Router Distributed Switching - VIP

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This is a review of Cisco router switching modes. It is recommended that a review of Cisco’s router product line and a detailed understanding of the various router platforms such as small, medium and high-end routers be completed prior to any examination. Cisco uses various types of switching caches to reduce switching delay. In the case of Fast Switching, the Switch Processor is only needed to build a route table for the first packet and NOT needed afterward.In other cases, such as Autonomous Switching, the packet is encapsulated and returned to the Interface Process Buffer without being sent to the Route Processor.

Distributed Switching is based on VIP [Versatile Interface Processor] cards which have onboard switching processors. With VIP, even the first packet does not go through the route processor to determine the switching path or route increasing router efficiency.

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[tags]cisco,router distributed switching,vip,versatile interface processor[/tags]