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Finally, I find in my /etc/neutron/plugins/ml2/ml2_conf.ini configuration file, I did not configured the ml2 type_drivers and mechanism_drivers. So I config them:

# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 type_drivers flat,vlan,vxlan
# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 mechanism_drivers linuxbridge,l2population

And restart the neutron-server:

systemctl restart neutron-server.service
systemctl restart  neutron-l3-agent.service

Now, it works fine.