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# NV monitoring

NV starts and stops automatically as you start and stop a scenario. NV metrics are automatically collected during the scenario run, and displayed in the NV monitor.

The most typical network effects which you can configure with the NV software are:

- Latency. The Latency value you define represents the time in milliseconds that it takes an IP packet to cross the network. This is usually affected by geographical distance, the available bandwidth, the network load on the route between the two ends, and whether this is a terrestrial link or not.

- Packet Loss. The Packet Loss value you define represents the chance of losing IP packets while data travels through a network. Packets can get lost due to link faults or due to extreme network load.

- Bandwidth. The Bandwidth value you define represents the capacity of your network to transfer data.

When you enable NV for a scenario, you choose the monitoring mode—per group or per load generator. The graphs show the measurements per group or load generator, based on your selection.

For information on setting these parameters, see Network Virtualization.

### See also

- Average Latency monitor graph

- Packet Loss monitor graph

- Average Throughput monitor graph

- Average Bandwidth Utilization monitor graph

- Total Throughput monitor graph

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