IPv6 end user addressing

Owen DeLong owen at delong.com
Thu Aug 11 01:56:46 UTC 2011

On Aug 10, 2011, at 6:43 PM, William Herrin wrote:

> On Wed, Aug 10, 2011 at 2:17 PM, Jeff Wheeler <jsw at inconcepts.biz> wrote:
>> On Wed, Aug 10, 2011 at 2:03 PM, Owen DeLong <owen at delong.com> wrote:
>>> That said, /48 to the home should be what is happening, and /56 is
>>> a better compromise than anything smaller.
>> You don't really imagine that end-users will require
>> more than 2^8 subnets, but that they will want several levels of very
>> simple, nibble-aligned routers within their network?
> Hi Jeff,
> In Owen's world, the refrigerator, toaster and microwave each request
> a /64 from the GE Home Appliance Controller, those /64's being
> necessary to address each appliance's internal button, light and
> sensor networks. To accommodate all of these appliances, the HAC has
> acquired a /59 for all the home appliances from the Home Automation
> System (HAS) which also has its own LAN and supplied a big block to
> the furnace and a smaller block to the security system. So, the HAS
> needed a /58 which it got from the Linksys Home Router.
> The Sony Home Entertainment Network (HEN) Controller also needed a /58
> from the Home Router to accommodate the Playstation 5's need for a /62
> (one /64 for its internal network, another for the PSN VPN and a third
> for the peripherals network). The Ultra-NES 512 only needed one /64,
> but the amplifier insisted on a /60 so it could delegate /64's to the
> cassette tape deck, cd player, mp3 player, etc.
> The Ford Home Automotive Network (HAN) also grabbed a block from which
> to delegate /62's to the three parked cars. Because you know: you need
> separate networks in each car for the life safety systems, the
> non-safety systems and the entertainment systems. I mean really, why
> wouldn't the life safety system in a car dynamically acquire its
> globally-addressable IPv6 addresses from the customer's cheap home
> Internet equipment? So they'll each need their /64's which means the
> car as a whole needs a /62. But the HAN only needed a /60 for for all
> of it since there were only 3 cars.
> Now, the Windows 9 PC sat on the /64 PC LAN directly connected to the
> Home Router, but it needed an additional /64 for its virtual machine
> network hosting the Windows XP VM needed to run older software. And
> the wireless LAN only ended up consuming a single /64. But after the
> two /58's, that meant the Home Router needed a full /56 from the
> Internet Router.
> Finally, the Internet Router connects two networks... the customer's
> web server DMZ (/64) and the home router (/56). So after you figure in
> the HAC, the HAN, the HAS, the HEN and all the other connections you
> need at least a /55... which doesn't fit in a /56 but does fit in a
> /48. Qed. *
Thanks... An excellent write up, even if it was intended tongue in cheek.

However, you left out the need for addressing for the RFID tags that will
end up on most groceries, etc.

> Now, in Bill's world, the appliances don't expose their internals.
> When they employ any form of IP networking inside, which they
> generally don't, they use fe80 link-local addresses inside or maybe a
> ULA prefix.  So even you have a Smart Fridge within the time span that
> you care about for today's home user IPv6 assignments, it occupies a
> single public address on your home's flat /64. Ditto the game consoles
> and tape decks. With maybe two other /64's: one for servers and one
> for the wireless LAN. And that /62 need easily fits in your /56
> assignment.

I'm glad I live in Owen's world and not Bill's. I think my appliance vendors
will make much cooler and more useful products than yours.


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