June 2010
Intermediate to advanced
224 pages
5h 18m
English
Content preview from Network Flow AnalysisBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The History of Network Flow
High-speed router and switch hardware directs traffic without going to the operating system, in other words, without making each forwarding decision in software. Decisions on packet routing are made at the lowest level possible, generally within the hardware itself. Circa 1996, Cisco invented a method by which routing decisions were guided by flows. Subsequently, the value of flow information was realized, and it was made accessible to network administrators as a feature called NetFlow.
NetFlow Versions
NetFlow has undergone several revisions through its history.
NetFlow Version 1
NetFlow version 1 was the earliest Cisco release. Other vendors reverse-engineered the NetFlow reporting protocol and released their own NetFlow-compatible ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.