ballscrew
Posts: 1
Joined: Thu Feb 08, 2018 8:31 am

CM with LAN chip - use RPi Foundation OUI

Thu Feb 08, 2018 9:03 am

Hello,
as a company, we have chosen RPI CM3 as development platform for a project and designed a board which uses CM3 and has LAN9512 on board (for ethernet connectivity).
The firmware sets the MAC address of eth0 automatically with one of the MAC address assigned to RPI foundation as for any other Raspberry PI board.

Is it fine for Raspberry Pi foundation that CM customers uses their OUI b8:27:eb:xx:xx:xx in their end products OR shall customers request IEEE a MAC address block for their own company?

I could not find this information anywhere both in site and forum. Sorry if was already answered.

Thank you!

PhilE
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 1881
Joined: Mon Sep 29, 2014 1:07 pm
Location: Cambridge

Re: CM with LAN chip - use RPi Foundation OUI

Thu Feb 08, 2018 9:51 am

Thanks for asking - we are happy for CM customers to use the Pi OUI with an Ethernet interface of their choice. The firmware writes the MAC address into the Device Tree if there is a node with the label "ethernet0", but if you are unable to make use of this mechanism then allocating MAC addresses by other means and statically programming the devices is also acceptable. Just be aware of the possibility of a collision with another Pi - 16 million addresses is not that many to choose from, and they are assigned to Pis effectively randomly.

W. H. Heydt
Posts: 9099
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: CM with LAN chip - use RPi Foundation OUI

Mon Feb 12, 2018 4:42 am

PhilE wrote:
Thu Feb 08, 2018 9:51 am
Just be aware of the possibility of a collision with another Pi - 16 million addresses is not that many to choose from, and they are assigned to Pis effectively randomly.
Interesting point....Pi production is past the point where there *must* be address collisions between Pis, as there are more that 16 million in the wild!

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