To enable Netflow in a interface is divided into two phase. Below are the steps for enabling netflow in router.

Phase 1

Go to configuration mode of Router using the below command:

Router> enable

Then , go to global configuration mode using the below command:

router# config t

Then , configure the gigaethernet interfaces using the following commands:

(config-if)# interface gigaethernet 0/0
(config-if)# ip route-cache flow
(config-if)# exit
(config-if)# interface gigaethernet 0/1
(config-if)# ip route-cache flow
(config-if)# exit

Phase 2

Set the destination for the Netflow using following command:

(config-if)#ip flow-export version 5
(config-if)#ip flow-export 220.225.223.10 3001
(config-if)#exit

Save the running configuration as startup configuration using following command:

router#copy running-configuration startup-configuration