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EIGRP Network Design Solutions by Ivan Pepelnjak

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Chapter 6. EIGRP Route Summarization

The case studies in Chapter 5, "Scalability Issues in Large Enterprise Networks," illustrated the need for hierarchical network design and a corresponding IP addressing scheme. In this chapter, you'll see two scalability tools that you can use in hierarchical networks with a good IP addressing scheme: autosummarization, which can be used to implement automatic summarization on major network boundaries, and manual per-interface summarization, which can be used where summarization behavior has to be fine-tuned. But before going into technical details, let's take a look at another case study illustrating the potential summarization drawbacks.

Case Study—Connectivity Loss Following Private IP Address Deployment ...

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