Question

A network engineer configures Flexible NetFlow on a Catalyst router to export traffic statistics to a collector. The flow exporter and a flow record named APP-RECORD are created, and the command 'ip flow monitor APP-MON input' is applied to GigabitEthernet0/1. However, 'show flow monitor APP-MON statistics' returns 'Flow Monitor APP-MON: is not associated with any interface' error and no flows are captured. What is the most likely cause?

Accepted Answer

The flow monitor APP-MON was not configured to reference the flow record and exporter, so it failed to be applied to the interface.

Answer

The flow record APP-RECORD is missing a 'match' field, which is required before any exporter can be associated.

Answer

Flexible NetFlow requires the direction keyword 'ingress' rather than 'input' on Catalyst platforms.

Answer

The exporter transport must be changed from UDP to TCP for the monitor to bind to the interface.