Displaying highest and lowest performers in a network view

You can monitor highest and lowest poll data metrics across all devices and interfaces within a selected network view using the Top Performers widget.

1. Network Health Dashboard
2. In the Network Health Dashboard, select a network view from the network view tree in the Network Views. The other widgets update to show information based on the network view that you selected.
   In particular, the Top Performers widget updates to show overall availability of chassis devices in network view. A second tab, called "Network View", opens. This tab contains a dashboard comprised of the Network Views GUI, the Event Viewer, and the Structure Browser, and it displays the selected network view. You can use this second tab to explore the topology of the network view that you are displaying in the Network Health Dashboard.

   For information about specifying which network view tree to display in the Network Health Dashboard, see Configuring the network view tree to display in the Network Health Dashboard.

3. In the Top Performers widget, proceed as follows:
   Select from the following controls to display chart, table, or trace data in the Top Performers widget.

   Metric

   Click this drop-down list to display a selected set of poll data metrics. The metrics that are displayed in the drop-down list depend on which poll policies are enabled for the selected network view. Select one of these metrics to display associated data in the main part of the window.

   Order

   Click this drop-down list to display what statistic to apply to the selected poll data metric.

   • Statistics available for all metrics, except the SnmpLinkStatus metric.
     • From Top: Displays a bar chart or table that shows the 10 highest values for the selected metric. The devices or interfaces with these maximum values are listed in the bar chart or table.
     • From Bottom: Displays a bar chart or table that shows the 10 lowest values for the selected metric. The devices or interfaces with these minimum values are listed in the bar chart or table.
   • Statistics available for the SnmpLinkStatus metric. In each case, a bar chart or table displays and shows devices for the selected statistic.
     • Unavailable: This statistic displays by default. Devices with this statistic are problematic.
     • Admin Down Devices with this statistic are not problematic as Administrators change devices to this state.
     • Available Devices with this statistic are not problematic.

   Note: The widget lists devices or interfaces depending on which metric was selected:

   • If the metric selected applies to a device, such as memoryUtilization, then the top 10 list contains devices.
   • If the metric selected applies to an interface, such as ifInDiscards, then the top 10 list contains interfaces.

   Show Chart

   Displays a bar chart with the 10 highest or lowest values. Show Chart is the display option when you first open the widget.

   Show Table

   Displays a table of data associated with the 10 highest or lowest values.

   Define Filter

   This button only appears if you are in Show Table mode. Click here to define a filter to apply to the Top Performers table data.

   The main part of the window contains the data in one of the following formats:

   Chart

   Bar chart with the 10 highest or lowest values. Click any bar in the chart to show a time trace for the corresponding device or interface.

   Table

   Table of data associated with the 10 highest or lowest values. The table contains the following columns:

   • Entity Name: Name of the device or interface.
   • Show Trace: Click a link in one of the rows to show a time trace for the corresponding device or interface.
   • Last Poll Time: Last time this entity was polled.
   • Value: Value of the metric the last time this entity was polled.

   Trace

   Time trace of the data for a single device or interface. Navigate within this trace by performing the following operations:

   • Zoom into the trace by moving your mouse wheel forward.
   • Zoom out of the trace by moving your mouse wheel backward.
   • Double click to restore the normal zoom level.
   • Click within the trace area for a movable vertical line that displays the exact value at any point in time.

   Click one of the following buttons to specify which current or historical poll data to display in the main part of the window. This button updates the data regardless of which mode is currently being presented: bar chart, table, or time trace.

   Restriction: If your administrator has opted not to store poll data for any of the poll data metrics in the Metric drop-down list, then historical poll data will not be available when you click any of the following buttons:

   • Last Day
   • Last Week
   • Last Month
   • Last Year

   Current

   Click this button to display current raw poll data. When in time trace mode, depending on the frequency of polling of the associated poll policy, the time trace shows anything up to two hours of data.

   Last Day

   Click this button to show data based on a regularly calculated daily average.

   • In bar chart or table mode, the top 10 highest or lowest values are shown based on a daily exponentially weighted moving average (EWMA).
   • In time trace mode, a time trace of the last 24 hours is shown, based on the average values.

   In the Last Day section of the widget EWMA values are calculated by default every 15 minutes and are based on the previous 15 minutes of raw poll data. The data presented in this section of the widget is then updated with the latest EWMA value every 15 minutes.

   Last Week

   Click this button to show data based on a regularly calculated weekly average.

   • In bar chart or table mode, the top 10 highest or lowest values are shown based on a weekly exponentially weighted moving average (EWMA).
   • In time trace mode, a time trace of the last 7 days is shown, based on the average values.

   In the Last Week section of the widget EWMA values are calculated by default every 30 minutes and are based on the previous 30 minutes of raw poll data. The data presented in this section of the widget is then updated with the latest EWMA value every 30 minutes.

   Last Month

   Click this button to show data based on a regularly calculated monthly average.

   • In bar chart or table mode, the top 10 highest or lowest values are shown based on a monthly exponentially weighted moving average (EWMA).
   • In time trace mode, a time trace of the last 30 days is shown, based on the average values.

   In the Last Month section of the widget EWMA values are calculated by default every two hours and are based on the previous two hours of raw poll data. The data presented in this section of the widget is then updated with the latest EWMA value every two hours.

   Last Year

   Click this button to show data based on a regularly calculated yearly average.

   • In bar chart or table mode, the top 10 highest or lowest values are shown based on a yearly exponentially weighted moving average (EWMA).
   • In time trace mode, a time trace of the last 365 days is shown, based on the average values.

   In the Last Year section of the widget EWMA values are calculated by default every day and are based on the previous 24 hours of raw poll data. The data presented in this section of the widget is then updated with the latest EWMA value every day.