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To: "Aitken, Paul" <paitken@ciena.com>, "Joe Clarke (jclarke)"
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CC: "ipfix@ietf.org" <ipfix@ietf.org>
Thread-Topic: octetArray/hextetArray/32tetArray RE: Re: [IPFIX] WG LC: IPFIX
 documents
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Date: Fri, 23 Feb 2024 14:59:57 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ipfix/WETCdTkHUs9inQqYYPvAUlB4JvY>
Subject: Re: [IPFIX] octetArray/hextetArray/32tetArray RE: Re: WG LC: IPFIX
 documents
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Hi Paul,

Do you still think there is an issue with the design? Thanks.

Cheers,
Med

De : BOUCADAIR Mohamed INNOV/NET
Envoy=E9 : mardi 23 janvier 2024 14:56
=C0 : 'Aitken, Paul' <paitken@ciena.com>; Joe Clarke (jclarke) <jclarke=3D4=
0cisco.com@dmarc.ietf.org>; opsawg@ietf.org
Cc : ipfix@ietf.org
Objet : octetArray/hextetArray/32tetArray RE: Re: [IPFIX] WG LC: IPFIX docu=
ments

Hi Paul,

(restricted the distribution lists to OPSAWG and IPFIX)

The octetArray type is especially confusing as these are really hextetArray=
s.

[Med] Not sure we need a new data type here as octeArray is defined as foll=
ows:
   The octetArray data type has no encoding rules; it represents a raw
   array of zero or more octets, with the interpretation of the octets
   defined in the Information Element definition.

The draft proposes the encoding not of octets, but of 16-bit values. Theref=
ore it's not an "array of zero or more octets" but rather, an "array of zer=
o or more hextets".

[Med] I was assuming that =ABinterpretation of the octets defined in the In=
formation Element definition" in the excerpt is not restrictive and leave i=
t to the definition of the IE to determine how to interpret the octets (inc=
luding when grouping them into 16 bits, 32 bits, etc.). Given that interpre=
ting the data requires anyway digesting the structure in the definition not=
 only the abstract data type, I thought that we don't need to define new ty=
pes for specific octet- blocks, but I may be mistaken.
___________________________________________________________________________=
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US">Hi Paul,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US">Do you still think there is an is=
sue with the design? Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US">Med<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b>De&nbsp;:</b> BOUCADAIR Mohamed INNOV/NET <br>
<b>Envoy=E9&nbsp;:</b> mardi 23 janvier 2024 14:56<br>
<b>=C0&nbsp;:</b> 'Aitken, Paul' &lt;paitken@ciena.com&gt;; Joe Clarke (jcl=
arke) &lt;jclarke=3D40cisco.com@dmarc.ietf.org&gt;; opsawg@ietf.org<br>
<b>Cc&nbsp;:</b> ipfix@ietf.org<br>
<b>Objet&nbsp;:</b> octetArray/hextetArray/32tetArray RE: Re: [IPFIX] WG LC=
: IPFIX documents<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US">Hi Paul,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US">(restricted the distribution list=
s to OPSAWG and IPFIX)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span lang=3D"EN-US" style=3D"color:#204A87">The octetArray type is espe=
cially confusing as these are really hextetArrays.<br>
<br>
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><b><i><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;"=
>[Med] Not sure we need a new data type here as octeArray is defined as fol=
lows:</span></i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:4.6pt">
<b><i><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;">&n=
bsp;&nbsp; The octetArray data type has no encoding rules; it represents a =
raw</span></i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:4.6pt">
<b><i><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;">&n=
bsp;&nbsp; array of zero or more octets, with the interpretation of the oct=
ets</span></i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><b><i><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;"=
>&nbsp;&nbsp; defined in the Information Element definition.</span></i></b>=
<o:p></o:p></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><br>
<span lang=3D"EN-US">The draft proposes the encoding not of octets, but of =
16-bit values.
</span>Therefore it's not an &quot;array of zero or more octets&quot; but r=
ather, an &quot;array of zero or more hextets&quot;.<o:p></o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-family:&quot;Courier New&q=
uot;"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:9.2pt">
<b><i><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;">[M=
ed] I was assuming that =ABinterpretation of the octets defined in the Info=
rmation Element definition&#8221; in the excerpt is not restrictive and lea=
ve it to the definition of the IE to determine how to
 interpret the octets (including when grouping them into 16 bits, 32 bits, =
etc.). Given that interpreting the data requires anyway digesting the struc=
ture in the definition not only the abstract data type, I thought that we d=
on&#8217;t need to define new types for
 specific octet- blocks, but I may be mistaken.<o:p></o:p></span></i></b></=
p>
</div>
</div>
</div>
<pre>_________________<wbr>______________________________<wbr>_____________=
_________________<wbr>______________________________<wbr>_
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 ce message par erreur, veuillez le signaler
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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This message and its attachments may contain confidential or privileged inf=
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