![]() NetFlow, on the other hand, is used by network technicians to understand traffic, why congestion or heavy usage is happening, what is causing traffic changes and how these changes can be eliminated. The SNMP data is also used by network technicians to troubleshoot issues and to perform proactive hardware maintenance. This includes the devices themselves and the links between them. SNMP is used by operationally focused network technician and network managers that want to understand the key indicators that show problems in the health and operation of the network. ![]() This is process is similar to SNMP traps that are sent to the master station when an important change of status is detected. However, if a NetFlow enabled equipment doesn't receive IP traffic, flows are not created in the cache and are not exported to a collector. If any of the parameters don't match, a new flow is created in the cache.įlow records are then exported from exporters to one or more NetFlow collectors. The other packets that match the same parameters are aggregated to this flow and the bytes counter for the flow increases. In other words, NetFlow enabled devices examine each packet and the first unique packet creates a flow as an entry in NetFlow cache. This includes port, IP source, destination, and port numbers. These technologies export data that describes the exchange of information happening across the specific network device.
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