There could be a mismatch in the number of devices between the Device Count by Severity dashlet, and the Devices view page. This is because, the Devices view page includes those devices that are marked for deletion as well, while the dashlet does not include the devices marked for deletion.
At least one instance of a TrueSight Infrastructure Manager server must be registered with the Presentation Server for this dashlet template to be available.
You can configure this dashlet when you .
Click the Configure Dashleticon.
From the Refresh Rate list, select a frequency for refreshing the chart view.
The default is 5 minutes.
Differentiating between the All and Select All options
In the Device Filter section there is a difference in behavior between choosing the All Groups or All Device Types and choosing the Select All option from the Groups and Device Types search dialog boxes.
See the figure for an example.
If the dashboard user selects an application from the Applications list at the dashboard level, then that selection is honored and takes precedence over the choices selected in this step.
It is possible that one or more of the selected applications, groups, or device types were deleted from the TrueSight server after they were selected. In that case, a red colored check box is displayed adjacent to the name of that application, group, or device type as shown in this figure.
From the Status list, select one or more event status to display:
By default Open, Acknowledged, and Assigned are selected.
From the Severity list, select one or more event severity to display:
By default, Critical, Major, and Minor are selected.
(Optional) Select Include devices only against highest severity.
This option counts a device against the highest severity only and excludes the device from being counted multiple times across different severity charts. For example, in the following table, Critical is the highest severity for Devices A and C, Major is the highest severity for Device B, and Minor is the highest severity for Device D. Therefore, this option displays the device counts for Critical as 2 (Devices A and C), Major as 1 (Device B), and Minor as 1 (Device D).
When this option is not selected, all devices are counted under their respective severity in the chart.
Click Apply to add the configured dashlet to the dashboard.
After you save the dashlet, change the dashboard row size settings to 50% or larger.