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Missed a detail. I'm using Juno and my nova.conf looks like this.
http://paste.openstack.org/show/138893/

Let me know if any more details are needed.

On Wed, Nov 26, 2014 at 8:05 PM, Abhijeet Rastogi
<abhijeet.1989 at gmail.com> wrote:
> Hi everyone,
>
> I'm using ML2 plugin with linuxbridges. My requirement is to use
> "flat" networks with public IPs (1.2.3.248/29) in the subnet.
> "physical_interface_mappings" in ML2:linuxbridge plugin is as simple
> as ['physnet1:eth0.4035']. Here, eth0.4035 is a 4035 vlan tagged
> interface on CentOS.
>
> When I execute "nova boot", I can see
> * instance getting the IP assigned
> * Neutron port also gets created.
> * The brqXXX and tabXXX interface also gets created.
>
> But, linuxbridge agent on compute node complains about tapXXX already
> existing. I'm confused because linuxbridge is the one that created the
> interface so how does it not know about the tap device.
>
> Full log can be seen here: http://paste.openstack.org/show/138845/ .
> I'll appreciate any kind of guesses and possible solutions.
>
> "nova list" shows the error as: "Build of instance
> 6e4ddb50-8630-4a4d-b400-477517721de7 aborted: Failed to allocate the
> network(s), not rescheduling.".
>
>
> --
> Cheers,
> Abhijeet Rastogi (shadyabhi)



-- 
Cheers,
Abhijeet Rastogi (shadyabhi)