HP Network Direr Software Products manual On a link, Requirements

392CHAPTER 9: PERFORMANCE REPORTING

These database files are never automatically removed by 3Com Network Director, though the file size is allocated on initial creation and will not increase over time. For more on file sizes and managing the database size, see “Database management” on page 398.

Examples

Determining the An event has just been logged due to a link having a high number of cause of high errors errors. To determine the cause of high errors on the link:

on a link

1Launch the event browser.

2Select the event.

3Launch the More Detail dialog box. This gives an explanation of the event.

4Navigate to the Graph tab to see the monitor history for immediately before and after the time the event was generated.

5To launch the historical report for this link, click the hotlink below the graph.

6Scroll down to the Errors graph at the daily resolution.

7Click the hyperlink to view the breakdown of errors.

This report breaks down error types into under- and oversized packets, fragments, CRC errors and jabbers. This will enable you to determine the cause of the high number of errors. For example, a high volume of fragments indicates a high utilization on the link. To verify this check the utilization graph in the same report.

Predicting demand You have been asked to provide estimates for required network upgrades for bandwidth over the coming months. To do this:

requirements

1Select one of your core links.

2Launch the historical report for the link by selecting the Monitoring > Historical Report menu option.

3Click the Yearly Graphs (1 day average) hot-link at the top of the report to navigate to the yearly resolution graphs.

4Scroll down to the Utilization graph and examine it to determine its trend.