'Have ovsdb-server listen for manager connections
:param connection_uri: Manager target string
:param timeout: The Manager probe_interval timeout value
(defaults to ovs_vsctl_timeout)'

def add_manager(self, connection_uri, timeout=_SENTINEL):

    if (timeout is _SENTINEL):
        timeout = cfg.CONF.ovs_vsctl_timeout
    with self.ovsdb.transaction() as txn:
        txn.add(self.ovsdb.add_manager(connection_uri))
        if timeout:
            txn.add(self.ovsdb.db_set('Manager', connection_uri, ('inactivity_probe', (timeout * 1000))))
