Configure Netflow

Hi

I want to understand whats the different between set up Netflow using the below methods and which the best recommended procedure for setting up Netflow.

1.
On the Interface
router-2621(config)#interface FastEthernet 0/1
router-2621(config-if)#ip route-cache flow

On Router
router-2621(config)#ip flow-export destination 196.0.0.1 9996
router-2621(config)#ip flow-export source FastEthernet 0/1
router-2621(config)#ip flow-export version 5
router-2621(config)#ip flow-cache timeout active 1
router-2621(config)#ip flow-cache timeout inactive 15

2.
On interface
router-2621(config)#interface FastEthernet 0/1
router-2621(config-if)#ip flow ingress

On Router

router-2621(config)#ip flow-export version 9
router-2621(config)#ip flow-export destination 196.0.0.1 9996
router-2621(config)#ip flow-export template refresh-rate 15
router-2621(config)#ip flow-export template timeout-rate 90
router-2621(config)#ip flow-export template options export-stats
router-2621(config)#ip flow-export template options refresh-rate 25
router-2621(config)#ip flow-export template options timeout-rate 120
router-2621(config)#ip flow-cache entries 2046
router-2621(config)#ip flow-cache timeout active 20
router-2621(config)#ip flow-cache timeout inactive 130