
From nobody Mon Oct  4 08:50:12 2021
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From: Carsten Bormann <cabo@tzi.org>
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Date: Mon, 4 Oct 2021 17:49:53 +0200
Cc: Francesca Palombini <francesca.palombini@ericsson.com>, The IESG <iesg@ietf.org>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>,  "opsawg-chairs@ietf.org" <opsawg-chairs@ietf.org>, "opsawg@ietf.org" <opsawg@ietf.org>, netmod@ietf.org
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Subject: Re: [netmod] [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)
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On 2021-10-04, at 13:34, mohamed.boucadair@orange.com wrote:
>=20
> bytes per second (bps),

Whoa.

I know that the IETF doesn=E2=80=99t usually care about precision in =
these things, but =E2=80=9Cbps=E2=80=9D is kitchen slang for =
=E2=80=9Cbit/s=E2=80=9D, so this is very confusing.

(Given that we have done the work in RFC 8428 and 8798, I=E2=80=99d =
rather see that we use it, instead of creating more confusion at each =
further step.
We do have ms and B/s in RFC 8798, because people using SenML asked for =
that.)

Gr=C3=BC=C3=9Fe, Carsten


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Subject: [netmod] Network Modeling (netmod) WG Virtual Meeting: 2021-10-12
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The Network Modeling (netmod) WG will hold
a virtual interim meeting on 2021-10-12 from 10:00 to 12:00 America/New_York (14:00 to 16:00 UTC).

Agenda:
Slides will be presented to guide the discussion.

Information about remote participation:
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Subject: [netmod] Murray Kucherawy's No Objection on draft-ietf-netmod-yang-instance-file-format-19: (with COMMENT)
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Murray Kucherawy has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-19: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

The shepherd writeup is incomplete with respect to the first question.

All of the SHOULDs in Section 2 leave me wondering under what conditions one
might legitimately deviate from what they are saying.  Since SHOULD offers a
choice, I recommend making this more clear.




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Date: Tue, 5 Oct 2021 09:05:21 +0200
Cc: Francesca Palombini <francesca.palombini@ericsson.com>, The IESG <iesg@ietf.org>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>,  "opsawg-chairs@ietf.org" <opsawg-chairs@ietf.org>, "opsawg@ietf.org" <opsawg@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
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Subject: Re: [netmod] [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)
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Hi Med,

> I confirm that what I meant is "bits per second" to align with =
rfc8299#6.12.1.

Ah.

> I'm actually for more explicit units similar to what we are using in =
another active spec:=20

As long as there is this confusion in YANG units, that is the only way =
that makes sense.
One little tweak I=E2=80=99d have for that spec:

> =3D=3D
>      enum bit-ps {
>        value 2;
>        description
>          "Bits per Second (bit/s).";
>      }
>      enum byte-ps {
>        value 3;
>        description
>          "Bytes per second (Byte/s).";

Maybe use the actual ISO/IEC 80000 notation here: B/s.
(For those that don=E2=80=99t know how ISO/IEC 80000 allocates =E2=80=9CB=E2=
=80=9D for byte, the legend =E2=80=9CBytes per second=E2=80=9D is =
unambiguous.)

>      }
> =3D=3D
>=20
> However, we are in a territory where we are trying to map as much to =
the above service model and hence use the same labels for the units.
>=20
> FWIW, RFC8466 used to have the following:
>=20
> =3D
>                  leaf pbs {
>                    type uint64;
>                    units "bps";
>                    description
>                      "Peak Burst Size.  It is measured in bytes per
>                       second.";
>                  }
> =3D
>=20
> ...which is weird.

This is really errata land, as =E2=80=9Cbps=E2=80=9D is used as the =
kitchen slang for =E2=80=9Cbit/s=E2=80=9D in all other cases (along with =
=E2=80=9Cmbps=E2=80=9D for Mbit/s, shudder).

> This is why we don't blindly inherit that draft-ietf-opsawg-l2nm and =
went for the following:=20
>=20
>                      leaf pbs {
>                        type uint64;
>                        units "bytes per second";
>                        description
>                          "Peak Burst Size.";
>                      }

I think this would also benefit from =E2=80=9CBytes per Second (B/s)=E2=80=
=9D.

Gr=C3=BC=C3=9Fe, Carsten

>=20
> Cheers,
> Med
>=20
>> -----Message d'origine-----
>> De : Carsten Bormann <cabo@tzi.org>
>> Envoy=C3=A9 : lundi 4 octobre 2021 17:50
>> =C3=80 : BOUCADAIR Mohamed INNOV/NET <mohamed.boucadair@orange.com>
>> Cc : Francesca Palombini <francesca.palombini@ericsson.com>; The IESG
>> <iesg@ietf.org>; draft-ietf-opsawg-l3sm-l3nm@ietf.org; opsawg-
>> chairs@ietf.org; opsawg@ietf.org; netmod@ietf.org
>> Objet : Re: [OPSAWG] Francesca Palombini's Discuss on =
draft-ietf-opsawg-
>> l3sm-l3nm-16: (with DISCUSS and COMMENT)
>>=20
>> On 2021-10-04, at 13:34, mohamed.boucadair@orange.com wrote:
>>>=20
>>> bytes per second (bps),
>>=20
>> Whoa.
>>=20
>> I know that the IETF doesn=E2=80=99t usually care about precision in =
these things,
>> but =E2=80=9Cbps=E2=80=9D is kitchen slang for =E2=80=9Cbit/s=E2=80=9D,=
 so this is very confusing.
>>=20
>> (Given that we have done the work in RFC 8428 and 8798, I=E2=80=99d =
rather see
>> that we use it, instead of creating more confusion at each further =
step.
>> We do have ms and B/s in RFC 8798, because people using SenML asked =
for
>> that.)
>>=20
>> Gr=C3=BC=C3=9Fe, Carsten
>=20
>=20
> =
__________________________________________________________________________=
_______________________________________________
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messages electroniques etant susceptibles d'alteration,
> Orange decline toute responsabilite si ce message a ete altere, =
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>=20
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>=20


From nobody Tue Oct  5 03:16:42 2021
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Subject: Re: [netmod] Murray Kucherawy's No Objection on draft-ietf-netmod-yang-instance-file-format-19: (with COMMENT)
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--------------CEBFADC4567E32D3E6BF1B87
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Hi Murray,

On 10/4/2021 8:25 PM, Murray Kucherawy via Datatracker wrote:
> Murray Kucherawy has entered the following ballot position for
> draft-ietf-netmod-yang-instance-file-format-19: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/blog/handling-iesg-ballot-positions/
> for more information about how to handle DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> The shepherd writeup is incomplete with respect to the first question.
>
> All of the SHOULDs in Section 2 leave me wondering under what conditions one
> might legitimately deviate from what they are saying.  Since SHOULD offers a
> choice, I recommend making this more clear.
The draft mentions some SHOULD related to the file name.
     Ex: The name of the instance data file SHOULD be of the form:
For those SHOULD, we followed the RFC 7950, 
https://datatracker.ietf.org/doc/html/rfc7950#section-5.2, which also 
used SHOULD

For this instance ...
To properly understand and use an instance data set, the user needs to 
know the content-schema. One of the following methods SHOULD be used:
... I don't recall why we have a SHOULD here. History I guess.
A MUST seems more appropriate and we propose to change to a MUST.

Regards, Benoit


--------------CEBFADC4567E32D3E6BF1B87
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<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    Hi Murray,<br>
    <br>
    <div class="moz-cite-prefix">On 10/4/2021 8:25 PM, Murray Kucherawy
      via Datatracker wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:163337193567.16247.16986222138590366273@ietfa.amsl.com">
      <pre class="moz-quote-pre" wrap="">Murray Kucherawy has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-19: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
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Please refer to <a class="moz-txt-link-freetext" href="https://www.ietf.org/blog/handling-iesg-ballot-positions/">https://www.ietf.org/blog/handling-iesg-ballot-positions/</a>
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
<a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/">https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/</a>



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

The shepherd writeup is incomplete with respect to the first question.

All of the SHOULDs in Section 2 leave me wondering under what conditions one
might legitimately deviate from what they are saying.  Since SHOULD offers a
choice, I recommend making this more clear.</pre>
    </blockquote>
    The draft mentions some SHOULD related to the file name.<br>
        Ex: The name of the instance data file SHOULD be of the form:<br>
    For those SHOULD, we followed the RFC 7950,
    <a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/html/rfc7950#section-5.2">https://datatracker.ietf.org/doc/html/rfc7950#section-5.2</a>, which
    also used SHOULD <br>
    <br>
    For this instance ...<br>
        <span style="color: rgb(34, 34, 34); font-family: &quot;Noto
      Sans&quot;, Arial, Helvetica, sans-serif; font-size: 14px;
      font-style: normal; font-variant-ligatures: normal;
      font-variant-caps: normal; font-weight: 400; letter-spacing:
      normal; orphans: 2; text-align: left; text-indent: 0px;
      text-transform: none; white-space: normal; widows: 2;
      word-spacing: 0px; -webkit-text-stroke-width: 0px;
      background-color: rgb(255, 255, 255); text-decoration-thickness:
      initial; text-decoration-style: initial; text-decoration-color:
      initial; display: inline !important; float: none;">To properly
      understand and use an instance data set, the user needs to know
      the content-schema. One of the following methods SHOULD be used:<br>
    </span>... I don't recall why we have a SHOULD here. History I
    guess. <br>
    A MUST seems more appropriate and we propose to change to a MUST.<br>
    <br>
    Regards, Benoit<br>
    <br>
  </body>
</html>

--------------CEBFADC4567E32D3E6BF1B87--


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Éric Vyncke has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-19: No Objection

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email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/blog/handling-iesg-ballot-positions/
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for the work put into this document.

Please find below some non-blocking COMMENT points (but replies would be
appreciated even if only for my own education), and some nits.

I hope that this helps to improve the document,

Regards,

-éric

== COMMENTS ==

Generic comment about the use of the word "file" (which means an object in a
file system for me) rather than something more generic (no suggestion to offer
though) ?

-- Section 1 --
The first 2 sentences are quite repetitive.

Is it about "offline delivery" or "exchange" ? At this point of reading the
document, it is still unclear in my mind what it is about... The rest of the
I-D made it clear.

Unclear which UC is either implemented or potential (even with the appendix);
could also add forward references to the appendix UC). Should the
implementation(s) be referenced if they are public ?

-- Section 1.1 --
Unsure why a "data set" should be named? The choice of words does not seem the
best fit (even though if I have no suggestions).

-- Section 2 --
Like some other ADs, I wonder why "The context data part MUST... except" is not
a "SHOULD" as there are exceptions.

What is the expected behaviour when the timestamp in the filename does not
match the meta data ?

-- Section 2.1 --
There is a "SHOULD" so when are exceptions/deviations acceptable ?

The description of "simplified" is really too simple ;-)

I would also appreciate that the order of the list matches the following
sub-sections order.

Thank you for using RFC 8792.

-- Section 4 --
Did the authors think about adding the party creating the file and adding an
optional signature in the file itself?

== NITS ==

-- Section 1 --
The first 2 sentences are quite repetitive. Missing "." At the end of the 1st §

Why is "Factory Default Setting" capitalised ?

-- Section 1.2 --
Why using the future tense "shall be" rather than "are" ?

-- Section 2.1.1 and others --
Suggest to warn the reader that the examples are further in the text in a
different section.

-- Section 6 --
A "," is missing.




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From: Francesca Palombini <francesca.palombini@ericsson.com>
To: Carsten Bormann <cabo@tzi.org>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
CC: The IESG <iesg@ietf.org>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "opsawg-chairs@ietf.org" <opsawg-chairs@ietf.org>, "opsawg@ietf.org" <opsawg@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)
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Subject: Re: [netmod] [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)
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Thanks Carsten for noticing this! I did overlook completely that bps was be=
ing used as bytes per seconds=85 Thanks Med for clarifying in this document=
 and for opening errata https://www.rfc-editor.org/errata/eid6703 . The OPS=
 ADs are on it, I am sure.

Francesca

From: Carsten Bormann <cabo@tzi.org>
Date: Tuesday, 5 October 2021 at 09:05
To: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>
Cc: Francesca Palombini <francesca.palombini@ericsson.com>, The IESG <iesg@=
ietf.org>, draft-ietf-opsawg-l3sm-l3nm@ietf.org <draft-ietf-opsawg-l3sm-l3n=
m@ietf.org>, opsawg-chairs@ietf.org <opsawg-chairs@ietf.org>, opsawg@ietf.o=
rg <opsawg@ietf.org>, netmod@ietf.org <netmod@ietf.org>
Subject: Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3=
sm-l3nm-16: (with DISCUSS and COMMENT)
Hi Med,

> I confirm that what I meant is "bits per second" to align with rfc8299#6.=
12.1.

Ah.

> I'm actually for more explicit units similar to what we are using in anot=
her active spec:

As long as there is this confusion in YANG units, that is the only way that=
 makes sense.
One little tweak I=92d have for that spec:

> =3D=3D
>      enum bit-ps {
>        value 2;
>        description
>          "Bits per Second (bit/s).";
>      }
>      enum byte-ps {
>        value 3;
>        description
>          "Bytes per second (Byte/s).";

Maybe use the actual ISO/IEC 80000 notation here: B/s.
(For those that don=92t know how ISO/IEC 80000 allocates =93B=94 for byte, =
the legend =93Bytes per second=94 is unambiguous.)

>      }
> =3D=3D
>
> However, we are in a territory where we are trying to map as much to the =
above service model and hence use the same labels for the units.
>
> FWIW, RFC8466 used to have the following:
>
> =3D
>                  leaf pbs {
>                    type uint64;
>                    units "bps";
>                    description
>                      "Peak Burst Size.  It is measured in bytes per
>                       second.";
>                  }
> =3D
>
> ...which is weird.

This is really errata land, as =93bps=94 is used as the kitchen slang for =
=93bit/s=94 in all other cases (along with =93mbps=94 for Mbit/s, shudder).

> This is why we don't blindly inherit that draft-ietf-opsawg-l2nm and went=
 for the following:
>
>                      leaf pbs {
>                        type uint64;
>                        units "bytes per second";
>                        description
>                          "Peak Burst Size.";
>                      }

I think this would also benefit from =93Bytes per Second (B/s)=94.

Gr=FC=DFe, Carsten

>
> Cheers,
> Med
>
>> -----Message d'origine-----
>> De : Carsten Bormann <cabo@tzi.org>
>> Envoy=E9 : lundi 4 octobre 2021 17:50
>> =C0 : BOUCADAIR Mohamed INNOV/NET <mohamed.boucadair@orange.com>
>> Cc : Francesca Palombini <francesca.palombini@ericsson.com>; The IESG
>> <iesg@ietf.org>; draft-ietf-opsawg-l3sm-l3nm@ietf.org; opsawg-
>> chairs@ietf.org; opsawg@ietf.org; netmod@ietf.org
>> Objet : Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-
>> l3sm-l3nm-16: (with DISCUSS and COMMENT)
>>
>> On 2021-10-04, at 13:34, mohamed.boucadair@orange.com wrote:
>>>
>>> bytes per second (bps),
>>
>> Whoa.
>>
>> I know that the IETF doesn=92t usually care about precision in these thi=
ngs,
>> but =93bps=94 is kitchen slang for =93bit/s=94, so this is very confusin=
g.
>>
>> (Given that we have done the work in RFC 8428 and 8798, I=92d rather see
>> that we use it, instead of creating more confusion at each further step.
>> We do have ms and B/s in RFC 8798, because people using SenML asked for
>> that.)
>>
>> Gr=FC=DFe, Carsten
>
>
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<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Thanks Ca=
rsten for noticing this! I did overlook completely that bps was being used =
as bytes per seconds=85 Thanks Med for clarifying in this document and for =
opening errata
<a href=3D"https://www.rfc-editor.org/errata/eid6703">https://www.rfc-edito=
r.org/errata/eid6703</a> . The OPS ADs are on it, I am sure.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Francesca=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">Carsten Bormann &lt;cabo@tzi.org&gt;<br>
<b>Date: </b>Tuesday, 5 October 2021 at 09:05<br>
<b>To: </b>mohamed.boucadair@orange.com &lt;mohamed.boucadair@orange.com&gt=
;<br>
<b>Cc: </b>Francesca Palombini &lt;francesca.palombini@ericsson.com&gt;, Th=
e IESG &lt;iesg@ietf.org&gt;, draft-ietf-opsawg-l3sm-l3nm@ietf.org &lt;draf=
t-ietf-opsawg-l3sm-l3nm@ietf.org&gt;, opsawg-chairs@ietf.org &lt;opsawg-cha=
irs@ietf.org&gt;, opsawg@ietf.org &lt;opsawg@ietf.org&gt;, netmod@ietf.org
 &lt;netmod@ietf.org&gt;<br>
<b>Subject: </b>Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-op=
sawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Hi Med,<br>
<br>
&gt; I confirm that what I meant is &quot;bits per second&quot; to align wi=
th rfc8299#6.12.1.<br>
<br>
Ah.<br>
<br>
&gt; I'm actually for more explicit units similar to what we are using in a=
nother active spec:
<br>
<br>
As long as there is this confusion in YANG units, that is the only way that=
 makes sense.<br>
One little tweak I=92d have for that spec:<br>
<br>
&gt; =3D=3D<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; enum bit-ps {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; value 2;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; description<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;Bits per S=
econd (bit/s).&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; enum byte-ps {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; value 3;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; description<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;Bytes per =
second (Byte/s).&quot;;<br>
<br>
Maybe use the actual ISO/IEC 80000 notation here: B/s.<br>
(For those that don=92t know how ISO/IEC 80000 allocates =93B=94 for byte, =
the legend =93Bytes per second=94 is unambiguous.)<br>
<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
&gt; =3D=3D<br>
&gt; <br>
&gt; However, we are in a territory where we are trying to map as much to t=
he above service model and hence use the same labels for the units.<br>
&gt; <br>
&gt; FWIW, RFC8466 used to have the following:<br>
&gt; <br>
&gt; =3D<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; leaf pbs {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type uint64;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units &quot;bps&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; description<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;Peak Burst Si=
ze.&nbsp; It is measured in bytes per<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; second.&quot;=
;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
&gt; =3D<br>
&gt; <br>
&gt; ...which is weird.<br>
<br>
This is really errata land, as =93bps=94 is used as the kitchen slang for =
=93bit/s=94 in all other cases (along with =93mbps=94 for Mbit/s, shudder).=
<br>
<br>
&gt; This is why we don't blindly inherit that draft-ietf-opsawg-l2nm and w=
ent for the following:
<br>
&gt; <br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; leaf pbs {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type ui=
nt64;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units &=
quot;bytes per second&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; descrip=
tion<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; &quot;Peak Burst Size.&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
<br>
I think this would also benefit from =93Bytes per Second (B/s)=94.<br>
<br>
Gr=FC=DFe, Carsten<br>
<br>
&gt; <br>
&gt; Cheers,<br>
&gt; Med<br>
&gt; <br>
&gt;&gt; -----Message d'origine-----<br>
&gt;&gt; De : Carsten Bormann &lt;cabo@tzi.org&gt;<br>
&gt;&gt; Envoy=E9 : lundi 4 octobre 2021 17:50<br>
&gt;&gt; =C0 : BOUCADAIR Mohamed INNOV/NET &lt;mohamed.boucadair@orange.com=
&gt;<br>
&gt;&gt; Cc : Francesca Palombini &lt;francesca.palombini@ericsson.com&gt;;=
 The IESG<br>
&gt;&gt; &lt;iesg@ietf.org&gt;; draft-ietf-opsawg-l3sm-l3nm@ietf.org; opsaw=
g-<br>
&gt;&gt; chairs@ietf.org; opsawg@ietf.org; netmod@ietf.org<br>
&gt;&gt; Objet : Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-o=
psawg-<br>
&gt;&gt; l3sm-l3nm-16: (with DISCUSS and COMMENT)<br>
&gt;&gt; <br>
&gt;&gt; On 2021-10-04, at 13:34, mohamed.boucadair@orange.com wrote:<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; bytes per second (bps),<br>
&gt;&gt; <br>
&gt;&gt; Whoa.<br>
&gt;&gt; <br>
&gt;&gt; I know that the IETF doesn=92t usually care about precision in the=
se things,<br>
&gt;&gt; but =93bps=94 is kitchen slang for =93bit/s=94, so this is very co=
nfusing.<br>
&gt;&gt; <br>
&gt;&gt; (Given that we have done the work in RFC 8428 and 8798, I=92d rath=
er see<br>
&gt;&gt; that we use it, instead of creating more confusion at each further=
 step.<br>
&gt;&gt; We do have ms and B/s in RFC 8798, because people using SenML aske=
d for<br>
&gt;&gt; that.)<br>
&gt;&gt; <br>
&gt;&gt; Gr=FC=DFe, Carsten<br>
&gt; <br>
&gt; <br>
&gt; ______________________________________________________________________=
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From: "Rob Wilton (rwilton)" <rwilton@cisco.com>
To: Francesca Palombini <francesca.palombini=40ericsson.com@dmarc.ietf.org>, Carsten Bormann <cabo@tzi.org>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
CC: "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "opsawg@ietf.org" <opsawg@ietf.org>, "opsawg-chairs@ietf.org" <opsawg-chairs@ietf.org>, The IESG <iesg@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)
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Subject: Re: [netmod] [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)
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Carsten & Med,

Thanks for raising this.  I agree with the errata, but this will need to be=
 hold for doc update, because we cannot create a different revision of a YA=
NG module through the errata process.

Thanks,
Rob


From: iesg <iesg-bounces@ietf.org> On Behalf Of Francesca Palombini
Sent: 05 October 2021 15:12
To: Carsten Bormann <cabo@tzi.org>; mohamed.boucadair@orange.com
Cc: draft-ietf-opsawg-l3sm-l3nm@ietf.org; opsawg@ietf.org; opsawg-chairs@ie=
tf.org; The IESG <iesg@ietf.org>; netmod@ietf.org
Subject: Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3=
sm-l3nm-16: (with DISCUSS and COMMENT)

Thanks Carsten for noticing this! I did overlook completely that bps was be=
ing used as bytes per seconds... Thanks Med for clarifying in this document=
 and for opening errata https://www.rfc-editor.org/errata/eid6703 . The OPS=
 ADs are on it, I am sure.

Francesca

From: Carsten Bormann <cabo@tzi.org<mailto:cabo@tzi.org>>
Date: Tuesday, 5 October 2021 at 09:05
To: mohamed.boucadair@orange.com<mailto:mohamed.boucadair@orange.com> <moha=
med.boucadair@orange.com<mailto:mohamed.boucadair@orange.com>>
Cc: Francesca Palombini <francesca.palombini@ericsson.com<mailto:francesca.=
palombini@ericsson.com>>, The IESG <iesg@ietf.org<mailto:iesg@ietf.org>>, d=
raft-ietf-opsawg-l3sm-l3nm@ietf.org<mailto:draft-ietf-opsawg-l3sm-l3nm@ietf=
.org> <draft-ietf-opsawg-l3sm-l3nm@ietf.org<mailto:draft-ietf-opsawg-l3sm-l=
3nm@ietf.org>>, opsawg-chairs@ietf.org<mailto:opsawg-chairs@ietf.org> <opsa=
wg-chairs@ietf.org<mailto:opsawg-chairs@ietf.org>>, opsawg@ietf.org<mailto:=
opsawg@ietf.org> <opsawg@ietf.org<mailto:opsawg@ietf.org>>, netmod@ietf.org=
<mailto:netmod@ietf.org> <netmod@ietf.org<mailto:netmod@ietf.org>>
Subject: Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-l3=
sm-l3nm-16: (with DISCUSS and COMMENT)
Hi Med,

> I confirm that what I meant is "bits per second" to align with rfc8299#6.=
12.1.

Ah.

> I'm actually for more explicit units similar to what we are using in anot=
her active spec:

As long as there is this confusion in YANG units, that is the only way that=
 makes sense.
One little tweak I'd have for that spec:

> =3D=3D
>      enum bit-ps {
>        value 2;
>        description
>          "Bits per Second (bit/s).";
>      }
>      enum byte-ps {
>        value 3;
>        description
>          "Bytes per second (Byte/s).";

Maybe use the actual ISO/IEC 80000 notation here: B/s.
(For those that don't know how ISO/IEC 80000 allocates "B" for byte, the le=
gend "Bytes per second" is unambiguous.)

>      }
> =3D=3D
>
> However, we are in a territory where we are trying to map as much to the =
above service model and hence use the same labels for the units.
>
> FWIW, RFC8466 used to have the following:
>
> =3D
>                  leaf pbs {
>                    type uint64;
>                    units "bps";
>                    description
>                      "Peak Burst Size.  It is measured in bytes per
>                       second.";
>                  }
> =3D
>
> ...which is weird.

This is really errata land, as "bps" is used as the kitchen slang for "bit/=
s" in all other cases (along with "mbps" for Mbit/s, shudder).

> This is why we don't blindly inherit that draft-ietf-opsawg-l2nm and went=
 for the following:
>
>                      leaf pbs {
>                        type uint64;
>                        units "bytes per second";
>                        description
>                          "Peak Burst Size.";
>                      }

I think this would also benefit from "Bytes per Second (B/s)".

Gr=FC=DFe, Carsten

>
> Cheers,
> Med
>
>> -----Message d'origine-----
>> De : Carsten Bormann <cabo@tzi.org<mailto:cabo@tzi.org>>
>> Envoy=E9 : lundi 4 octobre 2021 17:50
>> =C0 : BOUCADAIR Mohamed INNOV/NET <mohamed.boucadair@orange.com<mailto:m=
ohamed.boucadair@orange.com>>
>> Cc : Francesca Palombini <francesca.palombini@ericsson.com<mailto:france=
sca.palombini@ericsson.com>>; The IESG
>> <iesg@ietf.org<mailto:iesg@ietf.org>>; draft-ietf-opsawg-l3sm-l3nm@ietf.=
org<mailto:draft-ietf-opsawg-l3sm-l3nm@ietf.org>; opsawg-
>> chairs@ietf.org<mailto:chairs@ietf.org>; opsawg@ietf.org<mailto:opsawg@i=
etf.org>; netmod@ietf.org<mailto:netmod@ietf.org>
>> Objet : Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-opsawg-
>> l3sm-l3nm-16: (with DISCUSS and COMMENT)
>>
>> On 2021-10-04, at 13:34, mohamed.boucadair@orange.com<mailto:mohamed.bou=
cadair@orange.com> wrote:
>>>
>>> bytes per second (bps),
>>
>> Whoa.
>>
>> I know that the IETF doesn't usually care about precision in these thing=
s,
>> but "bps" is kitchen slang for "bit/s", so this is very confusing.
>>
>> (Given that we have done the work in RFC 8428 and 8798, I'd rather see
>> that we use it, instead of creating more confusion at each further step.
>> We do have ms and B/s in RFC 8798, because people using SenML asked for
>> that.)
>>
>> Gr=FC=DFe, Carsten
>
>
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<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Carsten &=
amp; Med,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Thanks fo=
r raising this.&nbsp; I agree with the errata, but this will need to be hol=
d for doc update, because we cannot create a different revision of a YANG m=
odule through the errata process.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Thanks,<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Rob<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
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<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span lang=3D"EN-US"=
>From:</span></b><span lang=3D"EN-US"> iesg &lt;iesg-bounces@ietf.org&gt;
<b>On Behalf Of </b>Francesca Palombini<br>
<b>Sent:</b> 05 October 2021 15:12<br>
<b>To:</b> Carsten Bormann &lt;cabo@tzi.org&gt;; mohamed.boucadair@orange.c=
om<br>
<b>Cc:</b> draft-ietf-opsawg-l3sm-l3nm@ietf.org; opsawg@ietf.org; opsawg-ch=
airs@ietf.org; The IESG &lt;iesg@ietf.org&gt;; netmod@ietf.org<br>
<b>Subject:</b> Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-op=
sawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:EN-US">Thanks Carsten for noticing this! I did overlook comple=
tely that bps was being used as bytes per seconds&#8230; Thanks Med for cla=
rifying in this document and for opening errata
<a href=3D"https://www.rfc-editor.org/errata/eid6703">https://www.rfc-edito=
r.org/errata/eid6703</a> . The OPS ADs are on it, I am sure.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:EN-US">Francesca<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:72.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">Carsten Bormann &lt;<a href=3D"mailto:ca=
bo@tzi.org">cabo@tzi.org</a>&gt;<br>
<b>Date: </b>Tuesday, 5 October 2021 at 09:05<br>
<b>To: </b><a href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadai=
r@orange.com</a> &lt;<a href=3D"mailto:mohamed.boucadair@orange.com">mohame=
d.boucadair@orange.com</a>&gt;<br>
<b>Cc: </b>Francesca Palombini &lt;<a href=3D"mailto:francesca.palombini@er=
icsson.com">francesca.palombini@ericsson.com</a>&gt;, The IESG &lt;<a href=
=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&gt;,
<a href=3D"mailto:draft-ietf-opsawg-l3sm-l3nm@ietf.org">draft-ietf-opsawg-l=
3sm-l3nm@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-opsawg-l3sm-l3nm@iet=
f.org">draft-ietf-opsawg-l3sm-l3nm@ietf.org</a>&gt;,
<a href=3D"mailto:opsawg-chairs@ietf.org">opsawg-chairs@ietf.org</a> &lt;<a=
 href=3D"mailto:opsawg-chairs@ietf.org">opsawg-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:opsawg@ietf.org">opsawg@ietf.org</a> &lt;<a href=3D"mailt=
o:opsawg@ietf.org">opsawg@ietf.org</a>&gt;,
<a href=3D"mailto:netmod@ietf.org">netmod@ietf.org</a> &lt;<a href=3D"mailt=
o:netmod@ietf.org">netmod@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-op=
sawg-l3sm-l3nm-16: (with DISCUSS and COMMENT)<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">Hi Med,<br>
<br>
&gt; I confirm that what I meant is &quot;bits per second&quot; to align wi=
th rfc8299#6.12.1.<br>
<br>
Ah.<br>
<br>
&gt; I'm actually for more explicit units similar to what we are using in a=
nother active spec:
<br>
<br>
As long as there is this confusion in YANG units, that is the only way that=
 makes sense.<br>
One little tweak I&#8217;d have for that spec:<br>
<br>
&gt; =3D=3D<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; enum bit-ps {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; value 2;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; description<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;Bits per S=
econd (bit/s).&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; enum byte-ps {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; value 3;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; description<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;Bytes per =
second (Byte/s).&quot;;<br>
<br>
Maybe use the actual ISO/IEC 80000 notation here: B/s.<br>
(For those that don&#8217;t know how ISO/IEC 80000 allocates &#8220;B&#8221=
; for byte, the legend &#8220;Bytes per second&#8221; is unambiguous.)<br>
<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
&gt; =3D=3D<br>
&gt; <br>
&gt; However, we are in a territory where we are trying to map as much to t=
he above service model and hence use the same labels for the units.<br>
&gt; <br>
&gt; FWIW, RFC8466 used to have the following:<br>
&gt; <br>
&gt; =3D<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; leaf pbs {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type uint64;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units &quot;bps&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; description<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;Peak Burst Si=
ze.&nbsp; It is measured in bytes per<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; second.&quot;=
;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
&gt; =3D<br>
&gt; <br>
&gt; ...which is weird.<br>
<br>
This is really errata land, as &#8220;bps&#8221; is used as the kitchen sla=
ng for &#8220;bit/s&#8221; in all other cases (along with &#8220;mbps&#8221=
; for Mbit/s, shudder).<br>
<br>
&gt; This is why we don't blindly inherit that draft-ietf-opsawg-l2nm and w=
ent for the following:
<br>
&gt; <br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; leaf pbs {<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type ui=
nt64;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units &=
quot;bytes per second&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; descrip=
tion<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; &quot;Peak Burst Size.&quot;;<br>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>
<br>
I think this would also benefit from &#8220;Bytes per Second (B/s)&#8221;.<=
br>
<br>
Gr=FC=DFe, Carsten<br>
<br>
&gt; <br>
&gt; Cheers,<br>
&gt; Med<br>
&gt; <br>
&gt;&gt; -----Message d'origine-----<br>
&gt;&gt; De : Carsten Bormann &lt;<a href=3D"mailto:cabo@tzi.org">cabo@tzi.=
org</a>&gt;<br>
&gt;&gt; Envoy=E9 : lundi 4 octobre 2021 17:50<br>
&gt;&gt; =C0 : BOUCADAIR Mohamed INNOV/NET &lt;<a href=3D"mailto:mohamed.bo=
ucadair@orange.com">mohamed.boucadair@orange.com</a>&gt;<br>
&gt;&gt; Cc : Francesca Palombini &lt;<a href=3D"mailto:francesca.palombini=
@ericsson.com">francesca.palombini@ericsson.com</a>&gt;; The IESG<br>
&gt;&gt; &lt;<a href=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&gt;; <a hre=
f=3D"mailto:draft-ietf-opsawg-l3sm-l3nm@ietf.org">
draft-ietf-opsawg-l3sm-l3nm@ietf.org</a>; opsawg-<br>
&gt;&gt; <a href=3D"mailto:chairs@ietf.org">chairs@ietf.org</a>; <a href=3D=
"mailto:opsawg@ietf.org">
opsawg@ietf.org</a>; <a href=3D"mailto:netmod@ietf.org">netmod@ietf.org</a>=
<br>
&gt;&gt; Objet : Re: [OPSAWG] Francesca Palombini's Discuss on draft-ietf-o=
psawg-<br>
&gt;&gt; l3sm-l3nm-16: (with DISCUSS and COMMENT)<br>
&gt;&gt; <br>
&gt;&gt; On 2021-10-04, at 13:34, <a href=3D"mailto:mohamed.boucadair@orang=
e.com">mohamed.boucadair@orange.com</a> wrote:<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; bytes per second (bps),<br>
&gt;&gt; <br>
&gt;&gt; Whoa.<br>
&gt;&gt; <br>
&gt;&gt; I know that the IETF doesn&#8217;t usually care about precision in=
 these things,<br>
&gt;&gt; but &#8220;bps&#8221; is kitchen slang for &#8220;bit/s&#8221;, so=
 this is very confusing.<br>
&gt;&gt; <br>
&gt;&gt; (Given that we have done the work in RFC 8428 and 8798, I&#8217;d =
rather see<br>
&gt;&gt; that we use it, instead of creating more confusion at each further=
 step.<br>
&gt;&gt; We do have ms and B/s in RFC 8798, because people using SenML aske=
d for<br>
&gt;&gt; that.)<br>
&gt;&gt; <br>
&gt;&gt; Gr=FC=DFe, Carsten<br>
&gt; <br>
&gt; <br>
&gt; ______________________________________________________________________=
___________________________________________________<br>
&gt; <br>
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es electroniques etant susceptibles d'alteration,<br>
&gt; Orange decline toute responsabilite si ce message a ete altere, deform=
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&gt; This message and its attachments may contain confidential or privilege=
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&gt; <o:p></o:p></p>
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Subject: Re: [netmod] Network Modeling (netmod) WG Virtual Meeting: 2021-10-12
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Folks,

Attached is a Calendar invite for next week=E2=80=99s virtual interim on =
System Configuration.

FWIW, the selected time slot scored the highest on the Doodle poll.   =
Everyone except one (Frank) could make it, with a couple being =E2=80=9Cif=
 need be=E2=80=9D (thank you!)

Slides have been prepared summarizing the on-list discussion to guide =
the discussion.   The slides primarily regard objectives, but =
necessarily consider solution options, pointing out those that are =
viable and why others aren=E2=80=99t.

Cheers!
Kent



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> On Oct 4, 2021, at 1:05 PM, IESG Secretary <iesg-secretary@ietf.org> =
wrote:
>=20
> The Network Modeling (netmod) WG will hold
> a virtual interim meeting on 2021-10-12 from 10:00 to 12:00 =
America/New_York (14:00 to 16:00 UTC).
>=20
> Agenda:
> Slides will be presented to guide the discussion.
>=20
> Information about remote participation:
> =
https://ietf.webex.com/ietf/j.php?MTID=3Dmf0cca6ee36dd3c9cb9e78b2f47696534=

>=20
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod


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Subject: Re: [netmod]  =?utf-8?q?=C3=89ric_Vyncke=27s_No_Objection_on_draft-ie?= =?utf-8?q?tf-netmod-yang-instance-file-format-19=3A_=28with_COMMENT=29?=
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Hello Eric,
Thank you for the thorough review. I used many of your comments to =
improve the draft. See my detailed answers below as BALAZS:
Regards Balazs

-----Original Message-----
From: =C3=89ric Vyncke via Datatracker <noreply@ietf.org>=20
Sent: 2021. okt=C3=B3ber 5., kedd 13:27
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-netmod-yang-instance-file-format@ietf.org; =
netmod-chairs@ietf.org; netmod@ietf.org; Kent Watsen =
<kent+ietf@watsen.net>; kent+ietf@watsen.net
Subject: =C3=89ric Vyncke's No Objection on =
draft-ietf-netmod-yang-instance-file-format-19: (with COMMENT)

=C3=89ric Vyncke has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-19: No Objection

When responding, please keep the subject line intact and reply to all =
email addresses included in the To and CC lines. (Feel free to cut this =
introductory paragraph, however.)


Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for the work put into this document.

Please find below some non-blocking COMMENT points (but replies would be =
appreciated even if only for my own education), and some nits.

I hope that this helps to improve the document,

Regards,

-=C3=A9ric

=3D=3D COMMENTS =3D=3D

Generic comment about the use of the word "file" (which means an object =
in a file system for me) rather than something more generic (no =
suggestion to offer
though) ?
BALAZS: In most cases we do actually mean an object in a file system.=20
In some cases not: In UC6 Allowing YANG instance data to be carried =
within  other IPC message formats.=20
This is the exact reason while we differentiate between an =
instance-data-set and an instance-data-file.=20
An instance-data-set may be contained in a file, but may be transferred =
in a protocol message.

-- Section 1 --
The first 2 sentences are quite repetitive.
BALAZS: The first sentence states that we need such data off-lie
The second sentence states that this offline data may be needed in 3 =
different phases design, implementation or even later after the server =
and the YANG module is up and running, I just don't have access to it.
Reworded to clarify this.

Is it about "offline delivery" or "exchange" ? At this point of reading =
the document, it is still unclear in my mind what it is about... The =
rest of the I-D made it clear.
BALAZS: The draft is only about defining a format for YANG instance =
data.=20
Naturally once you have a data format it could be used both to deliver =
the information offline in a file or to exchange information using the =
format in an protocol message.
Most use-cases mentioned are about Offline delivery.
.

Unclear which UC is either implemented or potential (even with the =
appendix); could also add forward references to the appendix UC). Should =
the
implementation(s) be referenced if they are public ?
BALAZS:  As stated in section 1. Use cases are listed only as examples. =
This draft is only about defining a format for YANG Instance Data.
I know UC1,2,3 are already implemented by more than one company, but as =
this draft is only about the format, I don't think we should reference =
the implementations.=20
Also, UC1 is already utilized in 2 other internet drafts.

-- Section 1.1 --
Unsure why a "data set" should be named? The choice of words does not =
seem the best fit (even though if I have no suggestions).
BALAZS: Specific data sets need to be identified. What is it about? When =
was it prepared?=20
 I want a way to identify the specific data set. So, we give it a name =
(and a revision/timestamp).  This is why its named.
Any better suggestion?

-- Section 2 --
Like some other ADs, I wonder why "The context data part MUST... except" =
is not a "SHOULD" as there are exceptions.

What is the expected behaviour when the timestamp in the filename does =
not match the meta data ?
BALAZS: We are following RFC7950 in which YANG related file names are =
recommended with a SHOULD but not prescribed with a MUST.
Some people wanted to use separate timestamps when the instance-data-set =
is created and when it is put into an instance-data-file.
This draft does not prescribe an expected behavior of the tools, it just =
defines the format.

-- Section 2.1 --
There is a "SHOULD" so when are exceptions/deviations acceptable ?
BALAZS: Based on your and Murray's comments, this will be changed to =
MUST.

The description of "simplified" is really too simple ;-)
BALAZS: Added  "only the module name and revision-date is used "

I would also appreciate that the order of the list matches the following =
sub-sections order.
BALAZS: OK, updated.

Thank you for using RFC 8792.

-- Section 4 --
Did the authors think about adding the party creating the file and =
adding an optional signature in the file itself?
BALAZS:  Not specifically. A basic format is defined, but it is =
indicated in section 2, that:
"Some metadata items are defined in the YANG module =
"ietf-yang-instance-data", but other items MAY be used."

=3D=3D NITS =3D=3D

-- Section 1 --
The first 2 sentences are quite repetitive. Missing "." At the end of =
the 1st =C2=A7
BALAZS: The first sentence states that we need such data off-lie
The second sentence states that this offline data may be needed in 3 =
different phases design, implementation or even later after the server =
and the YANG module is up and running, I just don't have access to it.
Reworded to clarify this.
Added last full stop.

Why is "Factory Default Setting" capitalised ?
BALAZS: OK, I decapitalize it (If there is such a word  :-)  ).

-- Section 1.2 --
Why using the future tense "shall be" rather than "are" ?
BALAZS: The principles are not facts that just exists, they are rather =
goals we fulfill by defining this format. . I though "shall" would be =
the correct   term.

-- Section 2.1.1 and others --
Suggest to warn the reader that the examples are further in the text in =
a different section.
BALAZS: OK, will add it.

-- Section 6 --
A "," is missing.
BALAZS: OK, will correct it


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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/0DfkbLn3ZJh6ymRHkuZq8MNbZjg>
Subject: [netmod] Reply to Lars Eggert's comments on draft-ietf-netmod-yang-instance-file-format-19
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Hello,
This is our reply to Lar's Eggert's comments. The original comments can be 
read at 
https://datatracker.ietf.org/iesg/agenda/documents/#draft-ietf-netmod-yang-instance-file-format_lars-eggert.
Thanks for the review. I used most of your suggestions to improve the draft.
See detailed replies as "BALAZS:" below.
Regards Balazs

=========================================================================================
All comments below are about very minor potential issues that you may choose 
to
address in some way - or ignore - as you see fit. Some were flagged by
automated tools (via https://github.com/larseggert/ietf-reviewtool), so there
will likely be some false positives. There is no need to let me know what you
did with these suggestions.

Section 3.2. , paragraph 4, nit:
> ance data; the instance data itself is is contained only in the 
> 'content-data
>                                     ^^^^^
Possible typo: you repeated a word.
BALAZS: Will be corrected.

Section 3.2. , paragraph 5, nit:
> ove if the module gets changed // in anyway during reviews or RFC editor 
> proc
>                                   ^^^^^^^^^
Did you mean "in any way"?
BALAZS: Yes, will be corrected.

Section 3.2. , paragraph 19, nit:
>  data file needs to be handled in a secure way as mentioned below. The secur
>                                ^^^^^^^^^^^^^^^
Consider replacing this phrase with the adverb "securely" to avoid wordiness.
BALAZS: Will be corrected.

Section 5.2. , paragraph 1, nit:
>  v08 - v09 * Removed reference to similar to get reply * Introduced artwork
>                                ^^^^^^^^^^^^^
Typo. Did you mean "too similar to"?
BALAZS: Earlier the format was described as similar to the response of aNETCONF 
get operation. Updated it to make it more understandable.

These URLs in the document did not return content:
 * https://datatracker.ietf.org/wg/netmodf/





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Subject: [netmod] I-D Action: draft-ietf-netmod-yang-instance-file-format-20.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Network Modeling WG of the IETF.

        Title           : YANG Instance Data File Format
        Authors         : Balazs Lengyel
                          Benoit Claise
	Filename        : draft-ietf-netmod-yang-instance-file-format-20.txt
	Pages           : 28
	Date            : 2021-10-05

Abstract:
   There is a need to document data defined in YANG models at design
   time, implementation time or when a live server is unavailable.  This
   document specifies a standard file format for YANG instance data,
   which follows the syntax and semantics of existing YANG models, and
   annotates it with metadata.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-netmod-yang-instance-file-format-20

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-yang-instance-file-format-20


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From: Roman Danyliw via Datatracker <noreply@ietf.org>
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Subject: [netmod] Roman Danyliw's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Roman Danyliw has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

** Section 2.
instance-data-set-name ['@' ( revision-date / timestamp ) ]
                     ( '.xml' / '.json' )

A syntax for an instance data file name is specified with normative language. 
However, this format is not explained is cited.

** Section 2. Editorial.
OLD
If the leaf "name" is present in the instance data header, its value
   SHOULD be used for the "instance-data-set-name"

NEW
If the leaf "name" is present in the instance data header, its value
   SHOULD be used for the "instance-data-set-name" in the filename.

** Section 2.

Description of the instance data set.  The description SHOULD
         contain information whether and how the data can change during
         the lifetime of the server

I found this definition of the description confusing as Figure 1 – 3 don’t seem
to describe “whether and how the data” will change.

** Section 2.1.1.  Per “The inline-yang-library anydata data node carries
instance data (conforming to ietf-yang-library@2019-01-04)”, please provide a
reference to “ietf-yang-library@2019-01-04”.

** Section 4.  Please note the risk of using same-schema-as-file, especially if
these configs are not integrity protected or received from outside sources. 
Per https://, there are the risks of loading remote content.  Section 7 of
RFC3986 is a good reference.  Per file://, there are things list directory
traversal.

** Section 4.  Per “The header part is not security sensitive with one possible
exception … the URI method”, I’m not sure that such a strong statement can be
made given the lack of application context.  For example, the description leaf
in the header could include sensitive information, say ‘Latest test router
config for new super secret Aqua-Violet flying car project’.  This text needs
to either have a caution that that this header is "unprotected so do not put in
sensitive information unless this file is protected", or clarify that more in
the header than the URI could be sensitive.

** Section 4.  Thanks for the language trying to create equivalency between the
protections of the file and the YANG store that would house it on a live
system.  Recommend making this text clear to say this applies to both at rest
and in motion data.

OLD
The same kind of handling should be applied, that would be
   needed for the result of a read operation returning the same data.

NEW (roughly)
The same kind of handling should be applied to this file at rest and in transit
that would be needed for the result of a read operation returning the same
data.  These in-transit protection mechanisms will also mitigate integrity
issues when transporting the file.




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Zaheduzzaman Sarker has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thanks for the efforts on this document.

I have following comments, by addressing them I believe will improve the
document quality

- Section 2.1 : Should it not say if the "content-schema" node exists then one
of the methods MUST be used? as I see the specification of content schema is a
SHOULD, hence may not be included for whatever reason.

- Section 4 : it says

    Instance data files may contain sensitive data.

  OK, but what should be taken into consideration when putting the sensitive
  data in the data file. It feels like there should be more information
  provided to the user of the specification for actually materialize the
  statement made here.




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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/1xaJvz41cJMUdkvgrqo9SSedjiw>
Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Hello Zaheduzzaman,
Thank you for the review.=20
See detailed replies as "BALAZS:" below.
Regards Balazs

-----Original Message-----
From: netmod <netmod-bounces@ietf.org> On Behalf Of Zaheduzzaman Sarker =
via
Datatracker
Sent: 2021. okt=F3ber 6., szerda 8:02
To: The IESG <iesg@ietf.org>
Cc: netmod-chairs@ietf.org;
draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
Subject: [netmod] Zaheduzzaman Sarker's No Objection on
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

Zaheduzzaman Sarker has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

When responding, please keep the subject line intact and reply to all =
email
addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat
/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thanks for the efforts on this document.

I have following comments, by addressing them I believe will improve the
document quality

- Section 2.1 : Should it not say if the "content-schema" node exists =
then
one of the methods MUST be used? as I see the specification of content
schema is a SHOULD, hence may not be included for whatever reason.
BALAZS: In accordance with your comment the SHOULD will be changed to =
MUST.
However, that still allows " External Method: Do not include the
"content-schema" node;"
People stated that when instance files are used repeatedly (a new file
generated every few seconds) in a closed, well defined environment,  the
content-schema may already be known. In this case it is not necessary to
include it in the file.

- Section 4 : it says

    Instance data files may contain sensitive data.

  OK, but what should be taken into consideration when putting the =
sensitive
  data in the data file. It feels like there should be more information
  provided to the user of the specification for actually materialize the
  statement made here.
BALAZS: Instance data files may be used in many different use-cases.=20
Whether the data within is sensitive is completely dependent on the =
content
schema applicable to the use-case.
The draft contains:
" The security sensitivity of the instance data in the content part is
   completely dependent on the content schema."
Any suggestions about what else we could say?


_______________________________________________
netmod mailing list
netmod@ietf.org
https://www.ietf.org/mailman/listinfo/netmod

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Subject: Re: [netmod]  =?utf-8?q?=C3=89ric_Vyncke=27s_No_Objection_on_draft-ie?= =?utf-8?q?tf-netmod-yang-instance-file-format-19=3A_=28with_COMMENT=29?=
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Hello Eric,
See some more answers as BALAZS2.
Regards Balazs

-----Original Message-----
From: Eric Vyncke (evyncke) <evyncke=3D40cisco.com@dmarc.ietf.org>=20
Sent: 2021. okt=C3=B3ber 5., kedd 23:19
To: Bal=C3=A1zs Lengyel <balazs.lengyel@ericsson.com>; The IESG =
<iesg@ietf.org>; Benoit Claise <benoit.claise@huawei.com>
Cc: netmod-chairs@ietf.org; Kent Watsen <kent+ietf@watsen.net>; =
draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
Subject: Re: =C3=89ric Vyncke's No Objection on =
draft-ietf-netmod-yang-instance-file-format-19: (with COMMENT)

Hello Bal=C3=A1zs,

Thank you for your quick reply and your actions. My comments are =
non-blocking anyway ;-) see my replies prefixed with EV>

Regards

-=C3=A9ric

=EF=BB=BFOn 05/10/2021, 18:10, "iesg on behalf of Bal=C3=A1zs Lengyel" =
<iesg-bounces@ietf.org on behalf of =
balazs.lengyel=3D40ericsson.com@dmarc.ietf.org> wrote:

    Hello Eric,
    Thank you for the thorough review. I used many of your comments to =
improve the draft. See my detailed answers below as BALAZS:
    Regards Balazs

    -----Original Message-----
    From: =C3=89ric Vyncke via Datatracker <noreply@ietf.org>=20
    Sent: 2021. okt=C3=B3ber 5., kedd 13:27
    To: The IESG <iesg@ietf.org>
    Cc: draft-ietf-netmod-yang-instance-file-format@ietf.org; =
netmod-chairs@ietf.org; netmod@ietf.org; Kent Watsen =
<kent+ietf@watsen.net>; kent+ietf@watsen.net
    Subject: =C3=89ric Vyncke's No Objection on =
draft-ietf-netmod-yang-instance-file-format-19: (with COMMENT)

    =C3=89ric Vyncke has entered the following ballot position for
    draft-ietf-netmod-yang-instance-file-format-19: No Objection

    When responding, please keep the subject line intact and reply to =
all email addresses included in the To and CC lines. (Feel free to cut =
this introductory paragraph, however.)


    Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
    for more information about how to handle DISCUSS and COMMENT =
positions.


    The document, along with other ballot positions, can be found here:
    =
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat/



    =
----------------------------------------------------------------------
    COMMENT:
    =
----------------------------------------------------------------------

    Thank you for the work put into this document.

    Please find below some non-blocking COMMENT points (but replies =
would be appreciated even if only for my own education), and some nits.

    I hope that this helps to improve the document,

    Regards,

    -=C3=A9ric

    =3D=3D COMMENTS =3D=3D

    Generic comment about the use of the word "file" (which means an =
object in a file system for me) rather than something more generic (no =
suggestion to offer
    though) ?
    BALAZS: In most cases we do actually mean an object in a file =
system.=20
    In some cases not: In UC6 Allowing YANG instance data to be carried =
within  other IPC message formats.=20
    This is the exact reason while we differentiate between an =
instance-data-set and an instance-data-file.=20
    An instance-data-set may be contained in a file, but may be =
transferred in a protocol message.

EV> indeed, so, should the title be updated s/file/data set/ ?
BALAZS2: I am reluctant to change the title this late in the process. =
Although your suggestion is reasonable, people might more easily =
recognize what an instance-data-file is than an what an =
instance-data-set means.

    -- Section 1 --
    The first 2 sentences are quite repetitive.
    BALAZS: The first sentence states that we need such data off-lie
    The second sentence states that this offline data may be needed in 3 =
different phases design, implementation or even later after the server =
and the YANG module is up and running, I just don't have access to it.
    Reworded to clarify this.

EV> thanks

    Is it about "offline delivery" or "exchange" ? At this point of =
reading the document, it is still unclear in my mind what it is about... =
The rest of the I-D made it clear.
    BALAZS: The draft is only about defining a format for YANG instance =
data.=20
    Naturally once you have a data format it could be used both to =
deliver the information offline in a file or to exchange information =
using the format in an protocol message.
    Most use-cases mentioned are about Offline delivery.
    .

    Unclear which UC is either implemented or potential (even with the =
appendix); could also add forward references to the appendix UC). Should =
the
    implementation(s) be referenced if they are public ?
    BALAZS:  As stated in section 1. Use cases are listed only as =
examples. This draft is only about defining a format for YANG Instance =
Data.
    I know UC1,2,3 are already implemented by more than one company, but =
as this draft is only about the format, I don't think we should =
reference the implementations.=20
    Also, UC1 is already utilized in 2 other internet drafts.

EV> nice to know, next time, you may want to have an 'implementation =
status' section (to be removed by the RFC editor).

    -- Section 1.1 --
    Unsure why a "data set" should be named? The choice of words does =
not seem the best fit (even though if I have no suggestions).
    BALAZS: Specific data sets need to be identified. What is it about? =
When was it prepared?=20
EV> correct but it is also in the meta-data part (if not mistaken)
BALAZS2: Yes the name should be contained both in the filename and in =
the name metadata; so in my eyes that means this is a named dataset.
     I want a way to identify the specific data set. So, we give it a =
name (and a revision/timestamp).  This is why its named.
    Any better suggestion?

    -- Section 2 --
    Like some other ADs, I wonder why "The context data part MUST... =
except" is not a "SHOULD" as there are exceptions.

    What is the expected behaviour when the timestamp in the filename =
does not match the meta data ?
    BALAZS: We are following RFC7950 in which YANG related file names =
are recommended with a SHOULD but not prescribed with a MUST.
    Some people wanted to use separate timestamps when the =
instance-data-set is created and when it is put into an =
instance-data-file.
    This draft does not prescribe an expected behavior of the tools, it =
just defines the format.

    -- Section 2.1 --
    There is a "SHOULD" so when are exceptions/deviations acceptable ?
    BALAZS: Based on your and Murray's comments, this will be changed to =
MUST.

    The description of "simplified" is really too simple ;-)
    BALAZS: Added  "only the module name and revision-date is used "
EV> thanks

    I would also appreciate that the order of the list matches the =
following sub-sections order.
    BALAZS: OK, updated.

    Thank you for using RFC 8792.

    -- Section 4 --
    Did the authors think about adding the party creating the file and =
adding an optional signature in the file itself?
    BALAZS:  Not specifically. A basic format is defined, but it is =
indicated in section 2, that:
    "Some metadata items are defined in the YANG module =
"ietf-yang-instance-data", but other items MAY be used."

    =3D=3D NITS =3D=3D

    -- Section 1 --
    The first 2 sentences are quite repetitive. Missing "." At the end =
of the 1st =C2=A7
    BALAZS: The first sentence states that we need such data off-lie
    The second sentence states that this offline data may be needed in 3 =
different phases design, implementation or even later after the server =
and the YANG module is up and running, I just don't have access to it.
    Reworded to clarify this.
    Added last full stop.

    Why is "Factory Default Setting" capitalised ?
    BALAZS: OK, I decapitalize it (If there is such a word  :-)  ).

EV> I do not know either ;-)

    -- Section 1.2 --
    Why using the future tense "shall be" rather than "are" ?
    BALAZS: The principles are not facts that just exists, they are =
rather goals we fulfill by defining this format. . I though "shall" =
would be the correct   term.

    -- Section 2.1.1 and others --
    Suggest to warn the reader that the examples are further in the text =
in a different section.
    BALAZS: OK, will add it.

    -- Section 6 --
    A "," is missing.
    BALAZS: OK, will correct it



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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: =?utf-8?B?QmFsw6F6cyBMZW5neWVs?= <balazs.lengyel=40ericsson.com@dmarc.ietf.org>, The IESG <iesg@ietf.org>, Benoit Claise <benoit.claise@huawei.com>
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Date: Wed, 6 Oct 2021 09:26:16 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/LCQDYoqAnc7Nx4ujjBTtg4PbEKA>
Subject: Re: [netmod] Roman Danyliw's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Hello Roman,
Thank you for the thorough review. I used your comments to improve the =
draft. See my detailed answers below as BALAZS:
Regards Balazs

-----Original Message-----
From: Roman Danyliw via Datatracker <noreply@ietf.org>=20
Sent: 2021. okt=C3=B3ber 5., kedd 22:45
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-netmod-yang-instance-file-format@ietf.org; =
netmod-chairs@ietf.org; netmod@ietf.org; Kent Watsen =
<kent+ietf@watsen.net>; kent+ietf@watsen.net
Subject: Roman Danyliw's No Objection on =
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

Roman Danyliw has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

When responding, please keep the subject line intact and reply to all =
email addresses included in the To and CC lines. (Feel free to cut this =
introductory paragraph, however.)


Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

** Section 2.
instance-data-set-name ['@' ( revision-date / timestamp ) ]
                     ( '.xml' / '.json' )

A syntax for an instance data file name is specified with normative =
language.=20
However, this format is not explained is cited.
BALAZS: The syntax is ABNF. It will be stated and referenced.

** Section 2. Editorial.
OLD
If the leaf "name" is present in the instance data header, its value
   SHOULD be used for the "instance-data-set-name"

NEW
If the leaf "name" is present in the instance data header, its value
   SHOULD be used for the "instance-data-set-name" in the filename.
BALAZS: OK, will be updated.

** Section 2.

Description of the instance data set.  The description SHOULD
         contain information whether and how the data can change during
         the lifetime of the server

I found this definition of the description confusing as Figure 1 =
=E2=80=93 3 don=E2=80=99t seem to describe =E2=80=9Cwhether and how the =
data=E2=80=9D will change.
BALAZS: Good catch. The information will be added to the examples.

** Section 2.1.1.  Per =E2=80=9CThe inline-yang-library anydata data =
node carries instance data (conforming to =
ietf-yang-library@2019-01-04)=E2=80=9D, please provide a reference to =
=E2=80=9Cietf-yang-library@2019-01-04=E2=80=9D.
BALAZS: OK,  will be updated.

** Section 4.  Please note the risk of using same-schema-as-file, =
especially if these configs are not integrity protected or received from =
outside sources.=20
Per https://, there are the risks of loading remote content.  Section 7 =
of
RFC3986 is a good reference.  Per file://, there are things list =
directory traversal.
BALAZS: OK, will be added to security considerations.

** Section 4.  Per =E2=80=9CThe header part is not security sensitive =
with one possible exception =E2=80=A6 the URI method=E2=80=9D, =
I=E2=80=99m not sure that such a strong statement can be made given the =
lack of application context.  For example, the description leaf in the =
header could include sensitive information, say =E2=80=98Latest test =
router config for new super secret Aqua-Violet flying car =
project=E2=80=99.  This text needs to either have a caution that that =
this header is "unprotected so do not put in sensitive information =
unless this file is protected", or clarify that more in the header than =
the URI could be sensitive.
BALAZS: OK,  will be updated.

** Section 4.  Thanks for the language trying to create equivalency =
between the protections of the file and the YANG store that would house =
it on a live system.  Recommend making this text clear to say this =
applies to both at rest and in motion data.

OLD
The same kind of handling should be applied, that would be
   needed for the result of a read operation returning the same data.

NEW (roughly)
The same kind of handling should be applied to this file at rest and in =
transit that would be needed for the result of a read operation =
returning the same data.  These in-transit protection mechanisms will =
also mitigate integrity issues when transporting the file.
BALAZS: OK,  will be updated.

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Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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=EF=BB=BFOn 2021-10-06, 10:53, "Bal=C3=A1zs Lengyel" <balazs.lengyel@ericsson.com> wr=
ote:

    Hello Zaheduzzaman,
    Thank you for the review.=20
    See detailed replies as "BALAZS:" below.
    Regards Balazs

    -----Original Message-----
    From: netmod <netmod-bounces@ietf.org> On Behalf Of Zaheduzzaman Sarker=
 via
    Datatracker
    Sent: 2021. okt=C3=B3ber 6., szerda 8:02
    To: The IESG <iesg@ietf.org>
    Cc: netmod-chairs@ietf.org;
    draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
    Subject: [netmod] Zaheduzzaman Sarker's No Objection on
    draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

    Zaheduzzaman Sarker has entered the following ballot position for
    draft-ietf-netmod-yang-instance-file-format-20: No Objection

    When responding, please keep the subject line intact and reply to all e=
mail
    addresses included in the To and CC lines. (Feel free to cut this
    introductory paragraph, however.)


    Please refer to https://www.ietf.org/blog/handling-iesg-ballot-position=
s/
    for more information about how to handle DISCUSS and COMMENT positions.


    The document, along with other ballot positions, can be found here:
    https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-f=
ormat
    /



    ----------------------------------------------------------------------
    COMMENT:
    ----------------------------------------------------------------------

    Thanks for the efforts on this document.

    I have following comments, by addressing them I believe will improve th=
e
    document quality

    - Section 2.1 : Should it not say if the "content-schema" node exists t=
hen
    one of the methods MUST be used? as I see the specification of content
    schema is a SHOULD, hence may not be included for whatever reason.
    BALAZS: In accordance with your comment the SHOULD will be changed to M=
UST.
    However, that still allows " External Method: Do not include the
    "content-schema" node;"
    People stated that when instance files are used repeatedly (a new file
    generated every few seconds) in a closed, well defined environment,  th=
e
    content-schema may already be known. In this case it is not necessary t=
o
    include it in the file.

I don't think we are on the same page here. I am basically saying in the co=
ntext of this specification's section 2, the addition of content-schema is a=
 SHOULD, hence one implementation can actually skip it. But then in 2.1, as =
the text describes the assumption seems to be the content-schema is always p=
resent (like a MUST). I am not asking to change the SHOULD to MUST in sectio=
n 2, but to acknowledge the fact that section 2.1 is only applicable when th=
ere is "content-schema".

    - Section 4 : it says

        Instance data files may contain sensitive data.

      OK, but what should be taken into consideration when putting the sens=
itive
      data in the data file. It feels like there should be more information
      provided to the user of the specification for actually materialize th=
e
      statement made here.
    BALAZS: Instance data files may be used in many different use-cases.=20
    Whether the data within is sensitive is completely dependent on the con=
tent
    schema applicable to the use-case.
    The draft contains:
    " The security sensitivity of the instance data in the content part is
       completely dependent on the content schema."
    Any suggestions about what else we could say?

In that case, if you think there is enough explanations, I will suggest to =
simply drop then one line (--Instance data files may contain sensitive data.=
) or make the one line part of the text you are referring to.

BR

Zahed



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From: =?utf-8?B?QmFsw6F6cyBMZW5neWVs?= <balazs.lengyel@ericsson.com>
To: Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com>, The IESG <iesg@ietf.org>
CC: "netmod-chairs@ietf.org" <netmod-chairs@ietf.org>, "draft-ietf-netmod-yang-instance-file-format@ietf.org" <draft-ietf-netmod-yang-instance-file-format@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/v0AJ2XF3uTpamg_TPTGHirg3PHw>
Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Hello Zahed,=20
Please see answers below as BALAZS2.
Regards Balazs

-----Original Message-----
From: Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com>=20
Sent: 2021. okt=C3=B3ber 6., szerda 16:00
To: Bal=C3=A1zs Lengyel <balazs.lengyel@ericsson.com>; The IESG =
<iesg@ietf.org>
Cc: netmod-chairs@ietf.org; =
draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on =
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)



=EF=BB=BFOn 2021-10-06, 10:53, "Bal=C3=A1zs Lengyel" =
<balazs.lengyel@ericsson.com> wrote:

    Hello Zaheduzzaman,
    Thank you for the review.=20
    See detailed replies as "BALAZS:" below.
    Regards Balazs

    -----Original Message-----
    From: netmod <netmod-bounces@ietf.org> On Behalf Of Zaheduzzaman =
Sarker via
    Datatracker
    Sent: 2021. okt=C3=B3ber 6., szerda 8:02
    To: The IESG <iesg@ietf.org>
    Cc: netmod-chairs@ietf.org;
    draft-ietf-netmod-yang-instance-file-format@ietf.org; =
netmod@ietf.org
    Subject: [netmod] Zaheduzzaman Sarker's No Objection on
    draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

    Zaheduzzaman Sarker has entered the following ballot position for
    draft-ietf-netmod-yang-instance-file-format-20: No Objection

    When responding, please keep the subject line intact and reply to =
all email
    addresses included in the To and CC lines. (Feel free to cut this
    introductory paragraph, however.)


    Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
    for more information about how to handle DISCUSS and COMMENT =
positions.


    The document, along with other ballot positions, can be found here:
    =
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat
    /



    =
----------------------------------------------------------------------
    COMMENT:
    =
----------------------------------------------------------------------

    Thanks for the efforts on this document.

    I have following comments, by addressing them I believe will improve =
the
    document quality

    - Section 2.1 : Should it not say if the "content-schema" node =
exists then
    one of the methods MUST be used? as I see the specification of =
content
    schema is a SHOULD, hence may not be included for whatever reason.
    BALAZS: In accordance with your comment the SHOULD will be changed =
to MUST.
    However, that still allows " External Method: Do not include the
    "content-schema" node;"
    People stated that when instance files are used repeatedly (a new =
file
    generated every few seconds) in a closed, well defined environment,  =
the
    content-schema may already be known. In this case it is not =
necessary to
    include it in the file.

I don't think we are on the same page here. I am basically saying in the =
context of this specification's section 2, the addition of =
content-schema is a SHOULD, hence one implementation can actually skip =
it. But then in 2.1, as the text describes the assumption seems to be =
the content-schema is always present (like a MUST). I am not asking to =
change the SHOULD to MUST in section 2, but to acknowledge the fact that =
section 2.1 is only applicable when there is "content-schema".
BALAZS2:  I see your point. I am trying to find the correct =
wording/documentation for it.
 Today Section 2.1 in -20 includes:
One of the following methods MUST be used:
     Inline method: ...
      Simplified-Inline method: ....
      URI method: ...

      External Method: Do not include the "content-schema" node; the
      user needs to obtain the information through external documents.

My idea was that the External method indicates that the content-schema =
might NOT be present in the instance-date-set.

If you think that's not clear, I could reword it to:=20


  To properly understand and use an instance data set, the user needs
   to know the content-schema.  The content schema can be either=20
  specified in external documents or within the instance data set.=20
  In the latter case one of the following methods MUST be used:

      Inline method: Include the needed information as part of the
      instance data set.

      Simplified-Inline method: Include the needed information as part
      of the instance data set; short specification, only the module
      name and revision-date is used.

      URI method: Include a URI that references another YANG instance
      data file.  This instance data file will use the same content-
      schema as the referenced YANG instance data file.  (if you don't
      want to repeat the info again and again)

Please decide which is better!
-------------------------------------------------------------------------=
----------------------

    - Section 4 : it says

        Instance data files may contain sensitive data.

      OK, but what should be taken into consideration when putting the =
sensitive
      data in the data file. It feels like there should be more =
information
      provided to the user of the specification for actually materialize =
the
      statement made here.
    BALAZS: Instance data files may be used in many different use-cases. =

    Whether the data within is sensitive is completely dependent on the =
content
    schema applicable to the use-case.
    The draft contains:
    " The security sensitivity of the instance data in the content part =
is
       completely dependent on the content schema."
    Any suggestions about what else we could say?

In that case, if you think there is enough explanations, I will suggest =
to simply drop then one line (--Instance data files may contain =
sensitive data.) or make the one line part of the text you are referring =
to.
BALAZS2: OK, I will merge it into the paragraph referenced.

BR

Zahed



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From: Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com>
To: =?utf-8?B?QmFsw6F6cyBMZW5neWVs?= <balazs.lengyel@ericsson.com>, The IESG <iesg@ietf.org>
CC: "netmod-chairs@ietf.org" <netmod-chairs@ietf.org>, "draft-ietf-netmod-yang-instance-file-format@ietf.org" <draft-ietf-netmod-yang-instance-file-format@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/3wG2u8JNlm2BCo5_sS5noBU-FcY>
Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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--B_3716386955_477480111
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=EF=BB=BFOn 2021-10-06, 17:32, "Bal=C3=A1zs Lengyel" <balazs.lengyel@ericsson.com> wr=
ote:

    Hello Zahed,=20
    Please see answers below as BALAZS2.
    Regards Balazs

    -----Original Message-----
    From: Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com>=20
    Sent: 2021. okt=C3=B3ber 6., szerda 16:00
    To: Bal=C3=A1zs Lengyel <balazs.lengyel@ericsson.com>; The IESG <iesg@ietf.=
org>
    Cc: netmod-chairs@ietf.org; draft-ietf-netmod-yang-instance-file-format=
@ietf.org; netmod@ietf.org
    Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-=
netmod-yang-instance-file-format-20: (with COMMENT)



    =EF=BB=BFOn 2021-10-06, 10:53, "Bal=C3=A1zs Lengyel" <balazs.lengyel@ericsson.com=
> wrote:

        Hello Zaheduzzaman,
        Thank you for the review.=20
        See detailed replies as "BALAZS:" below.
        Regards Balazs

        -----Original Message-----
        From: netmod <netmod-bounces@ietf.org> On Behalf Of Zaheduzzaman Sa=
rker via
        Datatracker
        Sent: 2021. okt=C3=B3ber 6., szerda 8:02
        To: The IESG <iesg@ietf.org>
        Cc: netmod-chairs@ietf.org;
        draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.o=
rg
        Subject: [netmod] Zaheduzzaman Sarker's No Objection on
        draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

        Zaheduzzaman Sarker has entered the following ballot position for
        draft-ietf-netmod-yang-instance-file-format-20: No Objection

        When responding, please keep the subject line intact and reply to a=
ll email
        addresses included in the To and CC lines. (Feel free to cut this
        introductory paragraph, however.)


        Please refer to https://www.ietf.org/blog/handling-iesg-ballot-posi=
tions/
        for more information about how to handle DISCUSS and COMMENT positi=
ons.


        The document, along with other ballot positions, can be found here:
        https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-fi=
le-format
        /



        -------------------------------------------------------------------=
---
        COMMENT:
        -------------------------------------------------------------------=
---

        Thanks for the efforts on this document.

        I have following comments, by addressing them I believe will improv=
e the
        document quality

        - Section 2.1 : Should it not say if the "content-schema" node exis=
ts then
        one of the methods MUST be used? as I see the specification of cont=
ent
        schema is a SHOULD, hence may not be included for whatever reason.
        BALAZS: In accordance with your comment the SHOULD will be changed =
to MUST.
        However, that still allows " External Method: Do not include the
        "content-schema" node;"
        People stated that when instance files are used repeatedly (a new f=
ile
        generated every few seconds) in a closed, well defined environment,=
  the
        content-schema may already be known. In this case it is not necessa=
ry to
        include it in the file.

    I don't think we are on the same page here. I am basically saying in th=
e context of this specification's section 2, the addition of content-schema =
is a SHOULD, hence one implementation can actually skip it. But then in 2.1,=
 as the text describes the assumption seems to be the content-schema is alwa=
ys present (like a MUST). I am not asking to change the SHOULD to MUST in se=
ction 2, but to acknowledge the fact that section 2.1 is only applicable whe=
n there is "content-schema".
    BALAZS2:  I see your point. I am trying to find the correct wording/doc=
umentation for it.
     Today Section 2.1 in -20 includes:
    One of the following methods MUST be used:
         Inline method: ...
          Simplified-Inline method: ....
          URI method: ...

          External Method: Do not include the "content-schema" node; the
          user needs to obtain the information through external documents.

    My idea was that the External method indicates that the content-schema =
might NOT be present in the instance-date-set.

    If you think that's not clear, I could reword it to:=20


      To properly understand and use an instance data set, the user needs
       to know the content-schema.  The content schema can be either=20
      specified in external documents or within the instance data set.=20
      In the latter case one of the following methods MUST be used:

          Inline method: Include the needed information as part of the
          instance data set.

          Simplified-Inline method: Include the needed information as part
          of the instance data set; short specification, only the module
          name and revision-date is used.

          URI method: Include a URI that references another YANG instance
          data file.  This instance data file will use the same content-
          schema as the referenced YANG instance data file.  (if you don't
          want to repeat the info again and again)

    Please decide which is better!

The new version is much better to express the intention you have. Thanks fo=
r the updates and addressing my comment.

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

        - Section 4 : it says

            Instance data files may contain sensitive data.

          OK, but what should be taken into consideration when putting the =
sensitive
          data in the data file. It feels like there should be more informa=
tion
          provided to the user of the specification for actually materializ=
e the
          statement made here.
        BALAZS: Instance data files may be used in many different use-cases=
.=20
        Whether the data within is sensitive is completely dependent on the=
 content
        schema applicable to the use-case.
        The draft contains:
        " The security sensitivity of the instance data in the content part=
 is
           completely dependent on the content schema."
        Any suggestions about what else we could say?

    In that case, if you think there is enough explanations, I will suggest=
 to simply drop then one line (--Instance data files may contain sensitive d=
ata.) or make the one line part of the text you are referring to.
    BALAZS2: OK, I will merge it into the paragraph referenced.

Thanks.

BR
Zahed



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To: Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com>, The IESG <iesg@ietf.org>
CC: "netmod-chairs@ietf.org" <netmod-chairs@ietf.org>, "draft-ietf-netmod-yang-instance-file-format@ietf.org" <draft-ietf-netmod-yang-instance-file-format@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
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Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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------=_NextPart_000_03E2_01D7BADA.3151CBC0
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Hello Zahed,
Thanks for the comments. I will update with the new text.
Regards Balazs

-----Original Message-----
From: Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com>=20
Sent: 2021. okt=C3=B3ber 6., szerda 17:43
To: Bal=C3=A1zs Lengyel <balazs.lengyel@ericsson.com>; The IESG =
<iesg@ietf.org>
Cc: netmod-chairs@ietf.org; =
draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on =
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)



=EF=BB=BFOn 2021-10-06, 17:32, "Bal=C3=A1zs Lengyel" =
<balazs.lengyel@ericsson.com> wrote:

    Hello Zahed,=20
    Please see answers below as BALAZS2.
    Regards Balazs

    -----Original Message-----
    From: Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com>=20
    Sent: 2021. okt=C3=B3ber 6., szerda 16:00
    To: Bal=C3=A1zs Lengyel <balazs.lengyel@ericsson.com>; The IESG =
<iesg@ietf.org>
    Cc: netmod-chairs@ietf.org; =
draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
    Subject: Re: [netmod] Zaheduzzaman Sarker's No Objection on =
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)



    =EF=BB=BFOn 2021-10-06, 10:53, "Bal=C3=A1zs Lengyel" =
<balazs.lengyel@ericsson.com> wrote:

        Hello Zaheduzzaman,
        Thank you for the review.=20
        See detailed replies as "BALAZS:" below.
        Regards Balazs

        -----Original Message-----
        From: netmod <netmod-bounces@ietf.org> On Behalf Of Zaheduzzaman =
Sarker via
        Datatracker
        Sent: 2021. okt=C3=B3ber 6., szerda 8:02
        To: The IESG <iesg@ietf.org>
        Cc: netmod-chairs@ietf.org;
        draft-ietf-netmod-yang-instance-file-format@ietf.org; =
netmod@ietf.org
        Subject: [netmod] Zaheduzzaman Sarker's No Objection on
        draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

        Zaheduzzaman Sarker has entered the following ballot position =
for
        draft-ietf-netmod-yang-instance-file-format-20: No Objection

        When responding, please keep the subject line intact and reply =
to all email
        addresses included in the To and CC lines. (Feel free to cut =
this
        introductory paragraph, however.)


        Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
        for more information about how to handle DISCUSS and COMMENT =
positions.


        The document, along with other ballot positions, can be found =
here:
        =
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat
        /



        =
----------------------------------------------------------------------
        COMMENT:
        =
----------------------------------------------------------------------

        Thanks for the efforts on this document.

        I have following comments, by addressing them I believe will =
improve the
        document quality

        - Section 2.1 : Should it not say if the "content-schema" node =
exists then
        one of the methods MUST be used? as I see the specification of =
content
        schema is a SHOULD, hence may not be included for whatever =
reason.
        BALAZS: In accordance with your comment the SHOULD will be =
changed to MUST.
        However, that still allows " External Method: Do not include the
        "content-schema" node;"
        People stated that when instance files are used repeatedly (a =
new file
        generated every few seconds) in a closed, well defined =
environment,  the
        content-schema may already be known. In this case it is not =
necessary to
        include it in the file.

    I don't think we are on the same page here. I am basically saying in =
the context of this specification's section 2, the addition of =
content-schema is a SHOULD, hence one implementation can actually skip =
it. But then in 2.1, as the text describes the assumption seems to be =
the content-schema is always present (like a MUST). I am not asking to =
change the SHOULD to MUST in section 2, but to acknowledge the fact that =
section 2.1 is only applicable when there is "content-schema".
    BALAZS2:  I see your point. I am trying to find the correct =
wording/documentation for it.
     Today Section 2.1 in -20 includes:
    One of the following methods MUST be used:
         Inline method: ...
          Simplified-Inline method: ....
          URI method: ...

          External Method: Do not include the "content-schema" node; the
          user needs to obtain the information through external =
documents.

    My idea was that the External method indicates that the =
content-schema might NOT be present in the instance-date-set.

    If you think that's not clear, I could reword it to:=20


      To properly understand and use an instance data set, the user =
needs
       to know the content-schema.  The content schema can be either=20
      specified in external documents or within the instance data set.=20
      In the latter case one of the following methods MUST be used:

          Inline method: Include the needed information as part of the
          instance data set.

          Simplified-Inline method: Include the needed information as =
part
          of the instance data set; short specification, only the module
          name and revision-date is used.

          URI method: Include a URI that references another YANG =
instance
          data file.  This instance data file will use the same content-
          schema as the referenced YANG instance data file.  (if you =
don't
          want to repeat the info again and again)

    Please decide which is better!

The new version is much better to express the intention you have. Thanks =
for the updates and addressing my comment.

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

        - Section 4 : it says

            Instance data files may contain sensitive data.

          OK, but what should be taken into consideration when putting =
the sensitive
          data in the data file. It feels like there should be more =
information
          provided to the user of the specification for actually =
materialize the
          statement made here.
        BALAZS: Instance data files may be used in many different =
use-cases.=20
        Whether the data within is sensitive is completely dependent on =
the content
        schema applicable to the use-case.
        The draft contains:
        " The security sensitivity of the instance data in the content =
part is
           completely dependent on the content schema."
        Any suggestions about what else we could say?

    In that case, if you think there is enough explanations, I will =
suggest to simply drop then one line (--Instance data files may contain =
sensitive data.) or make the one line part of the text you are referring =
to.
    BALAZS2: OK, I will merge it into the paragraph referenced.

Thanks.

BR
Zahed



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Subject: [netmod] Benjamin Kaduk's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Benjamin Kaduk has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

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introductory paragraph, however.)


Please refer to https://www.ietf.org/blog/handling-iesg-ballot-positions/
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Should we register media-types for the file formats being specified?

Section 2

   Two formats are specified based on the XML and JSON YANG encodings.
   Later, as other YANG encodings (e.g., CBOR) are defined, further
   instance data formats may be specified.

I don't remember seeing a clear description of the specifics of these
two specified formats.  (I assume it's just "use the XML/JSON encoding
for YANG structures", but I don't remember that stated anywhere.)

   The name of the instance data file SHOULD be of the form:

      instance-data-set-name ['@' ( revision-date / timestamp ) ]
                     ( '.xml' / '.json' )

This looks (almost?  Not sure about '@' vs. "@".) like valid ABNF.  Do
we want to say that and reference RFC 5234 for the interpretation of the
symbols?

   If the leaf "name" is present in the instance data header, its value
   SHOULD be used for the "instance-data-set-name".  If the "revision-
   date" is present in the filename it MUST conform to the format of the
   revision-date leaf in the YANG model.  [...]

This seems unenforcable, and contrary to the Unix ethos.  Why is it
necessary to try to have consistency betwen the contents of the file and
its name in the file system, as opposed to letting the type and contents
of a file speak for itself regardless of the name in the file system?

   Metadata, information about the data set itself SHOULD be included in
   the instance data set.  Some metadata items are defined in the YANG
   module "ietf-yang-instance-data", but other items MAY be used.

   Metadata MUST include:

      -  Version of the YANG Instance Data format

Doesn't the latter (MUST) effectively make the former (SHOULD) also into
a "MUST"?

Also, if this is actually mandatory, shouldn't that be reflected in the
YANG module?

Section 2.1.2

   import-only dependencies MAY be excluded from the leaf-list.  If they
   are excluded then the consumer of the instance data set has to apply
   the YANG language rules to resolve the imports.  An example of the

Do we want to say something like "Accordingly, recipients of the
instance data set must be prepared to perform this processing, absent
prior knowledge about the files they will be processing"?

Section 2.2.1

    <contact>info@acme.com</contact>

Unfortunately, acme.com is a real domain name; we should probably use a
BCP 32 name.  Likewise for urn:rdns:acme.com:oammodel:acme-system-ext,
etc.

Section 2.2.2

     <nacm xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-acm">
       <enable-nacm>true</enable-nacm>
       <read-default>deny</read-default>
       <exec-default>deny</exec-default>

Is there a <write-default> that should be set as well?  Or do we just
implicitly rely on the default from RFC 8341?

Section 3

         description
           "An arbitrary name for the YANG instance data set.  This
            value is primarily used for descriptive purposes.  However,
            when the instance data set is saved to a file, then the
            filename MUST encode the name's value, per Section 3
            of RFC XXXX.";

I think this requirement is currently stated in Section 2, not 3 (though
in my previous comment I suggest that the requirement should be
removed).

Section 4

(I wrote, then deleted as duplicate, essentially all of the same things
that Roman commented on.  Thanks for updating in response to his
comments.)

   The document does not specify any method to influence the behavior of
   a server.

A few of the listed use cases seem to involve loading configuration into
a server, which could perhaps be considered to influence the behavior of
the server in question.

   The header part is not security sensitive with one possible
   exception.  If the URI method is used for specification of the
   content schema and the URI includes a username and/or a password, the
   instance data file needs to be handled securely as mentioned below.

In the terminology of RFC 3986 this is the "userinfo subcomponent", as
in "the URI includes a userinfo subcomponent".

NITS

Section 2.2.1, 2.2.2

It's a bit challenging to get the <revision> of the file to be much
older than the <revision> of the YANG modules it uses.




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Subject: Re: [netmod] Benjamin Kaduk's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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On 7. Oct 2021, at 06:54, Benjamin Kaduk via Datatracker =
<noreply@ietf.org> wrote:
>=20
> instance-data-set-name ['@' ( revision-date / timestamp ) ]
>                     ( '.xml' / '.json' )
>=20
> This looks (almost?  Not sure about '@' vs. "@".) like valid ABNF.  Do
> we want to say that and reference RFC 5234 for the interpretation of =
the
> symbols?

JFYI, single quotes are not used in ABNF.

'.xml' / '.json=E2=80=99

=E2=80=A6would need to be:

%s=E2=80=9D.xml=E2=80=9D / %s=E2=80=9D.json=E2=80=9D

=E2=80=A6as per RFC 7405 to avoid accidentally allowing .XMl and .jsOn.

(Please excuse the smartquotes.)

Gr=C3=BC=C3=9Fe, Carsten


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Subject: Re: [netmod] Benjamin Kaduk's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Thanks, I will change it to double quotes.
Regards Balazs

-----Original Message-----
From: Carsten Bormann <cabo@tzi.org>=20
Sent: 2021. okt=C3=B3ber 7., cs=C3=BCt=C3=B6rt=C3=B6k 7:37
To: Benjamin Kaduk <kaduk@mit.edu>
Cc: The IESG <iesg@ietf.org>; netmod-chairs@ietf.org; =
draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
Subject: Re: [netmod] Benjamin Kaduk's No Objection on =
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

On 7. Oct 2021, at 06:54, Benjamin Kaduk via Datatracker =
<noreply@ietf.org> wrote:
>=20
> instance-data-set-name ['@' ( revision-date / timestamp ) ]
>                     ( '.xml' / '.json' )
>=20
> This looks (almost?  Not sure about '@' vs. "@".) like valid ABNF.  Do =

> we want to say that and reference RFC 5234 for the interpretation of=20
> the symbols?

JFYI, single quotes are not used in ABNF.

'.xml' / '.json=E2=80=99

=E2=80=A6would need to be:

%s=E2=80=9D.xml=E2=80=9D / %s=E2=80=9D.json=E2=80=9D

=E2=80=A6as per RFC 7405 to avoid accidentally allowing .XMl and .jsOn.

(Please excuse the smartquotes.)

Gr=C3=BC=C3=9Fe, Carsten

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To: Benjamin Kaduk <kaduk@mit.edu>, The IESG <iesg@ietf.org>, Benoit Claise <benoit.claise@huawei.com>
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Subject: Re: [netmod] Benjamin Kaduk's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Hello Benjamin,
Thank you for the thorough review. I used your comments to improve the =
draft. See my detailed answers below as BALAZS:
Regards Balazs

-----Original Message-----
From: Benjamin Kaduk via Datatracker <noreply@ietf.org>=20
Sent: 2021. okt=C3=B3ber 7., cs=C3=BCt=C3=B6rt=C3=B6k 6:55
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-netmod-yang-instance-file-format@ietf.org; =
netmod-chairs@ietf.org; netmod@ietf.org; Kent Watsen =
<kent+ietf@watsen.net>; kent+ietf@watsen.net
Subject: Benjamin Kaduk's No Objection on =
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

Benjamin Kaduk has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

When responding, please keep the subject line intact and reply to all =
email addresses included in the To and CC lines. (Feel free to cut this =
introductory paragraph, however.)


Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Should we register media-types for the file formats being specified?

Section 2

   Two formats are specified based on the XML and JSON YANG encodings.
   Later, as other YANG encodings (e.g., CBOR) are defined, further
   instance data formats may be specified.

I don't remember seeing a clear description of the specifics of these =
two specified formats.  (I assume it's just "use the XML/JSON encoding =
for YANG structures", but I don't remember that stated anywhere.)
BALAZS: I added references to the relevant RFCs (7950, 7951, 8791) As =
the model starts with a YAN structure, I included YANG Data Structure =
Extensions RFC8791 too.

   The name of the instance data file SHOULD be of the form:

      instance-data-set-name ['@' ( revision-date / timestamp ) ]
                     ( '.xml' / '.json' )

This looks (almost?  Not sure about '@' vs. "@".) like valid ABNF.  Do =
we want to say that and reference RFC 5234 for the interpretation of the =
symbols?
BALAZS: reference to ABNF added. Changed to double quotes.

   If the leaf "name" is present in the instance data header, its value
   SHOULD be used for the "instance-data-set-name".  If the "revision-
   date" is present in the filename it MUST conform to the format of the
   revision-date leaf in the YANG model.  [...]

This seems unenforcable, and contrary to the Unix ethos.  Why is it =
necessary to try to have consistency betwen the contents of the file and =
its name in the file system, as opposed to letting the type and contents =
of a file speak for itself regardless of the name in the file system?
BALAZS: We use the convention of RFC7950: to use the name of the top =
YANG construct=20
in the filename (there the module name here the structure name).=20
In practice this convention proved very useful. (There already exist =
some implementations of the YANG instance data).
A similar rule for YANG modules is enforced by many tools e.g., pyang =
and confdc.

   Metadata, information about the data set itself SHOULD be included in
   the instance data set.  Some metadata items are defined in the YANG
   module "ietf-yang-instance-data", but other items MAY be used.

   Metadata MUST include:

      -  Version of the YANG Instance Data format

Doesn't the latter (MUST) effectively make the former (SHOULD) also into =
a "MUST"?
BALAZS: Yes, I will change it to MUST. The format-version is a MUST =
either as a default value=20
(not actually present according to YANG rules) or as an explicitly =
specified value.=20
The other metadata items are only recommended (SHOULD).

Also, if this is actually mandatory, shouldn't that be reflected in the =
YANG module?
BALAZS: IN the YANG module leaf format-version has a default value. That =
means that=20
either the default value or some explicitly set vale is always usable =
for the user of the file.=20
Added text to clarify this.

Section 2.1.2

   import-only dependencies MAY be excluded from the leaf-list.  If they
   are excluded then the consumer of the instance data set has to apply
   the YANG language rules to resolve the imports.  An example of the

Do we want to say something like "Accordingly, recipients of the =
instance data set must be prepared to perform this processing, absent =
prior knowledge about the files they will be processing"?
BALAZS: According to YANG rules the "implemented" module that is =
specified in the content schema MAY have used an=20
  Import-by-revision statement in which case the revision date of the =
imported module is fixed/specified in that YANG module.
If import-by-revision was not used, any revision of the imported module =
is usable, which in practice for most tools means the
   latest available revision.=20
IMHO which revision of an imported module to use should be and is =
covered by RFC7950.

Section 2.2.1

    <contact>info@acme.com</contact>

Unfortunately, acme.com is a real domain name; we should probably use a =
BCP 32 name.  Likewise for urn:rdns:acme.com:oammodel:acme-system-ext,
etc.
BALAZS: OK, I will change references to acme.example.com.com as =
according to BCP 32 example.com is reserved.

Section 2.2.2

     <nacm xmlns=3D"urn:ietf:params:xml:ns:yang:ietf-netconf-acm">
       <enable-nacm>true</enable-nacm>
       <read-default>deny</read-default>
       <exec-default>deny</exec-default>

Is there a <write-default> that should be set as well?  Or do we just =
implicitly rely on the default from RFC 8341?
BALAZS: The latter. As defined in RFC8341 write-default's default is =
deny, so it is strict enough.

Section 3

         description
           "An arbitrary name for the YANG instance data set.  This
            value is primarily used for descriptive purposes.  However,
            when the instance data set is saved to a file, then the
            filename MUST encode the name's value, per Section 3
            of RFC XXXX.";

I think this requirement is currently stated in Section 2, not 3 (though =
in my previous comment I suggest that the requirement should be =
removed).
BALAZS: Thanks,  Section number corrected.

Section 4

(I wrote, then deleted as duplicate, essentially all of the same things =
that Roman commented on.  Thanks for updating in response to his
comments.)

   The document does not specify any method to influence the behavior of
   a server.

A few of the listed use cases seem to involve loading configuration into =
a server, which could perhaps be considered to influence the behavior of =
the server in question.
BALAZS: Yes, but the document only defines the data format. Section 1 =
states:
" specifying how and when to use YANG instance data is out of
   scope for this document.  It is anticipated that other documents will
   define specific use cases.  Use cases are listed only as examples."

   The header part is not security sensitive with one possible
   exception.  If the URI method is used for specification of the
   content schema and the URI includes a username and/or a password, the
   instance data file needs to be handled securely as mentioned below.
BALAZS: Corrected based on Roman's comment.

In the terminology of RFC 3986 this is the "userinfo subcomponent", as =
in "the URI includes a userinfo subcomponent".
BALAZS: OK, to be updated.

NITS

Section 2.2.1, 2.2.2

It's a bit challenging to get the <revision> of the file to be much =
older than the <revision> of the YANG modules it uses.
BALAZS: It was a bit of a joke to use two historically significant dates
1776-07-04 US declaration of independence
1956-10-23 Hungary, the start of the revolution against communism and =
Russian occupation
I will change them to newer dates.


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Cc: draft-ietf-netmod-yang-instance-file-format@ietf.org, netmod-chairs@ietf.org, netmod@ietf.org, Kent Watsen <kent+ietf@watsen.net>, kent+ietf@watsen.net
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Subject: [netmod] John Scudder's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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John Scudder has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thanks for your work on this spec. Thanks also to Kent Watsen for his hard work
shepherding it.

I have some comments below which I hope may be helpful.

1. Section 1, nit, s/In Appendix C describes/Appendix C describes/ (delete the
"in")

2. Section 1.4:

   A YANG instance data set is created at a specific point of time.  If
   the data changes afterwards, this is not represented in the instance
   data set anymore.  The current values may be retrieved at run-time

I think "anymore" should be cut, for several reasons, the most important of
which is that it seems to be objectively wrong. The cut would be the minimal
fix, but did you mean something more like this? "If the data changes
afterwards, the instance data will no longer represent the current data, unless
it is updated."

3. Section 2, nit, s/constrains MAY be violated/constraints MAY be violated/

4. Section 2.1: I was amazed that the "external method" option, which is
essentially the "simply don't bother" option, was acceptable to the WG and
other reviewers. To my eye, the URI method option seems functionally just as
good (it keeps the content of the file itself small) while providing a stronger
(though still not very strong) assurance that the schema will actually be
available.
   Was "external method" discussed in the WG? Or am I simply in the rough for
even thinking it surprising?

5. Appendix C: I'm inclined to agree with the shepherd's recommendation to
remove this entire section
(https://mailarchive.ietf.org/arch/msg/netmod/5DfEi8swOmLEPykBpFICJK6398s/)
since readability is problematic and it doesn't seem to add to the usability of
the spec. Since it is, as it says, only a non-normative appendix I don't
insist, but I strongly encourage you to consider trimming or rewriting it.




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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/gzqueFRjkvZJ_n40LF_ZnuCAXI0>
Subject: Re: [netmod] John Scudder's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Hello John,
Thank you for the review. I used your comments to improve the draft. See =
my
detailed answers below as BALAZS:
Regards Balazs

-----Original Message-----
From: netmod <netmod-bounces@ietf.org> On Behalf Of John Scudder via
Datatracker
Sent: 2021. okt=F3ber 7., cs=FCt=F6rt=F6k 15:39
To: The IESG <iesg@ietf.org>
Cc: netmod-chairs@ietf.org;
draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod@ietf.org
Subject: [netmod] John Scudder's No Objection on
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

John Scudder has entered the following ballot position for
draft-ietf-netmod-yang-instance-file-format-20: No Objection

When responding, please keep the subject line intact and reply to all =
email
addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to =
https://www.ietf.org/blog/handling-iesg-ballot-positions/
for more information about how to handle DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-for=
mat
/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thanks for your work on this spec. Thanks also to Kent Watsen for his =
hard
work shepherding it.

I have some comments below which I hope may be helpful.

1. Section 1, nit, s/In Appendix C describes/Appendix C describes/ =
(delete
the
"in")
BALAZS: OK, will be updated

2. Section 1.4:

   A YANG instance data set is created at a specific point of time.  If
   the data changes afterwards, this is not represented in the instance
   data set anymore.  The current values may be retrieved at run-time

I think "anymore" should be cut, for several reasons, the most important =
of
which is that it seems to be objectively wrong. The cut would be the =
minimal
fix, but did you mean something more like this? "If the data changes
afterwards, the instance data will no longer represent the current data,
unless it is updated."
BALAZS: OK, will be updated with the additional text.=20

3. Section 2, nit, s/constrains MAY be violated/constraints MAY be =
violated/
BALAZS: OK, will be updated

4. Section 2.1: I was amazed that the "external method" option, which is
essentially the "simply don't bother" option, was acceptable to the WG =
and
other reviewers. To my eye, the URI method option seems functionally =
just as
good (it keeps the content of the file itself small) while providing a
stronger (though still not very strong) assurance that the schema will
actually be available.
   Was "external method" discussed in the WG? Or am I simply in the =
rough
for even thinking it surprising?
BALAZS:  People stated that when instance files are used repeatedly (a =
new
file
        generated every few seconds) in a closed, well defined =
environment,
the
        content-schema may already be known. In this case it is not
necessary to
        include it in the file.

5. Appendix C: I'm inclined to agree with the shepherd's recommendation =
to
remove this entire section
(https://mailarchive.ietf.org/arch/msg/netmod/5DfEi8swOmLEPykBpFICJK6398s=
/)
since readability is problematic and it doesn't seem to add to the =
usability
of the spec. Since it is, as it says, only a non-normative appendix I =
don't
insist, but I strongly encourage you to consider trimming or rewriting =
it.
BALAZS: We will consider it. Some editorial updates, trimming done.


_______________________________________________
netmod mailing list
netmod@ietf.org
https://www.ietf.org/mailman/listinfo/netmod

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From: John Scudder <jgs@juniper.net>
To: =?utf-8?B?QmFsw6F6cyBMZW5neWVs?= <balazs.lengyel@ericsson.com>
CC: The IESG <iesg@ietf.org>, "netmod-chairs@ietf.org" <netmod-chairs@ietf.org>, "draft-ietf-netmod-yang-instance-file-format@ietf.org" <draft-ietf-netmod-yang-instance-file-format@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
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Subject: Re: [netmod] John Scudder's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Date: Thu, 7 Oct 2021 14:44:51 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: =?iso-8859-1?Q?Bal=E1zs?= Lengyel <balazs.lengyel@ericsson.com>
Cc: The IESG <iesg@ietf.org>, Benoit Claise <benoit.claise@huawei.com>, "draft-ietf-netmod-yang-instance-file-format@ietf.org" <draft-ietf-netmod-yang-instance-file-format@ietf.org>,  "netmod-chairs@ietf.org" <netmod-chairs@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>, Kent Watsen <kent+ietf@watsen.net>
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Subject: Re: [netmod] Benjamin Kaduk's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Hi Balzs,

Replies inline as well (where needed)

On Thu, Oct 07, 2021 at 10:43:28AM +0000, Balzs Lengyel wrote:
> Hello Benjamin,
> Thank you for the thorough review. I used your comments to improve the draft. See my detailed answers below as BALAZS:
> Regards Balazs
> 
> -----Original Message-----
> From: Benjamin Kaduk via Datatracker <noreply@ietf.org> 
> Sent: 2021. oktber 7., cstrtk 6:55
> To: The IESG <iesg@ietf.org>
> Cc: draft-ietf-netmod-yang-instance-file-format@ietf.org; netmod-chairs@ietf.org; netmod@ietf.org; Kent Watsen <kent+ietf@watsen.net>; kent+ietf@watsen.net
> Subject: Benjamin Kaduk's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
> 
> Benjamin Kaduk has entered the following ballot position for
> draft-ietf-netmod-yang-instance-file-format-20: No Objection
> 
> When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.)
> 
> 
> Please refer to https://www.ietf.org/blog/handling-iesg-ballot-positions/
> for more information about how to handle DISCUSS and COMMENT positions.
> 
> 
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/
> 
> 
> 
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
> 
> Should we register media-types for the file formats being specified?
> 
> Section 2
> 
>    Two formats are specified based on the XML and JSON YANG encodings.
>    Later, as other YANG encodings (e.g., CBOR) are defined, further
>    instance data formats may be specified.
> 
> I don't remember seeing a clear description of the specifics of these two specified formats.  (I assume it's just "use the XML/JSON encoding for YANG structures", but I don't remember that stated anywhere.)
> BALAZS: I added references to the relevant RFCs (7950, 7951, 8791) As the model starts with a YAN structure, I included YANG Data Structure Extensions RFC8791 too.

I was hoping for a statement like "The file formats are achieved by
applying the respective XML and JSON encoding rules for the YANG structure
included in this document."

>    The name of the instance data file SHOULD be of the form:
> 
>       instance-data-set-name ['@' ( revision-date / timestamp ) ]
>                      ( '.xml' / '.json' )
> 
> This looks (almost?  Not sure about '@' vs. "@".) like valid ABNF.  Do we want to say that and reference RFC 5234 for the interpretation of the symbols?
> BALAZS: reference to ABNF added. Changed to double quotes.
> 
>    If the leaf "name" is present in the instance data header, its value
>    SHOULD be used for the "instance-data-set-name".  If the "revision-
>    date" is present in the filename it MUST conform to the format of the
>    revision-date leaf in the YANG model.  [...]
> 
> This seems unenforcable, and contrary to the Unix ethos.  Why is it necessary to try to have consistency betwen the contents of the file and its name in the file system, as opposed to letting the type and contents of a file speak for itself regardless of the name in the file system?
> BALAZS: We use the convention of RFC7950: to use the name of the top YANG construct 
> in the filename (there the module name here the structure name). 
> In practice this convention proved very useful. (There already exist some implementations of the YANG instance data).
> A similar rule for YANG modules is enforced by many tools e.g., pyang and confdc.

This is just a COMMENT, so I don't specifically object, even if it seems
surprising to me.

>    Metadata, information about the data set itself SHOULD be included in
>    the instance data set.  Some metadata items are defined in the YANG
>    module "ietf-yang-instance-data", but other items MAY be used.
> 
>    Metadata MUST include:
> 
>       -  Version of the YANG Instance Data format
> 
> Doesn't the latter (MUST) effectively make the former (SHOULD) also into a "MUST"?
> BALAZS: Yes, I will change it to MUST. The format-version is a MUST either as a default value 
> (not actually present according to YANG rules) or as an explicitly specified value. 
> The other metadata items are only recommended (SHOULD).
> 
> Also, if this is actually mandatory, shouldn't that be reflected in the YANG module?
> BALAZS: IN the YANG module leaf format-version has a default value. That means that 
> either the default value or some explicitly set vale is always usable for the user of the file. 
> Added text to clarify this.

Ah, good point, I forgot about the interaction between default and
mandatory.

> Section 2.1.2
> 
>    import-only dependencies MAY be excluded from the leaf-list.  If they
>    are excluded then the consumer of the instance data set has to apply
>    the YANG language rules to resolve the imports.  An example of the
> 
> Do we want to say something like "Accordingly, recipients of the instance data set must be prepared to perform this processing, absent prior knowledge about the files they will be processing"?
> BALAZS: According to YANG rules the "implemented" module that is specified in the content schema MAY have used an 
>   Import-by-revision statement in which case the revision date of the imported module is fixed/specified in that YANG module.
> If import-by-revision was not used, any revision of the imported module is usable, which in practice for most tools means the
>    latest available revision. 
> IMHO which revision of an imported module to use should be and is covered by RFC7950.

Ok.  I agree that the YANG spec is pretty clear on what has to happen, so
there's not a strong need to reiterate it here.

> Section 2.2.1
> 
>     <contact>info@acme.com</contact>
> 
> Unfortunately, acme.com is a real domain name; we should probably use a BCP 32 name.  Likewise for urn:rdns:acme.com:oammodel:acme-system-ext,
> etc.
> BALAZS: OK, I will change references to acme.example.com.com as according to BCP 32 example.com is reserved.
> 
> Section 2.2.2
> 
>      <nacm xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-acm">
>        <enable-nacm>true</enable-nacm>
>        <read-default>deny</read-default>
>        <exec-default>deny</exec-default>
> 
> Is there a <write-default> that should be set as well?  Or do we just implicitly rely on the default from RFC 8341?
> BALAZS: The latter. As defined in RFC8341 write-default's default is deny, so it is strict enough.
> 
> Section 3
> 
>          description
>            "An arbitrary name for the YANG instance data set.  This
>             value is primarily used for descriptive purposes.  However,
>             when the instance data set is saved to a file, then the
>             filename MUST encode the name's value, per Section 3
>             of RFC XXXX.";
> 
> I think this requirement is currently stated in Section 2, not 3 (though in my previous comment I suggest that the requirement should be removed).
> BALAZS: Thanks,  Section number corrected.
> 
> Section 4
> 
> (I wrote, then deleted as duplicate, essentially all of the same things that Roman commented on.  Thanks for updating in response to his
> comments.)
> 
>    The document does not specify any method to influence the behavior of
>    a server.
> 
> A few of the listed use cases seem to involve loading configuration into a server, which could perhaps be considered to influence the behavior of the server in question.
> BALAZS: Yes, but the document only defines the data format. Section 1 states:
> " specifying how and when to use YANG instance data is out of
>    scope for this document.  It is anticipated that other documents will
>    define specific use cases.  Use cases are listed only as examples."
> 
>    The header part is not security sensitive with one possible
>    exception.  If the URI method is used for specification of the
>    content schema and the URI includes a username and/or a password, the
>    instance data file needs to be handled securely as mentioned below.
> BALAZS: Corrected based on Roman's comment.
> 
> In the terminology of RFC 3986 this is the "userinfo subcomponent", as in "the URI includes a userinfo subcomponent".
> BALAZS: OK, to be updated.
> 
> NITS
> 
> Section 2.2.1, 2.2.2
> 
> It's a bit challenging to get the <revision> of the file to be much older than the <revision> of the YANG modules it uses.
> BALAZS: It was a bit of a joke to use two historically significant dates
> 1776-07-04 US declaration of independence
> 1956-10-23 Hungary, the start of the revolution against communism and Russian occupation
> I will change them to newer dates.

It does seem fun to have the historically significant dates as the document
is being developed.  I appreciate your willingness to change the dates to
avoid confusing readers about how the dates could have gotten that way in
the examples.

Thanks for all the replies and updates,

Ben


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To: Benjamin Kaduk <kaduk@mit.edu>
CC: The IESG <iesg@ietf.org>, Benoit Claise <benoit.claise@huawei.com>, "draft-ietf-netmod-yang-instance-file-format@ietf.org" <draft-ietf-netmod-yang-instance-file-format@ietf.org>, "netmod-chairs@ietf.org" <netmod-chairs@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>, Kent Watsen <kent+ietf@watsen.net>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/TTygpeMgmwFAhVV6Zio5MflAeYs>
Subject: Re: [netmod] Benjamin Kaduk's No Objection on draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)
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Accepted, last comment. Balazs

-----Original Message-----
From: Benjamin Kaduk <kaduk@mit.edu>=20
Sent: 2021. okt=F3ber 7., cs=FCt=F6rt=F6k 23:45
To: Bal=E1zs Lengyel <balazs.lengyel@ericsson.com>
Cc: The IESG <iesg@ietf.org>; Benoit Claise <benoit.claise@huawei.com>;
draft-ietf-netmod-yang-instance-file-format@ietf.org;
netmod-chairs@ietf.org; netmod@ietf.org; Kent Watsen =
<kent+ietf@watsen.net>
Subject: Re: Benjamin Kaduk's No Objection on
draft-ietf-netmod-yang-instance-file-format-20: (with COMMENT)

Hi Bal=E1zs,

Replies inline as well (where needed)

On Thu, Oct 07, 2021 at 10:43:28AM +0000, Bal=E1zs Lengyel wrote:
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
> Section 2
>=20
>    Two formats are specified based on the XML and JSON YANG encodings.
>    Later, as other YANG encodings (e.g., CBOR) are defined, further
>    instance data formats may be specified.
>=20
> I don't remember seeing a clear description of the specifics of these=20
> two specified formats.  (I assume it's just "use the XML/JSON encoding =

> for YANG structures", but I don't remember that stated anywhere.)
> BALAZS: I added references to the relevant RFCs (7950, 7951, 8791) As =
the
model starts with a YAN structure, I included YANG Data Structure =
Extensions
RFC8791 too.

I was hoping for a statement like "The file formats are achieved by =
applying
the respective XML and JSON encoding rules for the YANG structure =
included
in this document."
BALAZS2: OK
Thanks for all the replies and updates,

Ben

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From nobody Fri Oct  8 10:05:46 2021
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Subject: [netmod] I-D Action: draft-ietf-netmod-yang-instance-file-format-21.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Network Modeling WG of the IETF.

        Title           : YANG Instance Data File Format
        Authors         : Balazs Lengyel
                          Benoit Claise
	Filename        : draft-ietf-netmod-yang-instance-file-format-21.txt
	Pages           : 29
	Date            : 2021-10-08

Abstract:
   There is a need to document data defined in YANG models at design
   time, implementation time or when a live server is unavailable.  This
   document specifies a standard file format for YANG instance data,
   which follows the syntax and semantics of existing YANG models, and
   annotates it with metadata.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-netmod-yang-instance-file-format-21

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-yang-instance-file-format-21


Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



From nobody Mon Oct 11 09:13:53 2021
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NETMOD WG,

According to the preliminary agenda [1], NETMOD is scheduled to meet for =
1-hour on Thursday, November 11th from 14:30-15:30 UTC time.

If you are interested in discussing one or more topics with the WG, =
please send requests to the "netmod-chairs" alias (CC-ed) by October =
24th with the following information, for each discussion, if more than =
one:

- name of the drafts (if any)
- name of discussion topic (usually the title of the draft)
- name of the person(s) leading the discussion
- desired time request (in minutes)

PS: Authors, per the 112 Important Dates page [2], the draft submission =
cutoff is in two weeks, on Monday October 25th.  Please be sure to =
update your drafts before then!

[1] https://datatracker.ietf.org/meeting/112/agenda.html
[2] https://datatracker.ietf.org/meeting/112/important-dates

NETMOD Chairs=


From nobody Mon Oct 11 19:38:10 2021
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In case you didn=E2=80=99t see other messages from the Secretariat =
and/or me, please ne aware that the Virtual Interim stats in ~12 hours!

Details:

WG ICS:		=
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Subject: [netmod] [Errata Verified] RFC7950 (6655)
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The following errata report has been verified for RFC7950,
"The YANG 1.1 Data Modeling Language". 

--------------------------------------
You may review the report below and at:
https://www.rfc-editor.org/errata/eid6655

--------------------------------------
Status: Verified
Type: Editorial

Reported by: Viktor Leijon <vleijon@cisco.com>
Date Reported: 2021-08-06
Verified by: Rob Wilton (IESG)

Section: 10.6.1.1

Original Text
-------------
   leaf flags {
       type bits {
         bit UP;
         bit PROMISCUOUS
         bit DISABLED;
       }
      }

Corrected Text
--------------
   leaf flags {
       type bits {
         bit UP;
         bit PROMISCUOUS;
         bit DISABLED;
       }
      }

Notes
-----
The missing semicolon makes the YANG snippet invalid.

--------------------------------------
RFC7950 (draft-ietf-netmod-rfc6020bis-14)
--------------------------------------
Title               : The YANG 1.1 Data Modeling Language
Publication Date    : August 2016
Author(s)           : M. Bjorklund, Ed.
Category            : PROPOSED STANDARD
Source              : Network Modeling
Area                : Operations and Management
Stream              : IETF
Verifying Party     : IESG


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Subject: [netmod] Clarification on the description for chassis and stack in RFC 8348
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--000000000000a29fd605ce40cf8b
Content-Type: text/plain; charset="UTF-8"

Hi All,

RFC 8348 defines chassis and stack as two identities for networking
equipment. The description for chassis says that* "Any class of physical
component, except a stack, may be contained within a chassis; a chassis may
only be contained within a stack." *First statement of this sentence seems
to suggest that a chassis (which is a component) can also be contained
within a chassis, while the next statement, "*a chassis may only be
contained within a stack.*" seems to suggest that a chassis can be
only contained within a stack and not within another chassis, which seems
to contradict with the previous statement. So, which statement is correct?

Another point to clarify is that in the description for stack, "*...a stack
may be contained within another stack.  Only chassis components should be
contained within a stack.*" Is it correct to understand that a stack can
contain either another stack or a chassis, or both, but nothing else?

I would appreciate the clarification.

Thanks,
Aihua

--000000000000a29fd605ce40cf8b
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div di=
r=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"lt=
r"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr">Hi A=
ll,<div><br></div><div>RFC 8348 defines chassis and stack=C2=A0as two ident=
ities for networking equipment. The description for chassis says that<i> &q=
uot;Any class of physical component, except a stack, may be contained withi=
n a chassis; a chassis may only be contained within a stack.&quot; </i>Firs=
t statement of this sentence seems to suggest that a chassis (which is a co=
mponent) can also be contained within a chassis, while the next statement, =
&quot;<i>a chassis may only be contained within a stack.</i>&quot; seems to=
 suggest that a chassis can be only=C2=A0contained within a stack and not w=
ithin another chassis, which seems to contradict with the previous statemen=
t. So, which statement is correct?</div><div><br></div><div>Another point t=
o clarify is that in the description for stack, &quot;<i>...a stack may be =
contained within another stack.=C2=A0 Only chassis components should be con=
tained within a stack.</i>&quot; Is it correct to understand that a stack c=
an contain either another stack or a chassis, or both, but nothing else?<br=
></div><div><br></div><div>I would appreciate the clarification.=C2=A0</div=
><div><br></div><div>Thanks,</div><div>Aihua</div><div><br></div><div><br><=
/div><div><br></div><div><div><br></div><div><br></div></div></div></div></=
div></div></div></div></div></div></div></div></div></div></div>

--000000000000a29fd605ce40cf8b--


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Subject: [netmod] Tree diagrams
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I do not understand tree diagrams.  My expectation is that the same YANG=0A=
should produce the same tree diagram but apparently not.  I look at=0A=
RFC8519 and see=0A=
=0A=
        |        |  |  +--:(tcp)=0A=
        |        |  |  |  +--rw tcp {match-on-tcp}?=0A=
............=0A=
        |  |  |     +--rw source-port=0A=
        |        |  |  |     |  +--rw (source-port)?=0A=
        |        |  |  |     |     +--:(range-or-operator)=0A=
        |        |  |  |     |        +--rw (port-range-or-operator)?=0A=
=0A=
but when imported into 'draft-ietf-opsawg-vpn-common-12' this becomes=0A=
          |  |     +--:(tcp)=0A=
          |  |     |  +-- tcp=0A=
......=0A=
          |  |     |     +-- (source-port)?=0A=
          |  |     |     |  +--:(source-port-range-or-operator)=0A=
          |  |     |     |     +-- source-port-range-or-operator=0A=
ie the identifiers have gained a 'source'  (or 'destination').=0A=
=0A=
Also, the structure changes.  Moving on, vpn-common has=0A=
=0A=
          |  |     +--:(tcp)=0A=
          |  |     |  +-- tcp=0A=
.....=0A=
          |  |     |     +-- (source-port)?=0A=
          |  |     |     |  +--:(source-port-range-or-operator)=0A=
          |  |     |     |     +-- source-port-range-or-operator=0A=
.......=0A=
          |  |     |     +-- (destination-port)?=0A=
          |  |     |        +--:(destination-port-range-or-operator)=0A=
          |  |     |           +-- destination-port-range-or-operator=0A=
which looks fine until this is imported into=0A=
'draft-ietf-opsawg-l3sm-l3nm-18' when it becomes=0A=
=0A=
   |  |     |  |     +--:(tcp)=0A=
   |  |     |  |     |  +--rw tcp=0A=
...................=0A=
   |  |     |  |     |     +--rw (source-port)?=0A=
   |  |     |  |     |     |  +--:(source-port-range-or-operator)=0A=
   |  |     |  |     |     |     +--rw source-port-range-or-operator=0A=
   |  |     |  |     |     |                      inet:port-number=0A=
=0A=
   |  |     |  |     |     +--rw (destination-port)?=0A=
   |  |     |  |     +--:(destination-port-range-or-operator)=0A=
   |  |     |  |     |          +--rw destination-port-range-or-operator=0A=
   |  |     |  |     |             +--rw (port-range-or-operator)?=0A=
=0A=
'destination-port-range-or-operator' has moved and we now have=0A=
   |  |     |  |     +--:(tcp)=0A=
   |  |     |  |     +--:(destination-port-range-or-operator)=0A=
which does not look fine to me; how can this be?=0A=
=0A=
Earlier drafts of l3nm did not have this feature.=0A=
=0A=
Tom Petch=0A=


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From: "Rob Wilton (rwilton)" <rwilton@cisco.com>
To: tom petch <ietfc@btconnect.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "draft-ietf-opsawg-vpn-common@ietf.org" <draft-ietf-opsawg-vpn-common@ietf.org>
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Subject: Re: [netmod] Tree diagrams
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Hi Tom, Med, Authors

Tom, thanks for flagging these.

Med, authors, please can you check if the tree diagrams in draft-ietf-opsaw=
g-vpn-common-12 or draft-ietf-opsawg-l3sm-l3nm-18 need to be updated.  If t=
hey do, then given that these documents are in the RFC editor queue then we=
 will need to coordinate any corrections with the RFC editor.

Regards,
Rob


> -----Original Message-----
> From: netmod <netmod-bounces@ietf.org> On Behalf Of tom petch
> Sent: 15 October 2021 11:03
> To: netmod@ietf.org
> Subject: [netmod] Tree diagrams
>=20
> I do not understand tree diagrams.  My expectation is that the same YANG
> should produce the same tree diagram but apparently not.  I look at
> RFC8519 and see
>=20
>         |        |  |  +--:(tcp)
>         |        |  |  |  +--rw tcp {match-on-tcp}?
> ............
>         |  |  |     +--rw source-port
>         |        |  |  |     |  +--rw (source-port)?
>         |        |  |  |     |     +--:(range-or-operator)
>         |        |  |  |     |        +--rw (port-range-or-operator)?
>=20
> but when imported into 'draft-ietf-opsawg-vpn-common-12' this becomes
>           |  |     +--:(tcp)
>           |  |     |  +-- tcp
> ......
>           |  |     |     +-- (source-port)?
>           |  |     |     |  +--:(source-port-range-or-operator)
>           |  |     |     |     +-- source-port-range-or-operator
> ie the identifiers have gained a 'source'  (or 'destination').
>=20
> Also, the structure changes.  Moving on, vpn-common has
>=20
>           |  |     +--:(tcp)
>           |  |     |  +-- tcp
> .....
>           |  |     |     +-- (source-port)?
>           |  |     |     |  +--:(source-port-range-or-operator)
>           |  |     |     |     +-- source-port-range-or-operator
> .......
>           |  |     |     +-- (destination-port)?
>           |  |     |        +--:(destination-port-range-or-operator)
>           |  |     |           +-- destination-port-range-or-operator
> which looks fine until this is imported into
> 'draft-ietf-opsawg-l3sm-l3nm-18' when it becomes
>=20
>    |  |     |  |     +--:(tcp)
>    |  |     |  |     |  +--rw tcp
> ...................
>    |  |     |  |     |     +--rw (source-port)?
>    |  |     |  |     |     |  +--:(source-port-range-or-operator)
>    |  |     |  |     |     |     +--rw source-port-range-or-operator
>    |  |     |  |     |     |                      inet:port-number
>=20
>    |  |     |  |     |     +--rw (destination-port)?
>    |  |     |  |     +--:(destination-port-range-or-operator)
>    |  |     |  |     |          +--rw destination-port-range-or-operator
>    |  |     |  |     |             +--rw (port-range-or-operator)?
>=20
> 'destination-port-range-or-operator' has moved and we now have
>    |  |     |  |     +--:(tcp)
>    |  |     |  |     +--:(destination-port-range-or-operator)
> which does not look fine to me; how can this be?
>=20
> Earlier drafts of l3nm did not have this feature.
>=20
> Tom Petch
>=20
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod


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From: tom petch <ietfc@btconnect.com>
To: "Rob Wilton (rwilton)" <rwilton@cisco.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "draft-ietf-opsawg-vpn-common@ietf.org" <draft-ietf-opsawg-vpn-common@ietf.org>
CC: "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: Tree diagrams
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Date: Fri, 15 Oct 2021 10:28:32 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/0C9-9MAuqFsRVPijMb2N9ecdwdA>
Subject: Re: [netmod] Tree diagrams
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From: Rob Wilton (rwilton) <rwilton@cisco.com>=0A=
Sent: 15 October 2021 11:21=0A=
=0A=
=0A=
Hi Tom, Med, Authors=0A=
=0A=
Tom, thanks for flagging these.=0A=
=0A=
Med, authors, please can you check if the tree diagrams in draft-ietf-opsaw=
g-vpn-common-12 or draft-ietf-opsawg-l3sm-l3nm-18 need to be updated.  If t=
hey do, then given that these documents are in the RFC editor queue then we=
 will need to coordinate any corrections with the RFC editor.=0A=
=0A=
<tp>=0A=
Rob=0A=
=0A=
That was quick!  I can think of several explanations none of which would ma=
de l3nm ready for publication.  I raised this on the netmod WG list since t=
hat is where the authors of tree diagrams and  NACL are and they will likel=
y have the best guess as to what has happened and hence what needs fixing. =
 My posts to netmod usually attract a prompt response.=0A=
=0A=
Tom Petch=0A=
=0A=
Regards,=0A=
Rob=0A=
=0A=
=0A=
> -----Original Message-----=0A=
> From: netmod <netmod-bounces@ietf.org> On Behalf Of tom petch=0A=
> Sent: 15 October 2021 11:03=0A=
> To: netmod@ietf.org=0A=
> Subject: [netmod] Tree diagrams=0A=
>=0A=
> I do not understand tree diagrams.  My expectation is that the same YANG=
=0A=
> should produce the same tree diagram but apparently not.  I look at=0A=
> RFC8519 and see=0A=
>=0A=
>         |        |  |  +--:(tcp)=0A=
>         |        |  |  |  +--rw tcp {match-on-tcp}?=0A=
> ............=0A=
>         |  |  |     +--rw source-port=0A=
>         |        |  |  |     |  +--rw (source-port)?=0A=
>         |        |  |  |     |     +--:(range-or-operator)=0A=
>         |        |  |  |     |        +--rw (port-range-or-operator)?=0A=
>=0A=
> but when imported into 'draft-ietf-opsawg-vpn-common-12' this becomes=0A=
>           |  |     +--:(tcp)=0A=
>           |  |     |  +-- tcp=0A=
> ......=0A=
>           |  |     |     +-- (source-port)?=0A=
>           |  |     |     |  +--:(source-port-range-or-operator)=0A=
>           |  |     |     |     +-- source-port-range-or-operator=0A=
> ie the identifiers have gained a 'source'  (or 'destination').=0A=
>=0A=
> Also, the structure changes.  Moving on, vpn-common has=0A=
>=0A=
>           |  |     +--:(tcp)=0A=
>           |  |     |  +-- tcp=0A=
> .....=0A=
>           |  |     |     +-- (source-port)?=0A=
>           |  |     |     |  +--:(source-port-range-or-operator)=0A=
>           |  |     |     |     +-- source-port-range-or-operator=0A=
> .......=0A=
>           |  |     |     +-- (destination-port)?=0A=
>           |  |     |        +--:(destination-port-range-or-operator)=0A=
>           |  |     |           +-- destination-port-range-or-operator=0A=
> which looks fine until this is imported into=0A=
> 'draft-ietf-opsawg-l3sm-l3nm-18' when it becomes=0A=
>=0A=
>    |  |     |  |     +--:(tcp)=0A=
>    |  |     |  |     |  +--rw tcp=0A=
> ...................=0A=
>    |  |     |  |     |     +--rw (source-port)?=0A=
>    |  |     |  |     |     |  +--:(source-port-range-or-operator)=0A=
>    |  |     |  |     |     |     +--rw source-port-range-or-operator=0A=
>    |  |     |  |     |     |                      inet:port-number=0A=
>=0A=
>    |  |     |  |     |     +--rw (destination-port)?=0A=
>    |  |     |  |     +--:(destination-port-range-or-operator)=0A=
>    |  |     |  |     |          +--rw destination-port-range-or-operator=
=0A=
>    |  |     |  |     |             +--rw (port-range-or-operator)?=0A=
>=0A=
> 'destination-port-range-or-operator' has moved and we now have=0A=
>    |  |     |  |     +--:(tcp)=0A=
>    |  |     |  |     +--:(destination-port-range-or-operator)=0A=
> which does not look fine to me; how can this be?=0A=
>=0A=
> Earlier drafts of l3nm did not have this feature.=0A=
>=0A=
> Tom Petch=0A=
>=0A=
> _______________________________________________=0A=
> netmod mailing list=0A=
> netmod@ietf.org=0A=
> https://www.ietf.org/mailman/listinfo/netmod=0A=


From nobody Fri Oct 15 03:58:57 2021
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From: <mohamed.boucadair@orange.com>
To: "Rob Wilton (rwilton)" <rwilton@cisco.com>, tom petch <ietfc@btconnect.com>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "draft-ietf-opsawg-vpn-common@ietf.org" <draft-ietf-opsawg-vpn-common@ietf.org>
CC: "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: Tree diagrams
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Subject: Re: [netmod] Tree diagrams
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Hi Rob, Tom, all,=20

The trees are different because we are not importing the acl module, but ar=
e reusing "packet-fields" from RFC8519 to define the classification rules.=
=20

Please note that trees in vpn-common are printed with "--tree-print-groupin=
gs".=20

I suspected what happened for L3NM is that we touched manually the tree (th=
is was there since -04) because sometimes we need so despite we are using "=
--tree-line-length 69".

We will make this change during AUTH48:

OLD:=20
   |  |     |  |     +--:(destination-port-range-or-operator)

NEW:
   |  |     |  |     |        +--:(destination-port-range-or-operator)

Thank you, Tom. We always need fresh eyes. Much appreciated.=20

Cheers,
Med

> -----Message d'origine-----
> De=A0: Rob Wilton (rwilton) <rwilton@cisco.com>
> Envoy=E9=A0: vendredi 15 octobre 2021 12:22
> =C0=A0: tom petch <ietfc@btconnect.com>; BOUCADAIR Mohamed INNOV/NET
> <mohamed.boucadair@orange.com>; draft-ietf-opsawg-l3sm-l3nm@ietf.org;
> draft-ietf-opsawg-vpn-common@ietf.org
> Cc=A0: netmod@ietf.org
> Objet=A0: RE: Tree diagrams
>=20
> Hi Tom, Med, Authors
>=20
> Tom, thanks for flagging these.
>=20
> Med, authors, please can you check if the tree diagrams in draft-ietf-
> opsawg-vpn-common-12 or draft-ietf-opsawg-l3sm-l3nm-18 need to be updated.
> If they do, then given that these documents are in the RFC editor queue
> then we will need to coordinate any corrections with the RFC editor.
>=20
> Regards,
> Rob
>=20
>=20
> > -----Original Message-----
> > From: netmod <netmod-bounces@ietf.org> On Behalf Of tom petch
> > Sent: 15 October 2021 11:03
> > To: netmod@ietf.org
> > Subject: [netmod] Tree diagrams
> >
> > I do not understand tree diagrams.  My expectation is that the same
> > YANG should produce the same tree diagram but apparently not.  I look
> > at
> > RFC8519 and see
> >
> >         |        |  |  +--:(tcp)
> >         |        |  |  |  +--rw tcp {match-on-tcp}?
> > ............
> >         |  |  |     +--rw source-port
> >         |        |  |  |     |  +--rw (source-port)?
> >         |        |  |  |     |     +--:(range-or-operator)
> >         |        |  |  |     |        +--rw (port-range-or-operator)?
> >
> > but when imported into 'draft-ietf-opsawg-vpn-common-12' this becomes
> >           |  |     +--:(tcp)
> >           |  |     |  +-- tcp
> > ......
> >           |  |     |     +-- (source-port)?
> >           |  |     |     |  +--:(source-port-range-or-operator)
> >           |  |     |     |     +-- source-port-range-or-operator
> > ie the identifiers have gained a 'source'  (or 'destination').
> >
> > Also, the structure changes.  Moving on, vpn-common has
> >
> >           |  |     +--:(tcp)
> >           |  |     |  +-- tcp
> > .....
> >           |  |     |     +-- (source-port)?
> >           |  |     |     |  +--:(source-port-range-or-operator)
> >           |  |     |     |     +-- source-port-range-or-operator
> > .......
> >           |  |     |     +-- (destination-port)?
> >           |  |     |        +--:(destination-port-range-or-operator)
> >           |  |     |           +-- destination-port-range-or-operator
> > which looks fine until this is imported into
> > 'draft-ietf-opsawg-l3sm-l3nm-18' when it becomes
> >
> >    |  |     |  |     +--:(tcp)
> >    |  |     |  |     |  +--rw tcp
> > ...................
> >    |  |     |  |     |     +--rw (source-port)?
> >    |  |     |  |     |     |  +--:(source-port-range-or-operator)
> >    |  |     |  |     |     |     +--rw source-port-range-or-operator
> >    |  |     |  |     |     |                      inet:port-number
> >
> >    |  |     |  |     |     +--rw (destination-port)?
> >    |  |     |  |     +--:(destination-port-range-or-operator)
> >    |  |     |  |     |          +--rw destination-port-range-or-operator
> >    |  |     |  |     |             +--rw (port-range-or-operator)?
> >
> > 'destination-port-range-or-operator' has moved and we now have
> >    |  |     |  |     +--:(tcp)
> >    |  |     |  |     +--:(destination-port-range-or-operator)
> > which does not look fine to me; how can this be?
> >
> > Earlier drafts of l3nm did not have this feature.
> >
> > Tom Petch
> >
> > _______________________________________________
> > netmod mailing list
> > netmod@ietf.org
> > https://www.ietf.org/mailman/listinfo/netmod

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From: tom petch <ietfc@btconnect.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Rob Wilton (rwilton)" <rwilton@cisco.com>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "draft-ietf-opsawg-vpn-common@ietf.org" <draft-ietf-opsawg-vpn-common@ietf.org>
CC: "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: Tree diagrams
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/dZl1Ge71DMZgroKblbEUVfPkaCU>
Subject: Re: [netmod] Tree diagrams
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From: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>=0A=
Sent: 15 October 2021 11:58=0A=
=0A=
Hi Rob, Tom, all,=0A=
=0A=
The trees are different because we are not importing the acl module, but ar=
e reusing "packet-fields" from RFC8519 to define the classification rules.=
=0A=
=0A=
Please note that trees in vpn-common are printed with "--tree-print-groupin=
gs".=0A=
=0A=
<tp>=0A=
That feature I do not understand.  I agree that you are reusing packet-fiel=
ds from RFC8519 but that module has 'grouping port-range-or-operator' with =
no mention AFAICT of a 'source' or a 'destination' in the identifier.  Did =
you edit all those in as well?=0A=
=0A=
Tom Petch=0A=
=0A=
I suspected what happened for L3NM is that we touched manually the tree (th=
is was there since -04) because sometimes we need so despite we are using "=
--tree-line-length 69".=0A=
=0A=
We will make this change during AUTH48:=0A=
=0A=
OLD:=0A=
   |  |     |  |     +--:(destination-port-range-or-operator)=0A=
=0A=
NEW:=0A=
   |  |     |  |     |        +--:(destination-port-range-or-operator)=0A=
=0A=
Thank you, Tom. We always need fresh eyes. Much appreciated.=0A=
=0A=
Cheers,=0A=
Med=0A=
=0A=
> -----Message d'origine-----=0A=
> De : Rob Wilton (rwilton) <rwilton@cisco.com>=0A=
> Envoy=E9 : vendredi 15 octobre 2021 12:22=0A=
> =C0 : tom petch <ietfc@btconnect.com>; BOUCADAIR Mohamed INNOV/NET=0A=
> <mohamed.boucadair@orange.com>; draft-ietf-opsawg-l3sm-l3nm@ietf.org;=0A=
> draft-ietf-opsawg-vpn-common@ietf.org=0A=
> Cc : netmod@ietf.org=0A=
> Objet : RE: Tree diagrams=0A=
>=0A=
> Hi Tom, Med, Authors=0A=
>=0A=
> Tom, thanks for flagging these.=0A=
>=0A=
> Med, authors, please can you check if the tree diagrams in draft-ietf-=0A=
> opsawg-vpn-common-12 or draft-ietf-opsawg-l3sm-l3nm-18 need to be updated=
.=0A=
> If they do, then given that these documents are in the RFC editor queue=
=0A=
> then we will need to coordinate any corrections with the RFC editor.=0A=
>=0A=
> Regards,=0A=
> Rob=0A=
>=0A=
>=0A=
> > -----Original Message-----=0A=
> > From: netmod <netmod-bounces@ietf.org> On Behalf Of tom petch=0A=
> > Sent: 15 October 2021 11:03=0A=
> > To: netmod@ietf.org=0A=
> > Subject: [netmod] Tree diagrams=0A=
> >=0A=
> > I do not understand tree diagrams.  My expectation is that the same=0A=
> > YANG should produce the same tree diagram but apparently not.  I look=
=0A=
> > at=0A=
> > RFC8519 and see=0A=
> >=0A=
> >         |        |  |  +--:(tcp)=0A=
> >         |        |  |  |  +--rw tcp {match-on-tcp}?=0A=
> > ............=0A=
> >         |  |  |     +--rw source-port=0A=
> >         |        |  |  |     |  +--rw (source-port)?=0A=
> >         |        |  |  |     |     +--:(range-or-operator)=0A=
> >         |        |  |  |     |        +--rw (port-range-or-operator)?=
=0A=
> >=0A=
> > but when imported into 'draft-ietf-opsawg-vpn-common-12' this becomes=
=0A=
> >           |  |     +--:(tcp)=0A=
> >           |  |     |  +-- tcp=0A=
> > ......=0A=
> >           |  |     |     +-- (source-port)?=0A=
> >           |  |     |     |  +--:(source-port-range-or-operator)=0A=
> >           |  |     |     |     +-- source-port-range-or-operator=0A=
> > ie the identifiers have gained a 'source'  (or 'destination').=0A=
> >=0A=
> > Also, the structure changes.  Moving on, vpn-common has=0A=
> >=0A=
> >           |  |     +--:(tcp)=0A=
> >           |  |     |  +-- tcp=0A=
> > .....=0A=
> >           |  |     |     +-- (source-port)?=0A=
> >           |  |     |     |  +--:(source-port-range-or-operator)=0A=
> >           |  |     |     |     +-- source-port-range-or-operator=0A=
> > .......=0A=
> >           |  |     |     +-- (destination-port)?=0A=
> >           |  |     |        +--:(destination-port-range-or-operator)=0A=
> >           |  |     |           +-- destination-port-range-or-operator=
=0A=
> > which looks fine until this is imported into=0A=
> > 'draft-ietf-opsawg-l3sm-l3nm-18' when it becomes=0A=
> >=0A=
> >    |  |     |  |     +--:(tcp)=0A=
> >    |  |     |  |     |  +--rw tcp=0A=
> > ...................=0A=
> >    |  |     |  |     |     +--rw (source-port)?=0A=
> >    |  |     |  |     |     |  +--:(source-port-range-or-operator)=0A=
> >    |  |     |  |     |     |     +--rw source-port-range-or-operator=0A=
> >    |  |     |  |     |     |                      inet:port-number=0A=
> >=0A=
> >    |  |     |  |     |     +--rw (destination-port)?=0A=
> >    |  |     |  |     +--:(destination-port-range-or-operator)=0A=
> >    |  |     |  |     |          +--rw destination-port-range-or-operato=
r=0A=
> >    |  |     |  |     |             +--rw (port-range-or-operator)?=0A=
> >=0A=
> > 'destination-port-range-or-operator' has moved and we now have=0A=
> >    |  |     |  |     +--:(tcp)=0A=
> >    |  |     |  |     +--:(destination-port-range-or-operator)=0A=
> > which does not look fine to me; how can this be?=0A=
> >=0A=
> > Earlier drafts of l3nm did not have this feature.=0A=
> >=0A=
> > Tom Petch=0A=
> >=0A=
> > _______________________________________________=0A=
> > netmod mailing list=0A=
> > netmod@ietf.org=0A=
> > https://www.ietf.org/mailman/listinfo/netmod=0A=
=0A=
___________________________________________________________________________=
______________________________________________=0A=
=0A=
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From: <mohamed.boucadair@orange.com>
To: tom petch <ietfc@btconnect.com>, "Rob Wilton (rwilton)" <rwilton@cisco.com>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "draft-ietf-opsawg-vpn-common@ietf.org" <draft-ietf-opsawg-vpn-common@ietf.org>
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Thread-Topic: Tree diagrams
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Subject: Re: [netmod] Tree diagrams
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Re-,

Please see inline.=20

Cheers,
Med

> -----Message d'origine-----
> De=A0: tom petch <ietfc@btconnect.com>
> Envoy=E9=A0: vendredi 15 octobre 2021 13:12
> =C0=A0: BOUCADAIR Mohamed INNOV/NET <mohamed.boucadair@orange.com>; Rob W=
ilton
> (rwilton) <rwilton@cisco.com>; draft-ietf-opsawg-l3sm-l3nm@ietf.org;
> draft-ietf-opsawg-vpn-common@ietf.org
> Cc=A0: netmod@ietf.org
> Objet=A0: Re: Tree diagrams
>=20
> From: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>
> Sent: 15 October 2021 11:58
>=20
> Hi Rob, Tom, all,
>=20
> The trees are different because we are not importing the acl module, but
> are reusing "packet-fields" from RFC8519 to define the classification
> rules.
>=20
> Please note that trees in vpn-common are printed with "--tree-print-
> groupings".
>=20
> <tp>
> That feature I do not understand.  I agree that you are reusing packet-
> fields from RFC8519 but that module has 'grouping port-range-or-operator'
> with no mention AFAICT of a 'source' or a 'destination' in the identifier.
> Did you edit all those in as well?

[Med] Here is an excerpt of the "ports" grouping in vpn-common:=20

=3D=3D
       choice source-port {
         description
           "Choice of specifying the source port or referring to a group
            of source port numbers.";
         container source-port-range-or-operator {
           description
             "Source port definition.";
           uses packet-fields:port-range-or-operator;
         }
       }
=3D=3D

which will be pronted as:=20

           1:   grouping ports
           2:     +-- (source-port)?
           3:     |  +--:(source-port-range-or-operator)
           4:     |     +-- source-port-range-or-operator
           5:     |        +-- (port-range-or-operator)?
           6:     |           +--:(range)
           7:     |           |  +-- lower-port    inet:port-number
           8:     |           |  +-- upper-port    inet:port-number
           9:     |           +--:(operator)
          10:     |              +-- operator?     operator
          11:     |              +-- port          inet:port-number


The names in lines 1-4 are those in the common module, 5-11 are those in pa=
cket-fields.=20=20

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From: tom petch <ietfc@btconnect.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Rob Wilton (rwilton)" <rwilton@cisco.com>, "draft-ietf-opsawg-l3sm-l3nm@ietf.org" <draft-ietf-opsawg-l3sm-l3nm@ietf.org>, "draft-ietf-opsawg-vpn-common@ietf.org" <draft-ietf-opsawg-vpn-common@ietf.org>
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Thread-Topic: Tree diagrams
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/1_gw91uIUJadtvjDydmcTcbWa9E>
Subject: Re: [netmod] Tree diagrams
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From: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>=0A=
Sent: 15 October 2021 12:24=0A=
=0A=
Re-,=0A=
=0A=
Please see inline.=0A=
=0A=
Cheers,=0A=
Med=0A=
=0A=
> -----Message d'origine-----=0A=
> De : tom petch <ietfc@btconnect.com>=0A=
> Envoy=E9 : vendredi 15 octobre 2021 13:12=0A=
>=0A=
> From: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>=0A=
> Sent: 15 October 2021 11:58=0A=
>=0A=
> Hi Rob, Tom, all,=0A=
>=0A=
> The trees are different because we are not importing the acl module, but=
=0A=
> are reusing "packet-fields" from RFC8519 to define the classification=0A=
> rules.=0A=
>=0A=
> Please note that trees in vpn-common are printed with "--tree-print-=0A=
> groupings".=0A=
>=0A=
> <tp>=0A=
> That feature I do not understand.  I agree that you are reusing packet-=
=0A=
> fields from RFC8519 but that module has 'grouping port-range-or-operator'=
=0A=
> with no mention AFAICT of a 'source' or a 'destination' in the identifier=
.=0A=
> Did you edit all those in as well?=0A=
=0A=
[Med] Here is an excerpt of the "ports" grouping in vpn-common:=0A=
=0A=
=3D=3D=0A=
       choice source-port {=0A=
         description=0A=
           "Choice of specifying the source port or referring to a group=0A=
            of source port numbers.";=0A=
         container source-port-range-or-operator {=0A=
           description=0A=
             "Source port definition.";=0A=
           uses packet-fields:port-range-or-operator;=0A=
         }=0A=
       }=0A=
=3D=3D=0A=
=0A=
which will be pronted as:=0A=
=0A=
           1:   grouping ports=0A=
           2:     +-- (source-port)?=0A=
           3:     |  +--:(source-port-range-or-operator)=0A=
           4:     |     +-- source-port-range-or-operator=0A=
           5:     |        +-- (port-range-or-operator)?=0A=
           6:     |           +--:(range)=0A=
           7:     |           |  +-- lower-port    inet:port-number=0A=
           8:     |           |  +-- upper-port    inet:port-number=0A=
           9:     |           +--:(operator)=0A=
          10:     |              +-- operator?     operator=0A=
          11:     |              +-- port          inet:port-number=0A=
=0A=
=0A=
The names in lines 1-4 are those in the common module, 5-11 are those in pa=
cket-fields.=0A=
=0A=
<tp2>=0A=
Ah yes, I said that I did not understand Tree Diagrams:-(.  The name printe=
d is that of the container above the 'uses'.  I did spot the misalignment f=
irst and then tried to work out the underlying YANG and failed, hence my co=
mment!=0A=
=0A=
Tom Petch=0A=
=0A=
=0A=


From nobody Fri Oct 15 09:04:10 2021
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Cc: Kent Watsen <kent+ietf@watsen.net>, The IESG <iesg@ietf.org>, draft-ietf-netmod-yang-instance-file-format@ietf.org, kent+ietf@watsen.net, netmod-chairs@ietf.org, netmod@ietf.org, rfc-editor@rfc-editor.org, rwilton@cisco.com
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/xjph9oblk7Ac6BBuZudIZ8mNk1c>
Subject: [netmod] Protocol Action: 'YANG Instance Data File Format' to Proposed Standard (draft-ietf-netmod-yang-instance-file-format-21.txt)
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The IESG has approved the following document:
- 'YANG Instance Data File Format'
  (draft-ietf-netmod-yang-instance-file-format-21.txt) as Proposed Standard

This document is the product of the Network Modeling Working Group.

The IESG contact persons are Warren Kumari and Robert Wilton.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-instance-file-format/




Technical Summary

   There is a need to document data defined in YANG models when a live
   server is unavailable.  Data is often needed at design or
   implementation time or needed when a live running server is
   unavailable.  This document specifies a standard file format for YANG
   instance data, which follows the syntax and semantics of existing
   YANG models, and annotates it with metadata.

Working Group Summary

  This document is clearly useful and had good support in the WG.

Document Quality

   The document has had a good level of discussion.  I would like to thank
   Kent, the shepherd who performed as detailed review of this document
   that improved its quality and consistency.

   Ericsson implemented an earlier version of this draft and plans to
   implement the final version once it's published.  I expect other
   vendors to implement.  Other IETF network management work
   makes use of the file format defined by this document.

   There was a YANG doctor review during last call.

Personnel

   The Shepherd is Kent Watsen.
   The responsible AD is Robert Wilton.


From nobody Fri Oct 15 15:38:56 2021
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From: "\"IETF Secretariat\"" <agenda@ietf.org>
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Subject: [netmod] netmod - Requested session has been scheduled for IETF 112
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Dear Lou Berger,

The session(s) that you have requested have been scheduled.
Below is the scheduled session information followed by
the original request. 


    netmod Session 1 (1:00 requested)
    Thursday, 11 November 2021, Session II 1430-1530
    Room Name: Room 5 size: 505
    ---------------------------------------------


iCalendar: https://datatracker.ietf.org/meeting/112/sessions/netmod.ics

Request Information:


---------------------------------------------------------
Working Group Name: Network Modeling
Area Name: Operations and Management Area
Session Requester: Lou Berger


Number of Sessions: 1
Length of Session(s):  1 Hour
Number of Attendees: 100
Conflicts to Avoid: 

       


People who must be present:
  Joel Jaeggli
  Kent Watsen
  Lou Berger
  Robert Wilton

Resources Requested:

Special Requests:
  
---------------------------------------------------------



From nobody Mon Oct 18 03:11:18 2021
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/LOnFTuYAm0wI3P8n9QFFfE4FYKw>
Subject: [netmod] Printable or visible string in YANG
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Hello,

Is there a way in YANG to restrict a string to printable or visible
characters? (Something like SNMP DisplayString)

Regards Balazs

 

-- 

Balazs Lengyel                    Senior Specialist
Ericsson Hungary Ltd. 

Mobile: +36-70-330-7909              email: Balazs.Lengyel@ericsson.com

 


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class=3DWordSection1><p class=3DMsoNormal>Hello,<o:p></o:p></p><p =
class=3DMsoNormal>Is there a way in YANG to restrict a string to =
printable or visible characters? (Something like SNMP =
DisplayString)<o:p></o:p></p><p class=3DMsoNormal>Regards =
Balazs<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>-- <o:p></o:p></p><p class=3DMsoNormal>Balazs =
Lengyel=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Senior =
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+36-70-330-7909=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 email: =
Balazs.Lengyel@ericsson.com<o:p></o:p></p><p =
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From nobody Mon Oct 18 04:25:13 2021
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Subject: Re: [netmod] Printable or visible string in YANG
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Hi Balazs,

Unicode (if you mean it) is so convoluted that the notion of 
printable/visible characters doesn't make much sense. It is IMO much 
safer to specify character classes that you want to permit.

Lada

On 18. 10. 21 12:11, Balázs Lengyel wrote:
> Hello,
> 
> Is there a way in YANG to restrict a string to printable or visible 
> characters? (Something like SNMP DisplayString)
> 
> Regards Balazs
> 
> -- 
> 
> Balazs Lengyel                    Senior 
> Specialist                       Ericsson Hungary Ltd.
> 
> Mobile: +36-70-330-7909              email: Balazs.Lengyel@ericsson.com
> 
> 
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod
> 

-- 
Ladislav Lhotka
Head, CZ.NIC Labs
PGP Key ID: 0xB8F92B08A9F76C67


From nobody Tue Oct 19 00:06:47 2021
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Subject: Re: [netmod] Printable or visible string in YANG
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Hi Balazs,

And don't forget that in YANG 1.1 you can exclude characters.

type string {
  pattern ".*\n.*" { modifier invert-match; } // Disallow newline =
characters
  pattern ".*\r.*" { modifier invert-match; } // Disallow carriage =
return characters
}

/jan



> On 18 Oct 2021, at 13:24, Ladislav Lhotka <ladislav.lhotka@nic.cz> =
wrote:
>=20
> Hi Balazs,
>=20
> Unicode (if you mean it) is so convoluted that the notion of =
printable/visible characters doesn't make much sense. It is IMO much =
safer to specify character classes that you want to permit.
>=20
> Lada
>=20
> On 18. 10. 21 12:11, Bal=C3=A1zs Lengyel wrote:
>> Hello,
>> Is there a way in YANG to restrict a string to printable or visible =
characters? (Something like SNMP DisplayString)
>> Regards Balazs
>> --=20
>> Balazs Lengyel                    Senior Specialist                   =
    Ericsson Hungary Ltd.
>> Mobile: +36-70-330-7909              email: =
Balazs.Lengyel@ericsson.com
>> _______________________________________________
>> netmod mailing list
>> netmod@ietf.org
>> https://www.ietf.org/mailman/listinfo/netmod
>=20
> --=20
> Ladislav Lhotka
> Head, CZ.NIC Labs
> PGP Key ID: 0xB8F92B08A9F76C67
>=20
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod


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Subject: Re: [netmod] Printable or visible string in YANG
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On 19. 10. 21 9:06, Jan Lindblad wrote:
> Hi Balazs,
> 
> And don't forget that in YANG 1.1 you can exclude characters.
> 
> type string {
>    pattern ".*\n.*" { modifier invert-match; } // Disallow newline characters
>    pattern ".*\r.*" { modifier invert-match; } // Disallow carriage return characters
> }

It is also worth noting that in fact (sec. 9.4 in RFC 7950) "The string 
built-in type represents human-readable strings in YANG." This may 
possibly be what Balazs wants, although I doubt that there is an 
implementation that can really *print* all such strings.

Lada

> 
> /jan
> 
> 
> 
>> On 18 Oct 2021, at 13:24, Ladislav Lhotka <ladislav.lhotka@nic.cz> wrote:
>>
>> Hi Balazs,
>>
>> Unicode (if you mean it) is so convoluted that the notion of printable/visible characters doesn't make much sense. It is IMO much safer to specify character classes that you want to permit.
>>
>> Lada
>>
>> On 18. 10. 21 12:11, Balázs Lengyel wrote:
>>> Hello,
>>> Is there a way in YANG to restrict a string to printable or visible characters? (Something like SNMP DisplayString)
>>> Regards Balazs
>>> -- 
>>> Balazs Lengyel                    Senior Specialist                       Ericsson Hungary Ltd.
>>> Mobile: +36-70-330-7909              email: Balazs.Lengyel@ericsson.com
>>> _______________________________________________
>>> netmod mailing list
>>> netmod@ietf.org
>>> https://www.ietf.org/mailman/listinfo/netmod
>>
>> -- 
>> Ladislav Lhotka
>> Head, CZ.NIC Labs
>> PGP Key ID: 0xB8F92B08A9F76C67
>>
>> _______________________________________________
>> netmod mailing list
>> netmod@ietf.org
>> https://www.ietf.org/mailman/listinfo/netmod
> 

-- 
Ladislav Lhotka
Head, CZ.NIC Labs
PGP Key ID: 0xB8F92B08A9F76C67


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Magnus,

You could define your own type and write what you say below in the =
description. It may not be important to construct a YANG pattern that =
captures X.680 exactly. Your server (and client) implementations can =
still reject transactions containing illegal characters based on the =
description.

Best Regards,
/jan

> The ask from Bal=C3=A1zs originated from me who noticed that we in =
3GPP have defined some parameters in interfaces to conform to ASN.1 =
visible and printable strings. Then in specification of IOCs specified =
that the IOC attributes should conform to the visible and printable =
string formats defined in ITU-T X.680, but when defined in Yang a normal =
string type was accidentally used allowing any char to be injected.
> My simple ask was then whether there already exist standardized yang =
types for the string types defined in ITU-T X.680, or if we should =
propose such types to be defined (and then of course used in the 3GPP =
provided Yang files).
>=20
> It is of course good the Yang language is supportive to define custom =
types. Then it is "just do it", which is easier said than done, =
impacting a significant set or already released 3GPP released yang =
files.
> BR Magnus
>=20
> -----Original Message-----
> From: Ladislav Lhotka <ladislav.lhotka@nic.cz>=20
> Sent: den 19 oktober 2021 09:58
> To: Jan Lindblad <janl@tail-f.com>; Bal=C3=A1zs Lengyel =
<balazs.lengyel=3D40ericsson.com@dmarc.ietf.org>
> Cc: netmod@ietf.org; Magnus Standar <magnus.standar@ericsson.com>
> Subject: Re: [netmod] Printable or visible string in YANG
>=20
> On 19. 10. 21 9:06, Jan Lindblad wrote:
>> Hi Balazs,
>>=20
>> And don't forget that in YANG 1.1 you can exclude characters.
>>=20
>> type string {
>>   pattern ".*\n.*" { modifier invert-match; } // Disallow newline =
characters
>>   pattern ".*\r.*" { modifier invert-match; } // Disallow carriage=20
>> return characters }
>=20
> It is also worth noting that in fact (sec. 9.4 in RFC 7950) "The =
string built-in type represents human-readable strings in YANG." This =
may possibly be what Balazs wants, although I doubt that there is an =
implementation that can really *print* all such strings.
>=20
> Lada
>=20
>>=20
>> /jan
>>=20
>>=20
>>=20
>>> On 18 Oct 2021, at 13:24, Ladislav Lhotka <ladislav.lhotka@nic.cz> =
wrote:
>>>=20
>>> Hi Balazs,
>>>=20
>>> Unicode (if you mean it) is so convoluted that the notion of =
printable/visible characters doesn't make much sense. It is IMO much =
safer to specify character classes that you want to permit.
>>>=20
>>> Lada
>>>=20
>>> On 18. 10. 21 12:11, Bal=C3=A1zs Lengyel wrote:
>>>> Hello,
>>>> Is there a way in YANG to restrict a string to printable or visible=20=

>>>> characters? (Something like SNMP DisplayString) Regards Balazs
>>>> --=20
>>>> Balazs Lengyel                    Senior Specialist                 =
      Ericsson Hungary Ltd.
>>>> Mobile: +36-70-330-7909              email: =
Balazs.Lengyel@ericsson.com
>>>> _______________________________________________
>>>> netmod mailing list
>>>> netmod@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/netmod
>>>=20
>>> --
>>> Ladislav Lhotka
>>> Head, CZ.NIC Labs
>>> PGP Key ID: 0xB8F92B08A9F76C67
>>>=20
>>> _______________________________________________
>>> netmod mailing list
>>> netmod@ietf.org
>>> https://www.ietf.org/mailman/listinfo/netmod
>>=20
>=20
> --
> Ladislav Lhotka
> Head, CZ.NIC Labs
> PGP Key ID: 0xB8F92B08A9F76C67


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From: Mahesh Jethanandani <mjethanandani@gmail.com>
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Subject: Re: [netmod] New Version Notification for draft-dbb-netmod-acl-00.txt
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Hi,

The NETMOD WG has the following GitHub repository to track issues =
related to the ACL model. It would make sense to open issues against the =
model there, and discuss them on the netmod mailing list. The WG can =
then decide based on the issues opened whether a -bis document is =
warranted or not.

https://github.com/netmod-wg/acl-model/issues =
<https://github.com/netmod-wg/acl-model/issues>

Thanks

> On Oct 19, 2021, at 9:33 AM, Oscar Gonz=C3=A1lez de Dios =
<oscar.gonzalezdedios@telefonica.com> wrote:
>=20
> Dear Netmod colleagues,
>=20
>        We discussed in the list some time ago a few possible =
enhancements on the ACL Yang model (RFC 8519).
>=20
>        Following the suggestions received the list, we've prepared an =
individual draft in which we document the motivation of several =
enhacements to the Access control list Yang model. Note that, in this =
first version of the document, we have not included on purpose any yang =
model. We are seeking the work direction from the netmod WG whether the =
missing features can be accomplished by means of augmentations or =
whether an ACL-bis document  is more appropriate.
>=20
>               Looking forward to receiving your comments / thoughts/ =
suggestions.
>=20
>        Best Regards,
>=20
>                Oscar, Samier, Med
>=20
> -----Mensaje original-----
> De: internet-drafts@ietf.org <internet-drafts@ietf.org>
> Enviado el: lunes, 18 de octubre de 2021 13:06
> Para: Mohamed Boucadair <mohamed.boucadair@orange.com>; Oscar =
Gonz=C3=A1lez de Dios <oscar.gonzalezdedios@telefonica.com>; Oscar =
Gonz=C3=A1lez de Dios <oscar.gonzalezdedios@telefonica.com>; SAMIER =
BARGUIL GIRALDO <samier.barguilgiraldo.ext@telefonica.com>; SAMIER =
BARGUIL GIRALDO <samier.barguilgiraldo.ext@telefonica.com>
> Asunto: New Version Notification for draft-dbb-netmod-acl-00.txt
>=20
>=20
> A new version of I-D, draft-dbb-netmod-acl-00.txt has been =
successfully submitted by Oscar Gonzalez de Dios and posted to the IETF =
repository.
>=20
> Name:           draft-dbb-netmod-acl
> Revision:       00
> Title:          Extensions to the Access Control Lists (ACLs) YANG =
Model
> Document date:  2021-10-18
> Group:          Individual Submission
> Pages:          18
> URL:            =
https://www.ietf.org/archive/id/draft-dbb-netmod-acl-00.txt
> Status:         https://datatracker.ietf.org/doc/draft-dbb-netmod-acl/
> Htmlized:       =
https://datatracker.ietf.org/doc/html/draft-dbb-netmod-acl
>=20
>=20
> Abstract:
>   RFC 8519 defines a YANG data model for Access Control Lists (ACLs).
>   This document discusses a set of extensions that fix many of the
>   limitations of the ACL model as initially defined in RFC 8519.
>=20
>=20
>=20
>=20
> The IETF Secretariat
>=20
>=20
>=20
> ________________________________
>=20
> Este mensaje y sus adjuntos se dirigen exclusivamente a su =
destinatario, puede contener informaci=C3=B3n privilegiada o =
confidencial y es para uso exclusivo de la persona o entidad de destino. =
Si no es usted. el destinatario indicado, queda notificado de que la =
lectura, utilizaci=C3=B3n, divulgaci=C3=B3n y/o copia sin autorizaci=C3=B3=
n puede estar prohibida en virtud de la legislaci=C3=B3n vigente. Si ha =
recibido este mensaje por error, le rogamos que nos lo comunique =
inmediatamente por esta misma v=C3=ADa y proceda a su destrucci=C3=B3n.
>=20
> The information contained in this transmission is privileged and =
confidential information intended only for the use of the individual or =
entity named above. If the reader of this message is not the intended =
recipient, you are hereby notified that any dissemination, distribution =
or copying of this communication is strictly prohibited. If you have =
received this transmission in error, do not read it. Please immediately =
reply to the sender that you have received this communication in error =
and then delete it.
>=20
> Esta mensagem e seus anexos se dirigem exclusivamente ao seu =
destinat=C3=A1rio, pode conter informa=C3=A7=C3=A3o privilegiada ou =
confidencial e =C3=A9 para uso exclusivo da pessoa ou entidade de =
destino. Se n=C3=A3o =C3=A9 vossa senhoria o destinat=C3=A1rio indicado, =
fica notificado de que a leitura, utiliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3=
o e/ou c=C3=B3pia sem autoriza=C3=A7=C3=A3o pode estar proibida em =
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> _______________________________________________
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> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod

Mahesh Jethanandani
mjethanandani@gmail.com






--Apple-Mail=_51338275-649F-40EA-A260-4F1B5B9BEDF8
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">Hi,<div class=3D""><br class=3D""></div><div class=3D"">The =
NETMOD WG has the following GitHub repository to track issues related to =
the ACL model. It would make sense to open issues against the model =
there, and discuss them on the netmod mailing list. The WG can then =
decide based on the issues opened whether a -bis document is warranted =
or not.</div><div class=3D""><br class=3D""></div><div class=3D""><a =
href=3D"https://github.com/netmod-wg/acl-model/issues" =
class=3D"">https://github.com/netmod-wg/acl-model/issues</a></div><div =
class=3D""><br class=3D""></div><div class=3D"">Thanks<br =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Oct 19, 2021, at 9:33 AM, Oscar Gonz=C3=A1lez de Dios =
&lt;<a href=3D"mailto:oscar.gonzalezdedios@telefonica.com" =
class=3D"">oscar.gonzalezdedios@telefonica.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D"">Dear =
Netmod colleagues,<br class=3D""><br class=3D""> =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We discussed in the list some =
time ago a few possible enhancements on the ACL Yang model (RFC =
8519).<br class=3D""><br class=3D""> =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Following the suggestions =
received the list, we've prepared an individual draft in which we =
document the motivation of several enhacements to the Access control =
list Yang model. Note that, in this first version of the document, we =
have not included on purpose any yang model. We are seeking the work =
direction from the netmod WG whether the missing features can be =
accomplished by means of augmentations or whether an ACL-bis document =
&nbsp;is more appropriate.<br class=3D""><br class=3D""> =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;Looking forward to receiving your comments / thoughts/ =
suggestions.<br class=3D""><br class=3D""> =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Best Regards,<br class=3D""><br =
class=3D""> =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;Oscar, Samier, Med<br class=3D""><br =
class=3D"">-----Mensaje original-----<br class=3D"">De: <a =
href=3D"mailto:internet-drafts@ietf.org" =
class=3D"">internet-drafts@ietf.org</a> &lt;<a =
href=3D"mailto:internet-drafts@ietf.org" =
class=3D"">internet-drafts@ietf.org</a>&gt;<br class=3D"">Enviado el: =
lunes, 18 de octubre de 2021 13:06<br class=3D"">Para: Mohamed Boucadair =
&lt;<a href=3D"mailto:mohamed.boucadair@orange.com" =
class=3D"">mohamed.boucadair@orange.com</a>&gt;; Oscar Gonz=C3=A1lez de =
Dios &lt;<a href=3D"mailto:oscar.gonzalezdedios@telefonica.com" =
class=3D"">oscar.gonzalezdedios@telefonica.com</a>&gt;; Oscar Gonz=C3=A1le=
z de Dios &lt;<a href=3D"mailto:oscar.gonzalezdedios@telefonica.com" =
class=3D"">oscar.gonzalezdedios@telefonica.com</a>&gt;; SAMIER BARGUIL =
GIRALDO &lt;<a href=3D"mailto:samier.barguilgiraldo.ext@telefonica.com" =
class=3D"">samier.barguilgiraldo.ext@telefonica.com</a>&gt;; SAMIER =
BARGUIL GIRALDO &lt;<a =
href=3D"mailto:samier.barguilgiraldo.ext@telefonica.com" =
class=3D"">samier.barguilgiraldo.ext@telefonica.com</a>&gt;<br =
class=3D"">Asunto: New Version Notification for =
draft-dbb-netmod-acl-00.txt<br class=3D""><br class=3D""><br class=3D"">A =
new version of I-D, draft-dbb-netmod-acl-00.txt has been successfully =
submitted by Oscar Gonzalez de Dios and posted to the IETF =
repository.<br class=3D""><br class=3D"">Name: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;draft-dbb-netm=
od-acl<br class=3D"">Revision: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;00<br =
class=3D"">Title: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Extensions to the =
Access Control Lists (ACLs) YANG Model<br class=3D"">Document date: =
&nbsp;2021-10-18<br class=3D"">Group: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Individual =
Submission<br class=3D"">Pages: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;18<br =
class=3D"">URL: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://www.ietf.org/archive/id/draft-dbb-netmod-acl-00.txt" =
class=3D"">https://www.ietf.org/archive/id/draft-dbb-netmod-acl-00.txt</a>=
<br class=3D"">Status: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://datatracker.ietf.org/doc/draft-dbb-netmod-acl/" =
class=3D"">https://datatracker.ietf.org/doc/draft-dbb-netmod-acl/</a><br =
class=3D"">Htmlized: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://datatracker.ietf.org/doc/html/draft-dbb-netmod-acl" =
class=3D"">https://datatracker.ietf.org/doc/html/draft-dbb-netmod-acl</a><=
br class=3D""><br class=3D""><br class=3D"">Abstract:<br class=3D""> =
&nbsp;&nbsp;RFC 8519 defines a YANG data model for Access Control Lists =
(ACLs).<br class=3D""> &nbsp;&nbsp;This document discusses a set of =
extensions that fix many of the<br class=3D""> &nbsp;&nbsp;limitations =
of the ACL model as initially defined in RFC 8519.<br class=3D""><br =
class=3D""><br class=3D""><br class=3D""><br class=3D"">The IETF =
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class=3D"">_______________________________________________<br =
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href=3D"mailto:netmod@ietf.org" class=3D"">netmod@ietf.org</a><br =
class=3D"">https://www.ietf.org/mailman/listinfo/netmod<br =
class=3D""></div></div></blockquote></div><br class=3D""><div class=3D"">
<div dir=3D"auto" style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, =
0); letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
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break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D""><div class=3D"">Mahesh Jethanandani</div><div class=3D""><a =
href=3D"mailto:mjethanandani@gmail.com" =
class=3D"">mjethanandani@gmail.com</a></div><div class=3D""><br =
class=3D""></div></div><br class=3D"Apple-interchange-newline"></div><br =
class=3D"Apple-interchange-newline"><br =
class=3D"Apple-interchange-newline">
</div>
<br class=3D""></div></body></html>=

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From: tom petch <ietfc@btconnect.com>
To: Aihua Guo <aihuaguo.ietf@gmail.com>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] Clarification on the description for chassis and stack in RFC 8348
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/sZ0ouj9lGNh9C2FCw2Bu13ISKuU>
Subject: Re: [netmod] Clarification on the description for chassis and stack in RFC 8348
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From: netmod <netmod-bounces@ietf.org> on behalf of Aihua Guo <aihuaguo.iet=
f@gmail.com>=0A=
Sent: 13 October 2021 20:17=0A=
=0A=
Hi All,=0A=
=0A=
RFC 8348 defines chassis and stack as two identities for networking equipme=
nt. The description for chassis says that "Any class of physical component,=
 except a stack, may be contained within a chassis; a chassis may only be c=
ontained within a stack." First statement of this sentence seems to suggest=
 that a chassis (which is a component) can also be contained within a chass=
is, while the next statement, "a chassis may only be contained within a sta=
ck." seems to suggest that a chassis can be only contained within a stack a=
nd not within another chassis, which seems to contradict with the previous =
statement. So, which statement is correct?=0A=
=0A=
<tp>=0A=
I do not know what the authors had in mind but to me a chassis is clearly a=
 chassis and a stack a stack:-)=0A=
=0A=
A chassis is a frame, usually metal, often with PSU and perhaps managements=
 functions into which blades can be slotted.  Without at least one blade it=
 is usually not good for much except testing the management module although=
 that may well be a blade and not integral with the chassis.  A multi-proto=
col switch would be a likely example.  I have not seen a chassis within a c=
hassis.=0A=
=0A=
By contrast, a stack is made up of stackable elements, each of which is com=
plete in itself and could be used by itself as a one element stack but whic=
h also have in/out sockets which enable multiple elements to be integrated =
into a single functional element.  A LAN hub where each element supports 16=
 ports and eight can be stacked to form a 128 port hub would be an example.=
  If the elements are all connected together, I see a stack.  If they are p=
hysically co-located but function as several separate entities then I see s=
everal stacks but not  a stack within a stack.=0A=
=0A=
HTH=0A=
=0A=
Tom Petch=0A=
=0A=
 =0A=
Another point to clarify is that in the description for stack, "...a stack =
may be contained within another stack.  Only chassis components should be c=
ontained within a stack." Is it correct to understand that a stack can cont=
ain either another stack or a chassis, or both, but nothing else?=0A=
=0A=
I would appreciate the clarification.=0A=
=0A=
Thanks,=0A=
Aihua=0A=
=0A=
=0A=
=0A=
=0A=
=0A=


From nobody Wed Oct 20 05:50:54 2021
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Thread-Topic: [netmod] Clarification on the description for chassis and stack in RFC 8348
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/LUbnFgkRMMrKU7eUWUEhbM8zLlg>
Subject: Re: [netmod] Clarification on the description for chassis and stack in RFC 8348
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The confusion appears to stem from the exclusion of "chassis" in the first =
part of this sentence:

"Any class of physical component, except a stack, may be contained within a=
 chassis; a chassis may only be contained within a stack."

It takes a rather pedantic read of the text to suggest that "any class of p=
hysical component" may also include a chassis, but perhaps it is worth upda=
ting the text to specifically state "Any class of physical component, excep=
t a stack or a chassis, may be contained within a chassis".=20

Nesting a chassis within a chassis I don't see being useful to permit in pr=
actice/practically useful.=20

Nested stacking sounds plausible. 'A stack of stacks' reminds me of a few d=
esigns I've seen in the past (4-way Cisco VSS, perhaps?)=20

Regards,

Tom

My sincere apologies for Outlook.

-----Original Message-----
From: netmod <netmod-bounces@ietf.org> On Behalf Of tom petch
Sent: 20 October 2021 12:10
To: Aihua Guo <aihuaguo.ietf@gmail.com>; netmod@ietf.org
Subject: Re: [netmod] Clarification on the description for chassis and stac=
k in RFC 8348

From: netmod <netmod-bounces@ietf.org> on behalf of Aihua Guo <aihuaguo.iet=
f@gmail.com>
Sent: 13 October 2021 20:17

Hi All,

RFC 8348 defines chassis and stack as two identities for networking equipme=
nt. The description for chassis says that "Any class of physical component,=
 except a stack, may be contained within a chassis; a chassis may only be c=
ontained within a stack." First statement of this sentence seems to suggest=
 that a chassis (which is a component) can also be contained within a chass=
is, while the next statement, "a chassis may only be contained within a sta=
ck." seems to suggest that a chassis can be only contained within a stack a=
nd not within another chassis, which seems to contradict with the previous =
statement. So, which statement is correct?

<tp>
I do not know what the authors had in mind but to me a chassis is clearly a=
 chassis and a stack a stack:-)

A chassis is a frame, usually metal, often with PSU and perhaps managements=
 functions into which blades can be slotted.  Without at least one blade it=
 is usually not good for much except testing the management module although=
 that may well be a blade and not integral with the chassis.  A multi-proto=
col switch would be a likely example.  I have not seen a chassis within a c=
hassis.

By contrast, a stack is made up of stackable elements, each of which is com=
plete in itself and could be used by itself as a one element stack but whic=
h also have in/out sockets which enable multiple elements to be integrated =
into a single functional element.  A LAN hub where each element supports 16=
 ports and eight can be stacked to form a 128 port hub would be an example.=
  If the elements are all connected together, I see a stack.  If they are p=
hysically co-located but function as several separate entities then I see s=
everal stacks but not  a stack within a stack.

HTH

Tom Petch

=20
Another point to clarify is that in the description for stack, "...a stack =
may be contained within another stack.  Only chassis components should be c=
ontained within a stack." Is it correct to understand that a stack can cont=
ain either another stack or a chassis, or both, but nothing else?

I would appreciate the clarification.

Thanks,
Aihua






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From: Aihua Guo <aihuaguo.ietf@gmail.com>
Date: Wed, 20 Oct 2021 12:07:10 -0400
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Subject: Re: [netmod] Clarification on the description for chassis and stack in RFC 8348
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Hi Tom,

Thank you for the clarification.

In telecom there are also "shelves" mounted on racks. A shelf is a metal
frame with PSU and slots that can contain other cards. It is usually 1U-9U
in height. So it looks to me that a shelf is a type of chassis.

Now, there are usually subtended shelves that sit next to a main shelf and
connected by external cables. A subtended shelf (or subshelf) is also a
metal frame with PSU and slots, but it does not have its own control units
and instead is managed directly by the main shelf. If a subshelf is also
considered as a type of chassis, then it means that a chassis (shelf) could
contain another chassis (subshelf) as its child, and a subshelf has a shelf
as its parent.

Alternatively, it could be modeled by using a "stack" to group these
chassises together, but then to capture the parent-child relationship
between a shelf and a subshelf, it needs to create a stack that contains
both the main shelf and another stack which contains the subshelf. It
sounds a little redundant to me.

Thoughts are much appreciated.

Thanks,
Aihua


On Wed, Oct 20, 2021 at 8:51 AM <tom.2.hill=3D40bt.com@dmarc.ietf.org> wrot=
e:

> The confusion appears to stem from the exclusion of "chassis" in the firs=
t
> part of this sentence:
>
> "Any class of physical component, except a stack, may be contained within
> a chassis; a chassis may only be contained within a stack."
>
> It takes a rather pedantic read of the text to suggest that "any class of
> physical component" may also include a chassis, but perhaps it is worth
> updating the text to specifically state "Any class of physical component,
> except a stack or a chassis, may be contained within a chassis".
>
> Nesting a chassis within a chassis I don't see being useful to permit in
> practice/practically useful.
>
> Nested stacking sounds plausible. 'A stack of stacks' reminds me of a few
> designs I've seen in the past (4-way Cisco VSS, perhaps?)
>
> Regards,
>
> Tom
>
> My sincere apologies for Outlook.
>
> -----Original Message-----
> From: netmod <netmod-bounces@ietf.org> On Behalf Of tom petch
> Sent: 20 October 2021 12:10
> To: Aihua Guo <aihuaguo.ietf@gmail.com>; netmod@ietf.org
> Subject: Re: [netmod] Clarification on the description for chassis and
> stack in RFC 8348
>
> From: netmod <netmod-bounces@ietf.org> on behalf of Aihua Guo <
> aihuaguo.ietf@gmail.com>
> Sent: 13 October 2021 20:17
>
> Hi All,
>
> RFC 8348 defines chassis and stack as two identities for networking
> equipment. The description for chassis says that "Any class of physical
> component, except a stack, may be contained within a chassis; a chassis m=
ay
> only be contained within a stack." First statement of this sentence seems
> to suggest that a chassis (which is a component) can also be contained
> within a chassis, while the next statement, "a chassis may only be
> contained within a stack." seems to suggest that a chassis can be only
> contained within a stack and not within another chassis, which seems to
> contradict with the previous statement. So, which statement is correct?
>
> <tp>
> I do not know what the authors had in mind but to me a chassis is clearly
> a chassis and a stack a stack:-)
>
> A chassis is a frame, usually metal, often with PSU and perhaps
> managements functions into which blades can be slotted.  Without at least
> one blade it is usually not good for much except testing the management
> module although that may well be a blade and not integral with the
> chassis.  A multi-protocol switch would be a likely example.  I have not
> seen a chassis within a chassis.
>
> By contrast, a stack is made up of stackable elements, each of which is
> complete in itself and could be used by itself as a one element stack but
> which also have in/out sockets which enable multiple elements to be
> integrated into a single functional element.  A LAN hub where each elemen=
t
> supports 16 ports and eight can be stacked to form a 128 port hub would b=
e
> an example.  If the elements are all connected together, I see a stack.  =
If
> they are physically co-located but function as several separate entities
> then I see several stacks but not  a stack within a stack.
>
> HTH
>
> Tom Petch
>
>
> Another point to clarify is that in the description for stack, "...a stac=
k
> may be contained within another stack.  Only chassis components should be
> contained within a stack." Is it correct to understand that a stack can
> contain either another stack or a chassis, or both, but nothing else?
>
> I would appreciate the clarification.
>
> Thanks,
> Aihua
>
>
>
>
>
>
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
>
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etf.org%2Fmailman%2Flistinfo%2Fnetmod&amp;data=3D04%7C01%7Ctom.2.hill%40bt.=
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<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr">Hi Tom,=
<div><br></div><div>Thank you for the clarification.</div><div><br></div><d=
iv>In telecom there are also &quot;shelves&quot; mounted on racks. A shelf =
is a metal frame with PSU and slots that can contain other cards. It is usu=
ally 1U-9U in height. So it looks to me that a shelf is a type of chassis.=
=C2=A0</div><div><br></div><div>Now, there are usually subtended shelves th=
at sit next to a main shelf and connected by external cables. A subtended s=
helf (or subshelf) is also a metal frame with=C2=A0PSU and slots, but it do=
es not have its own control units and instead is managed directly by the ma=
in shelf. If a subshelf is also considered as a type of chassis, then it me=
ans that a chassis (shelf) could contain another chassis (subshelf) as its =
child, and a subshelf=C2=A0has a shelf as its parent.</div><div><br></div><=
div>Alternatively, it could be modeled by using a &quot;stack&quot; to grou=
p these chassises together, but then to capture the parent-child relationsh=
ip between a shelf and a subshelf, it needs to create a stack that contains=
 both the main shelf and another stack which contains the subshelf. It soun=
ds a little redundant to me.=C2=A0</div><div><br></div><div>Thoughts are mu=
ch appreciated.</div><div><br></div><div>Thanks,</div><div>Aihua=C2=A0</div=
><div><br></div></div></div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Wed, Oct 20, 2021 at 8:51 AM &lt;tom.2.hil=
l=3D<a href=3D"mailto:40bt.com@dmarc.ietf.org">40bt.com@dmarc.ietf.org</a>&=
gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">The c=
onfusion appears to stem from the exclusion of &quot;chassis&quot; in the f=
irst part of this sentence:<br>
<br>
&quot;Any class of physical component, except a stack, may be contained wit=
hin a chassis; a chassis may only be contained within a stack.&quot;<br>
<br>
It takes a rather pedantic read of the text to suggest that &quot;any class=
 of physical component&quot; may also include a chassis, but perhaps it is =
worth updating the text to specifically state &quot;Any class of physical c=
omponent, except a stack or a chassis, may be contained within a chassis&qu=
ot;. <br>
<br>
Nesting a chassis within a chassis I don&#39;t see being useful to permit i=
n practice/practically useful. <br>
<br>
Nested stacking sounds plausible. &#39;A stack of stacks&#39; reminds me of=
 a few designs I&#39;ve seen in the past (4-way Cisco VSS, perhaps?) <br>
<br>
Regards,<br>
<br>
Tom<br>
<br>
My sincere apologies for Outlook.<br>
<br>
-----Original Message-----<br>
From: netmod &lt;<a href=3D"mailto:netmod-bounces@ietf.org" target=3D"_blan=
k">netmod-bounces@ietf.org</a>&gt; On Behalf Of tom petch<br>
Sent: 20 October 2021 12:10<br>
To: Aihua Guo &lt;<a href=3D"mailto:aihuaguo.ietf@gmail.com" target=3D"_bla=
nk">aihuaguo.ietf@gmail.com</a>&gt;; <a href=3D"mailto:netmod@ietf.org" tar=
get=3D"_blank">netmod@ietf.org</a><br>
Subject: Re: [netmod] Clarification on the description for chassis and stac=
k in RFC 8348<br>
<br>
From: netmod &lt;<a href=3D"mailto:netmod-bounces@ietf.org" target=3D"_blan=
k">netmod-bounces@ietf.org</a>&gt; on behalf of Aihua Guo &lt;<a href=3D"ma=
ilto:aihuaguo.ietf@gmail.com" target=3D"_blank">aihuaguo.ietf@gmail.com</a>=
&gt;<br>
Sent: 13 October 2021 20:17<br>
<br>
Hi All,<br>
<br>
RFC 8348 defines chassis and stack as two identities for networking equipme=
nt. The description for chassis says that &quot;Any class of physical compo=
nent, except a stack, may be contained within a chassis; a chassis may only=
 be contained within a stack.&quot; First statement of this sentence seems =
to suggest that a chassis (which is a component) can also be contained with=
in a chassis, while the next statement, &quot;a chassis may only be contain=
ed within a stack.&quot; seems to suggest that a chassis can be only contai=
ned within a stack and not within another chassis, which seems to contradic=
t with the previous statement. So, which statement is correct?<br>
<br>
&lt;tp&gt;<br>
I do not know what the authors had in mind but to me a chassis is clearly a=
 chassis and a stack a stack:-)<br>
<br>
A chassis is a frame, usually metal, often with PSU and perhaps managements=
 functions into which blades can be slotted.=C2=A0 Without at least one bla=
de it is usually not good for much except testing the management module alt=
hough that may well be a blade and not integral with the chassis.=C2=A0 A m=
ulti-protocol switch would be a likely example.=C2=A0 I have not seen a cha=
ssis within a chassis.<br>
<br>
By contrast, a stack is made up of stackable elements, each of which is com=
plete in itself and could be used by itself as a one element stack but whic=
h also have in/out sockets which enable multiple elements to be integrated =
into a single functional element.=C2=A0 A LAN hub where each element suppor=
ts 16 ports and eight can be stacked to form a 128 port hub would be an exa=
mple.=C2=A0 If the elements are all connected together, I see a stack.=C2=
=A0 If they are physically co-located but function as several separate enti=
ties then I see several stacks but not=C2=A0 a stack within a stack.<br>
<br>
HTH<br>
<br>
Tom Petch<br>
<br>
<br>
Another point to clarify is that in the description for stack, &quot;...a s=
tack may be contained within another stack.=C2=A0 Only chassis components s=
hould be contained within a stack.&quot; Is it correct to understand that a=
 stack can contain either another stack or a chassis, or both, but nothing =
else?<br>
<br>
I would appreciate the clarification.<br>
<br>
Thanks,<br>
Aihua<br>
<br>
<br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
netmod mailing list<br>
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 target=3D"_blank">https://www.ietf.org/mailman/listinfo/netmod</a><br>
</blockquote></div></div>

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Thread-Topic: [netmod] Clarification on the description for chassis and stack in RFC 8348
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/VZ5MuqYNGGBPvJBIetn9FdAInrI>
Subject: Re: [netmod] Clarification on the description for chassis and stack in RFC 8348
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From: netmod <netmod-bounces@ietf.org> on behalf of tom.2.hill=3D40bt.com@d=
marc.ietf.org <tom.2.hill=3D40bt.com@dmarc.ietf.org>=0A=
Sent: 20 October 2021 13:50=0A=
=0A=
The confusion appears to stem from the exclusion of "chassis" in the first =
part of this sentence:=0A=
=0A=
"Any class of physical component, except a stack, may be contained within a=
 chassis; a chassis may only be contained within a stack."=0A=
=0A=
<tp>=0A=
=0A=
Yes.  I looked back and the text has been the same for decades so clearly t=
he authors are happy with this.  My initial take was on the common sense (t=
o me) usage of chassis but this is a bit different.=0A=
=0A=
Perhaps raise an erratum which would likely get the attention of the author=
s and the AD with OLD and NEW as you suggest.=0A=
=0A=
Tom Petch=0A=
=0A=
It takes a rather pedantic read of the text to suggest that "any class of p=
hysical component" may also include a chassis, but perhaps it is worth upda=
ting the text to specifically state "Any class of physical component, excep=
t a stack or a chassis, may be contained within a chassis".=0A=
=0A=
Nesting a chassis within a chassis I don't see being useful to permit in pr=
actice/practically useful.=0A=
=0A=
Nested stacking sounds plausible. 'A stack of stacks' reminds me of a few d=
esigns I've seen in the past (4-way Cisco VSS, perhaps?)=0A=
=0A=
Regards,=0A=
=0A=
Tom=0A=
=0A=
My sincere apologies for Outlook.=0A=
=0A=
-----Original Message-----=0A=
From: netmod <netmod-bounces@ietf.org> On Behalf Of tom petch=0A=
Sent: 20 October 2021 12:10=0A=
To: Aihua Guo <aihuaguo.ietf@gmail.com>; netmod@ietf.org=0A=
Subject: Re: [netmod] Clarification on the description for chassis and stac=
k in RFC 8348=0A=
=0A=
From: netmod <netmod-bounces@ietf.org> on behalf of Aihua Guo <aihuaguo.iet=
f@gmail.com>=0A=
Sent: 13 October 2021 20:17=0A=
=0A=
Hi All,=0A=
=0A=
RFC 8348 defines chassis and stack as two identities for networking equipme=
nt. The description for chassis says that "Any class of physical component,=
 except a stack, may be contained within a chassis; a chassis may only be c=
ontained within a stack." First statement of this sentence seems to suggest=
 that a chassis (which is a component) can also be contained within a chass=
is, while the next statement, "a chassis may only be contained within a sta=
ck." seems to suggest that a chassis can be only contained within a stack a=
nd not within another chassis, which seems to contradict with the previous =
statement. So, which statement is correct?=0A=
=0A=
<tp>=0A=
I do not know what the authors had in mind but to me a chassis is clearly a=
 chassis and a stack a stack:-)=0A=
=0A=
A chassis is a frame, usually metal, often with PSU and perhaps managements=
 functions into which blades can be slotted.  Without at least one blade it=
 is usually not good for much except testing the management module although=
 that may well be a blade and not integral with the chassis.  A multi-proto=
col switch would be a likely example.  I have not seen a chassis within a c=
hassis.=0A=
=0A=
By contrast, a stack is made up of stackable elements, each of which is com=
plete in itself and could be used by itself as a one element stack but whic=
h also have in/out sockets which enable multiple elements to be integrated =
into a single functional element.  A LAN hub where each element supports 16=
 ports and eight can be stacked to form a 128 port hub would be an example.=
  If the elements are all connected together, I see a stack.  If they are p=
hysically co-located but function as several separate entities then I see s=
everal stacks but not  a stack within a stack.=0A=
=0A=
HTH=0A=
=0A=
Tom Petch=0A=
=0A=
=0A=
Another point to clarify is that in the description for stack, "...a stack =
may be contained within another stack.  Only chassis components should be c=
ontained within a stack." Is it correct to understand that a stack can cont=
ain either another stack or a chassis, or both, but nothing else?=0A=
=0A=
I would appreciate the clarification.=0A=
=0A=
Thanks,=0A=
Aihua=0A=
=0A=
=0A=
=0A=
=0A=
=0A=
=0A=
_______________________________________________=0A=
netmod mailing list=0A=
netmod@ietf.org=0A=
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From: tom petch <ietfc@btconnect.com>
To: Aihua Guo <aihuaguo.ietf@gmail.com>, "tom.2.hill=40bt.com@dmarc.ietf.org" <tom.2.hill=40bt.com@dmarc.ietf.org>
CC: "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] Clarification on the description for chassis and stack in RFC 8348
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Date: Fri, 22 Oct 2021 11:14:07 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/la_YDuWy-tWYDcWpLxbIh2SwaZA>
Subject: Re: [netmod] Clarification on the description for chassis and stack in RFC 8348
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From: netmod <netmod-bounces@ietf.org> on behalf of Aihua Guo <aihuaguo.iet=
f@gmail.com>=0A=
Sent: 20 October 2021 17:07=0A=
=0A=
Hi Tom,=0A=
=0A=
Thank you for the clarification.=0A=
=0A=
In telecom there are also "shelves" mounted on racks. A shelf is a metal fr=
ame with PSU and slots that can contain other cards. It is usually 1U-9U in=
 height. So it looks to me that a shelf is a type of chassis.=0A=
=0A=
Now, there are usually subtended shelves that sit next to a main shelf and =
connected by external cables. A subtended shelf (or subshelf) is also a met=
al frame with PSU and slots, but it does not have its own control units and=
 instead is managed directly by the main shelf. If a subshelf is also consi=
dered as a type of chassis, then it means that a chassis (shelf) could cont=
ain another chassis (subshelf) as its child, and a subshelf has a shelf as =
its parent.=0A=
=0A=
Alternatively, it could be modeled by using a "stack" to group these chassi=
ses together, but then to capture the parent-child relationship between a s=
helf and a subshelf, it needs to create a stack that contains both the main=
 shelf and another stack which contains the subshelf. It sounds a little re=
dundant to me.=0A=
=0A=
Thoughts are much appreciated.=0A=
=0A=
<tp>=0A=
=0A=
Yes, I am well familiar with telecoms racks and with cabling racks.  With c=
abling racks, then I think that there is too little logic to qualify for th=
is model and I wonder if the same is true for subshelves which is something=
 I am not familiar with.   The model, like much of the IETF, is aimed at br=
idges, switches and routers and higher level protocol devices so if the sub=
tended modules do not have their own control units then I would be inclined=
 not to see them as chassis.  I agree with Tom that the text as written doe=
s not cater for a chassis contained within  a chassis and so that would be =
a technical change to the RFC which would call for a fresh RFC whereas the =
change Tom suggests is editorial IMHO and so could be made by an erratum to=
 the RFC.=0A=
=0A=
Tom Petch=0A=
=0A=
Thanks,=0A=
Aihua=0A=
=0A=
=0A=
On Wed, Oct 20, 2021 at 8:51 AM <tom.2.hill=3D40bt.com@dmarc.ietf.org<mailt=
o:40bt.com@dmarc.ietf.org>> wrote:=0A=
The confusion appears to stem from the exclusion of "chassis" in the first =
part of this sentence:=0A=
=0A=
"Any class of physical component, except a stack, may be contained within a=
 chassis; a chassis may only be contained within a stack."=0A=
=0A=
It takes a rather pedantic read of the text to suggest that "any class of p=
hysical component" may also include a chassis, but perhaps it is worth upda=
ting the text to specifically state "Any class of physical component, excep=
t a stack or a chassis, may be contained within a chassis".=0A=
=0A=
Nesting a chassis within a chassis I don't see being useful to permit in pr=
actice/practically useful.=0A=
=0A=
Nested stacking sounds plausible. 'A stack of stacks' reminds me of a few d=
esigns I've seen in the past (4-way Cisco VSS, perhaps?)=0A=
=0A=
Regards,=0A=
=0A=
Tom=0A=
=0A=
My sincere apologies for Outlook.=0A=
=0A=
-----Original Message-----=0A=
From: netmod <netmod-bounces@ietf.org<mailto:netmod-bounces@ietf.org>> On B=
ehalf Of tom petch=0A=
Sent: 20 October 2021 12:10=0A=
To: Aihua Guo <aihuaguo.ietf@gmail.com<mailto:aihuaguo.ietf@gmail.com>>; ne=
tmod@ietf.org<mailto:netmod@ietf.org>=0A=
Subject: Re: [netmod] Clarification on the description for chassis and stac=
k in RFC 8348=0A=
=0A=
From: netmod <netmod-bounces@ietf.org<mailto:netmod-bounces@ietf.org>> on b=
ehalf of Aihua Guo <aihuaguo.ietf@gmail.com<mailto:aihuaguo.ietf@gmail.com>=
>=0A=
Sent: 13 October 2021 20:17=0A=
=0A=
Hi All,=0A=
=0A=
RFC 8348 defines chassis and stack as two identities for networking equipme=
nt. The description for chassis says that "Any class of physical component,=
 except a stack, may be contained within a chassis; a chassis may only be c=
ontained within a stack." First statement of this sentence seems to suggest=
 that a chassis (which is a component) can also be contained within a chass=
is, while the next statement, "a chassis may only be contained within a sta=
ck." seems to suggest that a chassis can be only contained within a stack a=
nd not within another chassis, which seems to contradict with the previous =
statement. So, which statement is correct?=0A=
=0A=
<tp>=0A=
I do not know what the authors had in mind but to me a chassis is clearly a=
 chassis and a stack a stack:-)=0A=
=0A=
A chassis is a frame, usually metal, often with PSU and perhaps managements=
 functions into which blades can be slotted.  Without at least one blade it=
 is usually not good for much except testing the management module although=
 that may well be a blade and not integral with the chassis.  A multi-proto=
col switch would be a likely example.  I have not seen a chassis within a c=
hassis.=0A=
=0A=
By contrast, a stack is made up of stackable elements, each of which is com=
plete in itself and could be used by itself as a one element stack but whic=
h also have in/out sockets which enable multiple elements to be integrated =
into a single functional element.  A LAN hub where each element supports 16=
 ports and eight can be stacked to form a 128 port hub would be an example.=
  If the elements are all connected together, I see a stack.  If they are p=
hysically co-located but function as several separate entities then I see s=
everal stacks but not  a stack within a stack.=0A=
=0A=
HTH=0A=
=0A=
Tom Petch=0A=
=0A=
=0A=
Another point to clarify is that in the description for stack, "...a stack =
may be contained within another stack.  Only chassis components should be c=
ontained within a stack." Is it correct to understand that a stack can cont=
ain either another stack or a chassis, or both, but nothing else?=0A=
=0A=
I would appreciate the clarification.=0A=
=0A=
Thanks,=0A=
Aihua=0A=
=0A=
=0A=
=0A=
=0A=
=0A=
=0A=
_______________________________________________=0A=
netmod mailing list=0A=
netmod@ietf.org<mailto:netmod@ietf.org>=0A=
https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.iet=
f.org%2Fmailman%2Flistinfo%2Fnetmod&amp;data=3D04%7C01%7Ctom.2.hill%40bt.co=
m%7Ceceaf59456654bcbc2cb08d993ba4469%7Ca7f356889c004d5eba4129f146377ab0%7C0=
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_______________________________________________=0A=
netmod mailing list=0A=
netmod@ietf.org<mailto:netmod@ietf.org>=0A=
https://www.ietf.org/mailman/listinfo/netmod=0A=


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Subject: Re: [netmod] Clarification on the description for chassis and stack in RFC 8348
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Hi -

On 2021-10-22 4:14 AM, tom petch wrote:
...
> Yes, I am well familiar with telecoms racks and with cabling racks.  With cabling racks, then I think that there is too little logic to qualify for this model and I wonder if the same is true for subshelves which is something I am not familiar with.   The model, like much of the IETF, is aimed at bridges, switches and routers and higher level protocol devices so if the subtended modules do not have their own control units then I would be inclined not to see them as chassis.  I agree with Tom that the text as written does not cater for a chassis contained within  a chassis and so that would be a technical change to the RFC which would call for a fresh RFC whereas the change Tom suggests is editorial IMHO and so could be made by an erratum to the RFC.

Some products I worked on (both data and voice processing) had
considerable intelligence and configuration in the subshelves.
But that was long ago, and we were using proprietary methods or
CMIP to manage them.

Randy


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Subject: [netmod] I-D Action: draft-ietf-netmod-geo-location-11.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Network Modeling WG of the IETF.

        Title           : A YANG Grouping for Geographic Locations
        Author          : Christian Hopps
	Filename        : draft-ietf-netmod-geo-location-11.txt
	Pages           : 26
	Date            : 2021-10-24

Abstract:
   This document defines a generic geographical location YANG grouping.
   The geographical location grouping is intended to be used in YANG
   models for specifying a location on or in reference to Earth or any
   other astronomical object.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-netmod-geo-location/

There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-netmod-geo-location-11.html

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-geo-location-11


Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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From nobody Mon Oct 25 06:52:24 2021
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Network Modeling WG of the IETF.

        Title           : YANG Packages
        Authors         : Robert Wilton
                          Reshad Rahman
                          Joe Clarke
                          Jason Sterne
                          Bo Wu
	Filename        : draft-ietf-netmod-yang-packages-02.txt
	Pages           : 54
	Date            : 2021-10-25

Abstract:
   This document defines YANG packages, a versioned organizational
   structure holding a set of related YANG modules that collectively
   define a YANG schema.  It describes how packages: are represented on
   a server, can be defined in offline YANG instance data files, and can
   be used to define the schema associated with YANG instance data
   files.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-packages/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-netmod-yang-packages-02

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From nobody Mon Oct 25 11:30:59 2021
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Network Modeling WG of the IETF.

        Title           : Updated YANG Module Revision Handling
        Authors         : Robert Wilton
                          Reshad Rahman
                          Balazs Lengyel
                          Joe Clarke
                          Jason Sterne
	Filename        : draft-ietf-netmod-yang-module-versioning-04.txt
	Pages           : 41
	Date            : 2021-10-25

Abstract:
   This document specifies a new YANG module update procedure that can
   document when non-backwards-compatible changes have occurred during
   the evolution of a YANG module.  It extends the YANG import statement
   with an earliest revision filter to better represent inter-module
   dependencies.  It provides guidelines for managing the lifecycle of
   YANG modules and individual schema nodes.  It provides a mechanism,
   via the revision-label YANG extension, to specify a revision
   identifier for YANG modules and submodules.  This document updates
   RFC 7950, RFC 6020, RFC 8407 and RFC 8525.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-netmod-yang-module-versioning/

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https://datatracker.ietf.org/doc/html/draft-ietf-netmod-yang-module-versioning-04

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Network Modeling WG of the IETF.

        Title           : YANG Semantic Versioning
        Authors         : Joe Clarke
                          Robert Wilton
                          Reshad Rahman
                          Balazs Lengyel
                          Jason Sterne
                          Benoit Claise
	Filename        : draft-ietf-netmod-yang-semver-04.txt
	Pages           : 24
	Date            : 2021-10-25

Abstract:
   This document specifies a scheme and guidelines for applying an
   extended set of semantic versioning rules to revisions of YANG
   artifacts (e.g., modules and packages).  Additionally, this document
   defines an RFCAAAA-compliant revision-label-scheme for this YANG
   semantic versioning scheme.


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From: "Joe Clarke (jclarke)" <jclarke@cisco.com>
To: "Rob Wilton (rwilton)" <rwilton=40cisco.com@dmarc.ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: Revision-labels within filenames
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Date: Tue, 26 Oct 2021 13:01:16 +0000
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Subject: Re: [netmod] Revision-labels within filenames
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Subject: [netmod] Draft IETF112 Agenda Available
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All,

A draft agenda for our virtual 112 meeting has been posted.

Please take a look and let us know if any changes are needed.

https://datatracker.ietf.org/meeting/112/materials/agenda-112-netmod

Presenters:
Please provide your slides to the chairs no later than the Tuesday
before our meeting.

Authors of WG documents:
If you are not on the agenda, please send a update on status and
plans for the document no later than Friday November 5.

Thank you!
Lou (Kent and Joel)

Some session information:

Thursday, November 11 --   UTC: 14:30-15:30 (Session II)

    Session material:
    https://datatracker.ietf.org/meeting/112/session/netmod
    ICS: https://datatracker.ietf.org/meeting/112/sessions/netmod.ics
    MeetEcho: https://meetings.conf.meetecho.com/ietf112/?group=3Dnetmod
    Jabber:         xmpp:netmod@jabber.ietf.org?join
    CodiMD:        https://codimd.ietf.org/notes-ietf-112-netmod


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<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<div>All,</div>
<div><br>
</div>
<div>A draft agenda for our virtual 112 meeting has been posted.</div>
<div><br>
</div>
<div>Please take a look and let us know if any changes are needed.</div>
<div><br>
</div>
<div><a href=3D"https://datatracker.ietf.org/meeting/112/materials/agenda-1=
12-netmod" id=3D"LPlnk852903">https://datatracker.ietf.org/meeting/112/mate=
rials/agenda-112-netmod</a></div>
<div><br>
</div>
<div>Presenters:</div>
<div>Please provide your slides to the chairs no later than the Tuesday</di=
v>
<div>before our meeting.</div>
<div><br>
</div>
<div>Authors of WG documents:</div>
<div>If you are not on the agenda, please send a update on status and</div>
<div>plans for the document no later than Friday November 5.</div>
<div><br>
</div>
<div>Thank you!</div>
<div>Lou (Kent and Joel)</div>
<div><br>
</div>
<div>Some session information:</div>
<div><br>
</div>
<div>Thursday, November 11 -- &nbsp; UTC: 14:30-15:30 (Session II)</div>
<div><br>
</div>
<div>&nbsp; &nbsp; Session material: </div>
<div>&nbsp; &nbsp; <a href=3D"https://datatracker.ietf.org/meeting/112/sess=
ion/netmod" id=3D"LPlnk989922">
https://datatracker.ietf.org/meeting/112/session/netmod</a></div>
<div>&nbsp; &nbsp; ICS: <a href=3D"https://datatracker.ietf.org/meeting/112=
/sessions/netmod.ics" id=3D"LPlnk360165">
https://datatracker.ietf.org/meeting/112/sessions/netmod.ics</a></div>
<div>&nbsp; &nbsp; MeetEcho: https://meetings.conf.meetecho.com/ietf112/?gr=
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etf.org?join</div>
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From: Qin Wu <bill.wu@huawei.com>
To: "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: Status Update of draft-ietf-netmod-node-tags
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Current Status:
   * The updated revision -03 posted on May 12,2021
             > Add five Metric tags;
                   > Separate use cases as separate section;
                   > Security section enhancement;
            > Editorial fixes;
Open Issues:
* None.

Next Steps:
* Update the document to align with Module tag RFC8819
* Remove Histogram metric type tag from metric type tags.
* Update targeted data object collection example.
* Get more reviews.
* Working Group Last Call after completing above.

--_000_5263c6779ea64f3e96ede5f0a672723bhuaweicom_
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<p class=3D"MsoNormal"><span lang=3D"EN-US">Current Status:<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;&nbsp; * The updated revi=
sion -03 posted on May 12,2021<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &gt; Add five Metric tags;<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; &gt; Separate use cases as separate section;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; &gt; Security section enhancement;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&gt; Editorial fixes;<o:p></o:p></span>=
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<p class=3D"MsoNormal"><span lang=3D"EN-US">Next Steps:<o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"text-indent:15.75pt"><span lang=3D"EN-US">*=
 Update the document to align with Module tag RFC8819<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:15.75pt"><span lang=3D"EN-US">*=
 Remove Histogram metric type tag from metric type tags.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"text-indent:15.75pt"><span lang=3D"EN-US">*=
 Update targeted data object collection example.
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:15.75pt"><span lang=3D"EN-US">*=
 Get more reviews.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:15.75pt"><span lang=3D"EN-US">*=
 Working Group Last Call after completing above.<o:p></o:p></span></p>
</div>
</body>
</html>

--_000_5263c6779ea64f3e96ede5f0a672723bhuaweicom_--

