Cisco IOS® NetFlow technology is an integral part of Cisco IOS Software that collects and measures data as it enters specific routers or switch interfaces.
By analyzing NetFlow data, a network engineer can identify the cause of congestion; determine the class of service (CoS) for each user and application; and identify the source and destination network for traffic.
NetFlow allows extremely granular and accurate traffic measurements and high-level aggregated traffic collection. Because it is part of Cisco IOS Software, NetFlow enables Cisco product-based networks to perform IP traffic flow analysis without purchasing external probes--making traffic analysis economical on large IP networks.
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