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Hi,

VLAN transparency is not supported for OVS mechanism driver. Maybe somewhere in future - that was reported, for example in [1] 

Maybe you would consider using ‘VLAN aware VMs’ aka Neutron trunk ports, [2]?

BR, 
Konstantin
[1] https://bugs.launchpad.net/neutron/+bug/1604222 <https://bugs.launchpad.net/neutron/+bug/1604222>
[2] https://specs.openstack.org/openstack/neutron-specs/specs/newton/vlan-aware-vms.html <https://specs.openstack.org/openstack/neutron-specs/specs/newton/vlan-aware-vms.html> 

> On Feb 17, 2017, at 3:30 PM, Xu, Rongjie (Nokia - CN/Hangzhou) <rongjie.xu at nokia.com> wrote:
> 
> Hi,
>  
> I want to use vlan_transparent feature of neutron. What shall I do to enable this feature?
>  
> Here is what I currently have done: enable following option on both controller and compute and restart neutron related services.
> /etc/neutron/neutron.conf
> vlan_transparent = True
>  
> With this configuration, I launched two VMs attached to one L2 tenant network with vlan_transparent enabled. I set up vlan on VM port manually and try to ping each other. But it does not work as ARP packets are dropped inside OVS. Per my understanding, I shall miss something of configuration so OVS ARP flows are not added automatically. 
>  
>  
>  
> Best Regards
> Xu Rongjie (Max)
>  
>  
>  
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