Sample Network for Case Studies

In order to demonstrate the applicability of multiple concepts discussed in this chapter, a base network that resembles a medium-sized ISP network is necessary. It has a total of 168 routers in 14 POPs across the continental U.S. Refer to Figure 9-1 for most of the configurations and case studies in this chapter.

Figure 9-1. Sample Network for Case Studies

The network is divided into four regions:

  • Northeast

  • Central

  • Southeast

  • West

Each region is composed of four or five Points of Presence (POPs). Between POPs in a region, there's OC-48 connectivity; between regions, there's OC-12.

All POPs consist of two WAN routers ...

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