30 - 238 CCNA 2: Routers and Routing Basics v3.1 Instructor Guide – Module 3 Copyright © 2004, Cisco Systems, Inc.
Discuss the differences between the various passwords. Students need to understand when
each password is used. If students ask if user ids and passwords can be used instead of just
passwords, the answer is that they can, but that is beyond the scope of this course.
Ask students the following questions:
• What is the command to set the enable password?
• What is the command to set the telnet password?
• What is the command to set the console password?
3.1.4 Examining the show commands There are many show commands, which are used to examine the contents of files in the router
and for troubleshooting. From each mode in the router, the show ? command can be used to
see all the available options. Some of the show command options are as follows:
• show interfaces
• show controllers serial
• show clock
• show hosts
• show users
• show history
• show flash
• show version
• show ARP
• show protocol
• show startup-configuration
• show running-configuration
Students may want to use the show running-config command as their primary
troubleshooting tool. This is not a good habit. It is probably the quickest way to find problems
in the simple configurations used in this course. However, that is not true in most situations.
Students should learn to use the show running-config command to confirm suspected
problems. Some CLI shortcuts to show students in the future are as follows:
• sh int fa0/0 for show interface fastethernet 0/0
• sh run for show running-configuration
• sh run int fa0/0 for show running-configuration fastethernet 0/0