Documentation for WhatsUp Gold plug-ins

NetFlow Monitor Performance Tuning

About NetFlow performance tuning

The following NetFlow Monitor performance tuning information is updated as performance issues are discovered and resolved.

Contact Technical Support, if you experience performance issues.

NetFlow Monitor router configuration to reduce spiked data on long-lived connections

In cases where NetFlow Monitor is monitoring data flow between devices that have a long-lived connection, such as router linked between two office sites, you may get spikes in the flow data. Cisco routers by default break and send NetFlow stats every thirty-minutes for long-lived connections. To reduce the data spikes, change the router configuration with the following command:

ip flow-cache timeout active <n>

Where n is the number of minutes. The minutes should be configured to less than or equal to the NefFlow Data collection interval setting which is 2 minutes by default.