Re: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-client-link-layer-addr-opt-00.txt

perl-list <perl-list@network1.net> Mon, 16 July 2012 12:52 UTC

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Date: Mon, 16 Jul 2012 08:53:23 -0400
From: perl-list <perl-list@network1.net>
To: Glen Eustace <G.Eustace@massey.ac.nz>
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Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-client-link-layer-addr-opt-00.txt
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I can't remember which, but it is either Mac OS or windows 7 that use a random mac to generate the link local address and in turn use the link local to generate the DUID (or the reverse - in any case, it wasn't the mac of the interface). D-Link routers use no mac at all and just randomly generate the DUID. Neither of those device's macs can be gotten from the DUID. 

----- Original Message -----

> From: "Glen Eustace" <G.Eustace@massey.ac.nz>
> To: "dhcwg" <dhcwg@ietf.org>
> Sent: Sunday, July 15, 2012 4:45:02 PM
> Subject: Re: [dhcwg] I-D Action:
> draft-ietf-dhc-dhcpv6-client-link-layer-addr-opt-00.txt

> > Some equipment doesn't use any mac at all to generate the DUID
> > which is perfectly acceptable in the related RFC.
> > If the DUID always used the mac, then we wouldn't need this draft
> > at all.

> Correct but in an Enterprise environment like ours, the majority of
> clients do. I haven't seen any that don't yet. I just thought it
> might be interesting to see in how many cases the MAC used for IPv4
> actually was successful in identifying the client (for back office
> purposes)

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