Detect one or more SNMP trap events received over a given period. See significant events (device security, enclosure temperature, network congestion and more) from SNMP-enabled devices.

Note: This threshold expects that SNMP trap types are already setup and ready to be triggered at the target device. The threshold reacts to the frequency and presence of these triggered or trap events.

Configure an SNMP trap threshold:

  • Name. Used in the Threshold library and the title on the Alert Center Dashboard.
  • Notification Policy. (Optional) Select the notification policy to apply to this threshold. The policy initiates notifications when an item is outside the configured threshold limits.
  • Threshold Check Interval. Enter a time interval for Alert Center to check the Network Performance Monitor database for items that are out of the threshold limits.

    Automatically resolve items no longer out of threshold. Select this option if you want Alert Center to automatically resolve items when they return to the value within the threshold limit.

Note: Notification policies are optional for most thresholds. If you do not select a notification policy, no notifications are generated for the threshold, but a dashboard report listing the out of threshold items still appears on the Alert Center Home page.

Add Condition Rules:

  • SNMP Trap type. Select the SNMP trap type from the list that you want to associate with this threshold. The list is populated with SNMP traps currently configured in the Passive Monitor Library.
  • Threshold. Select and enter the desired threshold criteria variables and values. The default threshold is configured to alert when the number of traps exceeds 500 in the past 60 minutes.

Select Applied Devices

  • Apply to All Devices. By default, the threshold monitors all applicable hosts.

    Exclude Devices. Select to build or apply an exclusion list.

  • Click Apply this Threshold to Specific Devices to choose the hosts to which the threshold applies.
    Note: Configure the threshold check interval for a longer time than the sampling interval for thresholds relating to trends, such as percent utilization. Configure it for a time the same as (or similar to) the sampling interval when configuring a threshold for a health check.