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From: "Brian Trammell (IETF)" <ietf@trammell.ch>
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To: IETF IPPM WG <ippm@ietf.org>
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Subject: [ippm] Fwd: New Version Notification for draft-trammell-ippm-spin-00.txt
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Greetings, and happy new year IPPM!

As an individual, no hats:

Following up on some of the discussion we've had on the spin bit as a =
signal (as opposed to as a protocol feature of QUIC) on the IPPM list, =
I've submitted a draft describing the Spin Bit and the supplemental =
Valid Edge Counter signal in a transport-independent way, showing how it =
has been added to QUIC and a (possibly controversial, but definitely =
implementable and deployable) way to add it to TCP.=20

I'd like to ask the WG's opinion on whether it would like to pursue work =
on the measurement of spin signals (including, e.g., heuristics for =
recovering RTT samples from spin observations on networks with lots of =
reordering, as a replacement for VEC) within IPPM.

Thanks, cheers,

Brian, hatless


> Begin forwarded message:
>=20
> From: internet-drafts@ietf.org
> Subject: New Version Notification for draft-trammell-ippm-spin-00.txt
> Date: 9 January 2019 at 12:08:32 CET
> To: "Brian Trammell" <ietf@trammell.ch>
>=20
>=20
> A new version of I-D, draft-trammell-ippm-spin-00.txt
> has been successfully submitted by Brian Trammell and posted to the
> IETF repository.
>=20
> Name:		draft-trammell-ippm-spin
> Revision:	00
> Title:		An Explicit Transport-Layer Signal for Hybrid =
RTT Measurement
> Document date:	2019-01-09
> Group:		Individual Submission
> Pages:		14
> URL:            =
https://www.ietf.org/internet-drafts/draft-trammell-ippm-spin-00.txt
> Status:         =
https://datatracker.ietf.org/doc/draft-trammell-ippm-spin/
> Htmlized:       =
https://tools.ietf.org/html/draft-trammell-ippm-spin-00
> Htmlized:       =
https://datatracker.ietf.org/doc/html/draft-trammell-ippm-spin
>=20
>=20
> Abstract:
>   This document defines an explicit per-flow transport-layer signal =
for
>   hybrid measurement of end-to-end RTT.  This signal consists of three
>   bits: a spin bit, which oscillates once per end-to-end RTT, and a
>   two-bit Valid Edge Counter (VEC), which compensates for loss and
>   reordering of the spin bit to increase fidelity of the signal in =
less
>   than ideal network conditions.  It describes the algorithm for
>   generating the signal, approaches for observing it to passively
>   measure end-to-end latency, and proposes methods for adding it to a
>   variety of IETF transport protocols.
>=20
>=20
>=20
>=20
> Please note that it may take a couple of minutes from the time of =
submission
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> The IETF Secretariat
>=20


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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: "Brian Trammell (IETF)" <ietf@trammell.ch>, IETF IPPM WG <ippm@ietf.org>
Thread-Topic: [ippm] Fwd: New Version Notification for draft-trammell-ippm-spin-00.txt
Thread-Index: AQHUqA99m858ustBeUGjNC6MKNw7IqWm6tQQ
Date: Wed, 9 Jan 2019 13:23:09 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/niW_nYi-bquJ5r8UPj5n8w5P99w>
Subject: Re: [ippm] Fwd: New Version Notification for draft-trammell-ippm-spin-00.txt
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Hi Hatless Brian,

I think it is worthwhile to pursue Tx-independent=20
Spin-bit-like-signal metrics and measurements.

As input to the process, Emile Stephan and I examined
how the current TCP-passive measurement material in
the Registry Initial Contents draft would need to be
modified for Spin-bit, and we captured the results of
our discussion in the Slides for the IPPM Registry drafts=20
presented at the London IETF last year (101).

When there's a spare minute, we can take a look and=20
see what aspects are covered/not-covered in your=20
current draft.

regards from Paris-Saclay,
Al

> -----Original Message-----
> From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of Brian Trammell
> (IETF)
> Sent: Wednesday, January 9, 2019 6:37 AM
> To: IETF IPPM WG <ippm@ietf.org>
> Subject: [ippm] Fwd: New Version Notification for draft-trammell-ippm-
> spin-00.txt
>=20
> Greetings, and happy new year IPPM!
>=20
> As an individual, no hats:
>=20
> Following up on some of the discussion we've had on the spin bit as a
> signal (as opposed to as a protocol feature of QUIC) on the IPPM list,
> I've submitted a draft describing the Spin Bit and the supplemental Valid
> Edge Counter signal in a transport-independent way, showing how it has
> been added to QUIC and a (possibly controversial, but definitely
> implementable and deployable) way to add it to TCP.
>=20
> I'd like to ask the WG's opinion on whether it would like to pursue work
> on the measurement of spin signals (including, e.g., heuristics for
> recovering RTT samples from spin observations on networks with lots of
> reordering, as a replacement for VEC) within IPPM.
>=20
> Thanks, cheers,
>=20
> Brian, hatless
>=20
>=20
> > Begin forwarded message:
> >
> > From: internet-drafts@ietf.org
> > Subject: New Version Notification for draft-trammell-ippm-spin-00.txt
> > Date: 9 January 2019 at 12:08:32 CET
> > To: "Brian Trammell" <ietf@trammell.ch>
> >
> >
> > A new version of I-D, draft-trammell-ippm-spin-00.txt
> > has been successfully submitted by Brian Trammell and posted to the
> > IETF repository.
> >
> > Name:		draft-trammell-ippm-spin
> > Revision:	00
> > Title:		An Explicit Transport-Layer Signal for Hybrid RTT
> Measurement
> > Document date:	2019-01-09
> > Group:		Individual Submission
> > Pages:		14
> > URL:            https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__www.ietf.org_internet-2Ddrafts_draft-2Dtrammell-2Dippm-2Dspin-
> 2D00.txt&d=3DDwICAg&c=3DLFYZ-
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
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> > Status:         https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__datatracker.ietf.org_doc_draft-2Dtrammell-2Dippm-
> 2Dspin_&d=3DDwICAg&c=3DLFYZ-
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> > Htmlized:       https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__tools.ietf.org_html_draft-2Dtrammell-2Dippm-2Dspin-
> 2D00&d=3DDwICAg&c=3DLFYZ-
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
YX0Kx
> f6yGQ7ys3kZW_8&s=3DkBIhxR27tuQYuTF2x3gJ4xllcRRL5bE9n4VszgAa4r8&e=3D
> > Htmlized:       https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__datatracker.ietf.org_doc_html_draft-2Dtrammell-2Dippm-
> 2Dspin&d=3DDwICAg&c=3DLFYZ-
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
YX0Kx
> f6yGQ7ys3kZW_8&s=3DFf6c3_nubeFyUnjZBR6VA8cjG_NEqiOOr_cpbKW30vU&e=3D
> >
> >
> > Abstract:
> >   This document defines an explicit per-flow transport-layer signal for
> >   hybrid measurement of end-to-end RTT.  This signal consists of three
> >   bits: a spin bit, which oscillates once per end-to-end RTT, and a
> >   two-bit Valid Edge Counter (VEC), which compensates for loss and
> >   reordering of the spin bit to increase fidelity of the signal in less
> >   than ideal network conditions.  It describes the algorithm for
> >   generating the signal, approaches for observing it to passively
> >   measure end-to-end latency, and proposes methods for adding it to a
> >   variety of IETF transport protocols.
> >
> >
> >
> >
> > Please note that it may take a couple of minutes from the time of
> submission
> > until the htmlized version and diff are available at tools.ietf.org.
> >
> > The IETF Secretariat
> >
>=20
> _______________________________________________
> ippm mailing list
> ippm@ietf.org
> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__www.ietf.org_mailman_listinfo_ippm&d=3DDwICAg&c=3DLFYZ-
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> f6yGQ7ys3kZW_8&s=3DSuHAnbL6jmsW9x_1RX1jLJJPjy5J4IULAD8M3KuEK-M&e=3D


From nobody Wed Jan  9 06:06:37 2019
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From: "Scharf, Michael" <Michael.Scharf@hs-esslingen.de>
To: "MORTON, ALFRED C (AL)" <acm@research.att.com>, "Brian Trammell (IETF)" <ietf@trammell.ch>, IETF IPPM WG <ippm@ietf.org>
CC: "tcpm@ietf.org" <tcpm@ietf.org>
Thread-Topic: [ippm] Fwd: New Version Notification for draft-trammell-ippm-spin-00.txt
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Subject: Re: [ippm] Fwd: New Version Notification for draft-trammell-ippm-spin-00.txt
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Any TCP-related text on spin bits in IPPM would in my option need to be agn=
ostic to ...

(1) whether the signal would be specified for TCP (e.g., as experiment)

(2) whether the signal would be standardized for TCP (e.g., as proposed sta=
ndard)

(3) how the signal would be encoded in TCP (e.g., new as option or by other=
 some other means)

If adding the signal to TCP was doable by a minor TCP extension, in my pers=
onal point of view the TCP specification would be owned by TCPM. If this to=
pic was not considered a minor extension of TCP, process questions may have=
 to be addressed, e.g., whether a disruptive TCP extension would require a =
BoF or research in IRTF.

The easiest solution for IPPM would be to keep all documents entirely indep=
endent of the answers to (1), (2), and (3).=20

I have add the TCPM list in CC to ensure that the TCPM community is in the =
loop.

Michael
(with no hat)


> -----Original Message-----
> From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of MORTON, ALFRED C
> (AL)
> Sent: Wednesday, January 9, 2019 2:23 PM
> To: Brian Trammell (IETF); IETF IPPM WG
> Subject: Re: [ippm] Fwd: New Version Notification for draft-trammell-
> ippm-spin-00.txt
>=20
> Hi Hatless Brian,
>=20
> I think it is worthwhile to pursue Tx-independent
> Spin-bit-like-signal metrics and measurements.
>=20
> As input to the process, Emile Stephan and I examined
> how the current TCP-passive measurement material in
> the Registry Initial Contents draft would need to be
> modified for Spin-bit, and we captured the results of
> our discussion in the Slides for the IPPM Registry drafts
> presented at the London IETF last year (101).
>=20
> When there's a spare minute, we can take a look and
> see what aspects are covered/not-covered in your
> current draft.
>=20
> regards from Paris-Saclay,
> Al
>=20
> > -----Original Message-----
> > From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of Brian Trammell
> > (IETF)
> > Sent: Wednesday, January 9, 2019 6:37 AM
> > To: IETF IPPM WG <ippm@ietf.org>
> > Subject: [ippm] Fwd: New Version Notification for draft-trammell-
> ippm-
> > spin-00.txt
> >
> > Greetings, and happy new year IPPM!
> >
> > As an individual, no hats:
> >
> > Following up on some of the discussion we've had on the spin bit as a
> > signal (as opposed to as a protocol feature of QUIC) on the IPPM
> list,
> > I've submitted a draft describing the Spin Bit and the supplemental
> Valid
> > Edge Counter signal in a transport-independent way, showing how it
> has
> > been added to QUIC and a (possibly controversial, but definitely
> > implementable and deployable) way to add it to TCP.
> >
> > I'd like to ask the WG's opinion on whether it would like to pursue
> work
> > on the measurement of spin signals (including, e.g., heuristics for
> > recovering RTT samples from spin observations on networks with lots
> of
> > reordering, as a replacement for VEC) within IPPM.
> >
> > Thanks, cheers,
> >
> > Brian, hatless
> >
> >
> > > Begin forwarded message:
> > >
> > > From: internet-drafts@ietf.org
> > > Subject: New Version Notification for draft-trammell-ippm-spin-
> 00.txt
> > > Date: 9 January 2019 at 12:08:32 CET
> > > To: "Brian Trammell" <ietf@trammell.ch>
> > >
> > >
> > > A new version of I-D, draft-trammell-ippm-spin-00.txt
> > > has been successfully submitted by Brian Trammell and posted to the
> > > IETF repository.
> > >
> > > Name:		draft-trammell-ippm-spin
> > > Revision:	00
> > > Title:		An Explicit Transport-Layer Signal for Hybrid RTT
> > Measurement
> > > Document date:	2019-01-09
> > > Group:		Individual Submission
> > > Pages:		14
> > > URL:            https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> > 3A__www.ietf.org_internet-2Ddrafts_draft-2Dtrammell-2Dippm-2Dspin-
> > 2D00.txt&d=3DDwICAg&c=3DLFYZ-
> >
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
YX
> 0Kx
> > f6yGQ7ys3kZW_8&s=3Dvu0ggCIjBhWcxUtFvirJCdM9mcOYa_WTjgEsPu9JS8k&e=3D
> > > Status:         https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> > 3A__datatracker.ietf.org_doc_draft-2Dtrammell-2Dippm-
> > 2Dspin_&d=3DDwICAg&c=3DLFYZ-
> >
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
YX
> 0Kx
> > f6yGQ7ys3kZW_8&s=3Dy8wIYvnk0uYIPzv6kt_uaNu7iWFgo6lyM0ni2oKC8mI&e=3D
> > > Htmlized:       https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> > 3A__tools.ietf.org_html_draft-2Dtrammell-2Dippm-2Dspin-
> > 2D00&d=3DDwICAg&c=3DLFYZ-
> >
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
YX
> 0Kx
> > f6yGQ7ys3kZW_8&s=3DkBIhxR27tuQYuTF2x3gJ4xllcRRL5bE9n4VszgAa4r8&e=3D
> > > Htmlized:       https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> > 3A__datatracker.ietf.org_doc_html_draft-2Dtrammell-2Dippm-
> > 2Dspin&d=3DDwICAg&c=3DLFYZ-
> >
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
YX
> 0Kx
> > f6yGQ7ys3kZW_8&s=3DFf6c3_nubeFyUnjZBR6VA8cjG_NEqiOOr_cpbKW30vU&e=3D
> > >
> > >
> > > Abstract:
> > >   This document defines an explicit per-flow transport-layer signal
> for
> > >   hybrid measurement of end-to-end RTT.  This signal consists of
> three
> > >   bits: a spin bit, which oscillates once per end-to-end RTT, and a
> > >   two-bit Valid Edge Counter (VEC), which compensates for loss and
> > >   reordering of the spin bit to increase fidelity of the signal in
> less
> > >   than ideal network conditions.  It describes the algorithm for
> > >   generating the signal, approaches for observing it to passively
> > >   measure end-to-end latency, and proposes methods for adding it to
> a
> > >   variety of IETF transport protocols.
> > >
> > >
> > >
> > >
> > > Please note that it may take a couple of minutes from the time of
> > submission
> > > until the htmlized version and diff are available at
> tools.ietf.org.
> > >
> > > The IETF Secretariat
> > >
> >
> > _______________________________________________
> > ippm mailing list
> > ippm@ietf.org
> > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> > 3A__www.ietf.org_mailman_listinfo_ippm&d=3DDwICAg&c=3DLFYZ-
> >
> o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDn=
YX
> 0Kx
> > f6yGQ7ys3kZW_8&s=3DSuHAnbL6jmsW9x_1RX1jLJJPjy5J4IULAD8M3KuEK-M&e=3D
>=20
> _______________________________________________
> ippm mailing list
> ippm@ietf.org
> https://www.ietf.org/mailman/listinfo/ippm


From nobody Wed Jan  9 08:02:44 2019
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From: "Brian Trammell (IETF)" <ietf@trammell.ch>
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Date: Wed, 9 Jan 2019 17:02:28 +0100
Cc: "MORTON, ALFRED C (AL)" <acm@research.att.com>, IETF IPPM WG <ippm@ietf.org>, "tcpm@ietf.org" <tcpm@ietf.org>
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Subject: Re: [ippm] Fwd: New Version Notification for draft-trammell-ippm-spin-00.txt
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hi Michael,

Agree completely (indeed, look at the IANA considerations for the =
present revision of the document) -- the reasons we wrote this up for =
TCP is (1) we implemented it in the context of the IMC paper and it =
seems to work pretty well, (2) it points to a way to maintain passive =
RTT measurability for TCP in the event that timestamp deployment is =
reduced for efficiency/privacy reasons (see the associated thread last =
year, on tcpm, iirc), and (3) it might be nice if measurement boxes =
deployed to generate RTT samples from QUIC traffic could use the same =
methodology for TCP traffic.

I'd like to see if there's any traction for the idea of doing this in =
TCP for real before proposing the change in TCPM, though, hence this =
document going to IPPM.

Indeed, I think the final state of this document (should IPPM decide to =
pursue it) would be focused only on abstract mechanisms and the =
measurement techniques they enable, leaving the definition of how to =
generate the signal for each transport to draft-ietf-quic-transport =
(where the spin bit language will eventually be merged) for QUIC and a =
TCPM draft for TCP.

Cheers,

Brian, hatless

> On 9 Jan 2019, at 15:06, Scharf, Michael =
<Michael.Scharf@hs-esslingen.de> wrote:
>=20
> Any TCP-related text on spin bits in IPPM would in my option need to =
be agnostic to ...
>=20
> (1) whether the signal would be specified for TCP (e.g., as =
experiment)
>=20
> (2) whether the signal would be standardized for TCP (e.g., as =
proposed standard)
>=20
> (3) how the signal would be encoded in TCP (e.g., new as option or by =
other some other means)
>=20
> If adding the signal to TCP was doable by a minor TCP extension, in my =
personal point of view the TCP specification would be owned by TCPM. If =
this topic was not considered a minor extension of TCP, process =
questions may have to be addressed, e.g., whether a disruptive TCP =
extension would require a BoF or research in IRTF.
>=20
> The easiest solution for IPPM would be to keep all documents entirely =
independent of the answers to (1), (2), and (3).=20
>=20
> I have add the TCPM list in CC to ensure that the TCPM community is in =
the loop.
>=20
> Michael
> (with no hat)
>=20
>=20
>> -----Original Message-----
>> From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of MORTON, ALFRED =
C
>> (AL)
>> Sent: Wednesday, January 9, 2019 2:23 PM
>> To: Brian Trammell (IETF); IETF IPPM WG
>> Subject: Re: [ippm] Fwd: New Version Notification for draft-trammell-
>> ippm-spin-00.txt
>>=20
>> Hi Hatless Brian,
>>=20
>> I think it is worthwhile to pursue Tx-independent
>> Spin-bit-like-signal metrics and measurements.
>>=20
>> As input to the process, Emile Stephan and I examined
>> how the current TCP-passive measurement material in
>> the Registry Initial Contents draft would need to be
>> modified for Spin-bit, and we captured the results of
>> our discussion in the Slides for the IPPM Registry drafts
>> presented at the London IETF last year (101).
>>=20
>> When there's a spare minute, we can take a look and
>> see what aspects are covered/not-covered in your
>> current draft.
>>=20
>> regards from Paris-Saclay,
>> Al
>>=20
>>> -----Original Message-----
>>> From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of Brian =
Trammell
>>> (IETF)
>>> Sent: Wednesday, January 9, 2019 6:37 AM
>>> To: IETF IPPM WG <ippm@ietf.org>
>>> Subject: [ippm] Fwd: New Version Notification for draft-trammell-
>> ippm-
>>> spin-00.txt
>>>=20
>>> Greetings, and happy new year IPPM!
>>>=20
>>> As an individual, no hats:
>>>=20
>>> Following up on some of the discussion we've had on the spin bit as =
a
>>> signal (as opposed to as a protocol feature of QUIC) on the IPPM
>> list,
>>> I've submitted a draft describing the Spin Bit and the supplemental
>> Valid
>>> Edge Counter signal in a transport-independent way, showing how it
>> has
>>> been added to QUIC and a (possibly controversial, but definitely
>>> implementable and deployable) way to add it to TCP.
>>>=20
>>> I'd like to ask the WG's opinion on whether it would like to pursue
>> work
>>> on the measurement of spin signals (including, e.g., heuristics for
>>> recovering RTT samples from spin observations on networks with lots
>> of
>>> reordering, as a replacement for VEC) within IPPM.
>>>=20
>>> Thanks, cheers,
>>>=20
>>> Brian, hatless
>>>=20
>>>=20
>>>> Begin forwarded message:
>>>>=20
>>>> From: internet-drafts@ietf.org
>>>> Subject: New Version Notification for draft-trammell-ippm-spin-
>> 00.txt
>>>> Date: 9 January 2019 at 12:08:32 CET
>>>> To: "Brian Trammell" <ietf@trammell.ch>
>>>>=20
>>>>=20
>>>> A new version of I-D, draft-trammell-ippm-spin-00.txt
>>>> has been successfully submitted by Brian Trammell and posted to the
>>>> IETF repository.
>>>>=20
>>>> Name:		draft-trammell-ippm-spin
>>>> Revision:	00
>>>> Title:		An Explicit Transport-Layer Signal for Hybrid =
RTT
>>> Measurement
>>>> Document date:	2019-01-09
>>>> Group:		Individual Submission
>>>> Pages:		14
>>>> URL:            https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>>> 3A__www.ietf.org_internet-2Ddrafts_draft-2Dtrammell-2Dippm-2Dspin-
>>> 2D00.txt&d=3DDwICAg&c=3DLFYZ-
>>>=20
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDnY=
X
>> 0Kx
>>> f6yGQ7ys3kZW_8&s=3Dvu0ggCIjBhWcxUtFvirJCdM9mcOYa_WTjgEsPu9JS8k&e=3D
>>>> Status:         https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>>> 3A__datatracker.ietf.org_doc_draft-2Dtrammell-2Dippm-
>>> 2Dspin_&d=3DDwICAg&c=3DLFYZ-
>>>=20
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDnY=
X
>> 0Kx
>>> f6yGQ7ys3kZW_8&s=3Dy8wIYvnk0uYIPzv6kt_uaNu7iWFgo6lyM0ni2oKC8mI&e=3D
>>>> Htmlized:       https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>>> 3A__tools.ietf.org_html_draft-2Dtrammell-2Dippm-2Dspin-
>>> 2D00&d=3DDwICAg&c=3DLFYZ-
>>>=20
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDnY=
X
>> 0Kx
>>> f6yGQ7ys3kZW_8&s=3DkBIhxR27tuQYuTF2x3gJ4xllcRRL5bE9n4VszgAa4r8&e=3D
>>>> Htmlized:       https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>>> 3A__datatracker.ietf.org_doc_html_draft-2Dtrammell-2Dippm-
>>> 2Dspin&d=3DDwICAg&c=3DLFYZ-
>>>=20
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDnY=
X
>> 0Kx
>>> f6yGQ7ys3kZW_8&s=3DFf6c3_nubeFyUnjZBR6VA8cjG_NEqiOOr_cpbKW30vU&e=3D
>>>>=20
>>>>=20
>>>> Abstract:
>>>>  This document defines an explicit per-flow transport-layer signal
>> for
>>>>  hybrid measurement of end-to-end RTT.  This signal consists of
>> three
>>>>  bits: a spin bit, which oscillates once per end-to-end RTT, and a
>>>>  two-bit Valid Edge Counter (VEC), which compensates for loss and
>>>>  reordering of the spin bit to increase fidelity of the signal in
>> less
>>>>  than ideal network conditions.  It describes the algorithm for
>>>>  generating the signal, approaches for observing it to passively
>>>>  measure end-to-end latency, and proposes methods for adding it to
>> a
>>>>  variety of IETF transport protocols.
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>> Please note that it may take a couple of minutes from the time of
>>> submission
>>>> until the htmlized version and diff are available at
>> tools.ietf.org.
>>>>=20
>>>> The IETF Secretariat
>>>>=20
>>>=20
>>> _______________________________________________
>>> ippm mailing list
>>> ippm@ietf.org
>>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>>> 3A__www.ietf.org_mailman_listinfo_ippm&d=3DDwICAg&c=3DLFYZ-
>>>=20
>> =
o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3DthpFnhu2Ui2AT6VgzJFpmdDnY=
X
>> 0Kx
>>> f6yGQ7ys3kZW_8&s=3DSuHAnbL6jmsW9x_1RX1jLJJPjy5J4IULAD8M3KuEK-M&e=3D
>>=20
>> _______________________________________________
>> ippm mailing list
>> ippm@ietf.org
>> https://www.ietf.org/mailman/listinfo/ippm


From nobody Thu Jan 10 08:59:46 2019
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Subject: [ippm] WG Last Call: draft-ietf-ippm-initial-registry & draft-ietf-ippm-metric-registry
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Hello IPPM,

This email starts our working group last call for the IPPM performance metrics registry, and the corresponding initial set of registry entries. The authors have indicated that they believe the documents are sufficiently mature and complete to go ahead. You can find the details on the documents here:

https://datatracker.ietf.org/doc/draft-ietf-ippm-metric-registry/
https://datatracker.ietf.org/doc/draft-ietf-ippm-initial-registry/

Since these are quite large documents, we'll be doing an extended adoption call, for several weeks, to give everyone a chance to thoroughly read the documents. Please provide your feedback by Friday, February 8, 2019.

Please send your review comments to ippm@ietf.org, indicating whether you believe the draft is ready to send up to the IESG and if not, why not.

Best,
Tommy (as IPPM co-chair)

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hello=
 IPPM,<div class=3D""><br class=3D""></div><div class=3D"">This email =
starts our working group last call for the IPPM performance metrics =
registry, and the corresponding initial set of registry entries. The =
authors have indicated that they believe the documents are sufficiently =
mature and complete to go ahead. You can find the details on the =
documents here:<br class=3D""><div class=3D""><br class=3D""></div><div =
class=3D""><a =
href=3D"https://datatracker.ietf.org/doc/draft-ietf-ippm-metric-registry/"=
 =
class=3D"">https://datatracker.ietf.org/doc/draft-ietf-ippm-metric-registr=
y/</a></div><div class=3D""><a =
href=3D"https://datatracker.ietf.org/doc/draft-ietf-ippm-initial-registry/=
" =
class=3D"">https://datatracker.ietf.org/doc/draft-ietf-ippm-initial-regist=
ry/</a></div><div class=3D""><br class=3D""></div><div class=3D"">Since =
these are quite large documents, we'll be doing an extended adoption =
call, for several weeks, to give everyone a chance to thoroughly read =
the documents. Please provide your feedback by <b class=3D"">Friday, =
February 8, 2019</b>.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Please send your review comments to&nbsp;<a =
href=3D"mailto:ippm@ietf.org" class=3D"">ippm@ietf.org</a>, indicating =
whether you believe the draft is ready to send up to the IESG and if =
not, why not.<br class=3D""><div class=3D""><br class=3D""></div><div =
class=3D"">Best,</div><div class=3D"">Tommy (as IPPM =
co-chair)</div></div></div></body></html>=

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From: Wenfei Wu <wenfeiwu@outlook.com>
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Thread-Topic: [Call for Nomination]: SOSR Software Systems Award (2019)
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Subject: [ippm] [Call for Nomination]: SOSR Software Systems Award (2019)
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The ACM SIGCOMM SOSR Software Systems Award is given to an individual or an=
 institution to recognize the development of a software system that has had=
 a significant impact on SDN research, implementations, and tools. The impa=
ct may be reflected in the widespread adoption of the system, or of its und=
erlying concepts, by the wider SDN community, either in research projects, =
in the open-source community, or commercially. The award includes a prize a=
nd an invited talk. Self-nominations are accepted, please see the link belo=
w for nomination details.

Nomination Deadline: January 12th, 2019 (could be extended soon)
Additional details: https://conferences.sigcomm.org/sosr/2019/award.html

Regards,
Wenfei Wu
Assistant Professor at Tsinghua University

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<div class=3D"WordSection1">
<p class=3D"MsoNormal">The ACM SIGCOMM SOSR Software Systems Award is given=
 to an individual or an institution to recognize the development of a softw=
are system that has had a significant impact on SDN research, implementatio=
ns, and tools. The impact may be reflected
 in the widespread adoption of the system, or of its underlying concepts, b=
y the wider SDN community, either in research projects, in the open-source =
community, or commercially. The award includes a prize and an invited talk.=
 Self-nominations are accepted,
 please see the link below for nomination details.</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Nomination Deadline: January 12th, 2019 (could be ex=
tended soon)</p>
<p class=3D"MsoNormal">Additional details: https://conferences.sigcomm.org/=
sosr/2019/award.html</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards,</p>
<p class=3D"MsoNormal">Wenfei Wu</p>
<p class=3D"MsoNormal">Assistant Professor at Tsinghua University&nbsp; </p=
>
</div>
</body>
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From nobody Mon Jan 14 16:35:55 2019
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Thread-Topic: [SOSR 2019]: Call For Poster/demos
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Subject: [ippm] [SOSR 2019]: Call For Poster/demos
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The ACM Symposium on SDN Research (SOSR) demos and posters session showcase=
s research-focused work currently underway in academia and research organiz=
ations. Topics of interest are the same as research topics in the SOSR call=
 for papers. We particularly invite the submission of emerging results in S=
DN research that address timely problems, that can help evolve the landscap=
e of SDN (e.g., addressing new applications), that enhance our understandin=
g of how SDN work in real-world deployments or realistic test beds, or that=
 could influence further applied research and experimentation in industry. =
The SOSR 2019 Demos and Posters committee will review all proposals.

Submission Deadline:  Monday February 11, 2019 (23:59 PST)
Acceptance Notification:  Friday February 22, 2019
Camera-ready Deadline:  Friday March 1, 2019
Website and Submission: https://conferences.sigcomm.org/sosr/2019/calls.htm=
l#cfdemos

Regards,
SOSR'19 Organizing Committee

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The ACM Symposium on SDN Research (SOSR) demos and p=
osters session showcases research-focused work currently underway in academ=
ia and research organizations. Topics of interest are the same as research =
topics in the SOSR call for papers.
 We particularly invite the submission of emerging results in SDN research =
that address timely problems, that can help evolve the landscape of SDN (e.=
g., addressing new applications), that enhance our understanding of how SDN=
 work in real-world deployments
 or realistic test beds, or that could influence further applied research a=
nd experimentation in industry. The SOSR 2019 Demos and Posters committee w=
ill review all proposals.</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Submission Deadline:&nbsp; Monday February 11, 2019 =
(23:59 PST)</p>
<p class=3D"MsoNormal">Acceptance Notification:&nbsp; Friday February 22, 2=
019</p>
<p class=3D"MsoNormal">Camera-ready Deadline:&nbsp; Friday March 1, 2019</p=
>
<p class=3D"MsoNormal">Website and Submission: https://conferences.sigcomm.=
org/sosr/2019/calls.html#cfdemos</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards,</p>
<p class=3D"MsoNormal">SOSR'19 Organizing Committee<o:p></o:p></p>
</div>
</body>
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Subject: [ippm] CFP (IFIP WWIC 2019): The 17th International Conference on Wired/Wireless Internet Communications, Bologna, Italy. June 17-19, 2019
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[Apologies if you got multiple copies of this invitation]

--------------------------------------------------------------
CALL FOR PAPERS

IFIP WWIC 2019
The 17th International Conference on Wired/Wireless Internet Communicat=
ions
http://wwic2019.nws.cs.unibo.it
June 17-19, 2019, Bologna, Italy
--------------------------------------------------------------

-----------------------------------------------------------------------=
-----------------------------------------------------------------------=
------------------
***** PAPER REGISTRATION DEADLINE: February 18, 2019 *****
-----------------------------------------------------------------------=
-----------------------------------------------------------------------=
------------------

Extended versions of selected papers will be invited for publication on=
 a fast track special issue of Computer Communications (Elsevier) journ=
al.=20

-----------------------------------------------------------------------=
-----------------------------------------------------------------------=
------------------

Due to advancements in technology and development of new services, we f=
oresee a tremendous growth of new devices and smart things that need to=
 be connected to the Internet through a variety of wireless technologie=
s. At the same time, the edge of the Internet is increasingly empowered=
 with new capabilities, like pervasive sensing and computing power, whi=
ch opens the way to new domains, services and business models beyond th=
e traditional mobile Internet, such as connected cars, participatory an=
d urban sensing, industrial IoT. As a consequence, new types of informa=
tion have to be delivered by the network with varying requirements in t=
erms of reliability, transmission rates and latency. To cope with the e=
xponential growth of devices and mobile data traffic, there is a need f=
or clean-slate or evolutionary Internet architectures merging and assem=
bling different network technologies, supporting new paradigms for wire=
d/wireless system planning and optimization, efficient transport over h=
eterogeneous wireless access options, efficient and quality-aware conte=
nt distribution, and new approaches for unified operations and manageme=
nt of the heterogeneous components, like software-defined systems and n=
etwork function virtualization. These are only some examples of the cha=
llenges that are of interest to IFIP WWIC 2019.=20
The IFIP WWIC 2019 conference takes a broader view to the merge of wire=
d and wireless technologies and welcomes submissions from academia and =
industry that explore challenges and advances in architectures, algorit=
hms, protocols, and technologies for a global wired/wireless Internet n=
etwork. Papers that present original work, validated by experimentation=
, simulation, or analysis, are solicited. We also encourage work-in-pro=
gress and position papers that describe highly original ideas, present =
new directions, or have the potential to generate insightful provocativ=
e discussions. IFIP WWIC is a single-track conference which has reached=
, over the last 15 years, a high-quality level, which is reflected by t=
he paper acceptance rate as well as the level of attendance. Following =
the conference tradition, there will be the best paper award.=20

Topics of interest include, but are not limited to, the following:

- Anticipatory Mobile Networking=20
- Architectures and protocols for unified operations and management in =
wired/wireless environments=20
- Architectures and protocols for mobile edge/fog computing=20
- Content-centric and user-centric networking in wired/wireless environ=
ments
- Cross-layer network design and optimization
- Data-driven network design and optimization
- Delay/disruptive tolerant and opportunistic networking
- Emergency communication and public-safety networks
- End-to-end QoS support
- Game-theory applications in distributed networked systems
- Heterogeneous wireless access networks
- Internet/Web of Things and Machine-to-Machine (M2M) communications
- Interactions between wireless and optical networks
- Intent-based wired and wireless networking
- Localisation, tracking, and mobility management=20
- Machine-learning approaches in cognitive radio networks
- Machine-learning approaches for network planning, optimization and ma=
nagement
- Modelling of heterogeneity aspects
- Mobile clouds and mobile edge computing (MEC)
- Mobile service level agreements/specifications
- Network mobility and handover management
- Network Function Virtualization (NFV)
- Network security, trust and privacy in a wired/wireless environment=
=20
- Pricing, charging, and accounting
- QoS/QoE mechanisms in wired/wireless environments
- Resource management and admission control
- Robot and UAV networks=20
- Routing in wired/wireless environments
- Satellite and space networking=20
- Seamless inter-networking and self-organisation=20
- Service composition and management
- System prototypes, measurements, real-world deployment, and experienc=
es=20
- Software-defined wireless networks
- 5G and beyond 5G networks
- Traffic characterization and modelling
- Transport protocols and congestion control in a wired/wireless enviro=
nment
- User-centric networking
- Virtual and overlay networks
- WiFi hotspot sharing
- Wireless ad hoc, mesh, vehicular and sensor networks
- Wireless network monitoring
- Wearable communications and computing


------------------------------------------------------------------
PAPER SUBMISSION AND PUBLICATION
------------------------------------------------------------------
Prospective authors are invited to submit original papers with unpublis=
hed material and not currently submitted for consideration elsewhere. P=
apers should not exceed 12 LNCS formatted pages, including figures, tab=
les, and references. At least one author of each accepted paper must re=
gister to the conference and present the paper.=20

Papers accepted and presented at IFIP WWIC 2019 will be published as pa=
rt of the Springer LNCS. They will also be submitted to appear in Scopu=
s, ISI Web of Science, DBLP and other leading indexing services. Extend=
ed versions of selected papers will be invited for publication on a fas=
t track special issue of Computer Communications (Elsevier) journal.=20

All submitted papers must conform to the LNCS Formatting Guidelines. Au=
thors are invited to use either the LNCS's Latex template or MS Word Te=
mplate. If you have any questions about paper submissions or the progra=
m, please contact us at=A0http://wwic2019.nws.cs.unibo.it. All submissi=
ons must be made electronically via EDAS using this link: https://edas.=
info/newPaper.php?c=3D25605


------------------------------------------------------------------
IMPORTANT DATES
------------------------------------------------------------------
- Manuscript registration deadline: February 18, 2018
- Manuscript submission deadline: February 24, 2018
- Manuscript acceptance notification: April 20, 2019
- Camera-ready paper submission: May 6, 2019
- Conference dates: June 17-19, 2019


------------------------------------------------------------------
ORGANIZING COMMITTEE
------------------------------------------------------------------
General Chairs
Marco Di Felice, University of Bologna, Italy
Enrico Natalizio, Universit=E9 de Lorraine, France

Program Chairs
Raffaele Bruno, IIT-CNR, Italy
Andreas Kassler, Karlstad University, Sweden

Publication & Web Chair
Angelo Trotta, University of Bologna, Italy

Publicity Chairs
Deval Bhamare, Karlstad University, Sweden
Simone Bolettieri, IIT-CNR, Italy

------------------------------------------------------------------
CONTACT
------------------------------------------------------------------
For further information, please visit the conference website at:
http://wwic2019.nws.cs.unibo.it or contact the conference organizers at=
:
 wwic2019-chairs@edas.info


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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: "ippm@ietf.org" <ippm@ietf.org>
Thread-Topic: CFPs on IPPM-list
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Date: Wed, 16 Jan 2019 17:44:58 +0000
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Subject: [ippm] CFPs on IPPM-list
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Hi IPPM'ers,

We avoided CFPs and other announcements on IPPM-list for=20
a long time. I think these accouchements are at odds with
an IETF policy, but I couldn't find it easily today.=20

If we have an IPPM-discuss list, then that's the right place=20
for announcements, IMO.

respectfully,
Al

> -----Original Message-----
> From: ippm [mailto:ippm-bounces@ietf.org] On Behalf Of
> simone.bolettieri@iit.cnr.it
> Sent: Wednesday, January 16, 2019 12:00 PM
> To: ippm@ietf.org
> Subject: [ippm] CFP (IFIP WWIC 2019): The 17th International Conference o=
n
> Wired/Wireless Internet Communications, Bologna, Italy. June 17-19, 2019
>=20
> [Apologies if you got multiple copies of this invitation]
>=20
> --------------------------------------------------------------
> CALL FOR PAPERS
>=20
> IFIP WWIC 2019
> The 17th International Conference on Wired/Wireless Internet
> Communications


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Subject: [ippm] IPPM Metric Registry Concept of Roles
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This is a multi-part message in MIME format.
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**

*Hello IPPM WG.*

*

At NIC.br we are developing a measurement system based on the LMAP
framework. Metrics (mainly private ones) are defined following the
proposed IPPM metric registry standard. During =C2=A0this effort we
identified some doubts regarding the concept of roles in the metric
registry:


draft-ietf-ippm-metric-registry-17 states at 7.3.6


=E2=80=9C7.3.6. =C2=A0Role


=C2=A0=C2=A0In some method of measurements, there may be several roles de=
fined

=C2=A0=C2=A0e.g. on a one-way packet delay active measurement, there is o=
ne

=C2=A0=C2=A0measurement agent that generates the packets and the other on=
e that

=C2=A0=C2=A0receives the packets. =C2=A0This column contains the name of =
the role for

=C2=A0=C2=A0this particular entry. =C2=A0In the previous example, there s=
hould be two

=C2=A0=C2=A0entries in the registry, one for each role, so that when a

=C2=A0=C2=A0measurement agent is instructed to perform the one way delay =
source

=C2=A0=C2=A0metric know that it is supposed to generate packets. =C2=A0Th=
e values for

=C2=A0=C2=A0this field are defined in the reference method of measurement=
=2E=E2=80=9D


Regarding a) an interest to avoid proliferation of metrics and b)
efficient use of the LMAP Framework (announcement of capabilities,
scheduling of tasks and reporting of results), shouldn't it be enough
and preferred to keep a single metric definition that can be referenced
with one of multiple possible roles? For example, an LMAP measurement
agent could announce the capability to execute a task producing the OWPD
metric, acting either as a client or a server. When scheduling a task
the LMAP controller would reference that OWPD metric and pin the role to
a specific value (ex: client). And when reporting measurement results
that same role would be reported together with the metric URN.


It seems the above use cases are solved with a single metric that allows
multiple roles. Regarding the metric registry, this perspective
interprets the "role" column as a enumeration of all roles applicable to
this metric, instead of indicating a single mandatory role.


Reinforcing this point of view, the draft-ietf-ippm-initial-registry-09
seem to list all possible roles when describing metrics. Items 4.3.6,
6.3.6, 7.3.6, 8.3.6, 9.3.6. But we do not have any concrete reference on
how the final LMAP report would be when reporting data for these metrics.=



Could you please comment on the real motivation behind the current
draft's choice of creating multiple similar metrics with a single role
each? and if this part of the draft is open for discussions and
improvements?


Thanks in advance,

*

--=20
NIC.br | Heitor Ganzeli
Analista de Projetos/Projects Analyst
Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=C3=B5=
es
(Ceptro.br)
+55 11 5509-3537R.: 4077
INOC 22548*HSG
www.nic.br <http://nic.br>



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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: Heitor Ganzeli <heitor@nic.br>, "ippm@ietf.org" <ippm@ietf.org>
Thread-Topic: [ippm] IPPM Metric Registry Concept of Roles
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--_000_4D7F4AD313D3FC43A053B309F97543CF6BFD2DB8njmtexg5researc_--


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Subject: Re: [ippm] IPPM Metric Registry Concept of Roles
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Hi Al,

Thanks for your reply.

Discussing the new text internally, we think it still gives margin for
multiple interpretations mainly because Roles should be informed inside
the "Function" list on the LMAP framework, instead of "parameters" like
other run-time parameters. We don't know if framework specificities can
be mentioned here, but we'd like to suggest the following modifications:

-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-

=C2=A0

7.3.6=C2=A0 Role

**

**

*

In some methods of measurement, there may be several roles defined,e.g.,
for a one-way packet delay active measurement there is onemeasurement
agent that generates the packets and another agent thatreceives the
packets. This column contains the name of the role(s)for this particular
entry. In the one-way delay example above,there should be two entries in
the Role registry column, "Source" and "Destination".

When a measurement agent is instructed to perform the"Source" Role for
one-way delay metric, the agent knows that itis required to generate
packets.When the Role column of a registry entry defines more than one
Role,then the Role SHALL be treated as a Run-time Parameter, and
suppliedfor execution. It should be noted that the LMAP framework
distinguishes

Role from other Run-time Parameters by defining a special parameter "Role=
s"

inside the Function list.

*

-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-


Regards,


On 1/30/19 12:20 PM, MORTON, ALFRED C (AL) wrote:
>
> Hi Heitor,
>
> =C2=A0
>
> Thanks for your e-mail and your careful read of the
>
> Registry draft.=C2=A0 It=E2=80=99s good to hear that you are
>
> developing an LMAP-based system.
>
> =C2=A0
>
> I think you=E2=80=99ve discovered a case where we failed to
>
> keep the Role description and the current thinking
>
> in-sync. I certainly never meant for 2 roles to
>
> result in two separate registry entries, but that=E2=80=99s
>
> what the description says in -17.
>
> =C2=A0
>
> When reading this paragraph, I saw many places where
>
> I think we can clarify the text. I propose the following
>
> revised section which follows our shared understanding.
>
> =C2=A0
>
> thanks again, and regards,
>
> Al
>
> =C2=A0
>
> -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
> =C2=A0
>
> 7.3.6=C2=A0 Role
>
> =C2=A0
>
> In some methods of measurement, there may be several roles defined,
>
> e.g., for a one-way packet delay active measurement there is one
>
> measurement agent that generates the packets and another agent that
>
> receives the packets. This column contains the name of the role(s)
>
> for this particular entry. In the one-way delay example above,
>
> there should be two entries in the Role registry column, one for
>
> each Role. When a measurement agent is instructed to perform the
>
> "Source" Role for one-way delay metric, the agent knows that it
>
> is required to generate packets. The values for this field are
>
> defined in the reference method of measurement (and this frequently
>
> results in abbreviated role names such as "Src").
>
> =C2=A0
>
> When the Role column of a registry entry defines more than one Role,
>
> then the Role SHALL be treated as a Run-time Parameter and supplied
>
> for execution.
>
> =C2=A0
>
> -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
> =C2=A0
>
> *From:*ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of *Heitor Ganzel=
i
> *Sent:* Tuesday, January 29, 2019 12:37 PM
> *To:* ippm@ietf.org
> *Subject:* [ippm] IPPM Metric Registry Concept of Roles
>
> =C2=A0
>
> Hello IPPM WG.
>
> =C2=A0
>
> At NIC.br we are developing a measurement system based on the LMAP
> framework. Metrics (mainly private ones) are defined following the
> proposed IPPM metric registry standard. During =C2=A0this effort we
> identified some doubts regarding the concept of roles in the metric
> registry:
>
> =C2=A0
>
> draft-ietf-ippm-metric-registry-17 states at 7.3.6
>
> =C2=A0
>
> =E2=80=9C7.3.6. =C2=A0Role
>
> =C2=A0
>
> =C2=A0=C2=A0In some method of measurements, there may be several roles =
defined
>
> =C2=A0=C2=A0e.g. on a one-way packet delay active measurement, there is=
 one
>
> =C2=A0=C2=A0measurement agent that generates the packets and the other =
one that
>
> =C2=A0=C2=A0receives the packets. =C2=A0This column contains the name o=
f the role for
>
> =C2=A0=C2=A0this particular entry. =C2=A0In the previous example, there=
 should be two
>
> =C2=A0=C2=A0entries in the registry, one for each role, so that when a
>
> =C2=A0=C2=A0measurement agent is instructed to perform the one way dela=
y source
>
> =C2=A0=C2=A0metric know that it is supposed to generate packets. =C2=A0=
The values for
>
> =C2=A0=C2=A0this field are defined in the reference method of measureme=
nt.=E2=80=9D
>
> =C2=A0
>
> Regarding a) an interest to avoid proliferation of metrics and b)
> efficient use of the LMAP Framework (announcement of capabilities,
> scheduling of tasks and reporting of results), shouldn't it be enough
> and preferred to keep a single metric definition that can be
> referenced with one of multiple possible roles? For example, an LMAP
> measurement agent could announce the capability to execute a task
> producing the OWPD metric, acting either as a client or a server. When
> scheduling a task the LMAP controller would reference that OWPD metric
> and pin the role to a specific value (ex: client). And when reporting
> measurement results that same role would be reported together with the
> metric URN.
>
> =C2=A0
>
> It seems the above use cases are solved with a single metric that
> allows multiple roles. Regarding the metric registry, this perspective
> interprets the "role" column as a enumeration of all roles applicable
> to this metric, instead of indicating a single mandatory role.
>
> =C2=A0
>
> Reinforcing this point of view, the
> draft-ietf-ippm-initial-registry-09 seem to list all possible roles
> when describing metrics. Items 4.3.6, 6.3.6, 7.3.6, 8.3.6, 9.3.6. But
> we do not have any concrete reference on how the final LMAP report
> would be when reporting data for these metrics.
>
> =C2=A0
>
> Could you please comment on the real motivation behind the current
> draft's choice of creating multiple similar metrics with a single role
> each? and if this part of the draft is open for discussions and
> improvements?
>
> =C2=A0
>
> Thanks in advance,
>
> =C2=A0
>
> --=20
> NIC.br | Heitor Ganzeli
> Analista de Projetos/Projects Analyst
> Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=C3=B5=
es
> (Ceptro.br)
> +55 11 5509-3537 R.: 4077
> INOC 22548*HSG
> *www.nic.br*
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__nic.br&d=3DDwMGa=
Q&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D-SdzhkV5T1JPu=
4CVfVSzHFx2EMN32n-y7kdUY0INPbs&s=3DtMrmlKjleks6aqNR_e2hHWBgD41F6PtgBcIUUy=
RXUFM&e=3D>
>
--=20
NIC.br | Heitor Ganzeli
Analista de Projetos/Projects Analyst
Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=C3=B5=
es
(Ceptro.br)
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    <p>Hi Al,</p>
    <p>Thanks for your reply.</p>
    <p> Discussing the new text internally, we think it still gives
      margin for multiple interpretations mainly because Roles should be
      informed inside the "Function" list on the LMAP framework, instead
      of "parameters" like other run-time parameters. We don't know if
      framework specificities can be mentioned here, but we'd like to
      suggest the following modifications:</p>
    <p class="MsoNormal"><span
        style="font-size:11.0pt;font-family:&quot;Courier
        New&quot;,serif;color:black">-=-=-=-=-=-=-=-=-</span></p>
    <p class="MsoNormal"><span
        style="font-size:11.0pt;font-family:&quot;Courier
        New&quot;,serif;color:black"> </span></p>
    <span style="font-size:11.0pt;font-family:&quot;Courier
      New&quot;,serif;color:black">7.3.6  Role</span>
    <p><b style="font-weight:normal;"
        id="docs-internal-guid-86229b87-7fff-6a79-e24e-41545a97132e">
        <p dir="ltr"
          style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"></span></p>
        <p dir="ltr"
          style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">In some methods of measurement, there may be several roles defined,</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">e.g., for a one-way packet delay active measurement there is one</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">measurement agent that generates the packets and another agent that</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">receives the packets. This column contains the name of the role(s)</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">for this particular entry. In the one-way delay example above,</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">there should be two entries in the Role registry column, "Source" and "Destination". 
</span></p>
        <p dir="ltr"
          style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">When a measurement agent is instructed to perform the</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">"Source" Role for one-way delay metric, the agent knows that it</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">is required to generate packets.</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">When the Role column of a registry entry defines more than one Role,</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">then the Role SHALL be treated as a Run-time Parameter, and supplied</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">for execution. It should be noted that the LMAP framework distinguishes 
</span></p>
        <p dir="ltr"
          style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Role from other Run-time Parameters by defining a special parameter "Roles" 
</span></p>
        <p dir="ltr"
          style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">inside the Function list.</span></p>
      </b><br class="Apple-interchange-newline">
    </p>
    <p><span style="font-size:11.0pt;font-family:&quot;Courier
        New&quot;,serif;color:black">-=-=-=-=-=-=-=-=-</span></p>
    <p><span style="font-size:11.0pt;font-family:&quot;Courier
        New&quot;,serif;color:black"><br>
      </span></p>
    <p><span style="font-size:11.0pt;font-family:&quot;Courier
        New&quot;,serif;color:black">Regards,<br>
      </span></p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 1/30/19 12:20 PM, MORTON, ALFRED C
      (AL) wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:4D7F4AD313D3FC43A053B309F97543CF6BFD2DB8@njmtexg5.research.att.com">
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      <div class="WordSection1">
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Hi Heitor,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Thanks for your e-mail and your
            careful read of the<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Registry draft.  It’s good to
            hear that you are
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">developing an LMAP-based
            system.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">I think you’ve discovered a
            case where we failed to<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">keep the Role description and
            the current thinking<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">in-sync. I certainly never
            meant for 2 roles to
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">result in two separate registry
            entries, but that’s<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">what the description says in
            -17.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">When reading this paragraph, I
            saw many places where<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">I think we can clarify the
            text. I propose the following<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">revised section which follows
            our shared understanding.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">thanks again, and regards,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Al<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">-=-=-=-=-=-=-=-=-<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">7.3.6  Role<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">In some methods of measurement,
            there may be several roles defined,
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">e.g., for a one-way packet
            delay active measurement there is one
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">measurement agent that
            generates the packets and another agent that
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">receives the packets. This
            column contains the name of the role(s)
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">for this particular entry. In
            the one-way delay example above,
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">there should be two entries in
            the Role registry column, one for
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">each Role. When a measurement
            agent is instructed to perform the
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">"Source" Role for one-way delay
            metric, the agent knows that it
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">is required to generate
            packets. The values for this field are
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">defined in the reference method
            of measurement (and this frequently
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">results in abbreviated role
            names such as "Src").<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">When the Role column of a
            registry entry defines more than one Role,
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">then the Role SHALL be treated
            as a Run-time Parameter and supplied
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">for execution.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">-=-=-=-=-=-=-=-=-<o:p></o:p></span></p>
        <p class="MsoNormal"><a name="_MailEndCompose"
            moz-do-not-send="true"><span
              style="font-size:11.0pt;font-family:&quot;Courier
              New&quot;,serif;color:black"><o:p> </o:p></span></a></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                  ippm [<a class="moz-txt-link-freetext" href="mailto:ippm-bounces@ietf.org">mailto:ippm-bounces@ietf.org</a>]
                  <b>On Behalf Of </b>Heitor Ganzeli<br>
                  <b>Sent:</b> Tuesday, January 29, 2019 12:37 PM<br>
                  <b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:ippm@ietf.org">ippm@ietf.org</a><br>
                  <b>Subject:</b> [ippm] IPPM Metric Registry Concept of
                  Roles<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Hello
              IPPM WG.</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">At
              NIC.br we are developing a measurement system based on the
              LMAP framework. Metrics (mainly private ones) are defined
              following the proposed IPPM metric registry standard.
              During  this effort we identified some doubts regarding
              the concept of roles in the metric registry:</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">draft-ietf-ippm-metric-registry-17
              states at 7.3.6</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">“7.3.6.
               Role</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  In
              some method of measurements, there may be several roles
              defined</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  e.g.
              on a one-way packet delay active measurement, there is one</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  measurement
              agent that generates the packets and the other one that</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  receives
              the packets.  This column contains the name of the role
              for</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  this
              particular entry.  In the previous example, there should
              be two</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  entries
              in the registry, one for each role, so that when a</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  measurement
              agent is instructed to perform the one way delay source</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  metric
              know that it is supposed to generate packets.  The values
              for</span><o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  this
              field are defined in the reference method of measurement.”</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Regarding
              a) an interest to avoid proliferation of metrics and b)
              efficient use of the LMAP Framework (announcement of
              capabilities, scheduling of tasks and reporting of
              results), shouldn't it be enough and preferred to keep a
              single metric definition that can be referenced with one
              of multiple possible roles? For example, an LMAP
              measurement agent could announce the capability to execute
              a task producing the OWPD metric, acting either as a
              client or a server. When scheduling a task the LMAP
              controller would reference that OWPD metric and pin the
              role to a specific value (ex: client). And when reporting
              measurement results that same role would be reported
              together with the metric URN. </span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">It
              seems the above use cases are solved with a single metric
              that allows multiple roles. Regarding the metric registry,
              this perspective interprets the "role" column as a
              enumeration of all roles applicable to this metric,
              instead of indicating a single mandatory role.</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Reinforcing
              this point of view, the
              draft-ietf-ippm-initial-registry-09 seem to list all
              possible roles when describing metrics. Items 4.3.6,
              6.3.6, 7.3.6, 8.3.6, 9.3.6. But we do not have any
              concrete reference on how the final LMAP report would be
              when reporting data for these metrics.</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Could
              you please comment on the real motivation behind the
              current draft's choice of creating multiple similar
              metrics with a single role each? and if this part of the
              draft is open for discussions and improvements? </span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Thanks
              in advance,</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <div>
            <p class="MsoNormal" style="margin-bottom:12.0pt">-- <br>
              <img id="_x0000_i1025"
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                class="bold1"><span style="font-size:9.0pt">Heitor
                  Ganzeli</span></span>
              <br>
              <span class="italic1"><span style="font-size:9.0pt">Analista
                  de Projetos/Projects Analyst</span></span>
              <br>
              <span
                style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Centro
                de Estudos e Pesquisas em Tecnologias de Redes e
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                +55 <span class="bold1">11 5509-3537</span> R.: <span
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              <span
                style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">INOC
                22548*HSG<br>
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              <br>
              <o:p></o:p></p>
          </div>
        </div>
      </div>
    </blockquote>
    <div class="moz-signature">-- <br>
      <style>
.bold { font-weight: bold; }
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</style><img src="https://nic.br/assinatura/assinatura-nic-lg.png"
        alt="NIC.br | " style="float: left;margin-right: 20px;">
      <span class="bold" style="font-size: 12px;color: #000;line-height:
        15px;">Heitor Ganzeli</span> <br>
      <span class="italic" style="font-size: 12px;color:
        #000;line-height: 15px;">Analista de Projetos/Projects Analyst</span>
      <br>
      <span style="font-size: 12px;color: #000;line-height: 15px;">Centro
        de Estudos e Pesquisas em Tecnologias de Redes e Operações
        (Ceptro.br)<br>
      </span>
      <span style="font-size: 12px;color: #000;line-height: 15px;">+55 </span><span
        class="bold" style="color: #000;text-decoration: none;font-size:
        12px;color: #000;text-decoration: none;line-height: 15px;">11
        5509-3537</span><span style="font-size: 12px;color:
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      <span style="font-size: 12px;color: #000;line-height: 15px;">INOC
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      <a href="http://nic.br" class="bold" style="color:
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Thread-Topic: [ippm] IPPM Metric Registry Concept of Roles
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--_000_4D7F4AD313D3FC43A053B309F97543CF6BFD36B4njmtexg5researc_--


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Date: Thu, 31 Jan 2019 16:39:52 -0200
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Subject: Re: [ippm] IPPM Metric Registry Concept of Roles
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Hi Al,


The term "Function" is actually from rfc8194 - YANG Data Model for LMAP
section 4.1 page 17. https://tools.ietf.org/html/rfc8194#page-17

We didn't know how to concisely reference the object and put only
"Function list".


However, RFC7594 uses=C2=A0 the term "Measurement Method role" which is f=
irst
mentioned in section 3. https://tools.ietf.org/html/rfc7594#section-3


Thanks again for considering our requests,

Regards,


On 1/31/19 11:51 AM, MORTON, ALFRED C (AL) wrote:
>
> Hi Heitor,
>
> =C2=A0
>
> I agree that we can add text referencing the LMAP
>
> Framework RFC 7594, since we introduced that reference
>
> already in the early sections.
>
> =C2=A0
>
> So the last paragraph would read:
>
> =C2=A0
>
> When the Role column of a registry entry defines more than one Role,
>
> then the Role SHALL be treated as a Run-time Parameter and supplied
>
> for execution. It should be noted that the LMAP framework [RFC7594]
>
> distinguishes the Role from other Run-time Parameters by defining a
>
> special parameter "Roles" inside the Function list.
>
> =C2=A0
>
> -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
> I found that the term =E2=80=9Crole=E2=80=9D is used consistently with =
the
>
> definition in the Registry draft throughout, so no need to
>
> provide a Section number in the reference to RFC 7594.
>
> =C2=A0
>
> However, the term =E2=80=9CFunction List=E2=80=9D that you proposed to =
end the
>
> new sentence does not appear in RFC 7594.
>
> =C2=A0
>
> Can you supply the term that RFC 7594 uses, and a section reference,
> please?
>
> =C2=A0
>
> thanks again,
>
> Al
>
> =C2=A0
>
> =C2=A0
>
> *From:*Heitor Ganzeli [mailto:heitor@nic.br]
> *Sent:* Wednesday, January 30, 2019 11:43 AM
> *To:* MORTON, ALFRED C (AL) <acm@research.att.com>; ippm@ietf.org
> *Subject:* Re: [ippm] IPPM Metric Registry Concept of Roles
>
> =C2=A0
>
> Hi Al,
>
> Thanks for your reply.
>
> Discussing the new text internally, we think it still gives margin for
> multiple interpretations mainly because Roles should be informed
> inside the "Function" list on the LMAP framework, instead of
> "parameters" like other run-time parameters. We don't know if
> framework specificities can be mentioned here, but we'd like to
> suggest the following modifications:
>
> -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
> =C2=A0
>
> 7.3.6=C2=A0 Role
>
> In some methods of measurement, there may be several roles defined,
>
> e.g., for a one-way packet delay active measurement there is one
>
> measurement agent that generates the packets and another agent that
>
> receives the packets. This column contains the name of the role(s)
>
> for this particular entry. In the one-way delay example above,
>
> there should be two entries in the Role registry column, "Source" and
> "Destination".
>
> =C2=A0
>
> When a measurement agent is instructed to perform the
>
> "Source" Role for one-way delay metric, the agent knows that it
>
> is required to generate packets.
>
> =C2=A0
>
> When the Role column of a registry entry defines more than one Role,
>
> then the Role SHALL be treated as a Run-time Parameter, and supplied
>
> for execution. It should be noted that the LMAP framework distinguishes=

>
> =C2=A0
>
> Role from other Run-time Parameters by defining a special parameter
> "Roles"
>
> =C2=A0
>
> inside the Function list.
>
> =C2=A0
>
> -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
> =C2=A0
>
> Regards,
>
> =C2=A0
>
> On 1/30/19 12:20 PM, MORTON, ALFRED C (AL) wrote:
>
>     Hi Heitor,
>
>     =C2=A0
>
>     Thanks for your e-mail and your careful read of the
>
>     Registry draft.=C2=A0 It=E2=80=99s good to hear that you are
>
>     developing an LMAP-based system.
>
>     =C2=A0
>
>     I think you=E2=80=99ve discovered a case where we failed to
>
>     keep the Role description and the current thinking
>
>     in-sync. I certainly never meant for 2 roles to
>
>     result in two separate registry entries, but that=E2=80=99s
>
>     what the description says in -17.
>
>     =C2=A0
>
>     When reading this paragraph, I saw many places where
>
>     I think we can clarify the text. I propose the following
>
>     revised section which follows our shared understanding.
>
>     =C2=A0
>
>     thanks again, and regards,
>
>     Al
>
>     =C2=A0
>
>     -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
>     =C2=A0
>
>     7.3.6=C2=A0 Role
>
>     =C2=A0
>
>     In some methods of measurement, there may be several roles defined,=

>
>     e.g., for a one-way packet delay active measurement there is one
>
>     measurement agent that generates the packets and another agent that=

>
>     receives the packets. This column contains the name of the role(s)
>
>     for this particular entry. In the one-way delay example above,
>
>     there should be two entries in the Role registry column, one for
>
>     each Role. When a measurement agent is instructed to perform the
>
>     "Source" Role for one-way delay metric, the agent knows that it
>
>     is required to generate packets. The values for this field are
>
>     defined in the reference method of measurement (and this frequently=

>
>     results in abbreviated role names such as "Src").
>
>     =C2=A0
>
>     When the Role column of a registry entry defines more than one Role=
,
>
>     then the Role SHALL be treated as a Run-time Parameter and supplied=

>
>     for execution.
>
>     =C2=A0
>
>     -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
>     =C2=A0
>
>     *From:*ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of *Heitor
>     Ganzeli
>     *Sent:* Tuesday, January 29, 2019 12:37 PM
>     *To:* ippm@ietf.org <mailto:ippm@ietf.org>
>     *Subject:* [ippm] IPPM Metric Registry Concept of Roles
>
>     =C2=A0
>
>     Hello IPPM WG.
>
>     =C2=A0
>
>     At NIC.br we are developing a measurement system based on the LMAP
>     framework. Metrics (mainly private ones) are defined following the
>     proposed IPPM metric registry standard. During =C2=A0this effort we=

>     identified some doubts regarding the concept of roles in the
>     metric registry:
>
>     =C2=A0
>
>     draft-ietf-ippm-metric-registry-17 states at 7.3.6
>
>     =C2=A0
>
>     =E2=80=9C7.3.6. =C2=A0Role
>
>     =C2=A0
>
>     =C2=A0=C2=A0In some method of measurements, there may be several ro=
les defined
>
>     =C2=A0=C2=A0e.g. on a one-way packet delay active measurement, ther=
e is one
>
>     =C2=A0=C2=A0measurement agent that generates the packets and the ot=
her one that
>
>     =C2=A0=C2=A0receives the packets. =C2=A0This column contains the na=
me of the role for
>
>     =C2=A0=C2=A0this particular entry. =C2=A0In the previous example, t=
here should be two
>
>     =C2=A0=C2=A0entries in the registry, one for each role, so that whe=
n a
>
>     =C2=A0=C2=A0measurement agent is instructed to perform the one way =
delay source
>
>     =C2=A0=C2=A0metric know that it is supposed to generate packets. =C2=
=A0The values for
>
>     =C2=A0=C2=A0this field are defined in the reference method of measu=
rement.=E2=80=9D
>
>     =C2=A0
>
>     Regarding a) an interest to avoid proliferation of metrics and b)
>     efficient use of the LMAP Framework (announcement of capabilities,
>     scheduling of tasks and reporting of results), shouldn't it be
>     enough and preferred to keep a single metric definition that can
>     be referenced with one of multiple possible roles? For example, an
>     LMAP measurement agent could announce the capability to execute a
>     task producing the OWPD metric, acting either as a client or a
>     server. When scheduling a task the LMAP controller would reference
>     that OWPD metric and pin the role to a specific value (ex:
>     client). And when reporting measurement results that same role
>     would be reported together with the metric URN.
>
>     =C2=A0
>
>     It seems the above use cases are solved with a single metric that
>     allows multiple roles. Regarding the metric registry, this
>     perspective interprets the "role" column as a enumeration of all
>     roles applicable to this metric, instead of indicating a single
>     mandatory role.
>
>     =C2=A0
>
>     Reinforcing this point of view, the
>     draft-ietf-ippm-initial-registry-09 seem to list all possible
>     roles when describing metrics. Items 4.3.6, 6.3.6, 7.3.6, 8.3.6,
>     9.3.6. But we do not have any concrete reference on how the final
>     LMAP report would be when reporting data for these metrics.
>
>     =C2=A0
>
>     Could you please comment on the real motivation behind the current
>     draft's choice of creating multiple similar metrics with a single
>     role each? and if this part of the draft is open for discussions
>     and improvements?
>
>     =C2=A0
>
>     Thanks in advance,
>
>     =C2=A0
>
>     --=20
>     NIC.br | Heitor Ganzeli
>     Analista de Projetos/Projects Analyst
>     Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=
=C3=B5es
>     (Ceptro.br)
>     +55 11 5509-3537 R.: 4077
>     INOC 22548*HSG
>     *www.nic.br*
>     <https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__nic.br&d=3DD=
wMGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D-SdzhkV5T=
1JPu4CVfVSzHFx2EMN32n-y7kdUY0INPbs&s=3DtMrmlKjleks6aqNR_e2hHWBgD41F6PtgBc=
IUUyRXUFM&e=3D>
>
>
> --=20
> NIC.br | Heitor Ganzeli
> Analista de Projetos/Projects Analyst
> Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=C3=B5=
es
> (Ceptro.br)
> +55 11 5509-3537 R.: 4077
> INOC 22548*HSG
> www.nic.br
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__nic.br&d=3DDwMDa=
Q&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3D_6cen3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6z=
YMI&m=3DfG1ocUH95zQ-PzyYzaD--CzygSO2jA_RSUpES0wjDpo&s=3DMUCJBAT5t4EXSTjul=
qkhUKD6YwHRvVfOx0yzhS2FGfc&e=3D>
>
--=20
NIC.br | Heitor Ganzeli
Analista de Projetos/Projects Analyst
Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=C3=B5=
es
(Ceptro.br)
+55 11 5509-3537R.: 4077
INOC 22548*HSG
www.nic.br <http://nic.br>



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    <p>Hi Al,</p>
    <p><br>
    </p>
    <p>The term "Function" is actually from rfc8194 - YANG Data Model
      for LMAP section 4.1 page 17.
      <a class="moz-txt-link-freetext" href="https://tools.ietf.org/html/rfc8194#page-17">https://tools.ietf.org/html/rfc8194#page-17</a><br>
    </p>
    <p>We didn't know how to concisely reference the object and put only
      "Function list".</p>
    <p><br>
    </p>
    <p>However, RFC7594 uses  the term "Measurement Method role" which
      is first mentioned in section 3.
      <a class="moz-txt-link-freetext" href="https://tools.ietf.org/html/rfc7594#section-3">https://tools.ietf.org/html/rfc7594#section-3</a></p>
    <p><br>
    </p>
    <p>Thanks again for considering our requests,</p>
    <p>Regards,<br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 1/31/19 11:51 AM, MORTON, ALFRED C
      (AL) wrote:<br>
    </div>
    <blockquote type="cite"
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      <div class="WordSection1">
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Hi Heitor,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">I agree that we can add text
            referencing the LMAP<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Framework RFC 7594, since we
            introduced that reference<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">already in the early sections.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">So the last paragraph would
            read:<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">When the Role column of a
            registry entry defines more than one Role,
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">then the Role SHALL be treated
            as a Run-time Parameter and supplied
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">for execution. It should be
            noted that the LMAP framework [RFC7594]
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">distinguishes the Role from
            other Run-time Parameters by defining a
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">special parameter "Roles"
            inside the Function list.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">-=-=-=-=-=-=-=-=-=-=-=-<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">I found that the term “role” is
            used consistently with the<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">definition in the Registry
            draft throughout, so no need to
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">provide a Section number in the
            reference to RFC 7594.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">However, the term “Function
            List” that you proposed to end the<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">new sentence does not appear in
            RFC 7594.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Can you supply the term that
            RFC 7594 uses, and a section reference, please?<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">thanks again,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Al<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><a name="_MailEndCompose"
            moz-do-not-send="true"><span
              style="font-size:11.0pt;font-family:&quot;Courier
              New&quot;,serif;color:black"><o:p> </o:p></span></a></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                  Heitor Ganzeli [<a class="moz-txt-link-freetext" href="mailto:heitor@nic.br">mailto:heitor@nic.br</a>]
                  <br>
                  <b>Sent:</b> Wednesday, January 30, 2019 11:43 AM<br>
                  <b>To:</b> MORTON, ALFRED C (AL)
                  <a class="moz-txt-link-rfc2396E" href="mailto:acm@research.att.com">&lt;acm@research.att.com&gt;</a>; <a class="moz-txt-link-abbreviated" href="mailto:ippm@ietf.org">ippm@ietf.org</a><br>
                  <b>Subject:</b> Re: [ippm] IPPM Metric Registry
                  Concept of Roles<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p>Hi Al,<o:p></o:p></p>
          <p>Thanks for your reply.<o:p></o:p></p>
          <p>Discussing the new text internally, we think it still gives
            margin for multiple interpretations mainly because Roles
            should be informed inside the "Function" list on the LMAP
            framework, instead of "parameters" like other run-time
            parameters. We don't know if framework specificities can be
            mentioned here, but we'd like to suggest the following
            modifications:<o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
              style="font-size:11.0pt;font-family:&quot;Courier New
              ,serif;color:black&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
              style="font-size:11.0pt;font-family:&quot;Courier New
              ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
          <p class="MsoNormal"><span
              style="font-size:11.0pt;font-family:&quot;Courier New
              ,serif;color:black&quot;,serif">7.3.6  Role</span>
            <o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">In
              some methods of measurement, there may be several roles
              defined,<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">e.g.,
              for a one-way packet delay active measurement there is one<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">measurement
              agent that generates the packets and another agent that<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">receives
              the packets. This column contains the name of the role(s)<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">for
              this particular entry. In the one-way delay example above,<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">there
              should be two entries in the Role registry column,
              "Source" and "Destination".
              <o:p></o:p></span></p>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">When
              a measurement agent is instructed to perform the<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">"Source"
              Role for one-way delay metric, the agent knows that it<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">is
              required to generate packets.<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p> </o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">When
              the Role column of a registry entry defines more than one
              Role,<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">then
              the Role SHALL be treated as a Run-time Parameter, and
              supplied<o:p></o:p></span></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">for
              execution. It should be noted that the LMAP framework
              distinguishes
              <o:p></o:p></span></p>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Role
              from other Run-time Parameters by defining a special
              parameter "Roles"
              <o:p></o:p></span></p>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p style="margin:0in;margin-bottom:.0001pt"><span
              style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">inside
              the Function list.</span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p><span style="font-size:11.0pt;font-family:&quot;Courier New
              ,serif;color:black&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
          <p><o:p> </o:p></p>
          <p><span style="font-size:11.0pt;font-family:&quot;Courier New
              ,serif;color:black&quot;,serif">Regards,</span><o:p></o:p></p>
          <p><o:p> </o:p></p>
          <div>
            <p class="MsoNormal">On 1/30/19 12:20 PM, MORTON, ALFRED C
              (AL) wrote:<o:p></o:p></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Hi Heitor,</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Thanks for your e-mail
                and your careful read of the</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Registry draft.  It’s
                good to hear that you are
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">developing an LMAP-based
                system.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">I think you’ve
                discovered a case where we failed to</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">keep the Role
                description and the current thinking</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">in-sync. I certainly
                never meant for 2 roles to
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">result in two separate
                registry entries, but that’s</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">what the description
                says in -17.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">When reading this
                paragraph, I saw many places where</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">I think we can clarify
                the text. I propose the following</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">revised section which
                follows our shared understanding.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">thanks again, and
                regards,</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Al</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">7.3.6  Role</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">In some methods of
                measurement, there may be several roles defined,
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">e.g., for a one-way
                packet delay active measurement there is one
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">measurement agent that
                generates the packets and another agent that
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">receives the packets.
                This column contains the name of the role(s)
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">for this particular
                entry. In the one-way delay example above,
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">there should be two
                entries in the Role registry column, one for
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">each Role. When a
                measurement agent is instructed to perform the
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">"Source" Role for
                one-way delay metric, the agent knows that it
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">is required to generate
                packets. The values for this field are
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">defined in the reference
                method of measurement (and this frequently
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">results in abbreviated
                role names such as "Src").</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">When the Role column of
                a registry entry defines more than one Role,
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">then the Role SHALL be
                treated as a Run-time Parameter and supplied
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">for execution.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div style="border:none;border-top:solid #E1E1E1
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                      ippm [<a href="mailto:ippm-bounces@ietf.org"
                        moz-do-not-send="true"><span
                          style="font-family:&quot;Helvetica&quot;,sans-serif">mailto:ippm-bounces@ietf.org</span></a>]
                      <b>On Behalf Of </b>Heitor Ganzeli<br>
                      <b>Sent:</b> Tuesday, January 29, 2019 12:37 PM<br>
                      <b>To:</b> <a href="mailto:ippm@ietf.org"
                        moz-do-not-send="true"><span
                          style="font-family:&quot;Helvetica&quot;,sans-serif">ippm@ietf.org</span></a><br>
                      <b>Subject:</b> [ippm] IPPM Metric Registry
                      Concept of Roles</span><o:p></o:p></p>
                </div>
              </div>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Hello
                  IPPM WG.</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">At
                  NIC.br we are developing a measurement system based on
                  the LMAP framework. Metrics (mainly private ones) are
                  defined following the proposed IPPM metric registry
                  standard. During  this effort we identified some
                  doubts regarding the concept of roles in the metric
                  registry:</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">draft-ietf-ippm-metric-registry-17
                  states at 7.3.6</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">“7.3.6.
                   Role</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  In
                  some method of measurements, there may be several
                  roles defined</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  e.g.
                  on a one-way packet delay active measurement, there is
                  one</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  measurement
                  agent that generates the packets and the other one
                  that</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  receives
                  the packets.  This column contains the name of the
                  role for</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  this
                  particular entry.  In the previous example, there
                  should be two</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  entries
                  in the registry, one for each role, so that when a</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  measurement
                  agent is instructed to perform the one way delay
                  source</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  metric
                  know that it is supposed to generate packets.  The
                  values for</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  this
                  field are defined in the reference method of
                  measurement.”</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Regarding
                  a) an interest to avoid proliferation of metrics and
                  b) efficient use of the LMAP Framework (announcement
                  of capabilities, scheduling of tasks and reporting of
                  results), shouldn't it be enough and preferred to keep
                  a single metric definition that can be referenced with
                  one of multiple possible roles? For example, an LMAP
                  measurement agent could announce the capability to
                  execute a task producing the OWPD metric, acting
                  either as a client or a server. When scheduling a task
                  the LMAP controller would reference that OWPD metric
                  and pin the role to a specific value (ex: client). And
                  when reporting measurement results that same role
                  would be reported together with the metric URN. </span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">It
                  seems the above use cases are solved with a single
                  metric that allows multiple roles. Regarding the
                  metric registry, this perspective interprets the
                  "role" column as a enumeration of all roles applicable
                  to this metric, instead of indicating a single
                  mandatory role.</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Reinforcing
                  this point of view, the
                  draft-ietf-ippm-initial-registry-09 seem to list all
                  possible roles when describing metrics. Items 4.3.6,
                  6.3.6, 7.3.6, 8.3.6, 9.3.6. But we do not have any
                  concrete reference on how the final LMAP report would
                  be when reporting data for these metrics.</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Could
                  you please comment on the real motivation behind the
                  current draft's choice of creating multiple similar
                  metrics with a single role each? and if this part of
                  the draft is open for discussions and improvements? </span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Thanks
                  in advance,</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
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          </blockquote>
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                  Ganzeli</span></span>
              <br>
              <span class="italic2"><span style="font-size:9.0pt">Analista
                  de Projetos/Projects Analyst</span></span>
              <br>
              <span
                style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Centro
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      <br>
      <span style="font-size: 12px;color: #000;line-height: 15px;">Centro
        de Estudos e Pesquisas em Tecnologias de Redes e Operações
        (Ceptro.br)<br>
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      <span style="font-size: 12px;color: #000;line-height: 15px;">+55 </span><span
        class="bold" style="color: #000;text-decoration: none;font-size:
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        5509-3537</span><span style="font-size: 12px;color:
        #000;line-height: 15px;"> R.: </span><span class="bold"
        style="font-size: 12px;color: #000;line-height: 15px;">4077
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      <span style="font-size: 12px;color: #000;line-height: 15px;"> </span><span
        class="bold" style="font-size: 12px;color: #000;line-height:
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      <span style="font-size: 12px;color: #000;line-height: 15px;">INOC
        22548*HSG<br>
      </span>
      <a href="http://nic.br" class="bold" style="color:
        #000;text-decoration: none;font-size: 12px;line-height: 15px;">www.nic.br</a><br>
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Thread-Topic: [ippm] IPPM Metric Registry Concept of Roles
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--_000_4D7F4AD313D3FC43A053B309F97543CF6BFD389Dnjmtexg5researc_--


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From: Heitor Ganzeli <heitor@nic.br>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/ReYCzwzXj-nanL9-OToJovt4P90>
Subject: Re: [ippm] IPPM Metric Registry Concept of Roles
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Ok, thanks a lot! I think that closes all our doubts regarding the matter=
=2E


Regards,

On 1/31/19 5:03 PM, MORTON, ALFRED C (AL) wrote:
>
> Great, thanks for the reference to the LMAP YANG model.
>
> =C2=A0
>
> I think we should say:
>
> =C2=A0
>
> It should be noted that the LMAP framework [RFC7594]
>
> distinguishes the Role from other Run-time Parameters by defining a
>
> special parameter "Roles" inside the Registry-grouping Function list
>
> in the LMAP YANG Model [RFC8194].
>
> =C2=A0
>
> Al
>
> =C2=A0
>
> *From:*Heitor Ganzeli [mailto:heitor@nic.br]
> *Sent:* Thursday, January 31, 2019 1:40 PM
> *To:* MORTON, ALFRED C (AL) <acm@research.att.com>; ippm@ietf.org
> *Subject:* Re: [ippm] IPPM Metric Registry Concept of Roles
>
> =C2=A0
>
> Hi Al,
>
> =C2=A0
>
> The term "Function" is actually from rfc8194 - YANG Data Model for
> LMAP section 4.1 page 17. https://tools.ietf.org/html/rfc8194#page-17
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_=
html_rfc8194-23page-2D17&d=3DDwMDaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3D_6cen3=
Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6zYMI&m=3D6p5VASQ5wD7b0yR1P86X7L9DD1DznoT=
cc0ObrTF4sls&s=3Dy8rhttmoB7Dsk9KdYI-OwaDSRJPIO12eNpXC29Lpi8Y&e=3D>
>
> We didn't know how to concisely reference the object and put only
> "Function list".
>
> =C2=A0
>
> However, RFC7594 uses=C2=A0 the term "Measurement Method role" which is=

> first mentioned in section 3.
> https://tools.ietf.org/html/rfc7594#section-3
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_=
html_rfc7594-23section-2D3&d=3DDwMDaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3D_6ce=
n3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6zYMI&m=3D6p5VASQ5wD7b0yR1P86X7L9DD1Dzn=
oTcc0ObrTF4sls&s=3DUoSTqfBW5u5tD9fGN05CbjNoOXiMz6N7c4MTMCBfrWs&e=3D>
>
> =C2=A0
>
> Thanks again for considering our requests,
>
> Regards,
>
> =C2=A0
>
> On 1/31/19 11:51 AM, MORTON, ALFRED C (AL) wrote:
>
>     Hi Heitor,
>
>     =C2=A0
>
>     I agree that we can add text referencing the LMAP
>
>     Framework RFC 7594, since we introduced that reference
>
>     already in the early sections.
>
>     =C2=A0
>
>     So the last paragraph would read:
>
>     =C2=A0
>
>     When the Role column of a registry entry defines more than one Role=
,
>
>     then the Role SHALL be treated as a Run-time Parameter and supplied=

>
>     for execution. It should be noted that the LMAP framework [RFC7594]=

>
>     distinguishes the Role from other Run-time Parameters by defining a=

>
>     special parameter "Roles" inside the Function list.
>
>     =C2=A0
>
>     -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
>     I found that the term =E2=80=9Crole=E2=80=9D is used consistently w=
ith the
>
>     definition in the Registry draft throughout, so no need to
>
>     provide a Section number in the reference to RFC 7594.
>
>     =C2=A0
>
>     However, the term =E2=80=9CFunction List=E2=80=9D that you proposed=
 to end the
>
>     new sentence does not appear in RFC 7594.
>
>     =C2=A0
>
>     Can you supply the term that RFC 7594 uses, and a section
>     reference, please?
>
>     =C2=A0
>
>     thanks again,
>
>     Al
>
>     =C2=A0
>
>     =C2=A0
>
>     *From:*Heitor Ganzeli [mailto:heitor@nic.br]
>     *Sent:* Wednesday, January 30, 2019 11:43 AM
>     *To:* MORTON, ALFRED C (AL) <acm@research.att.com>
>     <mailto:acm@research.att.com>; ippm@ietf.org <mailto:ippm@ietf.org>=

>     *Subject:* Re: [ippm] IPPM Metric Registry Concept of Roles
>
>     =C2=A0
>
>     Hi Al,
>
>     Thanks for your reply.
>
>     Discussing the new text internally, we think it still gives margin
>     for multiple interpretations mainly because Roles should be
>     informed inside the "Function" list on the LMAP framework, instead
>     of "parameters" like other run-time parameters. We don't know if
>     framework specificities can be mentioned here, but we'd like to
>     suggest the following modifications:
>
>     -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
>     =C2=A0
>
>     7.3.6=C2=A0 Role
>
>     In some methods of measurement, there may be several roles defined,=

>
>     e.g., for a one-way packet delay active measurement there is one
>
>     measurement agent that generates the packets and another agent that=

>
>     receives the packets. This column contains the name of the role(s)
>
>     for this particular entry. In the one-way delay example above,
>
>     there should be two entries in the Role registry column, "Source"
>     and "Destination".
>
>     =C2=A0
>
>     When a measurement agent is instructed to perform the
>
>     "Source" Role for one-way delay metric, the agent knows that it
>
>     is required to generate packets.
>
>     =C2=A0
>
>     When the Role column of a registry entry defines more than one Role=
,
>
>     then the Role SHALL be treated as a Run-time Parameter, and supplie=
d
>
>     for execution. It should be noted that the LMAP framework
>     distinguishes
>
>     =C2=A0
>
>     Role from other Run-time Parameters by defining a special
>     parameter "Roles"
>
>     =C2=A0
>
>     inside the Function list.
>
>     =C2=A0
>
>     -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
>     =C2=A0
>
>     Regards,
>
>     =C2=A0
>
>     On 1/30/19 12:20 PM, MORTON, ALFRED C (AL) wrote:
>
>         Hi Heitor,
>
>         =C2=A0
>
>         Thanks for your e-mail and your careful read of the
>
>         Registry draft.=C2=A0 It=E2=80=99s good to hear that you are
>
>         developing an LMAP-based system.
>
>         =C2=A0
>
>         I think you=E2=80=99ve discovered a case where we failed to
>
>         keep the Role description and the current thinking
>
>         in-sync. I certainly never meant for 2 roles to
>
>         result in two separate registry entries, but that=E2=80=99s
>
>         what the description says in -17.
>
>         =C2=A0
>
>         When reading this paragraph, I saw many places where
>
>         I think we can clarify the text. I propose the following
>
>         revised section which follows our shared understanding.
>
>         =C2=A0
>
>         thanks again, and regards,
>
>         Al
>
>         =C2=A0
>
>         -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
>         =C2=A0
>
>         7.3.6=C2=A0 Role
>
>         =C2=A0
>
>         In some methods of measurement, there may be several roles
>         defined,
>
>         e.g., for a one-way packet delay active measurement there is on=
e
>
>         measurement agent that generates the packets and another agent
>         that
>
>         receives the packets. This column contains the name of the
>         role(s)
>
>         for this particular entry. In the one-way delay example above,
>
>         there should be two entries in the Role registry column, one fo=
r
>
>         each Role. When a measurement agent is instructed to perform th=
e
>
>         "Source" Role for one-way delay metric, the agent knows that it=

>
>         is required to generate packets. The values for this field are
>
>         defined in the reference method of measurement (and this
>         frequently
>
>         results in abbreviated role names such as "Src").
>
>         =C2=A0
>
>         When the Role column of a registry entry defines more than one
>         Role,
>
>         then the Role SHALL be treated as a Run-time Parameter and
>         supplied
>
>         for execution.
>
>         =C2=A0
>
>         -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
>
>         =C2=A0
>
>         *From:*ippm [mailto:ippm-bounces@ietf.org] *On Behalf Of
>         *Heitor Ganzeli
>         *Sent:* Tuesday, January 29, 2019 12:37 PM
>         *To:* ippm@ietf.org <mailto:ippm@ietf.org>
>         *Subject:* [ippm] IPPM Metric Registry Concept of Roles
>
>         =C2=A0
>
>         Hello IPPM WG.
>
>         =C2=A0
>
>         At NIC.br we are developing a measurement system based on the
>         LMAP framework. Metrics (mainly private ones) are defined
>         following the proposed IPPM metric registry standard. During
>         =C2=A0this effort we identified some doubts regarding the conce=
pt
>         of roles in the metric registry:
>
>         =C2=A0
>
>         draft-ietf-ippm-metric-registry-17 states at 7.3.6
>
>         =C2=A0
>
>         =E2=80=9C7.3.6. =C2=A0Role
>
>         =C2=A0
>
>         =C2=A0=C2=A0In some method of measurements, there may be severa=
l roles
>         defined
>
>         =C2=A0=C2=A0e.g. on a one-way packet delay active measurement, =
there is one
>
>         =C2=A0=C2=A0measurement agent that generates the packets and th=
e other
>         one that
>
>         =C2=A0=C2=A0receives the packets. =C2=A0This column contains th=
e name of the
>         role for
>
>         =C2=A0=C2=A0this particular entry. =C2=A0In the previous exampl=
e, there
>         should be two
>
>         =C2=A0=C2=A0entries in the registry, one for each role, so that=
 when a
>
>         =C2=A0=C2=A0measurement agent is instructed to perform the one =
way delay
>         source
>
>         =C2=A0=C2=A0metric know that it is supposed to generate packets=
=2E =C2=A0The
>         values for
>
>         =C2=A0=C2=A0this field are defined in the reference method of m=
easurement.=E2=80=9D
>
>         =C2=A0
>
>         Regarding a) an interest to avoid proliferation of metrics and
>         b) efficient use of the LMAP Framework (announcement of
>         capabilities, scheduling of tasks and reporting of results),
>         shouldn't it be enough and preferred to keep a single metric
>         definition that can be referenced with one of multiple
>         possible roles? For example, an LMAP measurement agent could
>         announce the capability to execute a task producing the OWPD
>         metric, acting either as a client or a server. When scheduling
>         a task the LMAP controller would reference that OWPD metric
>         and pin the role to a specific value (ex: client). And when
>         reporting measurement results that same role would be reported
>         together with the metric URN.
>
>         =C2=A0
>
>         It seems the above use cases are solved with a single metric
>         that allows multiple roles. Regarding the metric registry,
>         this perspective interprets the "role" column as a enumeration
>         of all roles applicable to this metric, instead of indicating
>         a single mandatory role.
>
>         =C2=A0
>
>         Reinforcing this point of view, the
>         draft-ietf-ippm-initial-registry-09 seem to list all possible
>         roles when describing metrics. Items 4.3.6, 6.3.6, 7.3.6,
>         8.3.6, 9.3.6. But we do not have any concrete reference on how
>         the final LMAP report would be when reporting data for these
>         metrics.
>
>         =C2=A0
>
>         Could you please comment on the real motivation behind the
>         current draft's choice of creating multiple similar metrics
>         with a single role each? and if this part of the draft is open
>         for discussions and improvements?
>
>         =C2=A0
>
>         Thanks in advance,
>
>         =C2=A0
>
>         --=20
>         NIC.br | Heitor Ganzeli
>         Analista de Projetos/Projects Analyst
>         Centro de Estudos e Pesquisas em Tecnologias de Redes e
>         Opera=C3=A7=C3=B5es (Ceptro.br)
>         +55 11 5509-3537 R.: 4077
>         INOC 22548*HSG
>         *www.nic.br*
>         <https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__nic.br&d=
=3DDwMGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DOfsSu8kTIltVyD1oL72cBw&m=3D-Sdzh=
kV5T1JPu4CVfVSzHFx2EMN32n-y7kdUY0INPbs&s=3DtMrmlKjleks6aqNR_e2hHWBgD41F6P=
tgBcIUUyRXUFM&e=3D>
>
>
>
>     --=20
>     NIC.br | Heitor Ganzeli
>     Analista de Projetos/Projects Analyst
>     Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=
=C3=B5es
>     (Ceptro.br)
>     +55 11 5509-3537 R.: 4077
>     INOC 22548*HSG
>     www.nic.br
>     <https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__nic.br&d=3DD=
wMDaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3D_6cen3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr=
8-6zYMI&m=3DfG1ocUH95zQ-PzyYzaD--CzygSO2jA_RSUpES0wjDpo&s=3DMUCJBAT5t4EXS=
TjulqkhUKD6YwHRvVfOx0yzhS2FGfc&e=3D>
>
>
> --=20
> NIC.br | Heitor Ganzeli
> Analista de Projetos/Projects Analyst
> Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=C3=B5=
es
> (Ceptro.br)
> +55 11 5509-3537 R.: 4077
> INOC 22548*HSG
> www.nic.br
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__nic.br&d=3DDwMDa=
Q&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3D_6cen3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6z=
YMI&m=3D6p5VASQ5wD7b0yR1P86X7L9DD1DznoTcc0ObrTF4sls&s=3DQOPZTCihknPSVf5ZF=
ftCv9_ay06SEk8rjmb3st5mkAk&e=3D>
>
--=20
NIC.br | Heitor Ganzeli
Analista de Projetos/Projects Analyst
Centro de Estudos e Pesquisas em Tecnologias de Redes e Opera=C3=A7=C3=B5=
es
(Ceptro.br)
+55 11 5509-3537R.: 4077
INOC 22548*HSG
www.nic.br <http://nic.br>



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    <p>Ok, thanks a lot! I think that closes all our doubts regarding
      the matter.</p>
    <p><br>
    </p>
    <p>Regards,</p>
    <div class="moz-cite-prefix">On 1/31/19 5:03 PM, MORTON, ALFRED C
      (AL) wrote:<br>
    </div>
    <blockquote type="cite"
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      <div class="WordSection1">
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">Great, thanks for the reference
            to the LMAP YANG model.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black">I think we should say:<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier New
            ,serif;color:black&quot;,serif">It should be noted that the
            LMAP framework [RFC7594]
          </span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier New
            ,serif;color:black&quot;,serif">distinguishes the Role from
            other Run-time Parameters by defining a
          </span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier New
            ,serif;color:black&quot;,serif">special parameter "Roles"
            inside the Registry-grouping Function list
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier New
            ,serif;color:black&quot;,serif">in the LMAP YANG Model
            [RFC8194].</span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><a name="_MailEndCompose"
            moz-do-not-send="true"><span
              style="font-size:11.0pt;font-family:&quot;Courier
              New&quot;,serif;color:black">Al<o:p></o:p></span></a></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Courier
            New&quot;,serif;color:black"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                  Heitor Ganzeli [<a class="moz-txt-link-freetext" href="mailto:heitor@nic.br">mailto:heitor@nic.br</a>]
                  <br>
                  <b>Sent:</b> Thursday, January 31, 2019 1:40 PM<br>
                  <b>To:</b> MORTON, ALFRED C (AL)
                  <a class="moz-txt-link-rfc2396E" href="mailto:acm@research.att.com">&lt;acm@research.att.com&gt;</a>; <a class="moz-txt-link-abbreviated" href="mailto:ippm@ietf.org">ippm@ietf.org</a><br>
                  <b>Subject:</b> Re: [ippm] IPPM Metric Registry
                  Concept of Roles<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p>Hi Al,<o:p></o:p></p>
          <p><o:p> </o:p></p>
          <p>The term "Function" is actually from rfc8194 - YANG Data
            Model for LMAP section 4.1 page 17.
            <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_rfc8194-23page-2D17&amp;d=DwMDaQ&amp;c=LFYZ-o9_HUMeMTSQicvjIg&amp;r=_6cen3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6zYMI&amp;m=6p5VASQ5wD7b0yR1P86X7L9DD1DznoTcc0ObrTF4sls&amp;s=y8rhttmoB7Dsk9KdYI-OwaDSRJPIO12eNpXC29Lpi8Y&amp;e="
              moz-do-not-send="true">
              <span
                style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">https://tools.ietf.org/html/rfc8194#page-17</span></a><o:p></o:p></p>
          <p>We didn't know how to concisely reference the object and
            put only "Function list".<o:p></o:p></p>
          <p><o:p> </o:p></p>
          <p>However, RFC7594 uses  the term "Measurement Method role"
            which is first mentioned in section 3.
            <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_rfc7594-23section-2D3&amp;d=DwMDaQ&amp;c=LFYZ-o9_HUMeMTSQicvjIg&amp;r=_6cen3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6zYMI&amp;m=6p5VASQ5wD7b0yR1P86X7L9DD1DznoTcc0ObrTF4sls&amp;s=UoSTqfBW5u5tD9fGN05CbjNoOXiMz6N7c4MTMCBfrWs&amp;e="
              moz-do-not-send="true">
              <span
                style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">https://tools.ietf.org/html/rfc7594#section-3</span></a><o:p></o:p></p>
          <p><o:p> </o:p></p>
          <p>Thanks again for considering our requests,<o:p></o:p></p>
          <p>Regards,<o:p></o:p></p>
          <p><o:p> </o:p></p>
          <div>
            <p class="MsoNormal">On 1/31/19 11:51 AM, MORTON, ALFRED C
              (AL) wrote:<o:p></o:p></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Hi Heitor,</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">I agree that we can add
                text referencing the LMAP</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Framework RFC 7594,
                since we introduced that reference</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">already in the early
                sections.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">So the last paragraph
                would read:</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">When the Role column of
                a registry entry defines more than one Role,
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">then the Role SHALL be
                treated as a Run-time Parameter and supplied
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">for execution. It should
                be noted that the LMAP framework [RFC7594]
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">distinguishes the Role
                from other Run-time Parameters by defining a
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">special parameter
                "Roles" inside the Function list.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">-=-=-=-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">I found that the term
                “role” is used consistently with the</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">definition in the
                Registry draft throughout, so no need to
              </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">provide a Section number
                in the reference to RFC 7594.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">However, the term
                “Function List” that you proposed to end the</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">new sentence does not
                appear in RFC 7594.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Can you supply the term
                that RFC 7594 uses, and a section reference, please?</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">thanks again,</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif">Al</span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
                style="font-size:11.0pt;font-family:&quot;Courier New
                ,serif;color:black&quot;,serif"> </span><o:p></o:p></p>
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div style="border:none;border-top:solid #E1E1E1
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                      Heitor Ganzeli [<a href="mailto:heitor@nic.br"
                        moz-do-not-send="true"><span
                          style="font-family:&quot;Helvetica&quot;,sans-serif">mailto:heitor@nic.br</span></a>]
                      <br>
                      <b>Sent:</b> Wednesday, January 30, 2019 11:43 AM<br>
                      <b>To:</b> MORTON, ALFRED C (AL) <a
                        href="mailto:acm@research.att.com"
                        moz-do-not-send="true"><span
                          style="font-family:&quot;Helvetica&quot;,sans-serif">&lt;acm@research.att.com&gt;</span></a>;
                      <a href="mailto:ippm@ietf.org"
                        moz-do-not-send="true"><span
                          style="font-family:&quot;Helvetica&quot;,sans-serif">ippm@ietf.org</span></a><br>
                      <b>Subject:</b> Re: [ippm] IPPM Metric Registry
                      Concept of Roles</span><o:p></o:p></p>
                </div>
              </div>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p>Hi Al,<o:p></o:p></p>
              <p>Thanks for your reply.<o:p></o:p></p>
              <p>Discussing the new text internally, we think it still
                gives margin for multiple interpretations mainly because
                Roles should be informed inside the "Function" list on
                the LMAP framework, instead of "parameters" like other
                run-time parameters. We don't know if framework
                specificities can be mentioned here, but we'd like to
                suggest the following modifications:<o:p></o:p></p>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                  style="font-size:11.0pt;font-family:&quot;Courier
                  New&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                  style="font-size:11.0pt;font-family:&quot;Courier
                  New&quot;,serif"> </span><o:p></o:p></p>
              <p class="MsoNormal"><span
                  style="font-size:11.0pt;font-family:&quot;Courier
                  New&quot;,serif">7.3.6  Role</span>
                <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">In
                  some methods of measurement, there may be several
                  roles defined,</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">e.g.,
                  for a one-way packet delay active measurement there is
                  one</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">measurement
                  agent that generates the packets and another agent
                  that</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">receives
                  the packets. This column contains the name of the
                  role(s)</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">for
                  this particular entry. In the one-way delay example
                  above,</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">there
                  should be two entries in the Role registry column,
                  "Source" and "Destination".
                </span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">When
                  a measurement agent is instructed to perform the</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">"Source"
                  Role for one-way delay metric, the agent knows that it</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">is
                  required to generate packets.</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">When
                  the Role column of a registry entry defines more than
                  one Role,</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">then
                  the Role SHALL be treated as a Run-time Parameter, and
                  supplied</span><o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">for
                  execution. It should be noted that the LMAP framework
                  distinguishes
                </span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Role
                  from other Run-time Parameters by defining a special
                  parameter "Roles"
                </span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p style="margin:0in;margin-bottom:.0001pt"><span
                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">inside
                  the Function list.</span><o:p></o:p></p>
              <p class="MsoNormal"> <o:p></o:p></p>
              <p><span style="font-size:11.0pt;font-family:&quot;Courier
                  New&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
              <p> <o:p></o:p></p>
              <p><span style="font-size:11.0pt;font-family:&quot;Courier
                  New&quot;,serif">Regards,</span><o:p></o:p></p>
              <p> <o:p></o:p></p>
              <div>
                <p class="MsoNormal">On 1/30/19 12:20 PM, MORTON, ALFRED
                  C (AL) wrote:<o:p></o:p></p>
              </div>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">Hi Heitor,</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">Thanks for your e-mail and your
                    careful read of the</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">Registry draft.  It’s good to hear
                    that you are
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">developing an LMAP-based system.</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">I think you’ve discovered a case
                    where we failed to</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">keep the Role description and the
                    current thinking</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">in-sync. I certainly never meant
                    for 2 roles to
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">result in two separate registry
                    entries, but that’s</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">what the description says in -17.</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">When reading this paragraph, I saw
                    many places where</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">I think we can clarify the text. I
                    propose the following</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">revised section which follows our
                    shared understanding.</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">thanks again, and regards,</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">Al</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">7.3.6  Role</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">In some methods of measurement,
                    there may be several roles defined,
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">e.g., for a one-way packet delay
                    active measurement there is one
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">measurement agent that generates
                    the packets and another agent that
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">receives the packets. This column
                    contains the name of the role(s)
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">for this particular entry. In the
                    one-way delay example above,
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">there should be two entries in the
                    Role registry column, one for
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">each Role. When a measurement agent
                    is instructed to perform the
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">"Source" Role for one-way delay
                    metric, the agent knows that it
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">is required to generate packets.
                    The values for this field are
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">defined in the reference method of
                    measurement (and this frequently
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">results in abbreviated role names
                    such as "Src").</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">When the Role column of a registry
                    entry defines more than one Role,
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">then the Role SHALL be treated as a
                    Run-time Parameter and supplied
                  </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">for execution.</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif">-=-=-=-=-=-=-=-=-</span><o:p></o:p></p>
                <p class="MsoNormal"><span
                    style="font-size:11.0pt;font-family:&quot;Courier
                    New&quot;,serif"> </span><o:p></o:p></p>
                <div style="border:none;border-left:solid blue
                  1.5pt;padding:0in 0in 0in 4.0pt">
                  <div>
                    <div style="border:none;border-top:solid #E1E1E1
                      1.0pt;padding:3.0pt 0in 0in 0in">
                      <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                          ippm [<a href="mailto:ippm-bounces@ietf.org"
                            moz-do-not-send="true"><span
                              style="font-family:&quot;Helvetica&quot;,sans-serif">mailto:ippm-bounces@ietf.org</span></a>]
                          <b>On Behalf Of </b>Heitor Ganzeli<br>
                          <b>Sent:</b> Tuesday, January 29, 2019 12:37
                          PM<br>
                          <b>To:</b> <a href="mailto:ippm@ietf.org"
                            moz-do-not-send="true"><span
                              style="font-family:&quot;Helvetica&quot;,sans-serif">ippm@ietf.org</span></a><br>
                          <b>Subject:</b> [ippm] IPPM Metric Registry
                          Concept of Roles</span><o:p></o:p></p>
                    </div>
                  </div>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Hello
                      IPPM WG.</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">At
                      NIC.br we are developing a measurement system
                      based on the LMAP framework. Metrics (mainly
                      private ones) are defined following the proposed
                      IPPM metric registry standard. During  this effort
                      we identified some doubts regarding the concept of
                      roles in the metric registry:</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">draft-ietf-ippm-metric-registry-17
                      states at 7.3.6</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">“7.3.6.
                       Role</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  In
                      some method of measurements, there may be several
                      roles defined</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  e.g.
                      on a one-way packet delay active measurement,
                      there is one</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  measurement
                      agent that generates the packets and the other one
                      that</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  receives
                      the packets.  This column contains the name of the
                      role for</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  this
                      particular entry.  In the previous example, there
                      should be two</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  entries
                      in the registry, one for each role, so that when a</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  measurement
                      agent is instructed to perform the one way delay
                      source</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  metric
                      know that it is supposed to generate packets.  The
                      values for</span><o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">  this
                      field are defined in the reference method of
                      measurement.”</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Regarding
                      a) an interest to avoid proliferation of metrics
                      and b) efficient use of the LMAP Framework
                      (announcement of capabilities, scheduling of tasks
                      and reporting of results), shouldn't it be enough
                      and preferred to keep a single metric definition
                      that can be referenced with one of multiple
                      possible roles? For example, an LMAP measurement
                      agent could announce the capability to execute a
                      task producing the OWPD metric, acting either as a
                      client or a server. When scheduling a task the
                      LMAP controller would reference that OWPD metric
                      and pin the role to a specific value (ex: client).
                      And when reporting measurement results that same
                      role would be reported together with the metric
                      URN. </span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">It
                      seems the above use cases are solved with a single
                      metric that allows multiple roles. Regarding the
                      metric registry, this perspective interprets the
                      "role" column as a enumeration of all roles
                      applicable to this metric, instead of indicating a
                      single mandatory role.</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Reinforcing
                      this point of view, the
                      draft-ietf-ippm-initial-registry-09 seem to list
                      all possible roles when describing metrics. Items
                      4.3.6, 6.3.6, 7.3.6, 8.3.6, 9.3.6. But we do not
                      have any concrete reference on how the final LMAP
                      report would be when reporting data for these
                      metrics.</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Could
                      you please comment on the real motivation behind
                      the current draft's choice of creating multiple
                      similar metrics with a single role each? and if
                      this part of the draft is open for discussions and
                      improvements? </span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <p style="margin:0in;margin-bottom:.0001pt"><span
                      style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Thanks
                      in advance,</span><o:p></o:p></p>
                  <p class="MsoNormal"> <o:p></o:p></p>
                  <div>
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                      <br>
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                      <o:p></o:p></p>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal" style="margin-bottom:12.0pt">-- <br>
                  <img id="_x0000_i1026"
                    src="https://nic.br/assinatura/assinatura-nic-lg.png"
                    alt="NIC.br | " moz-do-not-send="true" border="0"><span
                    class="bold2"><span style="font-size:9.0pt">Heitor
                      Ganzeli</span></span>
                  <br>
                  <span class="italic2"><span style="font-size:9.0pt">Analista
                      de Projetos/Projects Analyst</span></span>
                  <br>
                  <span
                    style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Centro
                    de Estudos e Pesquisas em Tecnologias de Redes e
                    Operações (Ceptro.br)<br>
                    +55 <span class="bold2">11 5509-3537</span> R.: <span
                      class="bold2">4077 </span></span><br>
                  <span
                    style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">INOC
                    22548*HSG<br>
                  </span><a
href="https://urldefense.proofpoint.com/v2/url?u=http-3A__nic.br&amp;d=DwMDaQ&amp;c=LFYZ-o9_HUMeMTSQicvjIg&amp;r=_6cen3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6zYMI&amp;m=fG1ocUH95zQ-PzyYzaD--CzygSO2jA_RSUpES0wjDpo&amp;s=MUCJBAT5t4EXSTjulqkhUKD6YwHRvVfOx0yzhS2FGfc&amp;e="
                    moz-do-not-send="true"><span
                      style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">www.nic.br</span></a><br>
                  <br>
                  <br>
                  <o:p></o:p></p>
              </div>
            </div>
          </blockquote>
          <div>
            <p class="MsoNormal" style="margin-bottom:12.0pt">-- <br>
              <img id="_x0000_i1027"
                src="https://nic.br/assinatura/assinatura-nic-lg.png"
                alt="NIC.br | " moz-do-not-send="true" border="0"><span
                class="bold3"><span style="font-size:9.0pt">Heitor
                  Ganzeli</span></span>
              <br>
              <span class="italic3"><span style="font-size:9.0pt">Analista
                  de Projetos/Projects Analyst</span></span>
              <br>
              <span style="font-size:9.0pt;font-family:&quot;Helvetica
                Neue&quot;">Centro de Estudos e Pesquisas em Tecnologias
                de Redes e Operações (Ceptro.br)<br>
                +55 <span class="bold3">11 5509-3537</span> R.: <span
                  class="bold3">4077 </span></span><br>
              <span style="font-size:9.0pt;font-family:&quot;Helvetica
                Neue&quot;">INOC 22548*HSG<br>
              </span><a
href="https://urldefense.proofpoint.com/v2/url?u=http-3A__nic.br&amp;d=DwMDaQ&amp;c=LFYZ-o9_HUMeMTSQicvjIg&amp;r=_6cen3Hn-e_hOm0BhY7aIpA58dd19Z9qGQsr8-6zYMI&amp;m=6p5VASQ5wD7b0yR1P86X7L9DD1DznoTcc0ObrTF4sls&amp;s=QOPZTCihknPSVf5ZFftCv9_ay06SEk8rjmb3st5mkAk&amp;e="
                moz-do-not-send="true"><span
                  style="font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">www.nic.br</span></a><br>
              <br>
              <o:p></o:p></p>
          </div>
        </div>
      </div>
    </blockquote>
    <div class="moz-signature">-- <br>
      <style>
.bold { font-weight: bold; }
.italic { font-style: italic; }
span, a { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;font-size: 12px;color: #000;text-decoration: none;font-weight: 300;line-height: 15px;font-stretch: condensed; }
img { float: left; margin-right: 20px; }
</style><img src="https://nic.br/assinatura/assinatura-nic-lg.png"
        alt="NIC.br | " style="float: left;margin-right: 20px;">
      <span class="bold" style="font-size: 12px;color: #000;line-height:
        15px;">Heitor Ganzeli</span> <br>
      <span class="italic" style="font-size: 12px;color:
        #000;line-height: 15px;">Analista de Projetos/Projects Analyst</span>
      <br>
      <span style="font-size: 12px;color: #000;line-height: 15px;">Centro
        de Estudos e Pesquisas em Tecnologias de Redes e Operações
        (Ceptro.br)<br>
      </span>
      <span style="font-size: 12px;color: #000;line-height: 15px;">+55 </span><span
        class="bold" style="color: #000;text-decoration: none;font-size:
        12px;color: #000;text-decoration: none;line-height: 15px;">11
        5509-3537</span><span style="font-size: 12px;color:
        #000;line-height: 15px;"> R.: </span><span class="bold"
        style="font-size: 12px;color: #000;line-height: 15px;">4077
      </span> <br>
      <span style="font-size: 12px;color: #000;line-height: 15px;"> </span><span
        class="bold" style="font-size: 12px;color: #000;line-height:
        15px;"></span>
      <span style="font-size: 12px;color: #000;line-height: 15px;">INOC
        22548*HSG<br>
      </span>
      <a href="http://nic.br" class="bold" style="color:
        #000;text-decoration: none;font-size: 12px;line-height: 15px;">www.nic.br</a><br>
      <br>
      <br>
    </div>
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From: "MORTON, ALFRED C (AL)" <acm@research.att.com>
To: Heitor Ganzeli <heitor@nic.br>, "ippm@ietf.org" <ippm@ietf.org>
Thread-Topic: [ippm] IPPM Metric Registry Concept of Roles
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