Routing protocols vary in their support for many features, including VLSM, summarization, scalability, and fast convergence. There is no best protocol—the choice depends on many factors. This section discusses the most common routing protocols for use within the enterprise and evaluates their suitability for given network requirements.
First, the interior routing protocols EIGRP, OSPF, and Integrated IS-IS are discussed, followed by a description of BGP.
NOTE Integrated IS-IS is not a recommended enterprise protocol for reasons described in this section.
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