openstack team mailing list archive

[Gary Kotton <gkotton@xxxxxxxxxx>]

On 10/20/2012 07:23 PM, Tim Bell wrote:
> If we purchase an OUI, is there a mechanism within Quantum to only 
> allocate Mac addresses with that prefix ?

At the moment Quantum enables the user to define a base MAC address. 
That is the user can update the configuration file. The user selects a 
base MAC and the MAC's are allocated in that range. I think that this 
gives us a lot of flexibility.

Please see below for the configuration options.

# Base MAC address. The first 3 octets will remain unchanged. If the
# 4h octet is not 00, it will also used. The others will be
# randomly generated.
# 3 octet
# base_mac = fa:16:3e:00:00:00
# 4 octet
# base_mac = fa:16:3e:4f:00:00

If I recall correctly this is hard coded in nova networking.

Thanks
Gary

> Tim
>
> *From:*openstack-bounces+tim.bell=cern.ch@xxxxxxxxxxxxxxxxxxx 
> [mailto:openstack-bounces+tim.bell=cern.ch@xxxxxxxxxxxxxxxxxxx] *On 
> Behalf Of *Salvatore Orlando
> *Sent:* 20 October 2012 10:20
> *To:* Vinay Bannai
> *Cc:* openstack@xxxxxxxxxxxxxxxxxxx
> *Subject:* Re: [Openstack] Use of MAC addresses in Openstack VMs
>
> Hi Vinay,
>
> I understand your concerns about conflicts with already assigned OUIs.
>
> It is however my opinion that it is not up to the Openstack 
> Foundation, but to entities deploying Openstack, to buy MAC OUIs.
>
> As regards Quantum, we should ensure the default MAC range we use is 
> locally assigned; unfortunately I do not know enough about nova-network.
>
> Also, it is my opinion that a locally-assigned OUI would be sufficient 
> for many use cases, without the need for a globally assigned one.
>
> Regards,
>
> Salvatore
>
> On 20 October 2012 04:05, Vinay Bannai <vbannai@xxxxxxxxx 
> <mailto:vbannai@xxxxxxxxx>> wrote:
>
> I was talking to Nachi and Gary during the Quantum design session 
> about the need to have a proper MAC OUI allocation scheme for 
> Openstack development folks. They suggested that I send it out for 
> wider discussion on the mailing list.
>
> It turns out that it would be useful for the Openstack foundation to 
> apply for a MAC OUI from IEEE that can be used for development 
> purposes and testing. This way we don't unwittingly use someone else 
> MAC allocation. Here are the details
>
> http://standards.ieee.org/develop/regauth/oui/index.html
>
> The cost to get a OUI allocation is around $2000 dollars. Remember if 
> we use random MAC OUI,  the actual owners can assert their legal claim 
> on the MAC address in the event of a conflict now that we have support 
> for more sophisticated tunnels that allow connections from public and 
> private clouds.
>
> Comments welcome.
>
> Vinay
>
>
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