Down Interfaces
Down Interfaces report reveals interfaces in a down state.
- . The name or IP address of the monitored device with down monitors.
- . The individual interface name and unique index. For example, Ethernet0
: The Interface column displays the interface name because Discovery automatically populates the report with Active Monitor information. When creating an active monitor manually, add the interface name to the Comment field of the Active Monitor Properties dialog, otherwise the Interface column in this report will appear blank.
- . The date and time the most recent state change occurred.
- . The length of time the interface has been in a Down state.
Generate a report
. 
Choose one or more host devices you want Down Interfaces measurements for.
Use the Select Device dialog for one of the following:
Control
|
Purpose
|
Device 
|
Browse and choose a single device.
|
Single Interface 
|
Choose an interface on a device.
|
Device Group 
|
Choose an existing group of one or more devices. You can also create custom or dynamic groups.
|
: You can organize devices into custom or dynamic groups. For more information, see Grouping Devices.
. (
,
) Choose times for the Down Interfaces. (For recently observed measurements, select from the Date Range drop down list.)
Choose time constraints for data view
Control
|
Purpose
|
Date Range
|
Choose or define an overall date range.
|
Business hours
|
- Focus on specific days of the week and periods within each day.
- Reveal trends that are sensitive to business hours, time zones, and other periodic attributes in the observed data.
|
. 
Sort and remove columns, group rows based on specific column values, and remove unwanted information from the table.
Filter and pick by column
Click a report heading 
and use the following from the drop down list:
Control
|
Purpose
|
Sort. 
|
Sort column in ascending or descending order.
|
Columns. 
|
Pick the columns you want to view. Click a check box to display the column. Clear the check box to hide it.
|
Group by this field.
|
Group table into collapsible rows wherever the current column contains identical data ("field") values.
|
Filters.
|
Provide a keyword to view only rows that contain the keyword for this column.
|
.
Fine tune report presentation and range of values displayed using the Report Settings dialog (optional).
Specify threshold and top n:
Control
|
Purpose
|
Show Top n Items
|
Limit items to the samples with the highest (or lowest) interface errors.
|
Threshold Type
|
Switch between minimum or maximum mode for cutoff values for the ranked list.
- At or Over. Show peak occurrence period. (Observations equal to or greater than Threshold.)
- At or Under. Show occurrences equal to or less than Threshold.
|
Threshold (percent)
|
Baseline value used to trim ranked device list based on peak or subpeak periods when returning the Top n.
|
Chart and visualize data over time (single device )
Charting and visualization is available when you select a single device.
Control
|
Purpose
|
Display Options
|
Present data as a chart, a table grid, or both.
|
Chart Type
|
- Gauge charts. Available when you select a Date Range of .
- Time series. Available when you select a Date Range interval (, for example).
- Line/Area. Scatter graph that connects adjacent measurements with straight lines.
- Spline/Area Spline. Choose a graph with a smoothed appearance where adjacent samples exhibit a gradual slope.
|
Chart Options
|
- Legend, Grid Lines, Range Selector. Include legend, grid lines, and range selector for readability.
- Trend Lines. Present data with a smoothed average to show trend.
- Vertical Axis Scale. Automatically scale to fit data or specify a finite range.
|
: Trend lines represent a moving average that can be compared with line and area graphs to reveal peak and sub peak intervals, collision periods, and indicate transmission problems.
: This report only returns Down Interfaces metrics for devices that already have the appropriate WMI or SNMP credentials. For more information, see Using Credentials.
Share, export, and save as PDF
Most generated Down Interfaces report data can be printed, shared, and exported when selecting (
) from the Dashboard Options (
) menu. After the report has been expanded, select export (
) to access the following options:
Device
Choose Device.