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OSPF Network Design Solutions, Second Edition by Thomas M. Thomas

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Summarization with OSPF

IP address assignment and route summarization are inextricably linked when designing OSPF networks. To create a scalable OSPF network, you should implement route summarization, thus allowing you to reduce the memory requirements on a router. You must exercise caution and consider the impact of a large number of route entries if you are not going to use summarization. To create an environment capable of supporting route summarization, you must implement an effective hierarchical addressing scheme. The addressing structure that you implement can have a profound impact on the performance and scalability of your OSPF network. The ultimate goal is to put as few routes as possible into the routing tables and reduce the number ...

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