Monitoring Your Network in Monitor Mode

Monitor mode in Network Director provides you visibility into your network status and performance. Network Director monitors your managed devices and maintains the information it collects from the devices in a database. Monitor mode displays this information in easy-to-understand graphs and in tables that can be sorted and filtered, enabling you to quickly visualize the state of your network, spot trends developing over time, and find important details.

The Monitoring Categories

Monitor mode divides monitoring activity into the following categories:

You can access these categories through tabs on the Monitor mode landing page, as shown in Figure 11. An additional tab, the Summary tab, provides a high-level dashboard for the scope selected in the View pane. The monitoring information displayed in the Summary tab also appears on other tabs.

Figure 11: Monitor Mode Main Window and Tabs

Monitor Mode Main Window and
Tabs

Monitors—Information At-a-Glance

When you select a monitor tab, the landing page for that tab displays a set of monitors. Use these monitors to see at-a-glance important information about the aspect of your network being monitored. For example, the monitors in the Client tab, shown in Figure 12, present high-level information about sessions—the users and client sessions consuming the most bandwidth, the current count of active sessions by type, and the trend in session count over time.

Figure 12: Client Monitors Provide High-Level Summaries of Sessions

Client Monitors Provide
High-Level Summaries of Sessions

The monitors and the data they display are determined by your scope. As an example, the monitors in the Equipment tab vary according to whether you have selected a standalone switch, Virtual Chassis, or wireless LAN controller as your scope. When a monitor is available in higher scope than a device, the data it displays is aggregated from all devices within the scope. For example, if your current scope is a floor that has access points assigned to it, the monitors in the Client tab show session data aggregated from all the wireless access points on that floor.

Summary Tab—Dashboard for Selected Scope

In addition to the four tabs for the monitoring categories, an additional tab, the Summary tab, acts as a dashboard for the selected scope in the View pane. The monitors displayed in the Summary tab can belong to any of the monitoring categories. The set of monitors displayed in the Summary tab depends on your scope—each scope has a predefined set of monitors that are appropriate for the object or portion of the network being monitored. For the My Network scope, you can customize what monitors appear on the Summary tab, giving you the ability to view at a glance those aspects of overall network state and performance that are most important to you.

Trend Graphs—Spotting Trends over Time

Besides providing current data, Network Director provides historical data so that you can see trends in an aspect of network performance over time. Figure 13 shows an example of a trend graph.

Figure 13: Trend Graph Showing Change in Session Count in the Last 8 Hours

Trend Graph Showing Change
in Session Count in the Last 8 Hours

You can select various time periods—up to a year—over which the data is displayed. Some trend graphs, such as the one in Figure 13, contain shaded areas that show you the highest and lowest values that occurred during the time period represented by a data point.

Detailed Views and Tasks—Obtaining More Information

In addition to providing high-level summaries, most monitors also provide detailed information when you click the Details icon on the monitor. For example, if you click the Details icon from the Top Sessions by MAC Address monitor, the Top Sessions Detail table appears, as shown in Figure 14. From this table you can obtain information about a particular client session, such as username, IP address, client VLAN, the access point or port being used, and so on.

Figure 14: Detailed Views Are Available from the Details Icon on Monitors

Detailed Views Are
Available from the Details Icon on Monitors

Monitor mode also provides a set of tasks in the Tasks pane that provide additional detailed or specialized information. These tasks vary according to the Monitor tab. Examples of tasks include searching for particular user sessions, viewing VLAN traffic or logical port status, generating real-time RF spectrograms, pinging hosts from a managed device, and so on.