<div dir="ltr"><div><div><div><div>Mark,<br></div>Thanks for posting this great summary of approaches to delivering ipV6 over UDP. It's important that we have active discussion, so the community both knows what approaches are being considered, and where the industry as a whole is moving. Because migration to ipv6 isn't purely a technical problem. There's the interplay of technology and business models that creates the ecosystem which can't exist without consensus solutions. And obviously starting a conversation is the first step to any consensus solution.<br><br></div>Where I think we need to be seeing more discussion, is around the business cases for the various architectures, scale, and opportunity costs. For instance, where is the road map once you have heavy use of ipv6 over UDP, and you discover lack of flow control is no longer specific to points of aggregation, but has become a feature of flows across the network?<br><br></div><div>Someone I think once thought, we'll just tack on 96(32 actually) extra bits and the address problem would be solved. The problem is the economies of scale for ipv4 are better than ipv6, and no one considered the operational costs of running both stacks, to allow the bridging needed as a fundamental part of a migration and successful evolution.<br></div><div><br></div>Kind regards<br><br></div>Paul Wilkins<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 25 March 2017 at 15:10, Mark Smith <span dir="ltr"><<a href="mailto:markzzzsmith@gmail.com" target="_blank">markzzzsmith@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><a href="https://blog.apnic.net/2017/03/24/udp-ipv4-stepping-stone-ipv6/" rel="noreferrer" target="_blank">https://blog.apnic.net/2017/<wbr>03/24/udp-ipv4-stepping-stone-<wbr>ipv6/</a><br>
<br>
Regards,<br>
Mark.<br>
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