Threshold Crossing Alerts are preemptive, user-configurable alarms triggered when the specific thresholds are crossed. They alarm on both rising and falling threshold crossing events (that is, floor and ceiling levels). For both levels, one value raises the alarm, while another value clears it.
Configure TCAs with the Threshold Crossing Alert template.
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Times to Trigger – A value of 1 triggers an alarm on the first threshold crossing instance.
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n
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Appliance Capacity – triggers when an appliance reaches 95% of its total flow capacity. It is not configurable and can only be cleared by an operator.
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n
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File-system utilization – percent of non-Network Memory disk space filled by the appliance. This TCA cannot be disabled.
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n
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Tunnel latency – measured in milliseconds, the maximum latency of a one-second sample within a 60-second span
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n
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LAN-side receive throughput - based on a one-minute average, the LAN-side receive TOTAL for all interfaces
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n
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WAN-side transmit throughput - based on a one-minute average, the WAN-side transmit TOTAL for all interfaces
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Note 
Enabled by default, there is also an Appliance Capacity TCA that triggers when an appliance reaches 95% of its total flow capacity. It doesn’t automatically clear, but can be cleared by an operator. It is also not configurable.
Enabled by default, there is also an Appliance Capacity TCA that triggers when an appliance reaches 95% of its total flow capacity. It doesn’t automatically clear, but can be cleared by an operator. It is also not configurable.
This table lists the defaults of each type of threshold crossing alert:
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allow rising
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allow falling
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Appliance Level
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Tunnel Level
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