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The graphs panel at the top of the control panel provides a real-time view into the decision-making process of the CNA system. The panel also shows the traffic load on each of the ISP links that are defined in the CNA configuration.
The data displayed here is derived from information that is sent from the CNA decision-maker process to the CNA event-manager process. The Control Panel graphs are refreshed every 5 seconds; however, not all graphs are updated every 5 seconds. There are some graphs that are updated by the CNA system every 5 seconds, 30 seconds, or every 2 minutes.
Traffic load information is provided by the CNA link-monitor process, which obtains the data from SNMP agents on your edge routers. If link-usage polling is not enabled, these graphs will remain empty. See Chapter 4: Polling Routers in the CNA Advanced Monitoring Guide.
The graphs panel contains the following graphs:
The zone to zone outages graph reflect a recent change from the long-term network-performance behavior of the path between the zones. For example, an outage can occur if the absolute threshold for network parameters such as delay, jitter, and loss are exceeded. A zone to zone outage can also occur if the relative threshold for the same network parameters are exceeded. In addition, the lack of performance data on a zone to zone path would create stale performance information about that path. Stale path performance information is graphed in Zone to Zone outages.
In Multi-Path mode and Current-Path mode, the application performance rating graph shows how your top applications perform on all networks across all your configured networks. The system uses stars to indicate the performance range, which is indicative of the user experience. One star indicates the worst performance. Five stars indicates the best performance.
In the Multi-Path mode, the application availability graph shows the “nines availability” of your applications across each network. For example, a score of 99.907 means that applications on a particular network are working satisfactorily for that percentage of the time. This value would be rounded off to “three nines availability”.
In Current-Path mode, the application availability graph shows application availability for the 24 hour moving window and the application availability for the 2 minute window on the one network. The 24 hour moving window remains flat in most instances. The 2 minute window provides visibility into the short term availability variations.
The networks not rescued graph shows the number of networks that are now experiencing an outage that CNA was unable to rescue. In other words, CNA could find no other path around the network outage.
The top networks not rescued list shows you the most recent networks that experienced an outage that CNA was unable to rescue. You can left-click each item to receive more detail in the information window. Ongoing outages receive priority in the list and are marked with an exclamation point. For more information, see the show outage command in the CNA Command Reference Guide.
In the Multi-Path mode, the graphs display load information for each of your configured networks. These graphs plot the most recent 5 minutes of traffic in bits per second. Graph lines are color coded per link, according to the key in the Network Legend.
This graph is not available in Current-Path mode.
The measurements graph plots the number of measurements that are made per minute on each link.
The delay per network graph plots the network delays per minute on each link.
The jitter per network graph plots the network jitter per minute on each link.
The loss per network graph plots the network loss per minute on each link.
In the Multi-Path mode, the top rescued networks displays the actual networks where the greatest improvement was made. You can left-click on each item to bring up more detail in the information window at the bottom of the display, which includes the start time, end time, duration, and the reason for the outage. Ongoing outages are given priority in the list and are marked with an exclamation point. For more information on this, see the command show outage in the CNA Command Reference Guide.
This graph is not available in Current-Path mode.
Use the Group dropdown menu to filter the graphs in the graph panel by groups. This menu is under the Top Rescued Networks graph in the graphs panel. When you use this feature, the measurements graph changes to show average HRTT.
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