Case Study

Returning to the company, you will recall that in the previous chapter, was acquired along with some other companies. The company is still operating intact but must communicate with the other companies and with the holding company that purchased it. Most of the communication occurs with the parent company, although there is occasional work done on a project basis with the other companies. The parent company needs to be capable of communicating with all the small companies that it holds.

The infrastructure within the companies is to stay the same, but a Frame Relay network has been created to connect the sites. OSPF has been implemented internally at, and it is working well. Now it is necessary to implement OSPF at the other sites and to have a complete understanding of all the networks available.

The network administrators have been charged with making this happen. There is more to be done than simply typing in the appropriate commands, of course. The administrators need to understand and decide on several things. These include whether summarization is possible and desired for the Frame Relay design, what design is appropriate for the OSPF areas, and whether any of the areas should be stub, totally stubby, or not so stubby areas. To make these decisions, the administrators must understand the OSPF operation over multiple areas. This chapter addresses these subjects and then, in the final section, shows the configuration options and requirements.

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