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# Packet Loss graph

This graph shows number of data packets lost during the last second of the scenario run. Packet loss occurs when data packets fail to reach their destination. You can use this graph to see how the packet loss for a specific group increased as the scenario progressed. If you chose the Group by load generator mode when you enabled Network Virtualization for the scenario, the graph will show packet loss per load generator. It can result from gateway overload, signal degradation, channel congestion, or faulty hardware.

You cannot change the granularity of the x-axis to a value that is less than the web granularity you defined in the General tab of the Options dialog box.

For Analysis graphs (not applicable to monitoring graphs):

To view information for a specific location:

1. Click within the graph.
2. Select Set Filter/ Sort By from the right-click menu to open the Graph Settings dialog box.
3. In the Filter condition section, select the Location Name row, and select the relevant location from the drop-down list.

Axis | Description
--- | ---
X-axis | Elapsed time since the start of the run.
Y-axis | The following measurements: The percentage of lost packets from all packets that were sent. The number of data packets that were lost over 60 seconds. The total number of packets that were lost.

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