Cisco Netflow performance data


Not much of a post but link to the Cisco site stating how much Netflow loads the Cisco routers: Netflow data sheet I, personally, do a lot of Netflow monitoring and can say that on unloaded routers , passing 2-5 mbits/sec of traffic, the additional load will be some 1-2% of CPU cycles. For the most loaded pair of routers I do monitoring for , two Cisco 2800 passing about 70 Mbits/sec of traffic and creating about 900 Mbytes of Netflow data a day each, enabling Netflow added 8% of CPU load and they cope with it perfectly well.