Building Scalable Cisco Networks

In Building Scalable Cisco Networks you will study a broad range of technical details on topics related to routing, including routing principles, IP addressing issues such as variable-length subnet masks (VLSMs), route summarization, and protocol redistribution. The routing protocols Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (EIGRP), and Border Gateway Protocol (BGP) are investigated in detail. Configuration examples and sample verification output demonstrate troubleshooting techniques, and a case study is used throughout the book to review key concepts and to discuss critical issues surrounding network operation. Chapter-ending configuration exercises and review questions illustrate and help solidify the concepts presented in the book. This will start you down the path for attaining your CCNP or CCDP certification, as this book provides in-depth information on Cisco Routing exam topics.

• Understand the principles of classful and classless routing and the difference between link-state and distance vector protocol behavior
• Select and configure the appropriate services for simplifying IP address management at branch offices by proper address allocation and summarization
• Implement the appropriate technologies for a scalable, routed network that uses link-state protocols and redistribution
• Configure edge routers to properly interconnect to a BGP network through either a single or multihomed interconnection
• Control and optimize routing update information by implementing filters, metrics, and policy-based routing and changing administrative distance
• Examine case studies that show you how to build a scalable internetwork including multiple routing protocols

Contents

Foreword ... xxiii
Introduction ... xxiv
Part I: Scalable Internetworks ... 2
Chapter 1: Routing Principles ... 4
Chapter 2: Extending IP Addresses ... 64

Part II: Scalable Routing Protocols ... 96
Chapter 3: Configuring OSPF in a Single Area ... 98
Chapter 4: Interconnecting Multiple OSPF Areas ... 174
Chapter 5: Configuring EIGRP ... 246
Chapter 6: Configuring Basic Border Gateway Protocol ... 310
Chapter 7: Implementing BGP in Scalable Networks ... 380

Part III: Controlling Scalable Internetworks ... 450
Chapter 8: Optimizing Routing Update Operation ... 452
Chapter 9: Implementing Scalability Features in Your Internetwork ... 530

Part IV: Appendixes ... 574
Appendix A: Job Aids and Supplements ... 576
Appendix B: Router Password Recovery Procedure ... 654
Appendix C: Summary of ICND Router Commands ... 660
Appendix D: Summary of BSCN Router Commands ... 676
Appendix E: Open Systems Interconnection (OSI) Reference Model ... 692
Appendix F: Common Requests For Comments ... 706
Appendix G: Answers to the Review Questions ... 712
Appendix H: Configuration Exercise Equipment Requirements and Backbone Configurations ... 740
Appendix I: Glossary ... 758
Index ... 788