I have a running multi node devstack setup which is using default Neutron plugin (OVS ML2). There are demo networks created by devstack installation script in this setup. My goal is to replace the default Neutron plugin with OpenDaylight ML2 plugin so that Neutron can use OpenDaylight SDN controller (OVSDB). Though I'm able to setup OpenDaylight Neutron plugin successfully when it is installed along with Neutron itself but, the integration does not work if I try to replace the Neutron plugin after the stack is fully setup with default plugin.

What is the process for replacing the default Neutron plugin once the devstack is installed and has some tenant networks created already?