Cisco NetFlow IOS And IOS XE

Cisco IOS Steps

Configure the following on the interface you want to capture netflows on. Most cases you would enable on WAN and LAN


interface gig0/0/0
description WAN
ip nbar protocol-discovery
ip flow ingress


interface gig0/0/1
description LAN
ip nbar protocol-discovery
ip flow ingress

Now Configure your Flow Exporter

You will export to your netflow server via the LAN interface unless its cloud based.


ip flow-export source GigabitEthernet0/0/1

Change the IP address and the port destination


ip flow-export destination 192.168.1.5 9999

Cisco IOS XE is a lot different to configure NetFlow here are the steps

First let configure our netflow exporter

flow exporter netflow
destination 192.168.1.5
source GigabitEthernet0/0/1
transport udp 9999
export-protocol netflow-v5

Now Let configure the netflow Monitor


flow monitor netflow
exporter netflow
record netflow-original

Now configure your interfaces


Interface gig0/0/0
description WAN
ip flow monitor netflow input
ip nbar protocol-discovery


Interface gig0/0/1
description LAN
ip flow monitor netflow input
ip nbar protocol-discovery

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