Managing Routing Protocols

Routing, introduced in Chapter 2, "Deploying Interior Routing Protocols," is crucial to the proper operation of your network. The routing function of a network is like the circulatory system of the human body: It is responsible for moving vital elements (data or blood cells) through a network efficiently. When those vital elements fail to reach their intended destinations, you can expect the systems that feed oft the network to suffer (this applies to both internetworks and humans).

Chapter 2 covered basic routing configuration, but routing involves much more than simply enabling RÏP. IGRP, OSPH and EIGRP and letting them run. In a real-world network, routing protocols must be managed, extended, and optimized to promote overall network stability, flexibility, and efficiency. This chapter covers the key techniques that help you achieve these objectives.

The main topics of this chapter are

• Configuring Passive Interfaces

• Filtering Routing Updates

• Managing Redistribution

• Resolving Issues with VLSM and Classful Routing Protocols

• Leveraging Default Routing

• Configuring Route Summarization

• Deploying Policy Routing with Route Maps

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