Question : Cisco NetFlow requirements and packages

I am looking to take advantage of Cisco's Netflow protocol to better analyse traffic across my network.

I am currently purchasing another router for a new site in my network, I have the option of purchasing a Cisco 871 or a 1841, does the 871 support netflow?

Are there any recommendations on packages to capture and analyse netflow traffic? A free solution would be best to trial, but I am open to purchasing a commercial package if need be.

Answer : Cisco NetFlow requirements and packages

Hello,

you can use NetFlow Analyzer http://www.netflowanalyzer.com/ and configure you router to send netflow data (netflow data export) to ure Netflow analyzer server in order to have a graphical report.

here is an example to configure your router
 
router#enable
Password:*****
router#configure terminal

router-2621(config)#interface FastEthernet 0/1

router-2621(config-if)#ip route-cache flow

router-2621(config-if)#exit

router-2621(config)#ip flow-export destination 192.168.9.101 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 5
router-2621(config)#ip flow-cache timeout inactive 15
router-2621(config)#snmp-server ifindex persist
router-2621(config)#^Z
router#write

router#show ip flow export
router#show ip cache flow

For more information refer to :

To learn more about Cisco® NetFlow Services visit http://www.cisco.com/go/netflow

To learn more about Cisco® Netflow configuration visit http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/switch_c/xcprt3/xcdnfc.htm

To learn more about NetFlow Analyzer and Cisco® NetFlow Version Matrix compability visit http://www.netflowanalyzer.com/

Regards,