Question

A network engineer configures Flexible NetFlow on a WAN edge router to troubleshoot a persistent large file transfer that has been running for over 20 minutes. The collector shows the flow, but the byte and packet counters only update once the transfer completes, making it impossible to see near-real-time bandwidth consumption for the ongoing flow. The flow record and exporter are otherwise correct. Which action allows the collector to receive periodic updates for long-lived active flows?

Accepted Answer

Lower the flow monitor's cache active timeout value so long-lived flows are exported periodically

Answer

Lower the flow monitor's cache inactive timeout so idle flows are flushed sooner

Answer

Change the exporter transport protocol from UDP to TCP for reliable delivery

Answer

Reduce the template refresh timeout on the exporter so the collector re-learns fields faster