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Showing posts from August, 2009

NetFlow: Tips on How to Analyze Your Network’s Bandwidth

Guest Post by Daniel Cawrey:

Though it is still a relatively new concept to network monitoring, NetFlow is often times unheard of by many IT professionals, having not even had the experience of working with it. But it’s such an interesting technology that I’m convinced that there are other applications for flow concepts in IT, perhaps on the web in terms of social media or some other yet-unknown element of personal computing. Regardless, here is an intro on what you need to know to analyzing bandwidth.

So, what is NetFlow? It was developed by Cisco, one of the stalwarts of the networking industry. Cisco decided to integrate NetFlow into many of its networking devices such as switches and routers. Today, many other networking companies have adopted NetFlow, and it has become somewhat of a defacto standard. There are other versions of flow on the market, but for the most part networking professionals use NetFlow.

A flow itself can be best defined as a sequence of packets that travel in…