Class-Based QoS Usage
Class-Based QoS Usage report reveals class-based quality of service (CBQoS) metrics within your network, where "class" denotes a traffic stream that can be identified by different criteria such as interface, port, and so on. This report indicates the effectiveness of class-based policies applied for specific traffic classes, which are used to prioritize and shape network traffic patterns. Note that class-based polices can be applied to specific interfaces and traffic direction.
Class-Based QoS Usage chart data reflect the following:
- QoS Class Map. Displays the QoS class name as defined by the policy assigned to the interface.
- Pre-Policy. Displays the amount of traffic for the class before the policy is applied (for the selected date range).
- Post-Policy. Displays the amount of traffic for the class after the policy is applied (for the selected date range).
- Dropped. Displays the number of bytes dropped as a result of applying the policy to the class (for the selected date range).
- . Traffic class.
- . Policy applied.
- Policy rules.
- . Flow source.
- . Network interface.
- . Traffic direction across the interface (In/Out). Bounced traffic is not considered.
- . Pre-policy bandwidth.
- . Pre-policy observed rate.
- . Post-policy bandwidth.
- . Post policy observed rate.
- . Dropped volume.
- . Rate observed where traffic was dropped.
: You must have defined QoS classes and policies on the source device before this report is able to display results.
: The CBQoS information generated by the source device must be gathered using SNMP polling for CBQoS information.
Generate a report
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Choose a networking device or single physical or virtual interface you want to see Class-Based QoS Usage measurements for. Choose traffic direction across an interface.
Use the Select Device dialog for one of the following:
Control
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Description
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Device. 
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Browse and choose a networking device that is a Network Traffic Analysis monitoring source.
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Network Interface. 
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- Choose a single physical or virtual interface Network Traffic Analysis you want traffic statistics for.
- Choose direction of traffic over the network interface (, , , or for invalid traffic.).
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Choose times for the Class-Based QoS Usage.
Choose time constraints for data view
Control
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Purpose
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Date Range 
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Choose or define an overall date range.
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Business hours 
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- 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.
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Choose and hide columns, reorder columns, and apply advanced filters
to customize your data view.
Filter and pick by column
Click a report heading (
) and use the "column picker" (
) from the drop down list.
Control
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Purpose
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Columns. 
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Click a check box to display the column. Clear the check box to hide it.
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Move Column.
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Click on a column heading and drag it to reorder your table's columns.
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Advanced Filtering. 
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Apply category, pattern, and keyword filtering to column data.
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Fine tune report presentation and range of values displayed using the Report Settings
dialog (optional).
Specify threshold and top n:
Control
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Purpose
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Show Top n Items
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Limit items to the samples with the highest values.
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Sort by Field
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Select a column to sort by (if applicable).
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Chart and view options
Control
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Purpose
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View Options
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Select/clear the checkboxes to display/hide
- Totals. Display totals for each column.
- Others. Remainder values that do not make the top n.
- Chart. Display the selected Chart Type
- Legend. Include legend and grid lines for readability.
- Trend Lines. Present data a smoothed average to show trend.
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Chart Type
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Select a chart type and associated options:
- Pie. Pie distribution chart.
- 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.
- Vertical Bar/Horizontal Bar. Vertical or horizontal bar chart/histogram.
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Y-Axis Scale
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Scale Y-axis (chart and graph height) automatically or choose a fixed size.
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Share, export, and save as PDF
Most generated Class-Based QoS Usage 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: