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Hi Trina,
I am not really sure that I understand your question. The Quantum 
service marshals the API's to a plugin. The plugin is responsible for 
providing the virtual network service. In the case of the OVS plugin the 
ovs_quantum_plugin.py will treat the API calls. That means that it will 
enable the user to perform CRUD operations on the following: networks, 
subnets and ports. In order to do this it stores the values in a 
persistent database.
The plugin has a layer 2 agent that performs the actual network 
configuration.
Hope that this help.
Thanks
Gary

On 12/07/2012 09:10 AM, Trinath Somanchi wrote:
> Hi Stackers-
>
> I have a doubt with respect to the Quantum OVS Plugin.
>
> [1] Do all the APIs of Quantum use the Quantum OVS plugin to get the 
> data from the database. or they directly contact the database.
>
> Since, I have seen ovs_quantum_plugin.py code, it has create_network, 
> update_network methods which use the db api.
>
> Is that the OVS Quantum Plugin APIs are partially used by the Quantum 
> APIs for getting data from database?
>
> Kindly help me understand these areas of Quantum.
>
> Thanks in advance
>
> -- 
> Regards,
> ----------------------------------------------
> Trinath Somanchi,
> +91 9866 235 130
>
>
>
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