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Date: Wed, 06 May 2009 11:25:25 -0400
From: Steve Bertrand <steve@ibctech.ca>
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	=?ISO-8859-1?Q?=3F=3F?= <odhiambo@gmail.com>,
	John Nielsen <lists@jnielsen.net>, freebsd-questions@freebsd.org
Subject: Re: Configuring an IPv6 router to assign addresses
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af300wsm@gmail.com wrote:
> On May 6, 2009 8:56am, John Nielsen <lists@jnielsen.net> wrote:
>> On Wednesday 06 May 2009 10:39:24 am Odhiambo ワシントン wrote:
> 
> 
>> Is there a reason you need to control the addresses used by your clients
> 
>> (other than the prefix)? I set up IPv6 on my LAN and while I have DHCPd
> 
>> running on the router for IPv4 addresses rtadvd is all I needed for IPv6.
> 
>> Clients assign themselves addresses based on the network prefix they
> 
>> learn from route solicitation and their own MAC address. That's supposed
> 
>> to be one of the "reduced administration" benefits of the new
> 
>> protocol. :)
> 
> 
> Thanks for reminding me of the flow in which this happens. Seems like I,
> at sometime, got the idea that it was the router that dished back a
> unique IP based on clients MAC and so forth. However, it seems to me now
> that the router was only supposed to dish out the prefix, ie network id,
> and the client would take that prefix and generate a unique IP based on
> its MAC.

Have a peruse of this RFC (stateless autoconfig):

http://www.ietf.org/rfc/rfc4862.txt

Steve