How to select the parent network of ovn network

A LXD OVN network can be connected to an existing managed Bridge Network or Physical Network to gain access to the wider network.
I have tried both ways.But I still don’t understand how to make a choice.

Is the network communication performance better if the Physical Network is used?

Who can help me interpret the application scenarios of two different parent networks?

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Result should be the same, what matters is that the network you’re connecting to is the same on all servers. Whether that’s through a physical nic (eth0/enpXYZ) or through a physical nic placed into a bridge, doesn’t really make any difference.

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