Chapter 17. Implementing Redistribution and Controlling Routing Updates


This chapter covers the following topics, which you need to understand to pass the CCNP/CCDP/CCIP BSCI exam:

  • Understanding the fundamentals of redistribution

  • Identifying the issues with redistribution

  • Understanding the routing decisions that affect redistribution

  • Controlling routing updates during redistribution

  • Configuring redistribution

  • Configuration commands to control routing updates in redistribution

  • Controlling routing updates with filtering

  • Verifying, maintaining, and troubleshooting the implementation of redistribution and filtering

The topics in this chapter deal with the traffic generated by routing updates in terms of both the network resources that they use and the information contained within them. This covers two different but related areas, redistribution and filtering. The network overhead involved in routing updates has already been dealt with in other chapters. It keeps recurring as a theme because all network traffic directly influences the network's capability to scale or to grow.

The information propagated through the network is complex when dealing with one routing protocol. When multiple protocols have to share information (through redistribution) so that the larger network can see every route available within the autonomous system, the information flow must be controlled and managed very closely with filtering and other solutions.

This chapter deals with the need for redistribution, which increases the network overhead, and filtering, which is used to reduce overhead. The chapter explains the design issues that might affect the configuration, followed by configuration examples of route redistribution and filtering.

CCNP BSCI Exam Certification Guide
CCNP BSCI Exam Certification Guide (CCNP Self-Study, 642-801) (3rd Edition)
ISBN: 1587200856
EAN: 2147483647
Year: 2002
Pages: 194
Authors: Clare Gough © 2008-2017.
If you may any questions please contact us: