Chapter 3. Shooting Trouble with IP
This chapter focuses on a number of objectives falling under the CCNP Troubleshooting guidelines. Understanding basic TCP/IP troubleshooting principles not only applies to the CCNP certification but to all industry certifications. A solid understanding of how IP works is essential for troubleshooting any small, medium, or large network.
This chapter and the remaining chapters assume knowledge of the previous chapters, which deal conceptually with protocol characteristics, models, troubleshooting methods, support tools, and resources. Each chapter starts by introducing a hands-on chapter scenario. To gain practical experience, build the network in the scenario if at all possible and follow along. If that isn't possible, the content and explanations are detailed enough for you to learn from without needing the equipment in front of you. Several integrated walk-through scenarios and Trouble Tickets enable you to benefit from the added learning advantages offered by practical application. After the Shooting Trouble with IP scenario, I explore TCP/IP concepts, symptoms, problems, and action plans.
This chapter covers the following topics:
Scenario: Shooting Trouble with IP
Protocols and Packets
Addressing
Routing Protocols
Trouble Tickets
Trouble Tickets Solutions
Supporting Website FilesYou can find files and links to utilities that support this book on the Cisco Press website at www.ciscopress.com/1587200570. Even if you do not have a lab, you can take advantage of the supporting configuration files including the logs to understand device input and output. The files are listed throughout the chapters in italics. In order to be able to read and work with some of the supporting files offered at www.ciscopress.com/1587200570, you may want to download some of the programs listed in Table I-1 in the Introduction. |