1. © 2004 Cisco Systems, Inc. All rights reserved. Operating and Configuring Cisco IOS Devices Starting a Router INTRO v2.0—8-1

2. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-2 Outline Overview Initial Startup of Cisco Routers Initial Setup of the Router Logging In to the Router Keyboard Help in the Router CLI Enhanced Editing Commands Router Command History Showing the Router Initial Startup Status Summary

3. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-3 System startup routines initiate router software Router falls back to startup alternatives if needed Initial Startup of the Cisco Router

4. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-4 Unconfigured vs. Configured Router Bootup Output from the Router

5. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-5 Setup: The Initial Configuration Dialog

6. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-6 Setup Interface Summary Interfaces Found During Startup

7. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-7 Setup Initial Global Parameters

8. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-8 Setup Initial Protocol Configurations

9. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-9 Setup Interface Parameters

10. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-10 Setup Script Review and Use

11. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-11 Logging in to the Router

12. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-12 You can abbreviate a command to the fewest characters that make a unique character string. Router User-Mode Command List

13. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-13 You can complete a command string by entering the unique character string, then pressing the Tab key. Router Privileged-Mode Command List

14. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-14 Router Command-Line Help Facilities

15. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-15 Router Context-Sensitive Help

16. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-16 Router Context-Sensitive Help (Cont.)

17. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-17 Router>Shape the future of internetworking by creating unpreced Shape the future of internetworking by creating unprecedented value for customers, employees, and partners. Enhanced Editing Commands

18. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-18 Enhanced Editing Commands (Cont.)

19. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-19 Router Command History

20. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-20 show version Command

21. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-21 Viewing the Configuration

22. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-22 Displays the current and saved configuration show running-config and show startup-config Commands

23. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-23 Summary The startup of a Cisco router requires verifying the physical installation, powering up the router, and viewing the Cisco IOS software output on the console. The router startup sequence is similar to the startup sequence of the Catalyst switch. The router first performs POST, then the router finds and loads the Cisco IOS image. Finally, it finds and loads the device configuration file. Use the enable command to access the privileged EXEC mode from the user EXEC mode. The Cisco router uses Cisco IOS software with extensive command-line input help facilities, including context-sensitive help.

24. © 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—8-24 Summary (Cont.) The Cisco IOS CLI includes an enhanced editing mode that provides a set of editing key functions. The Cisco router CLI provides a history or record of commands that have been entered. This feature, called the command history, is particularly useful to help recall long or complex commands or entries. After logging in to a Cisco router, the initial startup status of a router can be verified using the router status commands: show version, show running- configuration, and show startup-configuration.