Chapter 5. Shooting Trouble with Ethernet
A solid understanding of Ethernet is as essential as supporting TCP/IP today. Many people have been using Ethernet since they started networking. Others have used it since the “frozen yellow garden hose” days of 10BASE5. You have used it in all the scenarios and Trouble Tickets thus far and will continue to use it throughout the book and in the real world. Understanding and supporting Ethernet not only applies to the CCNP certification but to all industry certifications. This chapter assumes your understanding of the information from the previous chapters, including protocols, models, troubleshooting methods, support tools, and resources.
In this chapter you combine some of the tasks from the preceding two chapters to build this chapter's scenario. Following the scenario is a review of Ethernet concepts, symptoms, problems, and action plans. To help you gain practical experience, this chapter contains several walk-through scenarios and practical Trouble Tickets for you explore. For those of you who do not have equipment handy, there are many relevant figures, examples, and explanations so that you, too, can shoot trouble with Ethernet.
This chapter covers the following topics:
Scenario: Shooting Trouble with Ethernet
A Brief Summary of Ethernet
Ethernet Frames
Ethernet Addressing
Ethernet at the Physical Layer
Shooting Trouble with Ethernet
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. |