def METHOD_NAME(
    toggle_all_simulator_ports_to_upper_tor, upper_tor_host, lower_tor_host,     # noqa F811
    send_server_to_t1_with_action, shutdown_tor_heartbeat, cable_type           # noqa F811
):
    """
    Send upstream traffic and stop the LinkProber module on the active ToR.
    Confirm switchover and disruption lasts < 1 second.
    """
    send_server_to_t1_with_action(
        upper_tor_host, verify=True, delay=MUX_SIM_ALLOWED_DISRUPTION_SEC,
        action=lambda: shutdown_tor_heartbeat(upper_tor_host)
    )
    if cable_type == CableType.active_standby:
        verify_tor_states(
            expected_active_host=lower_tor_host,
            expected_standby_host=upper_tor_host,
            cable_type=cable_type
        )
    if cable_type == CableType.active_active:
        verify_tor_states(
            expected_active_host=lower_tor_host,
            expected_standby_host=upper_tor_host,
            cable_type=cable_type
        )