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ACRC: Advanced Cisco Router Configuration (CCNP Certification Courseware Series)
     

ACRC: Advanced Cisco Router Configuration (CCNP Certification Courseware Series)

by Cisco Systems, Inc., Laura Chappell
 
Designed as a continuation of the Introduction to Cisco Routers Cisco Press book, this advanced guide teaches readers to configure Cisco routers for scalable operation in large and/or growing multiprotocol internetworks. The book s content focuses primarily on those scalable technologies and Cisco IOS Software features that are most useful in managing networks, is

Overview

Designed as a continuation of the Introduction to Cisco Routers Cisco Press book, this advanced guide teaches readers to configure Cisco routers for scalable operation in large and/or growing multiprotocol internetworks. The book s content focuses primarily on those scalable technologies and Cisco IOS Software features that are most useful in managing networks, is based solely on the actual Advanced Cisco Router Configuration (ACRC) course, which is one of the most highly recommended courses to individuals pursuing Cisco certifications today. After completing this book, readers will be able to define operation in large or growing multiprotocol internetworks. This book includes details on configuringaccess lists, queuing, tunneling, scalable routing protocols route redistribution, route summarization, dial-on demand routing, dial backup, compression, and the integration of bridging with a routed network. There are no books available today which can compete with the actual Cisco training courseware provided in this guide. Each section consists of technical training with numerous configuration examples and concludes with a section test. To complete the training and evaluate readers development level, a Certification Assessment Test will be contained on the cd included with this book.

Product Details

ISBN-13:
9781578700745
Publisher:
Cisco Press
Publication date:
11/13/1998
Series:
CCNP Certification Courseware Series
Edition description:
BK&CD-ROM
Pages:
704
Product dimensions:
7.71(w) x 9.45(h) x 1.82(d)

Related Subjects

Read an Excerpt


Chapter 11: Optimizing Routing Update Operation

This chapter discusses some of the more commonly used capabilities for controlling when and how routers receive and send routing updates. The capabilities covered include passive interfaces, default routes, static routes, route filtering, and redistributing routes between different routing protocols.

Understanding these capabilities and configurations enables you to design and configure the most efficient routing environment.

CONTROLLING ROUTING UPDATE TRAFFIC

Thus far, you have learned a variety of routing protocols and how they propagate routing information throughout an internetwork. There are times, however, when you do not want routing information propagated, as in the following examples:
  • When using an on-demand WAN link-You may want to minimize, or stop entirely, the exchange of routing update information across this type of link; otherwise, the link will remain up constantly.

  • When you want to prevent routing loops-Many companies have large enough networks where redundant paths are prominent. In some cases, for example, when a path is learned to the same destination by two different routing protocols, you may want to filter the propagation of one of the paths.

When you want to preserve bandwidth-Available bandwidth becomestraffic a precious resource as networks grow. You can ensure maximum bandwidth availability for data traffic by reducing unnecessary routing update traffic

This section discusses the following ways you can control or prevent routing update exchange and propagation:

  • Passive interface-Prevents all routing updates from being sent through an interface. For EIGRP and OSPF, this method includes hello protocol packets.

  • Default routes-Instructs the router that if it does not have a route for a given destination, to send the packet to the default route.

  • Static routes-A route to a destination that you configured in the router. In contrast, dynamic routes are those learned via routing protocol such as RIP or EIGRP.

  • Route update filtering-doUse access lists to filter route update traffic about specific networks.

In order to make these capabilities effective, you must know your network traffic patterns and know what the intended goal is when applying the capabilities. If you do not know the problem you want to resolve when using these capabilities, you will not know how to verify that they are being effective.

Meet the Author


Cisco Systems, Inc. is the leading global supplier of internetworking solutions, including routers, LAN and ATM switches, dial-up access servers, and network management software. The core of this book is a collaboration of multiple authors and experts over time to develop the definitive course in advanced Cisco router configuration.

Laura Chappell is the Senior Protocol Analyst for The Network Analysis Institute, LLC. She is an established industry speaker, writer, and consultant who focuses on protocol-level communications to provide troubleshooting, design, and optimization information throughout the world. Laura has been providing Cisco SE/CSE training on IPX/SPX protocol implementation, troubleshooting, and analysis since 1992, and has written numerous books and articles on a variety of networking subjects.

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