Cisco Systems CCNA 2 manual Examining the show commands

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?

3.1.4Examining 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-configcommand 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-configcommand 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

30 - 238 CCNA 2: Routers and Routing Basics v3.1 Instructor Guide – Module 3 Copyright ♥ 2004, Cisco Systems, Inc.