The Exporter router is the Cisco router running IOS 5.6(2)T configured to collect and export NetFlow records to the Linux host – Collector (192.168.3.2). They advertise the subnet 172.16.x.0/24 configured on the intevrface GigabitEthernet0/0. The BGP-1 and BGP-2 network devices are Cisco routers running Cisco IOS 15.6(2)T and are eBGP neighbors. Flexible NetFlow Configuration on Cisco DevicesĪ network topology is depicted in Picture 1. This post however, is more practical and provides the basic configuration steps for the deployment of Cisco Flexible NetFlow and Juniper j-Flow v8. Another blog post discusses the purpose, limitations, accuracy and the overhead of flow sampling. The post also explains differences across different vendor implementations of NetFlow, such as NetFlow, sFlow, IPFIX and NetStream. One of our recent blog posts dedicated to NetFlow technology provides the necessary knowledge needed to understand NetFlow principles and what it is used for.
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