
        widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;
        background-color: rgb(255, 255, 255);">In providing
        architectural oversight and guidance for a BOF, IAB members are
        rarely speaking for the IAB, because the IAB has rarely
        determined an IAB consensus position on new work being proposed.
        Individual IAB members do not have a privileged role in
        determining whether a BOF will result in a chartered working
        group. IAB members providing architectural oversight must ensure
        that their role is not misunderstood by BOF proponents or by the
        larger community of interest.</p>
      <p style="color: rgb(0, 0, 0); font-family: Helvetica, Arial,
        Geneva, sans-serif; font-size: medium; font-style: normal;
        font-variant: normal; font-weight: normal; letter-spacing:
        normal; line-height: normal; orphans: auto; text-align: start;
        text-indent: 0px; text-transform: none; white-space: normal;
        widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;
        background-color: rgb(255, 255, 255);">The IESG is requested to
        give comments from IAB members the same weight the comments
        would be given if those persons were not serving on the IAB — no
        more, and no less.</p>
    </blockquote>
    <br>
    So, it doesn't actually matter that Brian is on the IAB (I'm glad
    that he is, but that has nothing to do with this charter
    discussion).<br>
    <br>
    I held the pen for that IAB document, so I actually believe what it
    says.<br>
    <br>
    <blockquote
      cite="mid:9FC2A7CE-F724-42F8-A989-5AC5E6331B79@ifi.uio.no"
      type="cite">
      <div>
        <div>...add to this the fact that we're after IETF Open review,
          where this charter has been looked at and agreed upon by a lot
          of folks who might no longer agree if we do a significant
          content change, then this seems just weird to me.</div>
      </div>
    </blockquote>
    <br>
    So the thing to remember here is that working group charters are
    IETF community property. Yes, there can be a tension between what
    the broader community thinks should happen and what the people who
    actually do the work are willing to do. That's why we're talking
    now.<br>
    <br>
    I should also note that the WG Review announcement at
    <a class="moz-txt-link-freetext" href="http://www.ietf.org/mail-archive/web/ietf-announce/current/msg13052.html">http://www.ietf.org/mail-archive/web/ietf-announce/current/msg13052.html</a>
    points to the IESG (the exact text says this:<br>
    <br>
    <blockquote type="cite">
      <meta http-equiv="content-type" content="text/html;
        charset=windows-1252">
      <pre style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">A new IETF working group has been proposed in the Transport Area. The
IESG has not made any determination yet. The following draft charter was
submitted, and is provided for informational purposes only. Please send
your comments to the IESG mailing list (iesg at ietf.org) by 2014-07-31.</pre>
    </blockquote>
    <br>
    This is true for all WG Reviews. It's good that there's been a lot
    of discussion in public, and that should shorten the conversation
    we're having now, but private feedback to the IESG (not just from
    IAB members, but from anyone) is fine.<br>
    <br>
    Again, it may be that this should change, but that's the way our
    process works today.<br>
    <br>
    <blockquote
      cite="mid:9FC2A7CE-F724-42F8-A989-5AC5E6331B79@ifi.uio.no"
      type="cite">
      <div><br>
        <blockquote type="cite">
          <div fpstyle="1" ocsi="0" style="font-family: Helvetica;
            font-size: 12px; font-style: normal; font-variant: normal;
            font-weight: normal; letter-spacing: normal; line-height:
            normal; orphans: auto; text-align: start; text-indent: 0px;
            text-transform: none; white-space: normal; widows: auto;
            word-spacing: 0px; -webkit-text-stroke-width: 0px;
            word-wrap: break-word;">
            <div style="direction: ltr; font-family: Tahoma; font-size:
              10pt;">
              <div>
                <div style="font-family: 'Times New Roman'; font-size:
                  16px;">
                  <div>
                    <div>
                      <blockquote type="cite">
                        <div style="font-size: 12px; font-style: normal;
                          font-variant: normal; font-weight: normal;
                          letter-spacing: normal; line-height: normal;
                          orphans: auto; text-align: start; text-indent:
                          0px; text-transform: none; white-space:
                          normal; widows: auto; word-spacing: 0px;">
                          <blockquote type="cite">The high-order bit is,
                            you really want work described in the
                            charter text unless you want to go back to
                            the IESG, but a working group can
                            add/change/remove milestones for work that's
                            described in the charter at whatever time
                            seems appropriate. So, please look most
                            carefully at the non-milestone charter text,
                            because that's what's most difficult to
                            change.<br>
                          </blockquote>
                          <br>
                          There were some smaller changes to it in the
                          last proposal that I suggested to undo in my
                          previous email, because we do want to write
                          that third document. Note that "undo" means
                          "back to the version that was at IETF open
                          review. I guess we should avoid semantic
                          changes to that version unless we have very
                          strong reasons.<br>
                        </div>
                      </blockquote>
                      <div><br>
                      </div>
                      <div>I’ll address that in the relevant thread.
                        Keep in mind that the charter is now being
                        reviewed by folks outside the group so it is not
                        surprising that there are new questions coming
                        up (particularly about clarity).  My experience
                        is that this broader review is often important
                        for making explicit some implied context.  I’ve
                        tried to add detail in my changes but maybe I’ve
                        gotten it wrong.  If so, that’s useful to
                        getting us all on the same page.<br>
                      </div>
                      <br>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </blockquote>
      </div>
    </blockquote>
    <br>
    Right about here, it's helpful for me to mention that you folk are
    still talking, and I'm still listening :-)<br>
    <br>
    I hope this note has been useful in navigating unfamiliar territory.
    Most of the people who aren't on the IESG aren't involved in the
    charter process often enough to pick up all the subtleties (see the
    p.s. below).<br>
    <br>
    And thanks for the questions. <br>
    <br>
    Spencer<br>
    <br>
    p.s. Speaking not as the responsible AD, but as Spencer, and
    candidly - I was involved in the charter process for three working
    groups I co-chaired, I spent more than three years watching the IESG
    up close as one of their scribes, I spent just over three years on
    the IAB, and chartering new work is STILL the least obvious thing to
    me that I'm responsible for. If other people are also confused, or
    would like it to work differently, that could be an excellent open
    mike topic for the IETF 91 plenaries (for both the IAB and the IESG,
    I'd say). <br>
    <br>
    Please don't be shy. We (the IESG) want the way we charter new work
    to, well, "work".<br>
  </body>
</html>

--------------070408060706070502070102--


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References: <CALiXHozefTPLWKhXxw42nzy3j89cFM1a74z-jgQdUgFp+PWCaw@mail.gmail.com> <D10404C9-AB90-4C73-9244-F681A2564510@trammell.ch> <FC6D0B0A-D764-42DC-90A9-5D157F924610@ifi.uio.no> <BCDE94D2-BACE-4075-A23B-B237767F45A7@trammell.ch> <E2E8F277-4190-4922-A5E5-C2CB60C34A85@ifi.uio.no> <59E75860-5639-442C-A8A7-BFF9851B0267@trammell.ch> <53F36CF0.3080202@kau.se> <626127AC-E837-4F89-B09B-6F6BD8ADEAD9@cl.cam.ac.uk> <6B55C077-D987-42F3-BDC2-3887B758E024@trammell.ch> <CCCA6B8F-BF58-429F-941B-9A45D0C490BF@ifi.uio.no> <9331EBBD-A2CB-4B57-8AE5-8D5EED7667C2@cl.cam.ac.uk> <D45FD5E7-8F74-48B5-B051-A1A15514E954@ifi.uio.no> <21676519-6ED7-46CE-866D-603D59F0BD9F@gmail.com> <D453C132-C9E2-4B49-8D5B-9625EDFCFEAF@ifi.uio.no>
To: Michael Welzl <michawe@ifi.uio.no>, taps@ietf.org
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On Aug 20, 2014, at 6:00 PM, Michael Welzl <michawe@ifi.uio.no> wrote:

>=20
>=20
> In my opinion, the clearest version is in the charter that went to =
IETF open review:
> ***
> - Specify the subset of those Transport Services, as identified in=20
>   item 1, that end systems supporting TAPS will provide, and give
>   guidance on choosing among available mechanisms and protocols.
> ***
>=20
> which you changed into the "work item 3" text on 26 July, i.e. during =
IETF open review, and documented in the diff file: =
"charter-diff-20140722e-20140726.pdf" that you sent to the list, and =
justified with:
>=20
> "I've been working on a few changes that I think clarify the charter, =
particularly the document goals.  Since I wasn't part of the initial =
discussions I may have misunderstood where there is agreement.  For =
example, the role of the second document seems to be really about =
getting consensus on some requirements for the third."
>=20
> I couldn't see any other input leading to this change. My suggestion =
would be to undo it.

So, I admit that my understanding has been evolving over the course of =
the charter discussion and I=92m perfectly willing to undo prior =
=91improvements=92 that I=92ve made.   Anyone else want to weigh in? =20



>=20
>=20
>> In the third doc I tried to be a little more concrete about what a =
=93support mechanism=94 is:
>>=20
>>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20
>>=20
>>=20
>> Trying to piece an alternate phrasing from the thread I get:
>>=20
>>>> 3) Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services and defining an experiment to evaluate =
such interfaces for incremental deployability.  The associated milestone =
will be scheduled and work on this document will begin when the TAPS =
Transport Services have been specified.=20
>>=20
>> This seems less concrete to me.  I like =93select and engage =
protocols=94 but I=92d like to hear more input from the group.
>=20
> What we did mean when we wrote this was "Happy Eyeballs ++". The Happy =
Eyeballs folks are on the list and have stated interest in continuing it =
here; there were ideas (all in the list archives..) on making it more =
scalable by using it later, i.e. no need to send out so much SYN-style =
traffic so fast; caching information; first asking the other side what =
protocols it supports to only test those that really must be tested. How =
to state this more clearly? Not sure. I think we were all quite happy =
with the "select and engage an appropriate protocol" sentence.

Ah!  I thought there was some objection to =91select and engage=92.  So, =
is the version from the last charter rev acceptable?

3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20

Addressing the matter of whether to include a scheduled milestone for =
the third document or not, let me make a suggestion.  I acknowledge and =
respect that there are several folks in the group invested in seeing =
work take place on the =91engage & select=92 mechanisms and I believe it =
is in the IETF=92s interests in seeing that work mature.  (Indeed, I =
hope there are teams off busily working on implementations now.) =20

However, as I=92ve already made clear, the =91distraction=92 risk to the =
working group progress of a tantalizing research area is significant.  I =
would propose adding the milestone for the third doc with some chair =
ground rules:=20

1. no agenda time will be allocated to that topic until the first two =
docs are mostly complete and stable (in the chair=92s opinion) =20

2. mailing list discussion of such topics during that period may be =
discouraged if it appears it is slowing progress on the docs 1 and 2.  =20=


Spencer would need to approve this and I would want the group to back me =
up if (when) the time comes that some, er, discipline needs to be =
applied.=20

Thoughts?

=97aaron=

--Apple-Mail=_818EF5DF-D453-44A1-890F-02F223A43398
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	charset=windows-1252

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br><div><div>On Aug 20, 2014, at 6:00 PM, Michael =
Welzl &lt;<a href=3D"mailto:michawe@ifi.uio.no">michawe@ifi.uio.no</a>&gt;=
 wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"></div><br><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">In my =
opinion, the clearest version is in the charter that went to IETF open =
review:</div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;">***</div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div>- =
Specify the subset of those Transport Services, as identified =
in&nbsp;</div><div>&nbsp; item 1, that end systems supporting TAPS will =
provide, and give</div><div>&nbsp; guidance on choosing among available =
mechanisms and protocols.</div><div>***</div><div><br></div></div><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;">which you changed into the "work =
item 3" text on 26 July, i.e. during IETF open review, and documented in =
the diff file: "charter-diff-20140722e-20140726.pdf" that you sent to =
the list, and justified with:</div><div style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">"I've =
been working on a few changes that I think clarify the charter, =
particularly the document goals. &nbsp;Since I wasn't part of the =
initial discussions I may have misunderstood where&nbsp;there is =
agreement. &nbsp;For example, the role of the second document seems to =
be really about getting consensus on some requirements for the =
third."</div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">I =
couldn't see any other input leading to this change. My suggestion would =
be to undo it.</div></blockquote><div><br></div><div>So, I admit that my =
understanding has been evolving over the course of the charter =
discussion and I=92m perfectly willing to undo prior =91improvements=92 =
that I=92ve made. &nbsp; Anyone else want to weigh in? =
&nbsp;</div><div><br></div><div><br></div><br><blockquote =
type=3D"cite"><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><blockquote type=3D"cite" style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div><div>In the third doc I =
tried to be a little more concrete about what a =93support mechanism=94 =
is:</div><div><br></div><blockquote type=3D"cite"><span =
style=3D"font-family: 'courier new', monospace;">3) Specify experimental =
support mechanisms to provide the Transport Services identified in work =
item 2. This document will explain how to select and engage an =
appropriate protocol and how to discover which protocols are available =
for a given connection. Further, it will provide a basis for incremental =
deployment. The associated milestone will be scheduled and work on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</span></blockquote></div><div><br></div><div>Trying to =
piece an alternate phrasing from the thread I =
get:</div><div><br></div><div><blockquote type=3D"cite"><blockquote =
type=3D"cite">3) Submit to the IESG an Experimental document =
exploring&nbsp;abstract interfaces to Transport Services and defining an =
experiment to evaluate such interfaces for incremental deployability. =
&nbsp;The associated milestone will be scheduled and work&nbsp;on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</blockquote></blockquote><br></div><div>This seems less =
concrete to me. &nbsp;I like =93select and engage protocols=94 but I=92d =
like to hear more input from the group.</div></div></blockquote><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;"><br></div><div style=3D"font-family:=
 Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;">What we did mean when we wrote this was =
"Happy Eyeballs ++". The Happy Eyeballs folks are on the list and have =
stated interest in continuing it here; there were ideas (all in the list =
archives..) on making it more scalable by using it later, i.e. no need =
to send out so much SYN-style traffic so fast; caching information; =
first asking the other side what protocols it supports to only test =
those that really must be tested. How to state this more clearly? Not =
sure. I think we were all quite happy with the "select and engage an =
appropriate protocol" =
sentence.</div></blockquote><div><br></div><div>Ah! &nbsp;I thought =
there was some objection to =91select and engage=92. &nbsp;So, is the =
version from the last charter rev =
acceptable?</div><div><br></div></div><blockquote style=3D"margin: 0 0 0 =
40px; border: none; padding: 0px;"><div><div>3) Specify experimental =
support mechanisms to provide the Transport Services&nbsp;identified in =
work item 2. This document will explain how to select and engage =
an&nbsp;appropriate protocol and how to discover which protocols are =
available for a given&nbsp;connection. Further, it will provide a basis =
for incremental deployment. The&nbsp;associated milestone will be =
scheduled and work on this document will begin when the&nbsp;TAPS =
Transport Services have been =
specified.&nbsp;</div></div></blockquote><div><div><br></div><div>Addressi=
ng the matter of whether to include a scheduled milestone for the third =
document or not, let me make a suggestion. &nbsp;I acknowledge and =
respect that there are several folks in the group invested in seeing =
work take place on the =91engage &amp; select=92 mechanisms and I =
believe it is in the IETF=92s interests in seeing that work mature. =
&nbsp;(Indeed, I hope there are teams off busily working on =
implementations now.) &nbsp;</div><div><br></div><div>However, as I=92ve =
already made clear, the =91distraction=92 risk to the working group =
progress of a tantalizing research area is significant. &nbsp;I would =
propose adding the milestone for the third doc with some chair ground =
rules:&nbsp;</div><div><br></div><div>1. no agenda time will be =
allocated to that topic until the first two docs are mostly complete and =
stable (in the chair=92s opinion) &nbsp;</div><div><br></div><div>2. =
mailing list discussion of such topics during that period may be =
discouraged if it appears it is slowing progress on the docs 1 and 2. =
&nbsp;&nbsp;</div><div><br></div><div>Spencer would need to approve this =
and I would want the group to back me up if (when) the time comes that =
some, er, discipline needs to be =
applied.&nbsp;</div><div><br></div><div>Thoughts?</div><div><br></div><div=
>=97aaron</div></div></body></html>=

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From nobody Thu Aug 21 08:17:40 2014
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Subject: [Taps] Fwd: Fwd: Re:  So, catching back up on the charter
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So on the Charter, as at:

https://datatracker.ietf.org/doc/charter-ietf-taps/

This is a much longer rant than I wanted, so if you read no more, the
main point is in the next para:

I think the M18 milestone (also called No 3) is well-intentioned, 
especially if targeted as an EXP RFC. To me this never was an interface 
spec, although it needs some form of communication with the App, it is 
the way you find out which protocol to use on an actual path from a set 
of protocols that may offer a service.

Spencer asked the question:

"How important is it for the working group to begin work on the third
deliverable immediately?"

My take, is it is very important that the WG has item 3 (an EXP for
certain, or even a PS!) as their "goal" and starts attracting discussion
and individual IDs that can take this topic forward - I for one, would
want to start thinking about which potential ways could solve the
problems, and to discuss these via the mailing list to try and build an
ID. Yes, there are multiple possibilities, and many pitfalls, but I'd be
fine to try writing one draft, and expect others to collaborate or find
other ideas (probably better - who knows?). As the WG proceeds, it will 
find out if methods are deployable or deplorable - just as mptcp did for 
their protocol, and we could then decide to move forward or even give-up.

Adopting a specific draft early is maybe not so critical at the start,
(and that would be really OK), but I think there needs to be a clear aim
towards finding the mechanisms and identify issues. This is not an easy
topic to bring together, it's worth the work though!!!

What options are there?

--- I think with a Charter that allows this, and possibly milestone for
this topic, the group has a clear goal. The status needs to be EXP,
well a good AD will generally tell the WG if they don't achieve this
level of quality.  Starting as non-EXP and, upgrading the status later
to EXP or expecting to publish as non-WG but widely used RFC seems to me
to be the wrong initial starting point. I personally do not see a
conflict with this activity and any other current IETF activity, so why
the hesitation here?

--- If people really see  Charter text that said there can be no such 
milestone, somehow this forces the group to prepare a "problem 
statement", which although isn't bad, also isn't really the end-goal If 
the protocol work needs a recharter, it punts and delays the decision to 
sometime later - at the first two TAPS meetings there were many 
researchers and people from industry around, all saying things, in 
general I observe at the IETF: the longer we punt, the less wide the 
contributions.

So, I suggest:

* Ensure the Charter permits the 3rd milestone (and if necessary try to 
set some bounds to what it will say).

Setting a restriction that requires the IESG to approve a new Charter to
decide whether an EXP transport protocol can be published seems
soooooooo like a "wait-and-we-decide-later" tactic to me. That's bad for
the WG. And then, if our IETF process were to fail to sort this out 
promptly, as-it-seems-it-may, I expect requests from the WG individual 
draft authors to still progress this discussion and design using IDs and 
the WG mailing lists and meetings (albeit with less visibility tha 
having a WG milestone) and then to request to publish something.  If the 
charter forbids this, then a request to publish as independent 
submission to become some sort of less-reviewed de-facto "experimental 
RFC"... I don't see why we would do this.

Hope this is helpful, and people will be joining in this exciting and
hopefully useful venture!

Gorry

NiTS remaining:

/Specify the subset of those Transport Services, as identified in
   item 1, /
- I'd remove this and other very specific references to the milestone
numbers, when published, the AD may adjust milestones, and this doesn't
to me seem to have to redo the charter text.

/The Working Group deliverables will help an application/
programmers
- mixer singular and plural /programmers/programmer/

Bullet:
/Quality-of-Service (QoS) and tunneling mechanisms and services/
I think should be
/definition of new Quality-of-Service (QoS) mechanisms/
- to align with other bullets.







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References: <CALiXHozefTPLWKhXxw42nzy3j89cFM1a74z-jgQdUgFp+PWCaw@mail.gmail.com> <D10404C9-AB90-4C73-9244-F681A2564510@trammell.ch> <FC6D0B0A-D764-42DC-90A9-5D157F924610@ifi.uio.no> <BCDE94D2-BACE-4075-A23B-B237767F45A7@trammell.ch> <E2E8F277-4190-4922-A5E5-C2CB60C34A85@ifi.uio.no> <59E75860-5639-442C-A8A7-BFF9851B0267@trammell.ch> <53F36CF0.3080202@kau.se> <626127AC-E837-4F89-B09B-6F6BD8ADEAD9@cl.cam.ac.uk> <6B55C077-D987-42F3-BDC2-3887B758E024@trammell.ch> <CCCA6B8F-BF58-429F-941B-9A45D0C490BF@ifi.uio.no> <9331EBBD-A2CB-4B57-8AE5-8D5EED7667C2@cl.cam.ac.uk> <D45FD5E7-8F74-48B5-B051-A1A15514E954@ifi.uio.no> <21676519-6ED7-46CE-866D-603D59F0BD9F@gmail.com> <D453C132-C9E2-4B49-8D5B-9625EDFCFEAF@ifi.uio.no> <251580F0-DDDF-4ADA-8985-399B06872962@gmail.com>
To: Aaron Falk <aaron.falk@gmail.com>
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Subject: Re: [Taps] TAPS charter rev 20140818
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hi, Aaron, all,

was just in the middle of trying to catch back up with this thread, =
thanks for giving me a point to hang this off of... :)

Speaking, as Spencer said, for myself (thanks, Spencer!)...

On 21 Aug 2014, at 16:29, Aaron Falk <aaron.falk@gmail.com> wrote:

>=20
> On Aug 20, 2014, at 6:00 PM, Michael Welzl <michawe@ifi.uio.no> wrote:
>=20
>=20
>>=20
>>=20
>>> In the third doc I tried to be a little more concrete about what a =
=93support mechanism=94 is:
>>>=20
>>>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20
>>>=20
>>> Trying to piece an alternate phrasing from the thread I get:
>>>=20
>>>>> 3) Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services and defining an experiment to evaluate =
such interfaces for incremental deployability.  The associated milestone =
will be scheduled and work on this document will begin when the TAPS =
Transport Services have been specified.=20
>>>=20
>>> This seems less concrete to me.  I like =93select and engage =
protocols=94 but I=92d like to hear more input from the group.
>>=20
>> What we did mean when we wrote this was "Happy Eyeballs ++". The =
Happy Eyeballs folks are on the list and have stated interest in =
continuing it here; there were ideas (all in the list archives..) on =
making it more scalable by using it later, i.e. no need to send out so =
much SYN-style traffic so fast; caching information; first asking the =
other side what protocols it supports to only test those that really =
must be tested. How to state this more clearly? Not sure. I think we =
were all quite happy with the "select and engage an appropriate =
protocol" sentence.
>=20
> Ah!  I thought there was some objection to =91select and engage=92.  =
So, is the version from the last charter rev acceptable?
>=20
> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20

This works for me, and it seems to me like that's where we've converged =
(less the final sentence).

> Addressing the matter of whether to include a scheduled milestone for =
the third document or not, let me make a suggestion.  I acknowledge and =
respect that there are several folks in the group invested in seeing =
work take place on the =91engage & select=92 mechanisms and I believe it =
is in the IETF=92s interests in seeing that work mature.  (Indeed, I =
hope there are teams off busily working on implementations now.) =20

Agreed...

> However, as I=92ve already made clear, the =91distraction=92 risk to =
the working group progress of a tantalizing research area is =
significant.

I think there's two points of risk here. One is distraction. On that =
point I'll admit that half the reason I reversed my position on this =
point during discussions in Toronto is that I became convinced that the =
risk of distraction itself is actually lower than the risk of breaking =
this whole process on arguments over distraction, so let's stick a =
milestone on the charter and rely on ourselves to keep things on track.

(The other point of risk is what makes this engineering-research: the =
approach might simply not provide much return, because the set of =
transports that can provide a given interface to are too limited, or =
because the diversity of path brokenness on the Internet is too narrow. =
I hope I'm being pessimistic when I say this, but hedging this bet is =
one of the reasons the IAB Stack Evolution program is exploring other =
divergent-but-related solutions to the problem, simultaneous with TAPS. =
Let's build the thing and find out, though. No rule I can find says we =
only get to try to solve the problem once. :) )

>  I would propose adding the milestone for the third doc with some =
chair ground rules:=20

> 1. no agenda time will be allocated to that topic until the first two =
docs are mostly complete and stable (in the chair=92s opinion) =20

I'd say "on track" as opposed to "mostly complete"... For the first =
document, especially, there will probably be significant editing work =
(compiling subparts of the document from multiple contributors into a =
coherent whole -- I've already volunteered to help out here). So this =
document may be "ready" as far as its feed-in to the happy-transports =
stuff well before it's complete. The second document, probably less so.

> 2. mailing list discussion of such topics during that period may be =
discouraged if it appears it is slowing progress on the docs 1 and 2.  =20=


I'm personally less comfortable with this restriction, mainly because it =
feels kind of punitive (of course, I'd say that the list should discuss =
anything it wants, except how bad the cookies at the snack breaks are).

Isn't it sufficient simply to gate the *submission* of the third =
milestone to the IESG on the *publication* of the first two?

Cheers,

Brian

> Spencer would need to approve this and I would want the group to back =
me up if (when) the time comes that some, er, discipline needs to be =
applied.=20
>=20
> Thoughts?
>=20
> =97aaron
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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To: Aaron Falk <aaron.falk@gmail.com>
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Archived-At: http://mailarchive.ietf.org/arch/msg/taps/ZWVkv0YmbhI4CxXuJWftbJvcRhk
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Subject: Re: [Taps] TAPS charter rev 20140818
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Hi,


On 21. aug. 2014, at 16:29, Aaron Falk wrote:

>=20
> On Aug 20, 2014, at 6:00 PM, Michael Welzl <michawe@ifi.uio.no> wrote:
>=20
>>=20
>>=20
>> In my opinion, the clearest version is in the charter that went to =
IETF open review:
>> ***
>> - Specify the subset of those Transport Services, as identified in=20
>>   item 1, that end systems supporting TAPS will provide, and give
>>   guidance on choosing among available mechanisms and protocols.
>> ***
>>=20
>> which you changed into the "work item 3" text on 26 July, i.e. during =
IETF open review, and documented in the diff file: =
"charter-diff-20140722e-20140726.pdf" that you sent to the list, and =
justified with:
>>=20
>> "I've been working on a few changes that I think clarify the charter, =
particularly the document goals.  Since I wasn't part of the initial =
discussions I may have misunderstood where there is agreement.  For =
example, the role of the second document seems to be really about =
getting consensus on some requirements for the third."
>>=20
>> I couldn't see any other input leading to this change. My suggestion =
would be to undo it.
>=20
> So, I admit that my understanding has been evolving over the course of =
the charter discussion and I=92m perfectly willing to undo prior =
=91improvements=92 that I=92ve made.   Anyone else want to weigh in? =20
>=20
>=20
>=20
>>=20
>>=20
>>> In the third doc I tried to be a little more concrete about what a =
=93support mechanism=94 is:
>>>=20
>>>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20
>>>=20
>>>=20
>>> Trying to piece an alternate phrasing from the thread I get:
>>>=20
>>>>> 3) Submit to the IESG an Experimental document exploring abstract =
interfaces to Transport Services and defining an experiment to evaluate =
such interfaces for incremental deployability.  The associated milestone =
will be scheduled and work on this document will begin when the TAPS =
Transport Services have been specified.=20
>>>=20
>>> This seems less concrete to me.  I like =93select and engage =
protocols=94 but I=92d like to hear more input from the group.
>>=20
>> What we did mean when we wrote this was "Happy Eyeballs ++". The =
Happy Eyeballs folks are on the list and have stated interest in =
continuing it here; there were ideas (all in the list archives..) on =
making it more scalable by using it later, i.e. no need to send out so =
much SYN-style traffic so fast; caching information; first asking the =
other side what protocols it supports to only test those that really =
must be tested. How to state this more clearly? Not sure. I think we =
were all quite happy with the "select and engage an appropriate =
protocol" sentence.
>=20
> Ah!  I thought there was some objection to =91select and engage=92.  =
So, is the version from the last charter rev acceptable?
>=20
> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. The associated milestone will be =
scheduled and work on this document will begin when the TAPS Transport =
Services have been specified.=20

Yes, except that I have requested and still request to remove the last =
sentence ("The associated milestone will be scheduled and work on this =
document will begin when the TAPS Transport Services have been =
specified. "), but this is what you address below.


> Addressing the matter of whether to include a scheduled milestone for =
the third document or not, let me make a suggestion.  I acknowledge and =
respect that there are several folks in the group invested in seeing =
work take place on the =91engage & select=92 mechanisms and I believe it =
is in the IETF=92s interests in seeing that work mature.  (Indeed, I =
hope there are teams off busily working on implementations now.) =20
>=20
> However, as I=92ve already made clear, the =91distraction=92 risk to =
the working group progress of a tantalizing research area is =
significant.  I would propose adding the milestone for the third doc =
with some chair ground rules:=20
>=20
> 1. no agenda time will be allocated to that topic until the first two =
docs are mostly complete and stable (in the chair=92s opinion) =20
>=20
> 2. mailing list discussion of such topics during that period may be =
discouraged if it appears it is slowing progress on the docs 1 and 2.  =20=

>=20
> Spencer would need to approve this and I would want the group to back =
me up if (when) the time comes that some, er, discipline needs to be =
applied.=20
>=20
> Thoughts?

I can understand your concern and have a neutral position on this; I =
guess there are pro's and con's either way... I'll leave this for others =
to discuss.

Cheers,
Michael


--Apple-Mail=_6FA40DC4-704A-4BC0-ADAB-CD17D1277540
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	charset=windows-1252

<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
">Hi,<div><br></div><div><br><div><div>On 21. aug. 2014, at 16:29, Aaron =
Falk wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite">
<meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3DWindows-1252"><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br><div><div>On Aug 20, 2014, at 6:00 PM, Michael =
Welzl &lt;<a href=3D"mailto:michawe@ifi.uio.no">michawe@ifi.uio.no</a>&gt;=
 wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"></div><br><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">In my =
opinion, the clearest version is in the charter that went to IETF open =
review:</div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;">***</div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div>- =
Specify the subset of those Transport Services, as identified =
in&nbsp;</div><div>&nbsp; item 1, that end systems supporting TAPS will =
provide, and give</div><div>&nbsp; guidance on choosing among available =
mechanisms and protocols.</div><div>***</div><div><br></div></div><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;">which you changed into the "work =
item 3" text on 26 July, i.e. during IETF open review, and documented in =
the diff file: "charter-diff-20140722e-20140726.pdf" that you sent to =
the list, and justified with:</div><div style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">"I've =
been working on a few changes that I think clarify the charter, =
particularly the document goals. &nbsp;Since I wasn't part of the =
initial discussions I may have misunderstood where&nbsp;there is =
agreement. &nbsp;For example, the role of the second document seems to =
be really about getting consensus on some requirements for the =
third."</div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">I =
couldn't see any other input leading to this change. My suggestion would =
be to undo it.</div></blockquote><div><br></div><div>So, I admit that my =
understanding has been evolving over the course of the charter =
discussion and I=92m perfectly willing to undo prior =91improvements=92 =
that I=92ve made. &nbsp; Anyone else want to weigh in? =
&nbsp;</div><div><br></div><div><br></div><br><blockquote =
type=3D"cite"><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><br></div><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><blockquote type=3D"cite" style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div><div>In the third doc I =
tried to be a little more concrete about what a =93support mechanism=94 =
is:</div><div><br></div><blockquote type=3D"cite"><span =
style=3D"font-family: 'courier new', monospace;">3) Specify experimental =
support mechanisms to provide the Transport Services identified in work =
item 2. This document will explain how to select and engage an =
appropriate protocol and how to discover which protocols are available =
for a given connection. Further, it will provide a basis for incremental =
deployment. The associated milestone will be scheduled and work on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</span></blockquote></div><div><br></div><div>Trying to =
piece an alternate phrasing from the thread I =
get:</div><div><br></div><div><blockquote type=3D"cite"><blockquote =
type=3D"cite">3) Submit to the IESG an Experimental document =
exploring&nbsp;abstract interfaces to Transport Services and defining an =
experiment to evaluate such interfaces for incremental deployability. =
&nbsp;The associated milestone will be scheduled and work&nbsp;on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;</blockquote></blockquote><br></div><div>This seems less =
concrete to me. &nbsp;I like =93select and engage protocols=94 but I=92d =
like to hear more input from the group.</div></div></blockquote><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;"><br></div><div style=3D"font-family:=
 Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;">What we did mean when we wrote this was =
"Happy Eyeballs ++". The Happy Eyeballs folks are on the list and have =
stated interest in continuing it here; there were ideas (all in the list =
archives..) on making it more scalable by using it later, i.e. no need =
to send out so much SYN-style traffic so fast; caching information; =
first asking the other side what protocols it supports to only test =
those that really must be tested. How to state this more clearly? Not =
sure. I think we were all quite happy with the "select and engage an =
appropriate protocol" =
sentence.</div></blockquote><div><br></div><div>Ah! &nbsp;I thought =
there was some objection to =91select and engage=92. &nbsp;So, is the =
version from the last charter rev =
acceptable?</div><div><br></div></div><blockquote style=3D"margin: 0 0 0 =
40px; border: none; padding: 0px;"><div><div>3) Specify experimental =
support mechanisms to provide the Transport Services&nbsp;identified in =
work item 2. This document will explain how to select and engage =
an&nbsp;appropriate protocol and how to discover which protocols are =
available for a given&nbsp;connection. Further, it will provide a basis =
for incremental deployment. The&nbsp;associated milestone will be =
scheduled and work on this document will begin when the&nbsp;TAPS =
Transport Services have been =
specified.&nbsp;</div></div></blockquote></div></blockquote><div><br></div=
>Yes, except that I have requested and still request to remove the last =
sentence ("The associated milestone will be scheduled and work on this =
document will begin when the TAPS Transport Services have been =
specified.&nbsp;"), but this is what you address =
below.</div><div><br></div><div><br><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div><div>Addressing the matter =
of whether to include a scheduled milestone for the third document or =
not, let me make a suggestion. &nbsp;I acknowledge and respect that =
there are several folks in the group invested in seeing work take place =
on the =91engage &amp; select=92 mechanisms and I believe it is in the =
IETF=92s interests in seeing that work mature. &nbsp;(Indeed, I hope =
there are teams off busily working on implementations now.) =
&nbsp;</div><div><br></div><div>However, as I=92ve already made clear, =
the =91distraction=92 risk to the working group progress of a =
tantalizing research area is significant. &nbsp;I would propose adding =
the milestone for the third doc with some chair ground =
rules:&nbsp;</div><div><br></div><div>1. no agenda time will be =
allocated to that topic until the first two docs are mostly complete and =
stable (in the chair=92s opinion) &nbsp;</div><div><br></div><div>2. =
mailing list discussion of such topics during that period may be =
discouraged if it appears it is slowing progress on the docs 1 and 2. =
&nbsp;&nbsp;</div><div><br></div><div>Spencer would need to approve this =
and I would want the group to back me up if (when) the time comes that =
some, er, discipline needs to be =
applied.&nbsp;</div><div><br></div><div>Thoughts?</div></div></div></block=
quote><div><br></div></div>I can understand your concern and have a =
neutral position on this; I guess there are pro's and con's either =
way... I'll leave this for others to =
discuss.</div><div><br></div><div>Cheers,</div><div>Michael</div><div><br>=
</div></body></html>=

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Archived-At: http://mailarchive.ietf.org/arch/msg/taps/fd2kt8wNylfNTi4n7NW5fl-HLtw
Subject: Re: [Taps] TAPS charter rev 20140818
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I'm mostly trying to be helpful here, rather than trying to be an AD. 
Ideally, those aren't mutually exclusive, but ...

On 08/21/2014 10:51 AM, Brian Trammell wrote:
> hi, Aaron, all,
>
> was just in the middle of trying to catch back up with this thread, thanks for giving me a point to hang this off of... :)
>
> Speaking, as Spencer said, for myself (thanks, Spencer!)...
>
> On 21 Aug 2014, at 16:29, Aaron Falk <aaron.falk@gmail.com> wrote:
>
>>   I would propose adding the milestone for the third doc with some chair ground rules:
>> 1. no agenda time will be allocated to that topic until the first two docs are mostly complete and stable (in the chair’s opinion)
> I'd say "on track" as opposed to "mostly complete"... For the first document, especially, there will probably be significant editing work (compiling subparts of the document from multiple contributors into a coherent whole -- I've already volunteered to help out here). So this document may be "ready" as far as its feed-in to the happy-transports stuff well before it's complete. The second document, probably less so.

Keeping in mind that we're trying to nail down jelly here, if I were 
co-chairing TAPS, and I'm not, I'd think the goal would be that we can't 
make additional progress on work that's already milestoned - if the 
working group can profitably work on meeting a milestone, that should 
have priority, but if the working group has been through the open 
issues, has a plan of action, and mostly needs to do homework before 
moving forward ... well, face-to-face time is precious, and I wouldn't 
want to send everybody I'm asking them to do home early because of a 
line in the charter.

But, and I can't emphasize this enough, Aaron (who I've asked to serve 
as co-chair) and his Co-chair Still To Be Named have to be comfortable 
with what the charter says the working group will do. So, take my 
opinion as a data point.

>
>> 2. mailing list discussion of such topics during that period may be discouraged if it appears it is slowing progress on the docs 1 and 2.
> I'm personally less comfortable with this restriction, mainly because it feels kind of punitive (of course, I'd say that the list should discuss anything it wants, except how bad the cookies at the snack breaks are).
>
> Isn't it sufficient simply to gate the *submission* of the third milestone to the IESG on the *publication* of the first two?

This one is speaking as an AD - I would be surprised to see the third 
document (which executes the plan the first two documents come up with) 
passing the first two documents in IETF Last Call, but I'd encourage the 
charter to be permissive. Keeping in mind what I said about WG co-chairs 
and comfort, I could imagine that the hard restriction is that I don't 
see Publication Requested for the third document before the first two 
documents are *approved*, but I'm not seeing a reason to hold up the 
Experimental work while the document goes through RFC Editor editing, 
reference hold, or some other thing that gets in the way of an RFC 
appearing to the world.

Does that make sense?

Spencer


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See charter rev below.  Change highlights:
- reverted to earlier 2nd doc description
- added back 3rd doc milestone
- minor cleanup

I'm only attaching the diff to the last rev because it's rather a pain to
generate the other one.

--aaron

Transport Services (taps)


Most Internet applications make use of the Transport Services provided by
TCP (a reliable, in-order stream protocol) or UDP (an unreliable datagram
protocol). We use the term "Transport Service" to mean an end-to-end
facility provided by the transport layer that can only be correctly
provided with information from the application. This information may be
provided at design time, compile time, or run time and may include guidance
from the application on whether the facility in question is required or
simply a preference by the application. Four examples of Transport Services
are reliable delivery, no guarantee of order preservation, content privacy
to in-path devices, and minimal latency.

 Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite
and the LEDBAT congestion control mechanism extend the set of available
Transport Services beyond those provided to applications by TCP and UDP.
For example, SCTP provides potentially faster (than TCP) reliable delivery
for applications because it can accept blocks of data out of order, and
LEDBAT provides low-priority "scavenger" communication.

However, application programmers face difficulty when they use protocols
other than TCP or UDP. Most network stacks ship with only TCP and UDP as
transport protocols.  Many firewalls only pass TCP and UDP and some only
support HTTP over TCP. As a result, using other transport protocols or
building a new protocol over raw sockets risks having an application not
work in many environments. Applications, therefore, must always be able to
fall back to TCP or UDP, or even HTTP in many cases, and once the
application programmer has committed to making an application work on TCP
or UDP or HTTP, there is little incentive to try other transport protocols
before falling back. Further, different protocols can provide the same
services in different ways. Layering decisions must be made (for example,
whether a protocol is used natively or tunneled through UDP).

Because of these complications, programmers often resort to either using
TCP or HTTP or implementing their own customized "transport services" over
UDP. When application developers re-implement transport features already
available elsewhere they open the door to problems that simply using TCP
would have avoided and ensure that the applications can't benefit from
other transport protocols as they become available.

Because even TCP and UDP are not guaranteed to work in all environments
today, some programmers simply give up on using TCP or UDP directly,
relying instead on "HTTP as a Substrate". BCP 56 identified many issues
with this strategy, but assuming that if "any protocol is available on a
given network path and on the hosts that will be communicating, that
protocol will be HTTP" is a reasonable strategy for today's Internet. The
IESG has agreed with this viewpoint enough to publish the WebSocket
protocol on the standards track.

The goal of the TAPS working group is to help application and network stack
programmers by describing an (abstract) interface for applications to make
use of Transport Services. The Working Group deliverables emphasize
defining Transport Services that are important to applications followed by
experimental mechanisms to a) determine if the protocols to provide the
requested services are available on the end points and supported along the
path in the network and b) fall back, i.e., select alternate, possibly
less-preferred, protocols when desired protocols are not available. The
Working Group will not define a richer set of Transport Services for
applications, although the TAPS deliverables could inform proposals for
future chartered work on Transport Services.

The Working Group will:

1) Define a set of Transport Services, prioritizing those provided by
existing IETF protocols and congestion control mechanisms. As a starting
point, the working group will consider services used between two endpoints.

2) Specify the subset of those Transport Services, as identified in item 1,
that end systems supporting TAPS will provide, and give guidance on
choosing among available mechanisms and protocols.  Note that not all the
capabilities of IETF Transport protocols need to be exposed as Transport
Services.

3) Specify experimental support mechanisms to provide the Transport
Services identified in work item 2. This document will explain how to
select and engage an appropriate protocol and how to discover which
protocols are available for a given connection. Further, it will provide a
basis for incremental deployment. Work on this document will begin when the
TAPS Transport Services have been specified.

The following topics are out of scope for this Working Group:

- Signaling-based Quality-of-Service (QoS) mechanisms

- Definition of new encapsulations and tunneling mechanisms

- Extension, modification, or creation of transport protocols

- Language-specific APIs

TAPS is not chartered to perform detailed analysis of the security aspects
of transport protocols, but TAPS is being chartered almost simultaneously
with TCPINC, which is developing the TCP extensions to provide
unauthenticated encryption and integrity protection of TCP streams, and
TAPS will work with TCPINC to ensure that TAPS will be able to accommodate
the protocol extensions that TCPINC defines.

Milestones:

M9: Submit an Informational document to the IESG defining a set of services
provided by IETF transport protocols and congestion control mechanisms.
M15: Submit an Informational document to the IESG recommending a minimal
set of Transport Services that end systems should support.
M18: Submit an Experimental document to the IESG specifying one or more
methods to provide applications with the Transport Services identified by
the WG.

M18: Recharter or close.

--f46d04138a57b52d4e05018fcde3
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">See charter rev below. =C2=A0Change highlights:=C2=A0<br><=
div>- reverted to earlier 2nd doc description</div><div>- added back 3rd do=
c milestone</div><div>- minor cleanup<br></div><div><br></div><div>I&#39;m =
only attaching the diff to the last rev because it&#39;s rather a pain to g=
enerate the other one.</div>
<div><br></div><div>--aaron</div><div><br></div><div>
















<p class=3D"MsoNormal" style=3D"background-image:initial;background-repeat:=
initial"><span style=3D"color:rgb(68,68,68);font-family:&#39;Courier New&#3=
9;;font-size:10pt">Transport Services (taps)=C2=A0</span><br></p><p class=
=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(6=
8,68,68);background-image:initial;background-repeat:initial">
<br>
Most Internet applications make use of the Transport Services provided by T=
CP
(a reliable, in-order stream protocol) or UDP (an unreliable datagram
protocol). We use the term &quot;Transport Service&quot; to mean an end-to-=
end
facility provided by the transport layer that can only be correctly provide=
d
with information from the application. This information may be provided at
design time, compile time, or run time and may include guidance from the
application on whether the facility in question is required or simply a
preference by the application.=C2=A0Four examples of Transport Services are
reliable delivery, no guarantee of order preservation, content privacy to
in-path devices, and minimal latency.<br>
<br>
</span></p>

<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&#39;Couri=
er New&#39;;color:rgb(68,68,68);background-image:initial;background-repeat:=
initial">Transport
protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and the LEDBA=
T
congestion control mechanism extend the set of available Transport Services
beyond those provided to applications by TCP and UDP. For example, SCTP
provides potentially faster (than TCP) reliable delivery for applications b=
ecause
it can accept blocks of data out of order, and LEDBAT provides low-priority
&quot;scavenger&quot; communication.=C2=A0<br>
<br>
However, application programmers face difficulty when they use protocols ot=
her
than TCP or UDP. Most network stacks ship with only TCP and UDP as transpor=
t
protocols. =C2=A0Many firewalls only pass TCP
and UDP and some only support HTTP over TCP. As a result, using other trans=
port
protocols or building a new protocol over raw sockets risks having an
application not work in many environments. Applications, therefore, must al=
ways
be able to fall back to TCP or UDP, or even HTTP in many cases, and once th=
e
application programmer has committed to making an application work on TCP o=
r
UDP or HTTP, there is little incentive to try other transport protocols bef=
ore
falling back. Further, different protocols can provide the same services in
different ways. Layering decisions must be made (for example, whether a
protocol is used natively or tunneled through UDP).=C2=A0<br>
<br>
Because of these complications, programmers often resort to either using TC=
P or
HTTP or implementing their own customized &quot;transport services&quot; ov=
er
UDP. When application developers re-implement transport features already
available elsewhere they open the door to problems that simply using TCP wo=
uld
have avoided and ensure that the applications can&#39;t benefit from other
transport protocols as they become available.=C2=A0<br>
<br>
Because even TCP and UDP are not guaranteed to work in all environments tod=
ay,
some programmers simply give up on using TCP or UDP directly, relying inste=
ad
on &quot;HTTP as a Substrate&quot;. BCP 56 identified many issues with this
strategy, but assuming that if &quot;any protocol is available on a given
network path and on the hosts that will be communicating, that protocol wil=
l be
HTTP&quot; is a reasonable strategy for today&#39;s Internet. The IESG has =
agreed
with this viewpoint enough to publish the WebSocket protocol on the standar=
ds
track.=C2=A0<br>
<br>
The goal of the TAPS working group is to help application and network stack
programmers by describing an (abstract) interface for applications to make =
use
of Transport Services. The Working Group deliverables emphasize defining
Transport Services that are important to applications followed by experimen=
tal
mechanisms to a) determine if the protocols to provide the requested servic=
es are
available on the end points and supported along the path in the network and=
 b)
fall back, i.e., select alternate, possibly less-preferred, protocols when
desired protocols are not available. The Working Group will not define a ri=
cher
set of Transport Services for applications, although the TAPS deliverables
could inform proposals for future chartered work on Transport Services.=C2=
=A0<br>
<br>
The Working Group will:<br>
<br>
1) Define a set of Transport Services, prioritizing those provided by exist=
ing
IETF protocols and congestion control mechanisms. As a starting point, the
working group will consider services used between two endpoints.<br>
<br>
2)=C2=A0Specify the subset of those Transport Services, as identified in it=
em
1, that end systems supporting TAPS will provide, and give guidance on choo=
sing
among available mechanisms and protocols.=C2=A0
Note that not all the capabilities of IETF Transport protocols need to
be exposed as Transport Services.<br>
<br>
3) Specify experimental support mechanisms to provide the Transport Service=
s
identified in work item 2. This document will explain how to select and eng=
age
an appropriate protocol and how to discover which protocols are available f=
or a
given connection. Further, it will provide a basis for incremental deployme=
nt. Work
on this document will begin when the TAPS Transport Services have been
specified.=C2=A0<br>
<br>
The following topics are out of scope for this Working Group:=C2=A0<br>
<br>
- Signaling-based Quality-of-Service (QoS) mechanisms=C2=A0<br>
<br>
- Definition of new encapsulations and tunneling mechanisms=C2=A0<br>
<br>
- Extension, modification, or creation of transport protocols=C2=A0<br>
<br>
- Language-specific APIs=C2=A0<br>
<br>
TAPS is not chartered to perform detailed analysis of the security aspects =
of
transport protocols, but TAPS is being chartered almost simultaneously with
TCPINC, which is developing the TCP extensions to provide unauthenticated
encryption and integrity protection of TCP streams, and TAPS will work with
TCPINC to ensure that TAPS will be able to accommodate the protocol extensi=
ons
that TCPINC defines.=C2=A0<br>
<br>
Milestones:=C2=A0<br>
<br>
M9: Submit an Informational document to the IESG defining a set of services
provided by IETF transport protocols and congestion control mechanisms.<br>
M15: Submit an Informational document to the IESG recommending a minimal se=
t of
Transport Services that end systems should support.<br>
M18: Submit an Experimental document to the IESG specifying one or more met=
hods
to provide applications with the Transport Services identified by the WG.</=
span></p>

<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&#39;Couri=
er New&#39;;color:rgb(68,68,68);background-image:initial;background-repeat:=
initial">M18:
Recharter or close.</span></p>

<p class=3D"MsoNormal">=C2=A0</p>

</div></div>

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From: Brian Trammell <ietf@trammell.ch>
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Subject: Re: [Taps] TAPS charter rev 20140826
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hi Aaron,

Thanks for putting this together!

This charter looks good to me.

Cheers,

Brian

On 27 Aug 2014, at 0:27, Aaron Falk <aaron.falk@gmail.com> wrote:

> See charter rev below.  Change highlights:=20
> - reverted to earlier 2nd doc description
> - added back 3rd doc milestone
> - minor cleanup
>=20
> I'm only attaching the diff to the last rev because it's rather a pain =
to generate the other one.
>=20
> --aaron
>=20
> Transport Services (taps)=20
>=20
>=20
> Most Internet applications make use of the Transport Services provided =
by TCP (a reliable, in-order stream protocol) or UDP (an unreliable =
datagram protocol). We use the term "Transport Service" to mean an =
end-to-end facility provided by the transport layer that can only be =
correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time =
and may include guidance from the application on whether the facility in =
question is required or simply a preference by the application. Four =
examples of Transport Services are reliable delivery, no guarantee of =
order preservation, content privacy to in-path devices, and minimal =
latency.
>=20
>=20
> Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and =
UDP-Lite and the LEDBAT congestion control mechanism extend the set of =
available Transport Services beyond those provided to applications by =
TCP and UDP. For example, SCTP provides potentially faster (than TCP) =
reliable delivery for applications because it can accept blocks of data =
out of order, and LEDBAT provides low-priority "scavenger" =
communication.=20
>=20
> However, application programmers face difficulty when they use =
protocols other than TCP or UDP. Most network stacks ship with only TCP =
and UDP as transport protocols.  Many firewalls only pass TCP and UDP =
and some only support HTTP over TCP. As a result, using other transport =
protocols or building a new protocol over raw sockets risks having an =
application not work in many environments. Applications, therefore, must =
always be able to fall back to TCP or UDP, or even HTTP in many cases, =
and once the application programmer has committed to making an =
application work on TCP or UDP or HTTP, there is little incentive to try =
other transport protocols before falling back. Further, different =
protocols can provide the same services in different ways. Layering =
decisions must be made (for example, whether a protocol is used natively =
or tunneled through UDP).=20
>=20
> Because of these complications, programmers often resort to either =
using TCP or HTTP or implementing their own customized "transport =
services" over UDP. When application developers re-implement transport =
features already available elsewhere they open the door to problems that =
simply using TCP would have avoided and ensure that the applications =
can't benefit from other transport protocols as they become available.=20=

>=20
> Because even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track.=20
>=20
> The goal of the TAPS working group is to help application and network =
stack programmers by describing an (abstract) interface for applications =
to make use of Transport Services. The Working Group deliverables =
emphasize defining Transport Services that are important to applications =
followed by experimental mechanisms to a) determine if the protocols to =
provide the requested services are available on the end points and =
supported along the path in the network and b) fall back, i.e., select =
alternate, possibly less-preferred, protocols when desired protocols are =
not available. The Working Group will not define a richer set of =
Transport Services for applications, although the TAPS deliverables =
could inform proposals for future chartered work on Transport Services.=20=

>=20
> The Working Group will:
>=20
> 1) Define a set of Transport Services, prioritizing those provided by =
existing IETF protocols and congestion control mechanisms. As a starting =
point, the working group will consider services used between two =
endpoints.
>=20
> 2) Specify the subset of those Transport Services, as identified in =
item 1, that end systems supporting TAPS will provide, and give guidance =
on choosing among available mechanisms and protocols.  Note that not all =
the capabilities of IETF Transport protocols need to be exposed as =
Transport Services.
>=20
> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. Work on this document will begin =
when the TAPS Transport Services have been specified.=20
>=20
> The following topics are out of scope for this Working Group:=20
>=20
> - Signaling-based Quality-of-Service (QoS) mechanisms=20
>=20
> - Definition of new encapsulations and tunneling mechanisms=20
>=20
> - Extension, modification, or creation of transport protocols=20
>=20
> - Language-specific APIs=20
>=20
> TAPS is not chartered to perform detailed analysis of the security =
aspects of transport protocols, but TAPS is being chartered almost =
simultaneously with TCPINC, which is developing the TCP extensions to =
provide unauthenticated encryption and integrity protection of TCP =
streams, and TAPS will work with TCPINC to ensure that TAPS will be able =
to accommodate the protocol extensions that TCPINC defines.=20
>=20
> Milestones:=20
>=20
> M9: Submit an Informational document to the IESG defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
> M15: Submit an Informational document to the IESG recommending a =
minimal set of Transport Services that end systems should support.
> M18: Submit an Experimental document to the IESG specifying one or =
more methods to provide applications with the Transport Services =
identified by the WG.
>=20
> M18: Recharter or close.
>=20
> =20
> =
<charter-diff-20140818-20140826.pdf>______________________________________=
_________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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Subject: Re: [Taps] TAPS charter rev 20140826
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Hi,

Thanks from me too! I'm also fine with it, great job!


Here are a few SUPER small nits, and I think none of them is necessary =
or "meaningful", it's just cosmetics, from carefully reading the whole =
thing yet again:

- par2: there's a double "and" - I'd replace "...and UDP-Lite and the =
LEDBAT..." with "..., UDP-Lite and the LEDBAT..."
- par 3: I think it would read better if "also" was inserted in the last =
sentence, replacing "Layering decisions must be made" was replace with =
"Layering decisions must also be made", but I'm not a native speaker...
- par 5: (starting with "Because even TCP and UDP"): isn't this =
paragraph logically connected to the previous one? I think they could be =
merged. Also (again, not a native speaker, so not sure) I'd replace =
"Because even TCP and UDP" with "Since even TCP and UDP" just to avoid =
having two sentences start with "Because..." so close to each other. But =
that's really not important and just style.

That's it!

Cheers,
Michael



On 27. aug. 2014, at 00:27, Aaron Falk wrote:

> See charter rev below.  Change highlights:=20
> - reverted to earlier 2nd doc description
> - added back 3rd doc milestone
> - minor cleanup
>=20
> I'm only attaching the diff to the last rev because it's rather a pain =
to generate the other one.
>=20
> --aaron
>=20
> Transport Services (taps)=20
>=20
>=20
> Most Internet applications make use of the Transport Services provided =
by TCP (a reliable, in-order stream protocol) or UDP (an unreliable =
datagram protocol). We use the term "Transport Service" to mean an =
end-to-end facility provided by the transport layer that can only be =
correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time =
and may include guidance from the application on whether the facility in =
question is required or simply a preference by the application. Four =
examples of Transport Services are reliable delivery, no guarantee of =
order preservation, content privacy to in-path devices, and minimal =
latency.
>=20
>=20
> Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and =
UDP-Lite and the LEDBAT congestion control mechanism extend the set of =
available Transport Services beyond those provided to applications by =
TCP and UDP. For example, SCTP provides potentially faster (than TCP) =
reliable delivery for applications because it can accept blocks of data =
out of order, and LEDBAT provides low-priority "scavenger" =
communication.=20
>=20
> However, application programmers face difficulty when they use =
protocols other than TCP or UDP. Most network stacks ship with only TCP =
and UDP as transport protocols.  Many firewalls only pass TCP and UDP =
and some only support HTTP over TCP. As a result, using other transport =
protocols or building a new protocol over raw sockets risks having an =
application not work in many environments. Applications, therefore, must =
always be able to fall back to TCP or UDP, or even HTTP in many cases, =
and once the application programmer has committed to making an =
application work on TCP or UDP or HTTP, there is little incentive to try =
other transport protocols before falling back. Further, different =
protocols can provide the same services in different ways. Layering =
decisions must be made (for example, whether a protocol is used natively =
or tunneled through UDP).=20
>=20
> Because of these complications, programmers often resort to either =
using TCP or HTTP or implementing their own customized "transport =
services" over UDP. When application developers re-implement transport =
features already available elsewhere they open the door to problems that =
simply using TCP would have avoided and ensure that the applications =
can't benefit from other transport protocols as they become available.=20=

>=20
> Because even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track.=20
>=20
> The goal of the TAPS working group is to help application and network =
stack programmers by describing an (abstract) interface for applications =
to make use of Transport Services. The Working Group deliverables =
emphasize defining Transport Services that are important to applications =
followed by experimental mechanisms to a) determine if the protocols to =
provide the requested services are available on the end points and =
supported along the path in the network and b) fall back, i.e., select =
alternate, possibly less-preferred, protocols when desired protocols are =
not available. The Working Group will not define a richer set of =
Transport Services for applications, although the TAPS deliverables =
could inform proposals for future chartered work on Transport Services.=20=

>=20
> The Working Group will:
>=20
> 1) Define a set of Transport Services, prioritizing those provided by =
existing IETF protocols and congestion control mechanisms. As a starting =
point, the working group will consider services used between two =
endpoints.
>=20
> 2) Specify the subset of those Transport Services, as identified in =
item 1, that end systems supporting TAPS will provide, and give guidance =
on choosing among available mechanisms and protocols.  Note that not all =
the capabilities of IETF Transport protocols need to be exposed as =
Transport Services.
>=20
> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. Work on this document will begin =
when the TAPS Transport Services have been specified.=20
>=20
> The following topics are out of scope for this Working Group:=20
>=20
> - Signaling-based Quality-of-Service (QoS) mechanisms=20
>=20
> - Definition of new encapsulations and tunneling mechanisms=20
>=20
> - Extension, modification, or creation of transport protocols=20
>=20
> - Language-specific APIs=20
>=20
> TAPS is not chartered to perform detailed analysis of the security =
aspects of transport protocols, but TAPS is being chartered almost =
simultaneously with TCPINC, which is developing the TCP extensions to =
provide unauthenticated encryption and integrity protection of TCP =
streams, and TAPS will work with TCPINC to ensure that TAPS will be able =
to accommodate the protocol extensions that TCPINC defines.=20
>=20
> Milestones:=20
>=20
> M9: Submit an Informational document to the IESG defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
> M15: Submit an Informational document to the IESG recommending a =
minimal set of Transport Services that end systems should support.
> M18: Submit an Experimental document to the IESG specifying one or =
more methods to provide applications with the Transport Services =
identified by the WG.
>=20
> M18: Recharter or close.
>=20
> =20
> =
<charter-diff-20140818-20140826.pdf>______________________________________=
_________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


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	charset=us-ascii

<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
">Hi,<div><br></div><div>Thanks from me too! I'm also fine with it, =
great job!</div><div><br></div><div><br></div><div>Here are a few SUPER =
small nits, and I think none of them is necessary or "meaningful", it's =
just cosmetics, from carefully reading the whole thing yet =
again:</div><div><br></div><div>- par2: there's a double "and" - I'd =
replace "...and UDP-Lite and the LEDBAT..." with "..., UDP-Lite and the =
LEDBAT..."</div><div>- par 3: I think it would read better if "also" was =
inserted in the last sentence, replacing "Layering decisions must be =
made" was replace with "Layering decisions must also be made", but I'm =
not a native speaker...</div><div>- par 5: (starting with "Because even =
TCP and UDP"): isn't this paragraph logically connected to the previous =
one? I think they could be merged. Also (again, not a native speaker, so =
not sure) I'd replace "Because even TCP and UDP" with "Since even TCP =
and UDP" just to avoid having two sentences start with "Because..." so =
close to each other. But that's really not important and just =
style.</div><div><br></div><div>That's =
it!</div><div><br></div><div>Cheers,</div><div>Michael</div><div><br></div=
><div><br></div><div><br><div><div>On 27. aug. 2014, at 00:27, Aaron =
Falk wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"><div dir=3D"ltr">See charter rev below. &nbsp;Change =
highlights:&nbsp;<br><div>- reverted to earlier 2nd doc =
description</div><div>- added back 3rd doc milestone</div><div>- minor =
cleanup<br></div><div><br></div><div>I'm only attaching the diff to the =
last rev because it's rather a pain to generate the other one.</div>
<div><br></div><div>--aaron</div><div><br></div><div><p =
class=3D"MsoNormal" =
style=3D"background-image:initial;background-repeat:initial"><span =
style=3D"color:rgb(68,68,68);font-family:'Courier =
New';font-size:10pt">Transport Services (taps)&nbsp;</span><br></p><p =
class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:'Courier =
New';color:rgb(68,68,68);background-image:initial;background-repeat:initia=
l">
<br>
Most Internet applications make use of the Transport Services provided =
by TCP
(a reliable, in-order stream protocol) or UDP (an unreliable datagram
protocol). We use the term "Transport Service" to mean an end-to-end
facility provided by the transport layer that can only be correctly =
provided
with information from the application. This information may be provided =
at
design time, compile time, or run time and may include guidance from the
application on whether the facility in question is required or simply a
preference by the application.&nbsp;Four examples of Transport Services =
are
reliable delivery, no guarantee of order preservation, content privacy =
to
in-path devices, and minimal latency.<br>
<br>
</span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:10pt;font-family:'Courier =
New';color:rgb(68,68,68);background-image:initial;background-repeat:initia=
l">Transport
protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and the =
LEDBAT
congestion control mechanism extend the set of available Transport =
Services
beyond those provided to applications by TCP and UDP. For example, SCTP
provides potentially faster (than TCP) reliable delivery for =
applications because
it can accept blocks of data out of order, and LEDBAT provides =
low-priority
"scavenger" communication.&nbsp;<br>
<br>
However, application programmers face difficulty when they use protocols =
other
than TCP or UDP. Most network stacks ship with only TCP and UDP as =
transport
protocols. &nbsp;Many firewalls only pass TCP
and UDP and some only support HTTP over TCP. As a result, using other =
transport
protocols or building a new protocol over raw sockets risks having an
application not work in many environments. Applications, therefore, must =
always
be able to fall back to TCP or UDP, or even HTTP in many cases, and once =
the
application programmer has committed to making an application work on =
TCP or
UDP or HTTP, there is little incentive to try other transport protocols =
before
falling back. Further, different protocols can provide the same services =
in
different ways. Layering decisions must be made (for example, whether a
protocol is used natively or tunneled through UDP).&nbsp;<br>
<br>
Because of these complications, programmers often resort to either using =
TCP or
HTTP or implementing their own customized "transport services" over
UDP. When application developers re-implement transport features already
available elsewhere they open the door to problems that simply using TCP =
would
have avoided and ensure that the applications can't benefit from other
transport protocols as they become available.&nbsp;<br>
<br>
Because even TCP and UDP are not guaranteed to work in all environments =
today,
some programmers simply give up on using TCP or UDP directly, relying =
instead
on "HTTP as a Substrate". BCP 56 identified many issues with this
strategy, but assuming that if "any protocol is available on a given
network path and on the hosts that will be communicating, that protocol =
will be
HTTP" is a reasonable strategy for today's Internet. The IESG has agreed
with this viewpoint enough to publish the WebSocket protocol on the =
standards
track.&nbsp;<br>
<br>
The goal of the TAPS working group is to help application and network =
stack
programmers by describing an (abstract) interface for applications to =
make use
of Transport Services. The Working Group deliverables emphasize defining
Transport Services that are important to applications followed by =
experimental
mechanisms to a) determine if the protocols to provide the requested =
services are
available on the end points and supported along the path in the network =
and b)
fall back, i.e., select alternate, possibly less-preferred, protocols =
when
desired protocols are not available. The Working Group will not define a =
richer
set of Transport Services for applications, although the TAPS =
deliverables
could inform proposals for future chartered work on Transport =
Services.&nbsp;<br>
<br>
The Working Group will:<br>
<br>
1) Define a set of Transport Services, prioritizing those provided by =
existing
IETF protocols and congestion control mechanisms. As a starting point, =
the
working group will consider services used between two endpoints.<br>
<br>
2)&nbsp;Specify the subset of those Transport Services, as identified in =
item
1, that end systems supporting TAPS will provide, and give guidance on =
choosing
among available mechanisms and protocols.&nbsp;
Note that not all the capabilities of IETF Transport protocols need to
be exposed as Transport Services.<br>
<br>
3) Specify experimental support mechanisms to provide the Transport =
Services
identified in work item 2. This document will explain how to select and =
engage
an appropriate protocol and how to discover which protocols are =
available for a
given connection. Further, it will provide a basis for incremental =
deployment. Work
on this document will begin when the TAPS Transport Services have been
specified.&nbsp;<br>
<br>
The following topics are out of scope for this Working Group:&nbsp;<br>
<br>
- Signaling-based Quality-of-Service (QoS) mechanisms&nbsp;<br>
<br>
- Definition of new encapsulations and tunneling mechanisms&nbsp;<br>
<br>
- Extension, modification, or creation of transport protocols&nbsp;<br>
<br>
- Language-specific APIs&nbsp;<br>
<br>
TAPS is not chartered to perform detailed analysis of the security =
aspects of
transport protocols, but TAPS is being chartered almost simultaneously =
with
TCPINC, which is developing the TCP extensions to provide =
unauthenticated
encryption and integrity protection of TCP streams, and TAPS will work =
with
TCPINC to ensure that TAPS will be able to accommodate the protocol =
extensions
that TCPINC defines.&nbsp;<br>
<br>
Milestones:&nbsp;<br>
<br>
M9: Submit an Informational document to the IESG defining a set of =
services
provided by IETF transport protocols and congestion control =
mechanisms.<br>
M15: Submit an Informational document to the IESG recommending a minimal =
set of
Transport Services that end systems should support.<br>
M18: Submit an Experimental document to the IESG specifying one or more =
methods
to provide applications with the Transport Services identified by the =
WG.</span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:10pt;font-family:'Courier =
New';color:rgb(68,68,68);background-image:initial;background-repeat:initia=
l">M18:
Recharter or close.</span></p><div>&nbsp;<br =
class=3D"webkit-block-placeholder"></div>

</div></div>
=
<span>&lt;charter-diff-20140818-20140826.pdf&gt;</span>___________________=
____________________________<br>Taps mailing list<br><a =
href=3D"mailto:Taps@ietf.org">Taps@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/taps<br></blockquote></div><br></div></body></html>=

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From nobody Wed Aug 27 00:07:05 2014
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Date: Wed, 27 Aug 2014 08:06:59 +0100
From: gorry@erg.abdn.ac.uk
To: "Aaron Falk" <aaron.falk@gmail.com>
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Subject: Re: [Taps] TAPS charter rev 20140826
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To me, this seems like a good charter to proceed with.

Gorry

> See charter rev below.  Change highlights:
> - reverted to earlier 2nd doc description
> - added back 3rd doc milestone
> - minor cleanup
>
> I'm only attaching the diff to the last rev because it's rather a pain to
> generate the other one.
>
> --aaron
>
> Transport Services (taps)
>
>
> Most Internet applications make use of the Transport Services provided by
> TCP (a reliable, in-order stream protocol) or UDP (an unreliable datagram
> protocol). We use the term "Transport Service" to mean an end-to-end
> facility provided by the transport layer that can only be correctly
> provided with information from the application. This information may be
> provided at design time, compile time, or run time and may include
> guidance
> from the application on whether the facility in question is required or
> simply a preference by the application. Four examples of Transport
> Services
> are reliable delivery, no guarantee of order preservation, content privacy
> to in-path devices, and minimal latency.
>
>  Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite
> and the LEDBAT congestion control mechanism extend the set of available
> Transport Services beyond those provided to applications by TCP and UDP.
> For example, SCTP provides potentially faster (than TCP) reliable delivery
> for applications because it can accept blocks of data out of order, and
> LEDBAT provides low-priority "scavenger" communication.
>
> However, application programmers face difficulty when they use protocols
> other than TCP or UDP. Most network stacks ship with only TCP and UDP as
> transport protocols.  Many firewalls only pass TCP and UDP and some only
> support HTTP over TCP. As a result, using other transport protocols or
> building a new protocol over raw sockets risks having an application not
> work in many environments. Applications, therefore, must always be able to
> fall back to TCP or UDP, or even HTTP in many cases, and once the
> application programmer has committed to making an application work on TCP
> or UDP or HTTP, there is little incentive to try other transport protocols
> before falling back. Further, different protocols can provide the same
> services in different ways. Layering decisions must be made (for example,
> whether a protocol is used natively or tunneled through UDP).
>
> Because of these complications, programmers often resort to either using
> TCP or HTTP or implementing their own customized "transport services" over
> UDP. When application developers re-implement transport features already
> available elsewhere they open the door to problems that simply using TCP
> would have avoided and ensure that the applications can't benefit from
> other transport protocols as they become available.
>
> Because even TCP and UDP are not guaranteed to work in all environments
> today, some programmers simply give up on using TCP or UDP directly,
> relying instead on "HTTP as a Substrate". BCP 56 identified many issues
> with this strategy, but assuming that if "any protocol is available on a
> given network path and on the hosts that will be communicating, that
> protocol will be HTTP" is a reasonable strategy for today's Internet. The
> IESG has agreed with this viewpoint enough to publish the WebSocket
> protocol on the standards track.
>
> The goal of the TAPS working group is to help application and network
> stack
> programmers by describing an (abstract) interface for applications to make
> use of Transport Services. The Working Group deliverables emphasize
> defining Transport Services that are important to applications followed by
> experimental mechanisms to a) determine if the protocols to provide the
> requested services are available on the end points and supported along the
> path in the network and b) fall back, i.e., select alternate, possibly
> less-preferred, protocols when desired protocols are not available. The
> Working Group will not define a richer set of Transport Services for
> applications, although the TAPS deliverables could inform proposals for
> future chartered work on Transport Services.
>
> The Working Group will:
>
> 1) Define a set of Transport Services, prioritizing those provided by
> existing IETF protocols and congestion control mechanisms. As a starting
> point, the working group will consider services used between two
> endpoints.
>
> 2) Specify the subset of those Transport Services, as identified in item
> 1,
> that end systems supporting TAPS will provide, and give guidance on
> choosing among available mechanisms and protocols.  Note that not all the
> capabilities of IETF Transport protocols need to be exposed as Transport
> Services.
>
> 3) Specify experimental support mechanisms to provide the Transport
> Services identified in work item 2. This document will explain how to
> select and engage an appropriate protocol and how to discover which
> protocols are available for a given connection. Further, it will provide a
> basis for incremental deployment. Work on this document will begin when
> the
> TAPS Transport Services have been specified.
>
> The following topics are out of scope for this Working Group:
>
> - Signaling-based Quality-of-Service (QoS) mechanisms
>
> - Definition of new encapsulations and tunneling mechanisms
>
> - Extension, modification, or creation of transport protocols
>
> - Language-specific APIs
>
> TAPS is not chartered to perform detailed analysis of the security aspects
> of transport protocols, but TAPS is being chartered almost simultaneously
> with TCPINC, which is developing the TCP extensions to provide
> unauthenticated encryption and integrity protection of TCP streams, and
> TAPS will work with TCPINC to ensure that TAPS will be able to accommodate
> the protocol extensions that TCPINC defines.
>
> Milestones:
>
> M9: Submit an Informational document to the IESG defining a set of
> services
> provided by IETF transport protocols and congestion control mechanisms.
> M15: Submit an Informational document to the IESG recommending a minimal
> set of Transport Services that end systems should support.
> M18: Submit an Experimental document to the IESG specifying one or more
> methods to provide applications with the Transport Services identified by
> the WG.
>
> M18: Recharter or close.
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps
>



From nobody Wed Aug 27 00:23:02 2014
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Subject: Re: [Taps] TAPS charter rev 20140826
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Looks good to me as well.
Thanks for all your efforts with the charter!

Anna

On 2014-08-27 00:27, Aaron Falk wrote:
> See charter rev below.  Change highlights:
> - reverted to earlier 2nd doc description
> - added back 3rd doc milestone
> - minor cleanup
>
> I'm only attaching the diff to the last rev because it's rather a pain 
> to generate the other one.
>
> --aaron
>
> Transport Services (taps)
>
>
> Most Internet applications make use of the Transport Services provided 
> by TCP (a reliable, in-order stream protocol) or UDP (an unreliable 
> datagram protocol). We use the term "Transport Service" to mean an 
> end-to-end facility provided by the transport layer that can only be 
> correctly provided with information from the application. This 
> information may be provided at design time, compile time, or run time 
> and may include guidance from the application on whether the facility 
> in question is required or simply a preference by the 
> application. Four examples of Transport Services are reliable 
> delivery, no guarantee of order preservation, content privacy to 
> in-path devices, and minimal latency.
>
> Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and 
> UDP-Lite and the LEDBAT congestion control mechanism extend the set of 
> available Transport Services beyond those provided to applications by 
> TCP and UDP. For example, SCTP provides potentially faster (than TCP) 
> reliable delivery for applications because it can accept blocks of 
> data out of order, and LEDBAT provides low-priority "scavenger" 
> communication.
>
> However, application programmers face difficulty when they use 
> protocols other than TCP or UDP. Most network stacks ship with only 
> TCP and UDP as transport protocols.  Many firewalls only pass TCP and 
> UDP and some only support HTTP over TCP. As a result, using other 
> transport protocols or building a new protocol over raw sockets risks 
> having an application not work in many environments. Applications, 
> therefore, must always be able to fall back to TCP or UDP, or even 
> HTTP in many cases, and once the application programmer has committed 
> to making an application work on TCP or UDP or HTTP, there is little 
> incentive to try other transport protocols before falling back. 
> Further, different protocols can provide the same services in 
> different ways. Layering decisions must be made (for example, whether 
> a protocol is used natively or tunneled through UDP).
>
> Because of these complications, programmers often resort to either 
> using TCP or HTTP or implementing their own customized "transport 
> services" over UDP. When application developers re-implement transport 
> features already available elsewhere they open the door to problems 
> that simply using TCP would have avoided and ensure that the 
> applications can't benefit from other transport protocols as they 
> become available.
>
> Because even TCP and UDP are not guaranteed to work in all 
> environments today, some programmers simply give up on using TCP or 
> UDP directly, relying instead on "HTTP as a Substrate". BCP 56 
> identified many issues with this strategy, but assuming that if "any 
> protocol is available on a given network path and on the hosts that 
> will be communicating, that protocol will be HTTP" is a reasonable 
> strategy for today's Internet. The IESG has agreed with this viewpoint 
> enough to publish the WebSocket protocol on the standards track.
>
> The goal of the TAPS working group is to help application and network 
> stack programmers by describing an (abstract) interface for 
> applications to make use of Transport Services. The Working Group 
> deliverables emphasize defining Transport Services that are important 
> to applications followed by experimental mechanisms to a) determine if 
> the protocols to provide the requested services are available on the 
> end points and supported along the path in the network and b) fall 
> back, i.e., select alternate, possibly less-preferred, protocols when 
> desired protocols are not available. The Working Group will not define 
> a richer set of Transport Services for applications, although the TAPS 
> deliverables could inform proposals for future chartered work on 
> Transport Services.
>
> The Working Group will:
>
> 1) Define a set of Transport Services, prioritizing those provided by 
> existing IETF protocols and congestion control mechanisms. As a 
> starting point, the working group will consider services used between 
> two endpoints.
>
> 2) Specify the subset of those Transport Services, as identified in 
> item 1, that end systems supporting TAPS will provide, and give 
> guidance on choosing among available mechanisms and protocols. Note 
> that not all the capabilities of IETF Transport protocols need to be 
> exposed as Transport Services.
>
> 3) Specify experimental support mechanisms to provide the Transport 
> Services identified in work item 2. This document will explain how to 
> select and engage an appropriate protocol and how to discover which 
> protocols are available for a given connection. Further, it will 
> provide a basis for incremental deployment. Work on this document will 
> begin when the TAPS Transport Services have been specified.
>
> The following topics are out of scope for this Working Group:
>
> - Signaling-based Quality-of-Service (QoS) mechanisms
>
> - Definition of new encapsulations and tunneling mechanisms
>
> - Extension, modification, or creation of transport protocols
>
> - Language-specific APIs
>
> TAPS is not chartered to perform detailed analysis of the security 
> aspects of transport protocols, but TAPS is being chartered almost 
> simultaneously with TCPINC, which is developing the TCP extensions to 
> provide unauthenticated encryption and integrity protection of TCP 
> streams, and TAPS will work with TCPINC to ensure that TAPS will be 
> able to accommodate the protocol extensions that TCPINC defines.
>
> Milestones:
>
> M9: Submit an Informational document to the IESG defining a set of 
> services provided by IETF transport protocols and congestion control 
> mechanisms.
> M15: Submit an Informational document to the IESG recommending a 
> minimal set of Transport Services that end systems should support.
> M18: Submit an Experimental document to the IESG specifying one or 
> more methods to provide applications with the Transport Services 
> identified by the WG.
>
> M18: Recharter or close.
>
>
>
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


--------------050405030203010304070602
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<html>
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    <meta content="text/html; charset=ISO-8859-1"
      http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    Looks good to me as well. <br>
    Thanks for all your efforts with the charter!<br>
    <br>
    Anna<br>
    <br>
    <div class="moz-cite-prefix">On 2014-08-27 00:27, Aaron Falk wrote:<br>
    </div>
    <blockquote
cite="mid:CAD62q9W2Y-1KdmZFh2Uaj49h989T1nqaROOOuRntht7i_i5C_g@mail.gmail.com"
      type="cite">
      <div dir="ltr">See charter rev below. &nbsp;Change highlights:&nbsp;<br>
        <div>- reverted to earlier 2nd doc description</div>
        <div>- added back 3rd doc milestone</div>
        <div>- minor cleanup<br>
        </div>
        <div><br>
        </div>
        <div>I'm only attaching the diff to the last rev because it's
          rather a pain to generate the other one.</div>
        <div><br>
        </div>
        <div>--aaron</div>
        <div><br>
        </div>
        <div>
          <p class="MsoNormal"
            style="background-image:initial;background-repeat:initial"><span
              style="color:rgb(68,68,68);font-family:'Courier
              New';font-size:10pt">Transport Services (taps)&nbsp;</span><br>
          </p>
          <p class="MsoNormal">
            <span style="font-size:10pt;font-family:'Courier
New';color:rgb(68,68,68);background-image:initial;background-repeat:initial"><br>
              Most Internet applications make use of the Transport
              Services provided by TCP
              (a reliable, in-order stream protocol) or UDP (an
              unreliable datagram
              protocol). We use the term "Transport Service" to mean an
              end-to-end
              facility provided by the transport layer that can only be
              correctly provided
              with information from the application. This information
              may be provided at
              design time, compile time, or run time and may include
              guidance from the
              application on whether the facility in question is
              required or simply a
              preference by the application.&nbsp;Four examples of Transport
              Services are
              reliable delivery, no guarantee of order preservation,
              content privacy to
              in-path devices, and minimal latency.<br>
              <br>
            </span></p>
          <p class="MsoNormal"><span
              style="font-size:10pt;font-family:'Courier
New';color:rgb(68,68,68);background-image:initial;background-repeat:initial">Transport
protocols
              such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and
              the LEDBAT
              congestion control mechanism extend the set of available
              Transport Services
              beyond those provided to applications by TCP and UDP. For
              example, SCTP
              provides potentially faster (than TCP) reliable delivery
              for applications because
              it can accept blocks of data out of order, and LEDBAT
              provides low-priority
              "scavenger" communication.&nbsp;<br>
              <br>
              However, application programmers face difficulty when they
              use protocols other
              than TCP or UDP. Most network stacks ship with only TCP
              and UDP as transport
              protocols. &nbsp;Many firewalls only pass TCP
              and UDP and some only support HTTP over TCP. As a result,
              using other transport
              protocols or building a new protocol over raw sockets
              risks having an
              application not work in many environments. Applications,
              therefore, must always
              be able to fall back to TCP or UDP, or even HTTP in many
              cases, and once the
              application programmer has committed to making an
              application work on TCP or
              UDP or HTTP, there is little incentive to try other
              transport protocols before
              falling back. Further, different protocols can provide the
              same services in
              different ways. Layering decisions must be made (for
              example, whether a
              protocol is used natively or tunneled through UDP).&nbsp;<br>
              <br>
              Because of these complications, programmers often resort
              to either using TCP or
              HTTP or implementing their own customized "transport
              services" over
              UDP. When application developers re-implement transport
              features already
              available elsewhere they open the door to problems that
              simply using TCP would
              have avoided and ensure that the applications can't
              benefit from other
              transport protocols as they become available.&nbsp;<br>
              <br>
              Because even TCP and UDP are not guaranteed to work in all
              environments today,
              some programmers simply give up on using TCP or UDP
              directly, relying instead
              on "HTTP as a Substrate". BCP 56 identified many issues
              with this
              strategy, but assuming that if "any protocol is available
              on a given
              network path and on the hosts that will be communicating,
              that protocol will be
              HTTP" is a reasonable strategy for today's Internet. The
              IESG has agreed
              with this viewpoint enough to publish the WebSocket
              protocol on the standards
              track.&nbsp;<br>
              <br>
              The goal of the TAPS working group is to help application
              and network stack
              programmers by describing an (abstract) interface for
              applications to make use
              of Transport Services. The Working Group deliverables
              emphasize defining
              Transport Services that are important to applications
              followed by experimental
              mechanisms to a) determine if the protocols to provide the
              requested services are
              available on the end points and supported along the path
              in the network and b)
              fall back, i.e., select alternate, possibly
              less-preferred, protocols when
              desired protocols are not available. The Working Group
              will not define a richer
              set of Transport Services for applications, although the
              TAPS deliverables
              could inform proposals for future chartered work on
              Transport Services.&nbsp;<br>
              <br>
              The Working Group will:<br>
              <br>
              1) Define a set of Transport Services, prioritizing those
              provided by existing
              IETF protocols and congestion control mechanisms. As a
              starting point, the
              working group will consider services used between two
              endpoints.<br>
              <br>
              2)&nbsp;Specify the subset of those Transport Services, as
              identified in item
              1, that end systems supporting TAPS will provide, and give
              guidance on choosing
              among available mechanisms and protocols.&nbsp;
              Note that not all the capabilities of IETF Transport
              protocols need to
              be exposed as Transport Services.<br>
              <br>
              3) Specify experimental support mechanisms to provide the
              Transport Services
              identified in work item 2. This document will explain how
              to select and engage
              an appropriate protocol and how to discover which
              protocols are available for a
              given connection. Further, it will provide a basis for
              incremental deployment. Work
              on this document will begin when the TAPS Transport
              Services have been
              specified.&nbsp;<br>
              <br>
              The following topics are out of scope for this Working
              Group:&nbsp;<br>
              <br>
              - Signaling-based Quality-of-Service (QoS) mechanisms&nbsp;<br>
              <br>
              - Definition of new encapsulations and tunneling
              mechanisms&nbsp;<br>
              <br>
              - Extension, modification, or creation of transport
              protocols&nbsp;<br>
              <br>
              - Language-specific APIs&nbsp;<br>
              <br>
              TAPS is not chartered to perform detailed analysis of the
              security aspects of
              transport protocols, but TAPS is being chartered almost
              simultaneously with
              TCPINC, which is developing the TCP extensions to provide
              unauthenticated
              encryption and integrity protection of TCP streams, and
              TAPS will work with
              TCPINC to ensure that TAPS will be able to accommodate the
              protocol extensions
              that TCPINC defines.&nbsp;<br>
              <br>
              Milestones:&nbsp;<br>
              <br>
              M9: Submit an Informational document to the IESG defining
              a set of services
              provided by IETF transport protocols and congestion
              control mechanisms.<br>
              M15: Submit an Informational document to the IESG
              recommending a minimal set of
              Transport Services that end systems should support.<br>
              M18: Submit an Experimental document to the IESG
              specifying one or more methods
              to provide applications with the Transport Services
              identified by the WG.</span></p>
          <p class="MsoNormal"><span
              style="font-size:10pt;font-family:'Courier
New';color:rgb(68,68,68);background-image:initial;background-repeat:initial">M18:
Recharter
              or close.</span></p>
          <p class="MsoNormal">&nbsp;</p>
        </div>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
Taps mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Taps@ietf.org">Taps@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/taps">https://www.ietf.org/mailman/listinfo/taps</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

--------------050405030203010304070602--


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From: Marie-Jose Montpetit <mariejo@mit.edu>
To: Anna Brunstrom <anna.brunstrom@kau.se>
Thread-Topic: [Taps] TAPS charter rev 20140826
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Date: Wed, 27 Aug 2014 09:36:40 +0000
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Subject: Re: [Taps] TAPS charter rev 20140826
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Yes it looks really good!

Marie-Jos=E9 Montpetit
marie@mjmontpetit.com<mailto:marie@mjmontpetit.com>
mariejo@mit.edu<mailto:mariejo@mit.edu>

On Aug 27, 2014, at 3:23, "Anna Brunstrom" <anna.brunstrom@kau.se<mailto:an=
na.brunstrom@kau.se>> wrote:

Looks good to me as well.
Thanks for all your efforts with the charter!

Anna

On 2014-08-27 00:27, Aaron Falk wrote:
See charter rev below.  Change highlights:
- reverted to earlier 2nd doc description
- added back 3rd doc milestone
- minor cleanup

I'm only attaching the diff to the last rev because it's rather a pain to g=
enerate the other one.

--aaron

Transport Services (taps)

Most Internet applications make use of the Transport Services provided by T=
CP (a reliable, in-order stream protocol) or UDP (an unreliable datagram pr=
otocol). We use the term "Transport Service" to mean an end-to-end facility=
 provided by the transport layer that can only be correctly provided with i=
nformation from the application. This information may be provided at design=
 time, compile time, or run time and may include guidance from the applicat=
ion on whether the facility in question is required or simply a preference =
by the application. Four examples of Transport Services are reliable delive=
ry, no guarantee of order preservation, content privacy to in-path devices,=
 and minimal latency.

Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and=
 the LEDBAT congestion control mechanism extend the set of available Transp=
ort Services beyond those provided to applications by TCP and UDP. For exam=
ple, SCTP provides potentially faster (than TCP) reliable delivery for appl=
ications because it can accept blocks of data out of order, and LEDBAT prov=
ides low-priority "scavenger" communication.

However, application programmers face difficulty when they use protocols ot=
her than TCP or UDP. Most network stacks ship with only TCP and UDP as tran=
sport protocols.  Many firewalls only pass TCP and UDP and some only suppor=
t HTTP over TCP. As a result, using other transport protocols or building a=
 new protocol over raw sockets risks having an application not work in many=
 environments. Applications, therefore, must always be able to fall back to=
 TCP or UDP, or even HTTP in many cases, and once the application programme=
r has committed to making an application work on TCP or UDP or HTTP, there =
is little incentive to try other transport protocols before falling back. F=
urther, different protocols can provide the same services in different ways=
. Layering decisions must be made (for example, whether a protocol is used =
natively or tunneled through UDP).

Because of these complications, programmers often resort to either using TC=
P or HTTP or implementing their own customized "transport services" over UD=
P. When application developers re-implement transport features already avai=
lable elsewhere they open the door to problems that simply using TCP would =
have avoided and ensure that the applications can't benefit from other tran=
sport protocols as they become available.

Because even TCP and UDP are not guaranteed to work in all environments tod=
ay, some programmers simply give up on using TCP or UDP directly, relying i=
nstead on "HTTP as a Substrate". BCP 56 identified many issues with this st=
rategy, but assuming that if "any protocol is available on a given network =
path and on the hosts that will be communicating, that protocol will be HTT=
P" is a reasonable strategy for today's Internet. The IESG has agreed with =
this viewpoint enough to publish the WebSocket protocol on the standards tr=
ack.

The goal of the TAPS working group is to help application and network stack=
 programmers by describing an (abstract) interface for applications to make=
 use of Transport Services. The Working Group deliverables emphasize defini=
ng Transport Services that are important to applications followed by experi=
mental mechanisms to a) determine if the protocols to provide the requested=
 services are available on the end points and supported along the path in t=
he network and b) fall back, i.e., select alternate, possibly less-preferre=
d, protocols when desired protocols are not available. The Working Group wi=
ll not define a richer set of Transport Services for applications, although=
 the TAPS deliverables could inform proposals for future chartered work on =
Transport Services.

The Working Group will:

1) Define a set of Transport Services, prioritizing those provided by exist=
ing IETF protocols and congestion control mechanisms. As a starting point, =
the working group will consider services used between two endpoints.

2) Specify the subset of those Transport Services, as identified in item 1,=
 that end systems supporting TAPS will provide, and give guidance on choosi=
ng among available mechanisms and protocols.  Note that not all the capabil=
ities of IETF Transport protocols need to be exposed as Transport Services.

3) Specify experimental support mechanisms to provide the Transport Service=
s identified in work item 2. This document will explain how to select and e=
ngage an appropriate protocol and how to discover which protocols are avail=
able for a given connection. Further, it will provide a basis for increment=
al deployment. Work on this document will begin when the TAPS Transport Ser=
vices have been specified.

The following topics are out of scope for this Working Group:

- Signaling-based Quality-of-Service (QoS) mechanisms

- Definition of new encapsulations and tunneling mechanisms

- Extension, modification, or creation of transport protocols

- Language-specific APIs

TAPS is not chartered to perform detailed analysis of the security aspects =
of transport protocols, but TAPS is being chartered almost simultaneously w=
ith TCPINC, which is developing the TCP extensions to provide unauthenticat=
ed encryption and integrity protection of TCP streams, and TAPS will work w=
ith TCPINC to ensure that TAPS will be able to accommodate the protocol ext=
ensions that TCPINC defines.

Milestones:

M9: Submit an Informational document to the IESG defining a set of services=
 provided by IETF transport protocols and congestion control mechanisms.
M15: Submit an Informational document to the IESG recommending a minimal se=
t of Transport Services that end systems should support.
M18: Submit an Experimental document to the IESG specifying one or more met=
hods to provide applications with the Transport Services identified by the =
WG.
M18: Recharter or close.




_______________________________________________
Taps mailing list
Taps@ietf.org<mailto:Taps@ietf.org>
https://www.ietf.org/mailman/listinfo/taps


_______________________________________________
Taps mailing list
Taps@ietf.org<mailto:Taps@ietf.org>
https://www.ietf.org/mailman/listinfo/taps

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Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body dir=3D"auto">
<div>Yes it looks really good!<br>
<br>
Marie-Jos=E9 Montpetit
<div><a href=3D"mailto:marie@mjmontpetit.com">marie@mjmontpetit.com</a></di=
v>
<div><a href=3D"mailto:mariejo@mit.edu">mariejo@mit.edu</a></div>
</div>
<div><br>
On Aug 27, 2014, at 3:23, &quot;Anna Brunstrom&quot; &lt;<a href=3D"mailto:=
anna.brunstrom@kau.se">anna.brunstrom@kau.se</a>&gt; wrote:<br>
<br>
</div>
<blockquote type=3D"cite">
<div>Looks good to me as well. <br>
Thanks for all your efforts with the charter!<br>
<br>
Anna<br>
<br>
<div class=3D"moz-cite-prefix">On 2014-08-27 00:27, Aaron Falk wrote:<br>
</div>
<blockquote cite=3D"mid:CAD62q9W2Y-1KdmZFh2Uaj49h989T1nqaROOOuRntht7i_i5C_g=
@mail.gmail.com" type=3D"cite">
<div dir=3D"ltr">See charter rev below. &nbsp;Change highlights:&nbsp;<br>
<div>- reverted to earlier 2nd doc description</div>
<div>- added back 3rd doc milestone</div>
<div>- minor cleanup<br>
</div>
<div><br>
</div>
<div>I'm only attaching the diff to the last rev because it's rather a pain=
 to generate the other one.</div>
<div><br>
</div>
<div>--aaron</div>
<div><br>
</div>
<div>
<p class=3D"MsoNormal" style=3D"background-image:initial;background-repeat:=
initial"><span style=3D"color:rgb(68,68,68);font-family:'Courier
              New';font-size:10pt">Transport Services (taps)&nbsp;</span><b=
r>
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:'Courier
New';color:rgb(68,68,68);background-image:initial;background-repeat:initial=
"><br>
Most Internet applications make use of the Transport Services provided by T=
CP (a reliable, in-order stream protocol) or UDP (an unreliable datagram pr=
otocol). We use the term &quot;Transport Service&quot; to mean an end-to-en=
d facility provided by the transport layer
 that can only be correctly provided with information from the application.=
 This information may be provided at design time, compile time, or run time=
 and may include guidance from the application on whether the facility in q=
uestion is required or simply a
 preference by the application.&nbsp;Four examples of Transport Services ar=
e reliable delivery, no guarantee of order preservation, content privacy to=
 in-path devices, and minimal latency.<br>
<br>
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:'Courier
New';color:rgb(68,68,68);background-image:initial;background-repeat:initial=
">Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite a=
nd the LEDBAT congestion control mechanism
 extend the set of available Transport Services beyond those provided to ap=
plications by TCP and UDP. For example, SCTP provides potentially faster (t=
han TCP) reliable delivery for applications because it can accept blocks of=
 data out of order, and LEDBAT provides
 low-priority &quot;scavenger&quot; communication.&nbsp;<br>
<br>
However, application programmers face difficulty when they use protocols ot=
her than TCP or UDP. Most network stacks ship with only TCP and UDP as tran=
sport protocols. &nbsp;Many firewalls only pass TCP and UDP and some only s=
upport HTTP over TCP. As a result, using
 other transport protocols or building a new protocol over raw sockets risk=
s having an application not work in many environments. Applications, theref=
ore, must always be able to fall back to TCP or UDP, or even HTTP in many c=
ases, and once the application programmer
 has committed to making an application work on TCP or UDP or HTTP, there i=
s little incentive to try other transport protocols before falling back. Fu=
rther, different protocols can provide the same services in different ways.=
 Layering decisions must be made
 (for example, whether a protocol is used natively or tunneled through UDP)=
.&nbsp;<br>
<br>
Because of these complications, programmers often resort to either using TC=
P or HTTP or implementing their own customized &quot;transport services&quo=
t; over UDP. When application developers re-implement transport features al=
ready available elsewhere they open the door
 to problems that simply using TCP would have avoided and ensure that the a=
pplications can't benefit from other transport protocols as they become ava=
ilable.&nbsp;<br>
<br>
Because even TCP and UDP are not guaranteed to work in all environments tod=
ay, some programmers simply give up on using TCP or UDP directly, relying i=
nstead on &quot;HTTP as a Substrate&quot;. BCP 56 identified many issues wi=
th this strategy, but assuming that if &quot;any
 protocol is available on a given network path and on the hosts that will b=
e communicating, that protocol will be HTTP&quot; is a reasonable strategy =
for today's Internet. The IESG has agreed with this viewpoint enough to pub=
lish the WebSocket protocol on the standards
 track.&nbsp;<br>
<br>
The goal of the TAPS working group is to help application and network stack=
 programmers by describing an (abstract) interface for applications to make=
 use of Transport Services. The Working Group deliverables emphasize defini=
ng Transport Services that are important
 to applications followed by experimental mechanisms to a) determine if the=
 protocols to provide the requested services are available on the end point=
s and supported along the path in the network and b) fall back, i.e., selec=
t alternate, possibly less-preferred,
 protocols when desired protocols are not available. The Working Group will=
 not define a richer set of Transport Services for applications, although t=
he TAPS deliverables could inform proposals for future chartered work on Tr=
ansport Services.&nbsp;<br>
<br>
The Working Group will:<br>
<br>
1) Define a set of Transport Services, prioritizing those provided by exist=
ing IETF protocols and congestion control mechanisms. As a starting point, =
the working group will consider services used between two endpoints.<br>
<br>
2)&nbsp;Specify the subset of those Transport Services, as identified in it=
em 1, that end systems supporting TAPS will provide, and give guidance on c=
hoosing among available mechanisms and protocols.&nbsp; Note that not all t=
he capabilities of IETF Transport protocols
 need to be exposed as Transport Services.<br>
<br>
3) Specify experimental support mechanisms to provide the Transport Service=
s identified in work item 2. This document will explain how to select and e=
ngage an appropriate protocol and how to discover which protocols are avail=
able for a given connection. Further,
 it will provide a basis for incremental deployment. Work on this document =
will begin when the TAPS Transport Services have been specified.&nbsp;<br>
<br>
The following topics are out of scope for this Working Group:&nbsp;<br>
<br>
- Signaling-based Quality-of-Service (QoS) mechanisms&nbsp;<br>
<br>
- Definition of new encapsulations and tunneling mechanisms&nbsp;<br>
<br>
- Extension, modification, or creation of transport protocols&nbsp;<br>
<br>
- Language-specific APIs&nbsp;<br>
<br>
TAPS is not chartered to perform detailed analysis of the security aspects =
of transport protocols, but TAPS is being chartered almost simultaneously w=
ith TCPINC, which is developing the TCP extensions to provide unauthenticat=
ed encryption and integrity protection
 of TCP streams, and TAPS will work with TCPINC to ensure that TAPS will be=
 able to accommodate the protocol extensions that TCPINC defines.&nbsp;<br>
<br>
Milestones:&nbsp;<br>
<br>
M9: Submit an Informational document to the IESG defining a set of services=
 provided by IETF transport protocols and congestion control mechanisms.<br=
>
M15: Submit an Informational document to the IESG recommending a minimal se=
t of Transport Services that end systems should support.<br>
M18: Submit an Experimental document to the IESG specifying one or more met=
hods to provide applications with the Transport Services identified by the =
WG.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:'Courier
New';color:rgb(68,68,68);background-image:initial;background-repeat:initial=
">M18: Recharter or close.</span></p>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
</div>
<br>
<fieldset class=3D"mimeAttachmentHeader"></fieldset> <br>
<pre wrap=3D"">_______________________________________________
Taps mailing list
<a class=3D"moz-txt-link-abbreviated" href=3D"mailto:Taps@ietf.org">Taps@ie=
tf.org</a>
<a class=3D"moz-txt-link-freetext" href=3D"https://www.ietf.org/mailman/lis=
tinfo/taps">https://www.ietf.org/mailman/listinfo/taps</a>
</pre>
</blockquote>
<br>
</div>
</blockquote>
<blockquote type=3D"cite">
<div><span>_______________________________________________</span><br>
<span>Taps mailing list</span><br>
<span><a href=3D"mailto:Taps@ietf.org">Taps@ietf.org</a></span><br>
<span><a href=3D"https://www.ietf.org/mailman/listinfo/taps">https://www.ie=
tf.org/mailman/listinfo/taps</a></span><br>
</div>
</blockquote>
</body>
</html>

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Subject: Re: [Taps] TAPS charter rev 20140826
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On 27 Aug 2014, at 09:22, Anna Brunstrom <anna.brunstrom@kau.se> wrote:

> Looks good to me as well.=20
> Thanks for all your efforts with the charter!
I agree with Anna!

Best regards
Michael
>=20
> Anna
>=20
> On 2014-08-27 00:27, Aaron Falk wrote:
>> See charter rev below.  Change highlights:=20
>> - reverted to earlier 2nd doc description
>> - added back 3rd doc milestone
>> - minor cleanup
>>=20
>> I'm only attaching the diff to the last rev because it's rather a =
pain to generate the other one.
>>=20
>> --aaron
>>=20
>> Transport Services (taps)=20
>>=20
>> Most Internet applications make use of the Transport Services =
provided by TCP (a reliable, in-order stream protocol) or UDP (an =
unreliable datagram protocol). We use the term "Transport Service" to =
mean an end-to-end facility provided by the transport layer that can =
only be correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time =
and may include guidance from the application on whether the facility in =
question is required or simply a preference by the application. Four =
examples of Transport Services are reliable delivery, no guarantee of =
order preservation, content privacy to in-path devices, and minimal =
latency.
>>=20
>>=20
>> Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and =
UDP-Lite and the LEDBAT congestion control mechanism extend the set of =
available Transport Services beyond those provided to applications by =
TCP and UDP. For example, SCTP provides potentially faster (than TCP) =
reliable delivery for applications because it can accept blocks of data =
out of order, and LEDBAT provides low-priority "scavenger" =
communication.=20
>>=20
>> However, application programmers face difficulty when they use =
protocols other than TCP or UDP. Most network stacks ship with only TCP =
and UDP as transport protocols.  Many firewalls only pass TCP and UDP =
and some only support HTTP over TCP. As a result, using other transport =
protocols or building a new protocol over raw sockets risks having an =
application not work in many environments. Applications, therefore, must =
always be able to fall back to TCP or UDP, or even HTTP in many cases, =
and once the application programmer has committed to making an =
application work on TCP or UDP or HTTP, there is little incentive to try =
other transport protocols before falling back. Further, different =
protocols can provide the same services in different ways. Layering =
decisions must be made (for example, whether a protocol is used natively =
or tunneled through UDP).=20
>>=20
>> Because of these complications, programmers often resort to either =
using TCP or HTTP or implementing their own customized "transport =
services" over UDP. When application developers re-implement transport =
features already available elsewhere they open the door to problems that =
simply using TCP would have avoided and ensure that the applications =
can't benefit from other transport protocols as they become available.=20=

>>=20
>> Because even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track.=20
>>=20
>> The goal of the TAPS working group is to help application and network =
stack programmers by describing an (abstract) interface for applications =
to make use of Transport Services. The Working Group deliverables =
emphasize defining Transport Services that are important to applications =
followed by experimental mechanisms to a) determine if the protocols to =
provide the requested services are available on the end points and =
supported along the path in the network and b) fall back, i.e., select =
alternate, possibly less-preferred, protocols when desired protocols are =
not available. The Working Group will not define a richer set of =
Transport Services for applications, although the TAPS deliverables =
could inform proposals for future chartered work on Transport Services.=20=

>>=20
>> The Working Group will:
>>=20
>> 1) Define a set of Transport Services, prioritizing those provided by =
existing IETF protocols and congestion control mechanisms. As a          =
     starting point, the working group will consider services used =
between two endpoints.
>>=20
>> 2) Specify the subset of those Transport Services, as identified in =
item 1, that end systems supporting TAPS will provide, and give guidance =
on choosing among available mechanisms and protocols.  Note that not all =
the capabilities of IETF Transport protocols need to be exposed as =
Transport Services.
>>=20
>> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. Work on this document will begin =
when the TAPS Transport Services have been specified.=20
>>=20
>> The following topics are out of scope for this Working Group:=20
>>=20
>> - Signaling-based Quality-of-Service (QoS) mechanisms=20
>>=20
>> - Definition of new encapsulations and tunneling mechanisms=20
>>=20
>> - Extension, modification, or creation of transport protocols=20
>>=20
>> - Language-specific APIs=20
>>=20
>> TAPS is not chartered to perform detailed analysis of the security =
aspects of transport protocols, but TAPS is being chartered almost       =
        simultaneously with TCPINC, which is developing the TCP =
extensions to provide unauthenticated encryption and integrity =
protection of TCP streams, and TAPS will work with TCPINC to ensure that =
TAPS will be able to accommodate the protocol extensions that TCPINC =
defines.=20
>>=20
>> Milestones:=20
>>=20
>> M9: Submit an Informational document to the IESG defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
>> M15: Submit an Informational document to the IESG recommending a =
minimal set of Transport Services that end systems should support.
>> M18: Submit an Experimental document to the IESG specifying one or =
more methods to provide applications with the Transport Services =
identified by the WG.
>>=20
>> M18: Recharter or close.
>>=20
>> =20
>>=20
>>=20
>> _______________________________________________
>> Taps mailing list
>>=20
>> Taps@ietf.org
>> https://www.ietf.org/mailman/listinfo/taps
>=20
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps


From nobody Wed Aug 27 05:22:19 2014
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Thanks for working on this. Looks go to me. Looking forward to actually 
do the work in a w-g!

Mirja

On 27.08.2014 00:27, Aaron Falk wrote:
> See charter rev below.  Change highlights:
> - reverted to earlier 2nd doc description
> - added back 3rd doc milestone
> - minor cleanup
>
> I'm only attaching the diff to the last rev because it's rather a pain
> to generate the other one.
>
> --aaron
>
> Transport Services (taps)
>
>
> Most Internet applications make use of the Transport Services provided
> by TCP (a reliable, in-order stream protocol) or UDP (an unreliable
> datagram protocol). We use the term "Transport Service" to mean an
> end-to-end facility provided by the transport layer that can only be
> correctly provided with information from the application. This
> information may be provided at design time, compile time, or run time
> and may include guidance from the application on whether the facility in
> question is required or simply a preference by the application. Four
> examples of Transport Services are reliable delivery, no guarantee of
> order preservation, content privacy to in-path devices, and minimal latency.
>
> Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite
> and the LEDBAT congestion control mechanism extend the set of available
> Transport Services beyond those provided to applications by TCP and UDP.
> For example, SCTP provides potentially faster (than TCP) reliable
> delivery for applications because it can accept blocks of data out of
> order, and LEDBAT provides low-priority "scavenger" communication.
>
> However, application programmers face difficulty when they use protocols
> other than TCP or UDP. Most network stacks ship with only TCP and UDP as
> transport protocols.  Many firewalls only pass TCP and UDP and some only
> support HTTP over TCP. As a result, using other transport protocols or
> building a new protocol over raw sockets risks having an application not
> work in many environments. Applications, therefore, must always be able
> to fall back to TCP or UDP, or even HTTP in many cases, and once the
> application programmer has committed to making an application work on
> TCP or UDP or HTTP, there is little incentive to try other transport
> protocols before falling back. Further, different protocols can provide
> the same services in different ways. Layering decisions must be made
> (for example, whether a protocol is used natively or tunneled through UDP).
>
> Because of these complications, programmers often resort to either using
> TCP or HTTP or implementing their own customized "transport services"
> over UDP. When application developers re-implement transport features
> already available elsewhere they open the door to problems that simply
> using TCP would have avoided and ensure that the applications can't
> benefit from other transport protocols as they become available.
>
> Because even TCP and UDP are not guaranteed to work in all environments
> today, some programmers simply give up on using TCP or UDP directly,
> relying instead on "HTTP as a Substrate". BCP 56 identified many issues
> with this strategy, but assuming that if "any protocol is available on a
> given network path and on the hosts that will be communicating, that
> protocol will be HTTP" is a reasonable strategy for today's Internet.
> The IESG has agreed with this viewpoint enough to publish the WebSocket
> protocol on the standards track.
>
> The goal of the TAPS working group is to help application and network
> stack programmers by describing an (abstract) interface for applications
> to make use of Transport Services. The Working Group deliverables
> emphasize defining Transport Services that are important to applications
> followed by experimental mechanisms to a) determine if the protocols to
> provide the requested services are available on the end points and
> supported along the path in the network and b) fall back, i.e., select
> alternate, possibly less-preferred, protocols when desired protocols are
> not available. The Working Group will not define a richer set of
> Transport Services for applications, although the TAPS deliverables
> could inform proposals for future chartered work on Transport Services.
>
> The Working Group will:
>
> 1) Define a set of Transport Services, prioritizing those provided by
> existing IETF protocols and congestion control mechanisms. As a starting
> point, the working group will consider services used between two endpoints.
>
> 2) Specify the subset of those Transport Services, as identified in item
> 1, that end systems supporting TAPS will provide, and give guidance on
> choosing among available mechanisms and protocols. Note that not all the
> capabilities of IETF Transport protocols need to be exposed as Transport
> Services.
>
> 3) Specify experimental support mechanisms to provide the Transport
> Services identified in work item 2. This document will explain how to
> select and engage an appropriate protocol and how to discover which
> protocols are available for a given connection. Further, it will provide
> a basis for incremental deployment. Work on this document will begin
> when the TAPS Transport Services have been specified.
>
> The following topics are out of scope for this Working Group:
>
> - Signaling-based Quality-of-Service (QoS) mechanisms
>
> - Definition of new encapsulations and tunneling mechanisms
>
> - Extension, modification, or creation of transport protocols
>
> - Language-specific APIs
>
> TAPS is not chartered to perform detailed analysis of the security
> aspects of transport protocols, but TAPS is being chartered almost
> simultaneously with TCPINC, which is developing the TCP extensions to
> provide unauthenticated encryption and integrity protection of TCP
> streams, and TAPS will work with TCPINC to ensure that TAPS will be able
> to accommodate the protocol extensions that TCPINC defines.
>
> Milestones:
>
> M9: Submit an Informational document to the IESG defining a set of
> services provided by IETF transport protocols and congestion control
> mechanisms.
> M15: Submit an Informational document to the IESG recommending a minimal
> set of Transport Services that end systems should support.
> M18: Submit an Experimental document to the IESG specifying one or more
> methods to provide applications with the Transport Services identified
> by the WG.
>
> M18: Recharter or close.
>
>
>
> _______________________________________________
> Taps mailing list
> Taps@ietf.org
> https://www.ietf.org/mailman/listinfo/taps
>

-- 
------------------------------------------
Dipl.-Ing. Mirja Kühlewind
Communication Systems Group
Institute TIK, ETH Zürich
Gloriastrasse 35, 8092 Zürich, Switzerland

Room ETZ G93
phone: +41 44 63 26932
email: mirja.kuehlewind@tik.ee.ethz.ch
------------------------------------------


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--f46d040f9f4a8460e905019d37c7
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On Wed, Aug 27, 2014 at 3:01 AM, Michael Welzl <michawe@ifi.uio.no> wrote:

> Hi,
>
> Thanks from me too! I'm also fine with it, great job!
>
>
> Here are a few SUPER small nits, and I think none of them is necessary or
> "meaningful", it's just cosmetics, from carefully reading the whole thing
> yet again:
>
> - par2: there's a double "and" - I'd replace "...and UDP-Lite and the
> LEDBAT..." with "..., UDP-Lite and the LEDBAT..."
>

This is an english thing.  We're adding a list of protocols ending in
UDP-Lite to a congestion control mechanism (LEDBAT).  I think it is correct
as written.


> - par 3: I think it would read better if "also" was inserted in the last
> sentence, replacing "Layering decisions must be made" was replace with
> "Layering decisions must also be made", but I'm not a native speaker...
>

Yup.  Fixed.


> - par 5: (starting with "Because even TCP and UDP"): isn't this paragraph
> logically connected to the previous one? I think they could be merged. Also
> (again, not a native speaker, so not sure) I'd replace "Because even TCP
> and UDP" with "Since even TCP and UDP" just to avoid having two sentences
> start with "Because..." so close to each other. But that's really not
> important and just style.
>

Combined the paras.  See below.


Transport Services (taps)

Most Internet applications make use of the Transport Services provided by
TCP (a reliable, in-order stream protocol) or UDP (an unreliable datagram
protocol). We use the term "Transport Service" to mean an end-to-end
facility provided by the transport layer that can only be correctly
provided with information from the application. This information may be
provided at design time, compile time, or run time and may include guidance
from the application on whether the facility in question is required or
simply a preference by the application. Four examples of Transport Services
are reliable delivery, no guarantee of order preservation, content privacy
to in-path devices, and minimal latency.

 Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite
and the LEDBAT congestion control mechanism extend the set of available
Transport Services beyond those provided to applications by TCP and UDP.
For example, SCTP provides potentially faster (than TCP) reliable delivery
for applications because it can accept blocks of data out of order, and
LEDBAT provides low-priority "scavenger" communication.

However, application programmers face difficulty when they use protocols
other than TCP or UDP. Most network stacks ship with only TCP and UDP as
transport protocols.  Many firewalls only pass TCP and UDP and some only
support HTTP over TCP. As a result, using other transport protocols or
building a new protocol over raw sockets risks having an application not
work in many environments. Applications, therefore, must always be able to
fall back to TCP or UDP, or even HTTP in many cases, and once the
application programmer has committed to making an application work on TCP
or UDP or HTTP, there is little incentive to try other transport protocols
before falling back. Further, different protocols can provide the same
services in different ways. Layering decisions must also be made (for
example, whether a protocol is used natively or tunneled through UDP).

Because of these complications, programmers often resort to either using
TCP or HTTP or implementing their own customized "transport services" over
UDP. When application developers re-implement transport features already
available elsewhere they open the door to problems that simply using TCP
would have avoided and ensure that the applications can't benefit from
other transport protocols as they become available. And, since even TCP and
UDP are not guaranteed to work in all environments today, some programmers
simply give up on using TCP or UDP directly, relying instead on "HTTP as a
Substrate". BCP 56 identified many issues with this strategy, but assuming
that if "any protocol is available on a given network path and on the hosts
that will be communicating, that protocol will be HTTP" is a reasonable
strategy for today's Internet. The IESG has agreed with this viewpoint
enough to publish the WebSocket protocol on the standards track.

The goal of the TAPS working group is to help application and network stack
programmers by describing an (abstract) interface for applications to make
use of Transport Services. The Working Group deliverables emphasize
defining Transport Services that are important to applications followed by
experimental mechanisms to a) determine if the protocols to provide the
requested services are available on the end points and supported along the
path in the network and b) fall back, i.e., select alternate, possibly
less-preferred, protocols when desired protocols are not available. The
Working Group will not define a richer set of Transport Services for
applications, although the TAPS deliverables could inform proposals for
future chartered work on Transport Services.

The Working Group will:

1) Define a set of Transport Services, prioritizing those provided by
existing IETF protocols and congestion control mechanisms. As a starting
point, the working group will consider services used between two endpoints.

2) Specify the subset of those Transport Services, as identified in item 1,
that end systems supporting TAPS will provide, and give guidance on
choosing among available mechanisms and protocols.  Note that not all the
capabilities of IETF Transport protocols need to be exposed as Transport
Services.

3) Specify experimental support mechanisms to provide the Transport
Services identified in work item 2. This document will explain how to
select and engage an appropriate protocol and how to discover which
protocols are available for a given connection. Further, it will provide a
basis for incremental deployment. Work on this document will begin when the
TAPS Transport Services have been specified.

The following topics are out of scope for this Working Group:

- Signaling-based Quality-of-Service (QoS) mechanisms

- Definition of new encapsulations and tunneling mechanisms

- Extension, modification, or creation of transport protocols

- Language-specific APIs

TAPS is not chartered to perform detailed analysis of the security aspects
of transport protocols, but TAPS is being chartered almost simultaneously
with TCPINC, which is developing the TCP extensions to provide
unauthenticated encryption and integrity protection of TCP streams, and
TAPS will work with TCPINC to ensure that TAPS will be able to accommodate
the protocol extensions that TCPINC defines.

Milestones:

M9: Submit an Informational document to the IESG defining a set of services
provided by IETF transport protocols and congestion control mechanisms.
M15: Submit an Informational document to the IESG recommending a minimal
set of Transport Services that end systems should support.
M18: Submit an Experimental document to the IESG specifying one or more
methods to provide applications with the Transport Services identified by
the WG.

M18: Recharter or close.

--f46d040f9f4a8460e905019d37c7
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Wed, Aug 27, 2014 at 3:01 AM, Michael Welzl <span dir=3D"ltr">&l=
t;<a href=3D"mailto:michawe@ifi.uio.no" target=3D"_blank">michawe@ifi.uio.n=
o</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex"><div style=3D"word-wrap:break-word">Hi,<div><br></div><div=
>Thanks from me too! I&#39;m also fine with it, great job!</div>
<div><br></div><div><br></div><div>Here are a few SUPER small nits, and I t=
hink none of them is necessary or &quot;meaningful&quot;, it&#39;s just cos=
metics, from carefully reading the whole thing yet again:</div><div><br>
</div><div>- par2: there&#39;s a double &quot;and&quot; - I&#39;d replace &=
quot;...and UDP-Lite and the LEDBAT...&quot; with &quot;..., UDP-Lite and t=
he LEDBAT...&quot;</div></div></blockquote><div><br></div><div>This is an e=
nglish thing. =C2=A0We&#39;re adding a list of protocols ending in UDP-Lite=
 to a congestion control mechanism (LEDBAT). =C2=A0I think it is correct as=
 written. =C2=A0</div>
<div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px =
0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-l=
eft-style:solid;padding-left:1ex"><div style=3D"word-wrap:break-word"><div>=
- par 3: I think it would read better if &quot;also&quot; was inserted in t=
he last sentence, replacing &quot;Layering decisions must be made&quot; was=
 replace with &quot;Layering decisions must also be made&quot;, but I&#39;m=
 not a native speaker...</div>
</div></blockquote><div><br></div><div>Yup. =C2=A0Fixed.</div><div>=C2=A0</=
div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bor=
der-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:sol=
id;padding-left:1ex">
<div style=3D"word-wrap:break-word"><div>- par 5: (starting with &quot;Beca=
use even TCP and UDP&quot;): isn&#39;t this paragraph logically connected t=
o the previous one? I think they could be merged. Also (again, not a native=
 speaker, so not sure) I&#39;d replace &quot;Because even TCP and UDP&quot;=
 with &quot;Since even TCP and UDP&quot; just to avoid having two sentences=
 start with &quot;Because...&quot; so close to each other. But that&#39;s r=
eally not important and just style.</div>
</div></blockquote><div><br></div><div>Combined the paras. =C2=A0See below.=
</div><div><br></div><div><br></div><div>
















<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&#39;Couri=
er New&#39;;color:rgb(68,68,68);background-image:initial;background-repeat:=
initial">Transport
Services (taps)=C2=A0<br>
<br>
Most Internet applications make use of the Transport Services provided by T=
CP
(a reliable, in-order stream protocol) or UDP (an unreliable datagram
protocol). We use the term &quot;Transport Service&quot; to mean an end-to-=
end
facility provided by the transport layer that can only be correctly provide=
d
with information from the application. This information may be provided at
design time, compile time, or run time and may include guidance from the
application on whether the facility in question is required or simply a
preference by the application.=C2=A0Four examples of Transport Services are
reliable delivery, no guarantee of order preservation, content privacy to
in-path devices, and minimal latency.<br>
<br>
</span></p>

<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&#39;Couri=
er New&#39;;color:rgb(68,68,68);background-image:initial;background-repeat:=
initial">Transport
protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and the LEDBA=
T
congestion control mechanism extend the set of available Transport Services
beyond those provided to applications by TCP and UDP. For example, SCTP
provides potentially faster (than TCP) reliable delivery for applications b=
ecause
it can accept blocks of data out of order, and LEDBAT provides low-priority
&quot;scavenger&quot; communication.=C2=A0<br>
<br>
However, application programmers face difficulty when they use protocols ot=
her
than TCP or UDP. Most network stacks ship with only TCP and UDP as transpor=
t
protocols. =C2=A0Many firewalls only pass TCP
and UDP and some only support HTTP over TCP. As a result, using other trans=
port
protocols or building a new protocol over raw sockets risks having an
application not work in many environments. Applications, therefore, must al=
ways
be able to fall back to TCP or UDP, or even HTTP in many cases, and once th=
e
application programmer has committed to making an application work on TCP o=
r
UDP or HTTP, there is little incentive to try other transport protocols bef=
ore
falling back. Further, different protocols can provide the same services in
different ways. Layering decisions must also be made (for example, whether =
a
protocol is used natively or tunneled through UDP).=C2=A0<br>
<br>
Because of these complications, programmers often resort to either using TC=
P or
HTTP or implementing their own customized &quot;transport services&quot; ov=
er
UDP. When application developers re-implement transport features already
available elsewhere they open the door to problems that simply using TCP wo=
uld
have avoided and ensure that the applications can&#39;t benefit from other
transport protocols as they become available.=C2=A0And, since even TCP and =
UDP
are not guaranteed to work in all environments today, some programmers simp=
ly
give up on using TCP or UDP directly, relying instead on &quot;HTTP as a
Substrate&quot;. BCP 56 identified many issues with this strategy, but assu=
ming
that if &quot;any protocol is available on a given network path and on the
hosts that will be communicating, that protocol will be HTTP&quot; is a
reasonable strategy for today&#39;s Internet. The IESG has agreed with this
viewpoint enough to publish the WebSocket protocol on the standards
track.=C2=A0<br>
<br>
The goal of the TAPS working group is to help application and network stack
programmers by describing an (abstract) interface for applications to make =
use
of Transport Services. The Working Group deliverables emphasize defining
Transport Services that are important to applications followed by experimen=
tal
mechanisms to a) determine if the protocols to provide the requested servic=
es are
available on the end points and supported along the path in the network and=
 b)
fall back, i.e., select alternate, possibly less-preferred, protocols when
desired protocols are not available. The Working Group will not define a ri=
cher
set of Transport Services for applications, although the TAPS deliverables
could inform proposals for future chartered work on Transport Services.=C2=
=A0<br>
<br>
The Working Group will:<br>
<br>
1) Define a set of Transport Services, prioritizing those provided by exist=
ing
IETF protocols and congestion control mechanisms. As a starting point, the
working group will consider services used between two endpoints.<br>
<br>
2)=C2=A0Specify the subset of those Transport Services, as identified in it=
em
1, that end systems supporting TAPS will provide, and give guidance on choo=
sing
among available mechanisms and protocols.=C2=A0
Note that not all the capabilities of IETF Transport protocols need to
be exposed as Transport Services.<br>
<br>
3) Specify experimental support mechanisms to provide the Transport Service=
s
identified in work item 2. This document will explain how to select and eng=
age
an appropriate protocol and how to discover which protocols are available f=
or a
given connection. Further, it will provide a basis for incremental deployme=
nt. Work
on this document will begin when the TAPS Transport Services have been
specified.=C2=A0<br>
<br>
The following topics are out of scope for this Working Group:=C2=A0<br>
<br>
- Signaling-based Quality-of-Service (QoS) mechanisms=C2=A0<br>
<br>
- Definition of new encapsulations and tunneling mechanisms=C2=A0<br>
<br>
- Extension, modification, or creation of transport protocols=C2=A0<br>
<br>
- Language-specific APIs=C2=A0<br>
<br>
TAPS is not chartered to perform detailed analysis of the security aspects =
of
transport protocols, but TAPS is being chartered almost simultaneously with
TCPINC, which is developing the TCP extensions to provide unauthenticated
encryption and integrity protection of TCP streams, and TAPS will work with
TCPINC to ensure that TAPS will be able to accommodate the protocol extensi=
ons
that TCPINC defines.=C2=A0<br>
<br>
Milestones:=C2=A0<br>
<br>
M9: Submit an Informational document to the IESG defining a set of services
provided by IETF transport protocols and congestion control mechanisms.<br>
M15: Submit an Informational document to the IESG recommending a minimal se=
t of
Transport Services that end systems should support.<br>
M18: Submit an Experimental document to the IESG specifying one or more met=
hods
to provide applications with the Transport Services identified by the WG.</=
span></p>

<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&#39;Couri=
er New&#39;;color:rgb(68,68,68);background-image:initial;background-repeat:=
initial">M18:
Recharter or close.</span></p>

<p class=3D"MsoNormal">=C2=A0</p>

</div><div><br></div></div></div></div>

--f46d040f9f4a8460e905019d37c7--


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Subject: Re: [Taps] TAPS charter rev 20140826
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Great, thanks!

Cheers,
Michael


On 27. aug. 2014, at 16:27, Aaron Falk wrote:

>=20
>=20
>=20
> On Wed, Aug 27, 2014 at 3:01 AM, Michael Welzl <michawe@ifi.uio.no> =
wrote:
> Hi,
>=20
> Thanks from me too! I'm also fine with it, great job!
>=20
>=20
> Here are a few SUPER small nits, and I think none of them is necessary =
or "meaningful", it's just cosmetics, from carefully reading the whole =
thing yet again:
>=20
> - par2: there's a double "and" - I'd replace "...and UDP-Lite and the =
LEDBAT..." with "..., UDP-Lite and the LEDBAT..."
>=20
> This is an english thing.  We're adding a list of protocols ending in =
UDP-Lite to a congestion control mechanism (LEDBAT).  I think it is =
correct as written. =20
> =20
> - par 3: I think it would read better if "also" was inserted in the =
last sentence, replacing "Layering decisions must be made" was replace =
with "Layering decisions must also be made", but I'm not a native =
speaker...
>=20
> Yup.  Fixed.
> =20
> - par 5: (starting with "Because even TCP and UDP"): isn't this =
paragraph logically connected to the previous one? I think they could be =
merged. Also (again, not a native speaker, so not sure) I'd replace =
"Because even TCP and UDP" with "Since even TCP and UDP" just to avoid =
having two sentences start with "Because..." so close to each other. But =
that's really not important and just style.
>=20
> Combined the paras.  See below.
>=20
>=20
> Transport Services (taps)=20
>=20
> Most Internet applications make use of the Transport Services provided =
by TCP (a reliable, in-order stream protocol) or UDP (an unreliable =
datagram protocol). We use the term "Transport Service" to mean an =
end-to-end facility provided by the transport layer that can only be =
correctly provided with information from the application. This =
information may be provided at design time, compile time, or run time =
and may include guidance from the application on whether the facility in =
question is required or simply a preference by the application. Four =
examples of Transport Services are reliable delivery, no guarantee of =
order preservation, content privacy to in-path devices, and minimal =
latency.
>=20
>=20
> Transport protocols such as SCTP, DCCP, WebSockets, MPTCP, and =
UDP-Lite and the LEDBAT congestion control mechanism extend the set of =
available Transport Services beyond those provided to applications by =
TCP and UDP. For example, SCTP provides potentially faster (than TCP) =
reliable delivery for applications because it can accept blocks of data =
out of order, and LEDBAT provides low-priority "scavenger" =
communication.=20
>=20
> However, application programmers face difficulty when they use =
protocols other than TCP or UDP. Most network stacks ship with only TCP =
and UDP as transport protocols.  Many firewalls only pass TCP and UDP =
and some only support HTTP over TCP. As a result, using other transport =
protocols or building a new protocol over raw sockets risks having an =
application not work in many environments. Applications, therefore, must =
always be able to fall back to TCP or UDP, or even HTTP in many cases, =
and once the application programmer has committed to making an =
application work on TCP or UDP or HTTP, there is little incentive to try =
other transport protocols before falling back. Further, different =
protocols can provide the same services in different ways. Layering =
decisions must also be made (for example, whether a protocol is used =
natively or tunneled through UDP).=20
>=20
> Because of these complications, programmers often resort to either =
using TCP or HTTP or implementing their own customized "transport =
services" over UDP. When application developers re-implement transport =
features already available elsewhere they open the door to problems that =
simply using TCP would have avoided and ensure that the applications =
can't benefit from other transport protocols as they become available. =
And, since even TCP and UDP are not guaranteed to work in all =
environments today, some programmers simply give up on using TCP or UDP =
directly, relying instead on "HTTP as a Substrate". BCP 56 identified =
many issues with this strategy, but assuming that if "any protocol is =
available on a given network path and on the hosts that will be =
communicating, that protocol will be HTTP" is a reasonable strategy for =
today's Internet. The IESG has agreed with this viewpoint enough to =
publish the WebSocket protocol on the standards track.=20
>=20
> The goal of the TAPS working group is to help application and network =
stack programmers by describing an (abstract) interface for applications =
to make use of Transport Services. The Working Group deliverables =
emphasize defining Transport Services that are important to applications =
followed by experimental mechanisms to a) determine if the protocols to =
provide the requested services are available on the end points and =
supported along the path in the network and b) fall back, i.e., select =
alternate, possibly less-preferred, protocols when desired protocols are =
not available. The Working Group will not define a richer set of =
Transport Services for applications, although the TAPS deliverables =
could inform proposals for future chartered work on Transport Services.=20=

>=20
> The Working Group will:
>=20
> 1) Define a set of Transport Services, prioritizing those provided by =
existing IETF protocols and congestion control mechanisms. As a starting =
point, the working group will consider services used between two =
endpoints.
>=20
> 2) Specify the subset of those Transport Services, as identified in =
item 1, that end systems supporting TAPS will provide, and give guidance =
on choosing among available mechanisms and protocols.  Note that not all =
the capabilities of IETF Transport protocols need to be exposed as =
Transport Services.
>=20
> 3) Specify experimental support mechanisms to provide the Transport =
Services identified in work item 2. This document will explain how to =
select and engage an appropriate protocol and how to discover which =
protocols are available for a given connection. Further, it will provide =
a basis for incremental deployment. Work on this document will begin =
when the TAPS Transport Services have been specified.=20
>=20
> The following topics are out of scope for this Working Group:=20
>=20
> - Signaling-based Quality-of-Service (QoS) mechanisms=20
>=20
> - Definition of new encapsulations and tunneling mechanisms=20
>=20
> - Extension, modification, or creation of transport protocols=20
>=20
> - Language-specific APIs=20
>=20
> TAPS is not chartered to perform detailed analysis of the security =
aspects of transport protocols, but TAPS is being chartered almost =
simultaneously with TCPINC, which is developing the TCP extensions to =
provide unauthenticated encryption and integrity protection of TCP =
streams, and TAPS will work with TCPINC to ensure that TAPS will be able =
to accommodate the protocol extensions that TCPINC defines.=20
>=20
> Milestones:=20
>=20
> M9: Submit an Informational document to the IESG defining a set of =
services provided by IETF transport protocols and congestion control =
mechanisms.
> M15: Submit an Informational document to the IESG recommending a =
minimal set of Transport Services that end systems should support.
> M18: Submit an Experimental document to the IESG specifying one or =
more methods to provide applications with the Transport Services =
identified by the WG.
>=20
> M18: Recharter or close.
>=20
> =20
>=20


--Apple-Mail=_0FE4E507-D406-4CE2-B681-158267168348
Content-Transfer-Encoding: 7bit
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	charset=us-ascii

<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Great, thanks!<div><br></div><div>Cheers,</div><div>Michael</div><div><br></div><div><br><div><div>On 27. aug. 2014, at 16:27, Aaron Falk wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Aug 27, 2014 at 3:01 AM, Michael Welzl <span dir="ltr">&lt;<a href="mailto:michawe@ifi.uio.no" target="_blank">michawe@ifi.uio.no</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; position: static; z-index: auto; "><div style="word-wrap:break-word">Hi,<div><br></div><div>Thanks from me too! I'm also fine with it, great job!</div>
<div><br></div><div><br></div><div>Here are a few SUPER small nits, and I think none of them is necessary or "meaningful", it's just cosmetics, from carefully reading the whole thing yet again:</div><div><br>
</div><div>- par2: there's a double "and" - I'd replace "...and UDP-Lite and the LEDBAT..." with "..., UDP-Lite and the LEDBAT..."</div></div></blockquote><div><br></div><div>This is an english thing. &nbsp;We're adding a list of protocols ending in UDP-Lite to a congestion control mechanism (LEDBAT). &nbsp;I think it is correct as written. &nbsp;</div>
<div>&nbsp;</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div style="word-wrap:break-word"><div>- par 3: I think it would read better if "also" was inserted in the last sentence, replacing "Layering decisions must be made" was replace with "Layering decisions must also be made", but I'm not a native speaker...</div>
</div></blockquote><div><br></div><div>Yup. &nbsp;Fixed.</div><div>&nbsp;</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div style="word-wrap:break-word"><div>- par 5: (starting with "Because even TCP and UDP"): isn't this paragraph logically connected to the previous one? I think they could be merged. Also (again, not a native speaker, so not sure) I'd replace "Because even TCP and UDP" with "Since even TCP and UDP" just to avoid having two sentences start with "Because..." so close to each other. But that's really not important and just style.</div>
</div></blockquote><div><br></div><div>Combined the paras. &nbsp;See below.</div><div><br></div><div><br></div><div><p class="MsoNormal"><span style="font-size:10pt;font-family:'Courier New';color:rgb(68,68,68);background-image:initial;background-repeat:initial">Transport
Services (taps)&nbsp;<br>
<br>
Most Internet applications make use of the Transport Services provided by TCP
(a reliable, in-order stream protocol) or UDP (an unreliable datagram
protocol). We use the term "Transport Service" to mean an end-to-end
facility provided by the transport layer that can only be correctly provided
with information from the application. This information may be provided at
design time, compile time, or run time and may include guidance from the
application on whether the facility in question is required or simply a
preference by the application.&nbsp;Four examples of Transport Services are
reliable delivery, no guarantee of order preservation, content privacy to
in-path devices, and minimal latency.<br>
<br>
</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:'Courier New';color:rgb(68,68,68);background-image:initial;background-repeat:initial">Transport
protocols such as SCTP, DCCP, WebSockets, MPTCP, and UDP-Lite and the LEDBAT
congestion control mechanism extend the set of available Transport Services
beyond those provided to applications by TCP and UDP. For example, SCTP
provides potentially faster (than TCP) reliable delivery for applications because
it can accept blocks of data out of order, and LEDBAT provides low-priority
"scavenger" communication.&nbsp;<br>
<br>
However, application programmers face difficulty when they use protocols other
than TCP or UDP. Most network stacks ship with only TCP and UDP as transport
protocols. &nbsp;Many firewalls only pass TCP
and UDP and some only support HTTP over TCP. As a result, using other transport
protocols or building a new protocol over raw sockets risks having an
application not work in many environments. Applications, therefore, must always
be able to fall back to TCP or UDP, or even HTTP in many cases, and once the
application programmer has committed to making an application work on TCP or
UDP or HTTP, there is little incentive to try other transport protocols before
falling back. Further, different protocols can provide the same services in
different ways. Layering decisions must also be made (for example, whether a
protocol is used natively or tunneled through UDP).&nbsp;<br>
<br>
Because of these complications, programmers often resort to either using TCP or
HTTP or implementing their own customized "transport services" over
UDP. When application developers re-implement transport features already
available elsewhere they open the door to problems that simply using TCP would
have avoided and ensure that the applications can't benefit from other
transport protocols as they become available.&nbsp;And, since even TCP and UDP
are not guaranteed to work in all environments today, some programmers simply
give up on using TCP or UDP directly, relying instead on "HTTP as a
Substrate". BCP 56 identified many issues with this strategy, but assuming
that if "any protocol is available on a given network path and on the
hosts that will be communicating, that protocol will be HTTP" is a
reasonable strategy for today's Internet. The IESG has agreed with this
viewpoint enough to publish the WebSocket protocol on the standards
track.&nbsp;<br>
<br>
The goal of the TAPS working group is to help application and network stack
programmers by describing an (abstract) interface for applications to make use
of Transport Services. The Working Group deliverables emphasize defining
Transport Services that are important to applications followed by experimental
mechanisms to a) determine if the protocols to provide the requested services are
available on the end points and supported along the path in the network and b)
fall back, i.e., select alternate, possibly less-preferred, protocols when
desired protocols are not available. The Working Group will not define a richer
set of Transport Services for applications, although the TAPS deliverables
could inform proposals for future chartered work on Transport Services.&nbsp;<br>
<br>
The Working Group will:<br>
<br>
1) Define a set of Transport Services, prioritizing those provided by existing
IETF protocols and congestion control mechanisms. As a starting point, the
working group will consider services used between two endpoints.<br>
<br>
2)&nbsp;Specify the subset of those Transport Services, as identified in item
1, that end systems supporting TAPS will provide, and give guidance on choosing
among available mechanisms and protocols.&nbsp;
Note that not all the capabilities of IETF Transport protocols need to
be exposed as Transport Services.<br>
<br>
3) Specify experimental support mechanisms to provide the Transport Services
identified in work item 2. This document will explain how to select and engage
an appropriate protocol and how to discover which protocols are available for a
given connection. Further, it will provide a basis for incremental deployment. Work
on this document will begin when the TAPS Transport Services have been
specified.&nbsp;<br>
<br>
The following topics are out of scope for this Working Group:&nbsp;<br>
<br>
- Signaling-based Quality-of-Service (QoS) mechanisms&nbsp;<br>
<br>
- Definition of new encapsulations and tunneling mechanisms&nbsp;<br>
<br>
- Extension, modification, or creation of transport protocols&nbsp;<br>
<br>
- Language-specific APIs&nbsp;<br>
<br>
TAPS is not chartered to perform detailed analysis of the security aspects of
transport protocols, but TAPS is being chartered almost simultaneously with
TCPINC, which is developing the TCP extensions to provide unauthenticated
encryption and integrity protection of TCP streams, and TAPS will work with
TCPINC to ensure that TAPS will be able to accommodate the protocol extensions
that TCPINC defines.&nbsp;<br>
<br>
Milestones:&nbsp;<br>
<br>
M9: Submit an Informational document to the IESG defining a set of services
provided by IETF transport protocols and congestion control mechanisms.<br>
M15: Submit an Informational document to the IESG recommending a minimal set of
Transport Services that end systems should support.<br>
M18: Submit an Experimental document to the IESG specifying one or more methods
to provide applications with the Transport Services identified by the WG.</span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:'Courier New';color:rgb(68,68,68);background-image:initial;background-repeat:initial">M18:
Recharter or close.</span></p><div>&nbsp;<br class="webkit-block-placeholder"></div>

</div><div><br></div></div></div></div>
</blockquote></div><br></div></body></html>
--Apple-Mail=_0FE4E507-D406-4CE2-B681-158267168348--


From nobody Wed Aug 27 11:47:36 2014
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Subject: [Taps] State changed: charter-ietf-taps-00-02
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State changed to IESG review.

URL: http://datatracker.ietf.org/doc/charter-ietf-taps/


From nobody Wed Aug 27 11:49:47 2014
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Date: Wed, 27 Aug 2014 13:49:37 -0500
From: Spencer Dawkins <spencerdawkins.ietf@gmail.com>
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References: <CAD62q9XJf1O+6Y-peU_AFu9WVg5N+X-=GXVYKVaeLotexpaydw@mail.gmail.com> <F63D73CA-8989-45A5-9BB3-843CDC51FF10@ifi.uio.no>
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Subject: Re: [Taps] TAPS charter rev 20140826
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Aaron has asked me to review and put the latest revision into the data 
tracker, and I've done so.

Stay tuned for further updates, of course.

And thank all of you for your work on making this happen.

Spencer