<html aria-label="message body"><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">It looks like when the PAU definition got moved from section 6 to section 2, it got decoupled and so 2.15 reads “Provider Assignment Unit” and 6.5.2.1 refers to “Provider Allocation Unit”.<div><br></div><div>This may be part of the disconnect… Nonetheless, ARIN has been failing to apply the section 2.15 definition of Provider Assignment/Allocation Unit (we should pick one and harmonize the two sections as an editorial change) as intended.</div><div><br></div><div>I quote 2.15:</div><div><h3 id="2-15-provider-assignment-unit-ipv6" style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0.5rem; font-weight: 500; line-height: 1.2; color: rgb(0, 45, 56); font-size: 1.575rem; font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";">2.15. Provider Assignment Unit (IPv6)</h3><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";">When applied to IPv6 policies, the term “provider assignment unit” shall mean the <b><u>prefix of the smallest block </u></b>a given ISP assigns to end sites (recommended /48).</p><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";"><br></p><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";">(Underline and bold emphasis added)</p><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";"><br></p><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";">We should probably also change “prefix of” to “prefix size of” in that same editorial fix.</p><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";"><br></p><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";">Owen</p><p style="font-size: 16px; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; overflow-wrap: break-word; line-height: 1.5; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";"><br></p><div><br><blockquote type="cite"><div>On Feb 16, 2026, at 17:50, William Herrin <bill@herrin.us> wrote:</div><br class="Apple-interchange-newline"><div><div>On Tue, Feb 17, 2026 at 9:24 AM John Sweeting <jsweeting@arin.net> wrote:<br><blockquote type="cite">Suggest you read the staff assessment again<br></blockquote><br>Staff assessment:<br><br>"ARIN staff currently implements 6.5.2.1.c BASED ON THE TEXT ALONE.<br>The summarized formula is overly complex for your typical IPv6<br>requestor. The text alone is more easily understood by customers and<br>implemented by ARIN staff."<br><br>NRPM section 6.5.2.1c, first paragraph ('the text"):<br><br>"The maximum allowable allocation shall be the smallest<br>nibble-boundary aligned block that can provide an equally sized<br>nibble-boundary aligned block to each of the requesters serving sites<br>large enough to satisfy the needs of the requesters largest single<br>serving site using no more than 75% of the available addresses."<br><br>NRPM section 6.5.2.1c, second paragraph ("the summarized formula"):<br><br>"This calculation can be summarized as /N where N = P-(X+Y) and P is<br>the organization’s Provider Allocation Unit X is a multiple of 4<br>greater than 4/3*serving sites and Y is a multiple of 4 greater than<br>4/3*end sites served by largest serving site."<br><br>This formula, which staff explicitly says they do not implement, is<br>the only place in section 6.5.2 where PAU appears.<br><br>Regards,<br>Bill Herrin<br></div></div></blockquote></div><br></div></body></html>