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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif">Dear RIPE members and community,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<h1 style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;line-height:15.6pt;background:white">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US;font-weight:normal">We have come across a question of correct interpretation for “utilization” wthin´the current “IPv6 Address Allocation and Assignment Policy“
RIPE-738 document:<o:p></o:p></span></h1>
<h4 style="mso-margin-top-alt:9.0pt;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;mso-line-height-alt:15.6pt;background:white">
<span lang="EN-US" style="font-size:18.0pt;font-family:"Helvetica",sans-serif;color:#58595B;font-style:normal"><o:p> </o:p></span></h4>
<h4 style="mso-margin-top-alt:9.0pt;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;mso-line-height-alt:15.6pt;background:white">
<span lang="EN-US" style="font-size:18.0pt;font-family:"Helvetica",sans-serif;color:#58595B;font-style:normal">5.2.2. Applied HD-Ratio<o:p></o:p></span></h4>
<p style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;background:white;box-sizing: border-box;max-width: 700px;font-variant-ligatures: normal;font-variant-caps: normal;orphans: 2;text-align:start;widows: 2;-webkit-text-stroke-width: 0px;text-decoration-style: initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#333333">The HD-Ratio value of 0.94 is adopted as indicating an acceptable address utilisation for justifying the allocation of additional address space.<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;background:white">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#333333">Appendix A provides a table showing
<u>the number of assignments that are necessary to achieve an acceptable utilisation</u> value for a given address block size.<o:p></o:p></span></p>
<h1 style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;line-height:15.6pt;background:white">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US;font-weight:normal">[…]<o:p></o:p></span></h1>
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<span lang="EN-US" style="font-size:18.0pt;font-family:"Helvetica",sans-serif;color:#58595B">10. Appendix A: HD-Ratio<o:p></o:p></span></h2>
<p style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;background:white;box-sizing: border-box;max-width: 700px;font-variant-ligatures: normal;font-variant-caps: normal;orphans: 2;text-align:start;widows: 2;-webkit-text-stroke-width: 0px;text-decoration-style: initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#333333">The utilisation threshold T, expressed as a number of individual /56 prefixes
<u>to be allocated from IPv6 prefix P</u>, can be calculated as:<o:p></o:p></span></p>
<div style="border:solid #CCCCCC 1.0pt;padding:7.0pt 7.0pt 7.0pt 7.0pt">
<pre style="margin-bottom:7.5pt;background:whitesmoke;box-sizing: border-box;overflow-wrap: break-word;border-radius: 4px;white-space:pre-wrap;font-variant-ligatures: normal;font-variant-caps: normal;orphans: 2;text-align:start;widows: 2;-webkit-text-stroke-width: 0px;text-decoration-style: initial;text-decoration-color: initial;overflow:auto;word-spacing:0px"><span lang="EN-US" style="font-family:Consolas;color:#333333">T = 2</span><sup><span lang="EN-US" style="font-size:7.5pt;font-family:Consolas;color:#333333">((56-P)*HD)</span></sup><span lang="EN-US" style="font-family:Consolas;color:#333333"><o:p></o:p></span></pre>
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<p style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;background:white;box-sizing: border-box;max-width: 700px;font-variant-ligatures: normal;font-variant-caps: normal;orphans: 2;text-align:start;widows: 2;-webkit-text-stroke-width: 0px;text-decoration-style: initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#333333">Thus, the utilisation threshold for an LIR requesting subsequent allocation of IPv6 address block is specified as a function of the prefix size and target HD ratio.
<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;background:white">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#333333">This utilisation refers to the use of /56s as an efficiency measurement unit, and does not refer to the utilisation of addresses within those End Sites.
<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;background:white">
<u><span lang="EN-US" style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#333333">It is an address allocation utilisation ratio and not an address assignment utilisation ratio.<o:p></o:p></span></u></p>
<h1 style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;line-height:15.6pt;background:white">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US;font-weight:normal">[…]<o:p></o:p></span></h1>
<h1 style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:9.0pt;margin-left:0cm;line-height:15.6pt;background:white">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US;font-weight:normal"><o:p> </o:p></span></h1>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif">The two underlined sentences seem to contradict each other.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif">For a correct interpretation and calculation of the HD-Ratio/Utilization-Threshold (T) for IPv6-subsequent block eligibility, what is now correct “allocation” or
“assignment” ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif">In the LIR-Portal there is an %-indication for “my own resources” which soley refers to assignments within a specific block. Allocations seem not to be considered.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif">What is the correct way to calculcate the utilization?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;mso-fareast-language:DE">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;mso-fareast-language:DE">on behalf<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;mso-fareast-language:DE">Kurt Kayser<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;mso-fareast-language:DE">_______________________<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;mso-fareast-language:DE">Kurt Kayser Konsultation<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="mso-fareast-language:DE">im Auftrag des Referates SK 4 - Konzeption/ Local Internet Registry<o:p></o:p></span></p>
<p class="MsoNormal"><span style="background:white;mso-fareast-language:DE">Bundesanstalt für den Digitalfunk der Behörden und Organisationen mit Sicherheitsaufgaben (BDBOS)</span><span style="mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:#1F497D;mso-fareast-language:DE">Telefon: +49 (0) 1575-2634020</span><span style="font-size:12.0pt;color:black;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:#1F497D;mso-fareast-language:DE">E-Mail: <a href="mailto:Kurt.Kayser@bmi.bund.de"><span style="color:blue">Kurt.Kayser@bmi.bund.de</span></a></span><span style="font-size:12.0pt;color:black;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:#1F497D;mso-fareast-language:DE">Internet: <a href="http://www.bmi.bund.de/"><span style="color:blue">www.bdbos.bund.de</span></a></span><span style="font-size:12.0pt;color:black;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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