if evt.summary.startswith('threshold of operational status '):
    d = dmd.Devices.findDevice(evt.ipAddress)
    if evt.severity > 0:
        evt.summary = "interface operationally down"
        for interface in d.os.interface():
            if interface.getInterfaceName() == evt.component:
                interface.operStatus = 2
    else:
        evt.summary = "interface operationally up"
        for interface in d.os.interface():
            if interface.getInterfaceName() == evt.component:
                interface.operStatus = 1