On Tue, Aug 10, 2010 at 05:08:16PM -0400, Jon Smirl wrote:
> On Tue, Aug 10, 2010 at 4:26 PM, Dmitry Eremin-Solenikov
> <[email protected]> wrote:
> > On 8/10/10, Jon Smirl <[email protected]> wrote:
> >> I'm added a command to the serial serial driver to retrieve the MAC
> >> address. That let me implement the code needed to auto-add link local
> >> addresses.
> >>
> >> wpan0     Link encap:IEEE 802.15.4  HWaddr 00:50:c2:ff:fe:a8:a8:c5
> >>           inet6 addr: fe80::50:c2ff:fea8:c545/64 Scope:Link
> >
> > This looks wrong. As hw-addr of WPAN device is 64-bit, IPv6 addr should
> > not contain fffe part. Or ff:ffe is a part of your real MAC address?
> 
> ffee is part of the real MAC address.  Mar owns a block of Ethernet
> addresses. To generate 64b addresses he added the ff:fe.
> 
> Mar, are you sure that is right? If you shipped Ethernet devices using
> one of your addresses the kernel would convert them to have the ff:fe
> and they would conflict. It would make more sense to use anything but
> FF:FE. Or is the rule that if you use the 64b version you can't also
> distribute the 48b one?

I followed this to encapsulate an EUI-48 in an EUI-64

http://standards.ieee.org/regauth/oui/tutorials/EUI64.html

and I followed this to generate an EUI-48 from an IAB or OUI block.

http://standards.ieee.org/regauth/oui/tutorials/EUI48.html

The econotags are using Redwire's IAB.

-Mar.

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