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Technology - IP Routing & Addressing Crisis 2 - Forwarding Information Base

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Last updated: 12 Dec 2007 Update History

Report Status: Archived

Report Pages: 15

Analyst: Robin Whittle

Synopsis

We discuss the three major Forwarding Information Base (FIB) techniques by which a router can classify incoming packets to decide which of its interfaces to forward the packet on: Ternary Content-Addressable Memory (TCAM), Tree-Bitmap and similar algorithms and direct memory lookup. The FIB and RIB tasks of routers are the fundamental determinants of Internet routing system scalability.

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