As more and more companies in Qatar implementing Nagios , we get question everytime how to configure Cisco devices to send netflow to Nagios . See some tips here . You can call us for support as we are partner of both Cisco and Nagios in Qatar .

Assume 10.10.1.222 is Nagios server .

Swtches .

configure terminal
interface Ethernet0/0
ip route-cache flow
exit
ip flow-export 10.10.1.222 9912 version 5
exit
clear ip flow stats

ASA .

configure terminal
flow-export destination inside 10.10.1.222 9911
flow-export template timeout-rate 1
flow-export delay flow-create 60
logging flow-export-syslogs disable

access-list netflow-export extended permit any any
class-map netflow-export-class
match access-list netflow-export
policy-map global-policy
class netflow-export-class
flow-export event-type all destination 10.10.1.222
exit