Chapter 7. Shooting Trouble with VLANs on Routers and Switches
This chapter continues the practical switching focus and includes a number of objectives falling under the CCNP troubleshooting guidelines. Understanding and supporting Ethernet switches, routers, and virtual LANs (VLANs) applies to all of Cisco's current certifications. A solid understanding of VLANs and the role of routers and switches in the internetwork is essential in your practical studies. This chapter assumes knowledge of the previous chapters, but in particular of Chapter 3, “Shooting Trouble with IP,” Chapter 5, “Shooting Trouble with Ethernet,” and Chapter 6, “Shooting Trouble with CatOS and IOS.”
You build the chapter scenario to assist you in supporting routing and switching using VLANs. The chapter reviews VLAN concepts, symptoms, problems, and action plans while you configure your VLANs. As you are used to by now, throughout the chapter there are several walk-through scenarios and practical Trouble Tickets for you to explore. For those of you who do not have equipment handy, I include many relevant figures and examples so that you too can shoot trouble with VLANs.
This chapter covers the following topics:
Scenario: Shooting Trouble with VLANs on Routers and Switches
Why VLANs?
Trunking
Managing VLANs
Inter-VLAN Routing
Route Switch Technologies
Shooting Trouble with VLANs
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. |