Cisco IOS Command Line Interface Honolulu Community College Cisco Academy Training Center Semester 2 Version 2.1

Overview n 1. This chapter introduces the Cisco IOS, software user interface for the router. n 2. Covers: u Logging in and logging out. u User-mode - to check router status. u Privileged mode -access to config mode. u Help features. u Editing features.

Logging in n Initially connect thru console port on router. n AUX port is for modem connection. n After logging, get a user-mode prompt, >. n User-mode give limited set of commands. n ENABLE command. u privileged-mode - full set of commands. u Prompt is the pound sign, #. n EXIT to log out of the router. n DISABLE to go back to user mode.

User-Mode Commands n ? To display list of commands.

User-Mode Commands n Spacebar or Return at “More” prompt

Privileged-Mode n Privileged-mode gives full command set. n Used to go into global configuration mode. n From the privileged prompt, #, the ? will give a list of available commands.

Help Functions n At any point in entering a command, the ? will give the options for the next part of the command.

Editing Commands

Command History n The user interface provides a history or record of commands you have entered. n Default is last 10 commands saved. n Terminal history size can change this to up to 256. n Use up arrow and down arrow to retrieve commands.

Summary n Two primary modes in Cisco IOS. u User-mode: limited checks on configuration status. u Privileged-mode: detailed examination of router configuration, remote access, debugging, access to configuration mode. n Help functions (?), and editing (command history) are useful when making changes to router configuration.