Check that the IOS supports Netflow by adding “ip route-cache flow” to an interface. If the command is successful the IOS supports Netflow.
If the command errors on “flow” then upgrade IOS to a version that supports Netflow. Use Cisco feature navigator to find the correct IOS. Search by Feature, Add Netflow to the selected features.
Set Netflow for each interface
Interface Serial0/0
Ip route-cache flow
Bandwidth 1536
Exit
In global config
ip flow-export source FastEthernet0
ip flow-export version 5
ip flow-export destination 192.168.10.50 9996
ip flow-cache timeout active
ip flow-cache timeout inactive 15
snmp-server ifindex persist
Show IP flow export
Show IP cache flow
To collect NBAR stats
Ip cef
Interface S0/0
Ip nbar protocol-discovery
Show ip nbar protocol-discovery