Chapter 13

Router Architectures

Architecture starts when you carefully put two bricks together. There it begins.

Ludwig Mies van der Rohe


In this chapter, we present an overview of router architectures. We list the critical functions of a router, besides forwarding a packet. For the different network sizes deployed, routers are designed to be of different sizes and handling capabilities in terms of address lookup. Therfore, we present a classfication of routers into four categories: shared CPU architecture, shared forwarding engine architecture, shared nothing architecture, and clustere architecture.


router; functions and components of a router; routing versus forwarding; types of routers; elements of a router; ...

Get Network Routing, 2nd Edition now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.