This is an updated audio version of the Netflow export video previously put online. I covered the basics to enabling netflow on your device for particular interfaces, creating an SNMP group and user for the collector to use, and setting up the actual export to a remote server collector listening for flow packets.
For basic netflow configuration, it comes down to 3 simple steps:
1.) enable netflow on the interfaces you’d like to monitor using the following commands while in the interface configuration:
R1(CONFIG-IF)#ip flow ingress
R1(CONFIG-IF)#ip flow egress
2.) Create an SNMP group and user for the collector to use as seen later in the video.
R1(CONFIG)#snmp-server group GROUP v3 priv
R1(CONFIG)#snmp-server user USER GROUP v3 auth sha cisco priv aes 128 cisco
(Take note, the authentication and privacy modes used in the v3 user above can be changed, but your collector has to have a credential set matching whatever you use. Also, don’t use cisco for your password in production.)
3.) Configure the export command.
R1(CONFIG)#ip flow-export destination x.x.x.x ## (x.x.x.x being the ip of the flow collector, ## being the listening port.)
Now you just have to configure your particular flow collector or use the “show cache flow” command to view flow data.