<br><div class="gmail_quote">2012/1/25 Simon Hobson <span dir="ltr"><<a href="mailto:dhcp1@thehobsons.co.uk">dhcp1@thehobsons.co.uk</a>></span><br><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
José Queiroz wrote:<br><div class="im">
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Hi, sorry if this is a naive view. But, doesn't auto-assignment with EUID-64 suffixes attends your needs? This way you'll have a fixed IPv6 address, which haves a strong association with the MAC Address, and better, is predictable if you know the MAC address of the interfaces.<br>
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it will work for some, but it's not a good idea for public services. Simple example, what if you want to move a service to a different machine ? Using EUID-64 addresses means you either have to change the MAC on the new host to match, or change the DNS and wait while it propagates - with a day or 2 of parallel running while caches expire.<br>
</blockquote><div><br>Well, you can work out DNS to reduce this time. And if you have the intention of moving the services, maybe using anycast addresses can solve the problem.<br> <br></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
In practice, I suspect we'll start to see a return to using multiple addresses per machine/interface - which at one time was the only way to run multiple web sites on one host. So there may be some scope for using an EUID-64 address for the machine, and additional addresses for the service(s) run on it - but that's a whole new level of management system to sort out. </blockquote>
<div><br>I think that IPv6 made a move on this direction --- using multiple
addresses per machine/interface --- when it explicitly adopted this
concept.<br>
<br></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I'm not looking forward to applying IPv6 at work - I suffer badly enough with people that won't apply any logic to IPv4, I hate to think what they'll do when let loose with (say) 256 networks of 64k addresses !<br>
</blockquote><div><br>Well, you shall never doubt people's ability to create new ways of doing silly things.<br></div></div>