The alarm suppression mode. When alarms are suppressed, no
alarms will be generated if a fault situation is detected on
the interface. Failures will still be shown by the object
itsIfFailure.
notSupported(0). Suppress alarms is not supported by the
interface. This value can not be written.
none(1). No alarms are suppressed. All alarms are reported.
warning(2). Suppress alarms of severity warning only.
all(3). All alarms are suppressed. No alarms will be
reported.