A network engineer configures Flexible NetFlow on a router to export flows to a collector at 10.50.0.20. The flow monitor and record are applied to interface GigabitEthernet0/1 in the ingress direction, and 'show flow monitor NET-MON cache' displays active flows. However, the collector receives no data. The exporter is configured with 'destination 10.50.0.20' and 'transport udp 2055'. From the router, 'ping 10.50.0.20' succeeds using the global routing table. The collector reachability is confirmed and its firewall permits UDP 2055. Which command output would BEST confirm whether the router is actually attempting to export the collected flows?