Reading Time: 2 minutes
To ensure that the necessary hardware is enabled, issue the show module command, as follows:
show module all Mod Submodule Model Serial No. Hw Status ----+-----------------------+-----------------+------------+----+--------- 1 Netflow Services Card WS-F4531 JAB062209CG 0.2 OkNote If the NetFlow module is available, you should see something like the above.
The following sequence of IOS commands can be used as a model for configuring NetFlow.
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 x.x.x.x 6343 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 router-2621(config)#snmp-server ifindex persist router-2621(config)#^Z router#writeNote In the above example, the ip flow-export destination « x.x.x.x » is the IP address of the BLËSK monitoring server. The « 6343 » in the ip flow-export destination command example corresponds to the Local Collector UDP Port number configured for the NetFlow plugin. The flow export source interface will vary, depending on the interface providing the source traffic.
