sudo ovs-vsctl list controller

mininet@mininet-vm:~$ sudo ovs-vsctl list controller
_uuid               : 39a115f0-4632-4102-8168-8686d00d3e5c
connection_mode     : []
controller_burst_limit: []
controller_rate_limit: []
enable_async_messages: []
external_ids        : {}
inactivity_probe    : []
is_connected        : false
local_gateway       : []
local_ip            : []
local_netmask       : []
max_backoff         : []
other_config        : {}
role                : other
status              : {last_error="Protocol error", sec_since_disconnect="0", state=BACKOFF}
target              : "ssl:10.0.1.6:6653"