O'Reilly logo

CCNA Certification All-In-One For Dummies by Silviu Angelescu

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 7: Troubleshooting a Switch Using Cisco IOS

Exam Objectives

Describing Cisco hardware and software products and their purposes

Gathering troubleshooting information about a Cisco switch

Inspecting Cisco switch memory contents

Using the show tech-support and the debug commands to inspect a Cisco switch

Troubleshooting switch connectivity

Gathering troubleshooting information about your network

Discovering your network using Cisco Discovery Protocol (CDP)

Troubleshooting the startup configuration

Troubleshooting the running configuration

Troubleshooting a Cisco switch is very similar to troubleshooting a Cisco router. Most IOS troubleshooting commands, such as the debug command, are the same for switches and routers, but the output differs in some cases. Most troubleshooting tools are available for both switches and routers, such as the ping and trace route tools, or the Cisco Network Assistant (CNA). Some troubleshooting tools are only available for routers, such as the Cisco Router and Security Device Manager (SDM) and SDM Express. Other troubleshooting tools are only available for switches, such as the Cisco Device Manager. You learn about switch troubleshooting tools and IOS commands in this chapter.

Troubleshooting Cisco Switches

Read this section to find out how to troubleshoot your Cisco switch using IOS commands and graphical user interface tools, such as the Cisco Device Manager and the Cisco Network Assistant (CNA).

Gathering information about the switch

There ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required