STP_IN_enable_port
if ((rc = STP_IN_enable_port(port->port_index, False)) != 0)
if ((rc = STP_IN_enable_port(port->port_index, True)) != 0)
if ((rc = STP_IN_enable_port(port->port_index, !bc.bc_failed)) != 0)
rc = STP_IN_enable_port(port->port_index,
STP_IN_enable_port (int port_index, Bool enable);