Cisco Cyber Vision is a real-time monitoring solution. The views are continuously updated with network data. You can view the network activity during a defined period of time by selecting a time span. Use time span to filter data, based on the time you select. This feature is available on each preset's view.

To set a time span: Click the pencil icon.

• To set a duration, select time (from 10 seconds to 1 day) or a custom period up to the present.

  

• To set a time window, select a start date and (optionally) an end date. If you don't select an end date, the end date will set to now.

  

  Set a time window to see everything that has happened during the selected period of time, such as historical data or to check the network activity (in case of on-site intrusion or accident).

Click Refresh to compute network data.

Note	No data display is often due to a time span set on an empty period. Remember to first set a long period of time (such as 12 months) before troubleshooting.

Recommendations:

Generally, you can set the time period to 1 or 2 days. This setting is convenient to have an overall view of most supervised standard network activities. This includes daily activities such as maintenance checks and backups.

Adjust the time frame for the following:

• Set a period of a few minutes to have more visibility on what is currently happening on the network.

• Set a period of a few hours to have a view of the daily activity or set a time to see what has happened during the night, the weekend, etc.

• Set limits to view what happened during the night/weekend.

• Set limits to focus on a time frame close to a specific event.