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Cisco Express Forwarding and the Forwarding Information Base :: Fundamental Switch Operat

July 24, 2013 by Rowell Dionicio 1 Comment

CEF, or Cisco Express Forwarding, is a layer 3 switching technology. It’s an improvement over fast switching and route processor switching.

The FIB, or Forwarding Information Base, is a direct copy of the routing table. If a change occurs on the routing table, it is also reflected in the FIB.

CEF and FIB are a team. Together they are fast. CEF is known as a topology-based switching operation, hence the FIB. Because the information CEF uses is stored in cache, it is able to switch subsequent traffic flows much faster.

References: Understanding Cisco Express Forwarding (CEF)

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Filed Under: Network Engineering Tagged With: SWITCH

About Rowell Dionicio

I am Rowell Dionicio, a network engineer with a coffee addiction and a passion for Wi-Fi. Follow me on Twitter, LinkedIn, Facebook and YouTube.

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