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<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Scott,<o:p></o:p></span></a></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks for the great reply. I agree with a lot of what you are saying.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I guess I’m stuck on the idea that this doesn’t belong in ARIN policy. As you well note, ARIN policy is reflecting what has been the operational reality for
a while now. And as you state, we could keep changing the policy to match whatever happens in the future. But I guess I don’t feel that’s necessary; I feel that ARIN policy should be agnostic on prefix size. Hence my proposal.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I look forward to discussing solutions in Chicago. :)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">David R Huberman<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Microsoft Corporation<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Senior IT/OPS Program Manager (GFS)<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> Scott Leibrand [mailto:scottleibrand@gmail.com]
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<b>Sent:</b> Wednesday, March 19, 2014 11:52 AM<br>
<b>To:</b> David Huberman<br>
<b>Cc:</b> ARIN-PPML List<br>
<b>Subject:</b> Re: [arin-ppml] 2014-3 Remove 8.2/8.3/8.4 Minimum IPv4 Block Size Requirements<o:p></o:p></span></p>
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<p class="MsoNormal">On Wed, Mar 19, 2014 at 11:34 AM, David Huberman <<a href="mailto:David.Huberman@microsoft.com" target="_blank">David.Huberman@microsoft.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">> But regardless of the legal piece, I see no upside, and quite a bit of downside, to allowing IPv4 /32 transfers.<o:p></o:p></p>
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<p class="MsoNormal">Please articulate the "quite a bit of downside". If we ignore the legal piece of your argument, as you said to, what are the problems with /32 transfers to the technical operations of the internet? I've only seen the legal argument in
your replies so far, hence my request.<br>
<br>
Also, I believe ARIN is the wrong place for such constraints. I believe operators should make the decision on such matters - not central numbers registries which suffer from very very low participation. You can choose to reply to that or not, of course, but
I think it's very germane to the meat of this proposal: why does ARIN get to set this basement???<o:p></o:p></p>
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<p class="MsoNormal">Ok, setting aside the Legal thing (based on John's reply), I see this as mostly an expectations and externalities thing. Right now, I can make any size BGP announcement I want to my peers (as Marty pointed out), and that works fine. But
no one is *expecting* me to accept IPv4 /32s via my peers and transit providers from some unrelated entity across the country/world.<o:p></o:p></p>
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<p class="MsoNormal">I think ARIN policy needs to be in line with what operators are doing (or will soon want to do). I think removing minimum transfer sizes entirely would act as a forcing function that moves us too far down the "you must route this" path.
What is actually needed in the next few years is to be able to transfer /25s and maybe even /28s, not /32s.<o:p></o:p></p>
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<p class="MsoNormal">Where ARIN is telling operators they can't do what they want, I would agree with you that we should stop doing that. But AFAICT no operators actually want to transfer and try to get everyone to globally route IPv4 /32s, so ARIN's policy
here is just reflecting reality.<o:p></o:p></p>
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<p class="MsoNormal">-Scott<o:p></o:p></p>
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