Basic Lab Overview

This lab will introduce the Cisco Internetwork Operating System (IOS) command line interface (CLI). You will need to logon to a router and become familiar with the different levels of access on the router. You will also become familiar with the commands available to you in each mode (user or privileged) and the router help facility, history, and editing features.

User vs. Privileged Mode
User mode is indicated with the '>' next to the router name. You can look at settings but can not make changes from user mode. In Privilege mode (indicated by the '#', you can do anything. To get into privilege mode the keyword is ENABLE.
Router>
Router>enable
Password:
Router#
HELP
To view all commands available from this mode type: ? and press: enter This will give you the list of all available commands for the router in your current mode. You can also use the question mark after you have started typing a command. For example if you want to use a show command but you do not remember which one it it use show ? this will output all commands that you can use with the show command.
r1#show ?
access-expression List access expressionaccess-lists List access listsbackup Backup statuscdp CDP informationclock Display the system clockcls DLC user informationcompress Show compression statisticsconfiguration Contents of Non-Volatile memory--More--
Configuration Mode
From privilege mode you can enter configuration mode by typing CONFIG T you can exit configuration mode type type
END or +z
Router#config t
Router(config)#end
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