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Hello Masataka-san
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<div>For that issue at least there was some effort.</div>
<div>Though ATM and FR appear to be long gone, the problem got even worse with pseudo wires / overlays and wireless.</div>
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<div>It was tackled in the IoT community 10+ years ago and we ended up with RFC 8505 and 8928. This is implemented in LoWPAN devices and deployed by millions. Allowing IPv6 subnets of thousands on constrained radios. </div>
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<div>I spent a bit of time explaining the architecture issue (in mild terms) and solutions in <a href="https://datatracker.ietf.org/doc/html/draft-thubert-6man-ipv6-over-wireless-12">https://datatracker.ietf.org/doc/html/draft-thubert-6man-ipv6-over-wireless-12</a>. </div>
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<div>So far we failed to get those RFCs implemented on the major stacks for WiFi or Ethernet.</div>
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<div>There’s a new thread at IETF 6MAN just now on adopting just the draft above - not even the solution. It is facing the same old opposition from the same few and a lot of silence. </div>
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<div>Somehow the group can spend years of heated discussions figuring out if you can insert a header or how you can build a 64 bits IID, but looking at a fundamental architecture issue like the one you point out does not raise much interest.</div>
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<div><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">My suggestion is still to fix IPv6 as opposed to drop it, because I don’t see that we have another bullet to fire after that one. For that particular issue of fixing ND, new</span><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"> comments
and support at the 6MAN on the draft above may help. </span></div>
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All the best;<br>
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<div>Pascal</div>
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<blockquote type="cite">Le 12 janv. 2023 à 05:34, Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> a écrit :<br>
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<div dir="ltr"><span>Randy Bush wrote:</span><br>
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<blockquote type="cite"><span>three of the promises of ipng which ipv6 did not deliver</span><br>
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<blockquote type="cite"><span> o compatibility/transition,</span><br>
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<blockquote type="cite"><span> o security, and</span><br>
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<blockquote type="cite"><span> o routing & renumbering</span><br>
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<span>You miss a promise of</span><br>
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<span> o ND over ATM/NBMA</span><br>
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<span>which caused IPv6 lack a notion of link broadcast.</span><br>
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<span> Masataka Ohta</span><br>
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