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Miguel, 

I talked to our driver architect and according to him this is vendor implementation (according to him this  should work with  Mellanox NIC)
I need to verify that this indeed working. 
I will update after I will prepare SR-IOV setup and try it myself.


-----Original Message-----
From: Miguel Angel Ajo Pelayo [mailto:majopela at redhat.com] 
Sent: Wednesday, August 10, 2016 12:04 PM
To: OpenStack Development Mailing List (not for usage questions) <openstack-dev at lists.openstack.org>
Cc: Armando M. <armamig at gmail.com>; Moshe Levi <moshele at mellanox.com>
Subject: Re: [openstack-dev] [neutron] Neutron Port MAC Address Uniqueness

@moshe, any insight on this?

I guess that'd depend on the nic internal switch implementation and how the switch ARP tables are handled there (per network, or global per switch).

If that's the case for some sr-iov vendors (or all), would it make sense to have a global switch to create globally unique mac addresses (for the same neutron deployment, of course).

On Wed, Aug 10, 2016 at 7:38 AM, huangdenghui <hdh_1983 at 163.com> wrote:
> hi Armando
>     I think this feature causes problem in sriov scenario, since sriov 
> NIC don't support the vf has the same mac,even the port belongs to the 
> different network.
>
>
> 发自网易邮箱手机版
>
>
> On 2016-08-10 04:55 , Armando M. Wrote:
>
>
>
> On 9 August 2016 at 13:53, Anil Rao <anil.rao at gigamon.com> wrote:
>>
>> Is the MAC address of a Neutron port on a tenant virtual network 
>> globally unique or unique just within that particular tenant network?
>
>
> The latter:
>
> https://github.com/openstack/neutron/blob/master/neutron/db/models_v2.
> py#L139
>
>>
>>
>>
>> Thanks,
>>
>> Anil
>>
>>
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