Cisco Systems CCNA 2 manual Module 9 Basic Router Troubleshooting, Module 9 Caution

Module 9: Basic Router Troubleshooting

Overview

When teaching Module 9, emphasize the fact that the ability to interpret a routing table is of fundamental importance to networking professionals. This module is dedicated to routing tables and troubleshooting tools such as the show ip route command.

Module 9 Caution

Students need to understand how to use these commands and interpret their output. This module is usually very interesting to students.

Students who complete this module should be able to perform the following tasks:

•Use the show ip route command to gather detailed information about the routes installed on the router

•Configure a default route or default network

•Understand how a router uses Layer 2 and Layer 3 addressing to move data through the network

•Use the ping command to perform basic network connectivity tests

•Use the telnet command to verify the application layer software between source and destination stations

•Troubleshoot by sequential testing of OSI layers

•Use the show interfaces command to confirm Layer 1 and Layer 2 problems

•Use the show ip route and show ip protocol commands to identify routing issues

•Use the show cdp command to verify Layer 2 connectivity

•Use the traceroute command to identify the path packets take between networks

•Use the show controllers serial command to ensure the proper cable is attached

•Use basic debug commands to monitor router activity

101 - 238 CCNA 2: Routers and Routing Basics v3.1 Instructor Guide – Module 9 Copyright ♥ 2004, Cisco Systems, Inc.