I can verify that with NEUTRON_DEPLOY_MOD_WSGI=true that nothing is connecting to the running ovn ovsdb servers.
[vagrant@localhost devstack]$ sudo lsof -itcp:6641 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ovsdb-ser 103806 openvswitch 17u IPv4 207781 0t0 TCP *:6641 (LISTEN)
I can verify that with NEUTRON_ DEPLOY_ MOD_WSGI= true that nothing is connecting to the running ovn ovsdb servers.
[vagrant@localhost devstack]$ sudo lsof -itcp:6641
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
ovsdb-ser 103806 openvswitch 17u IPv4 207781 0t0 TCP *:6641 (LISTEN)