Cisco CCNA 2 Instructor Manual page 102

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
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