Open Stack

Hi Varun,

When Neutron is enabled, the last 3 octects of the MAC address are randomly
generated.
This is for avoiding clashes when instances are created concurrently and
for preventing potentially malicious users from guessing other users' MAC
addresses.

Any change to this logic will need code changes, as the algorithm for MAC
generation is not currently configurable.
The first three octects can instead be specified in a configuration file
and, as you wrote, default to fa:16:3e

It is my understanding that nova-network adopts a similar logic.

Regards,
Salvatore


On 21 January 2014 06:35, varun bhatnagar <varun292006 at gmail.com> wrote:

> Hi,
>
> How can I get the MAC Address of the network interface which I have
> created on Openstack?
>
> Also, is there any way where in I can define the MAC Address while
> creating any network?
>
> I tried digging in the code and I found out that the MAC Address assigned
> by Openstack starts with "fa:16:3e:". I want to assign fa:16:3e:00:00:01
> first network interface, fa:16:3e:00:00:02 to second and fa:16:3e:00:00:03
> to third network interface of my VM.
> Is this possible?
>
> Regards,
> Varun
>
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