Print and Update an Event Graph

The event graph ( show screen) displays three colored lines that represent the following event statistics:

• Blue line — The recorded statistics for the event's measurement variable
• Red line — The threshold value for the event. The event is triggered when the threshold condition is met
• Green line — The re-arm value for the event. The event is re-armed after a threshold condition is met, so that another event can be triggered

By default, the event graph analyzes traffic over the last hour, but the time period and end date are user-customizable. The ability to create reports for a specific time period is useful for creating comparison reports. For example, you can print one report that analyzes traffic over the last week (a period of one week, with now as the end date and time), and then print a second report that analyzes traffic for the week before that (a period of one week, with a specific date specified for the end date — the last day you want to analyze).

To specify a different time period:

1. In the Show field, specify the number of minutes, hours, days, weeks, or months for which you want traffic analyzed.

For example, by entering 2 in the Show field and selecting week for the unit of time, you create a report with the data PacketWise collected over the last two weeks. The minimum period you can specify is 1 minute; the maximum is 60 days (or 2 months).

2. To choose a specific end date for the report, select the month and day from the Before drop-down lists. If you want the current date as the end date, leave the default values of now.

Note: Although you can select a date from the previous 12 months, the unit may not store data that far back — the amount of historical data that is stored depends on how many traffic classes you have in your tree. The unit stores measurement data for a minimum of 31 days in hourly intervals and at least 1 day of data in one-minute intervals.

3. To choose a specific end time for the report, select the time from the drop-down list. If you want the current time as the end time, leave the default values of now.

4. Click update to update the statistics for the new time period.

Note: To update the graph at regular intervals, select an interval from the drop-down list located next to the update button.

5. To print the report, click print.