Case Study

The large multinational company Humugos has offices in 250 countries. Each country operates as a separate company, conforming to the tax and legal laws of the country. It is still important that the parts of organization be capable of connecting to one another, but EIGRP is no longer feasible for a number of reasons. The main issue is the number of connections that each country has into the Internet. There is also some need to manipulate the traffic, particularly in terms of resource sharing between business units internationally.

Figure 8-2 illustrates the network topology of the case study, Humugos.

NOTE Figure 8-2 has been simplified and does not contain the 250 autonomous systems as the case study suggests.

BGP-4 has been suggested as a solution for various reasons. First is the need for yet another level of hierarchy. Second, the multiple connections to the Internet need to be managed with a sophisticated routing protocol. The capability to determine the traffic path that will be taken by a variety of parameters is also very important. This adds another dimension to the simple metric, which proves inadequate to the task of determining subtle distinctions in path selection.

Figure 8-2 Diagram of Case Study—Humugos

Figure 8-2 Diagram of Case Study—Humugos

This chapter introduces the concepts behind BGP-4 that make it the ideal solution for Humugos to use both between countries and in its connections into the Internet.

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