Top Hosts (Bar)

The Top Hosts (Bar) views show the top ten hosts that consume bandwidth for a particular interface. A bar graph shows the volume of network traffic for each host.

You can use this view to determine the IP addresses of hosts that are responsible for high volumes of network traffic. You can then contact the owner or user of each host to investigate the nature and purpose of the traffic.

You can view the hosts for incoming flows, outgoing flows, or all flows--as shown in the example graphic.

An identifier near the top shows the device and interface whose host data is displayed. The bar chart includes the following information:

Host Name

Identifies the host server by its fully qualified DNS name (if available) and IP address (Y-Axis).

Volume

Measures the total amount of data that was exchanged between the host and the interface (for example, in number of megabytes) (X-Axis).

By default, views and reports show the most recent 24 hours of data.

To see a Top Hosts (Bar) views in CA Performance Center, add it to a custom dashboard.

Available Actions for This View

You can perform several actions in this view, including the following actions:

• Change the traffic direction, the view name, and the interface by editing the view settings.
• Display Tooltip details by holding your cursor over a bar.
• Jump to details for a specific host on a CA Network Flow Analysis Interfaces page by clicking a bar.

Find Host Trend Views in the NFA Console

The Enterprise Overview page in the NFA console displays traffic volume for the top hosts in a bar chart.

You also can display host volume in trend charts for a selected interface:

• Overview -- Report type: Overview. Presentation menu options: Mixed Trend; Volume.

  View: Hosts Multi Trend Summary (From and To) for the Top N Hosts, plus other overview views.

• Top N Host Trend -- Report type: Hosts. Filter: Top N Hosts. Presentation menu options: Trend Chart; Volume.

  View: Host Trend for each of the Top N Hosts.

Note: To see trend charts for a single host, click Top N Hosts and select a host as the filter.

To display Flow Forensics-level detail, click the Flow Forensics link and run a Flow Forensics report.