Cisco Systems CCNA 2 manual Managing the Cisco File System, Additional Resources

If the router does not boot properly, the show version command can be used to identify the configuration register setting. The boot field indicates where the router is configured to boot from and the config-registercommand is used to make any necessary changes.

If the router IOS does not boot properly, there are several things that could be wrong:

•Boot system statement in configuration file

•Incorrect configuration register value

•Corrupted flash image

•Hardware failure

Instruct students to use the show version command to check the configuration register value. When a router does not boot properly it is usually because the configuration register setting is incorrect. For students to understand the impact that the boot sequence and the configuration register has on routing, they must perform the hands-on labs. Make sure each student can complete and explain the labs. Discuss the results and purpose of the labs after they have been completed by all of the students.

Instruct students to verify the configuration register setting on a regular basis. Occasionally change the configuration register settings and allow them to troubleshoot the errors that occur.

Additional Resources

http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a00800a65 a5.shtml

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_command_summary_cha pter09186a00800801b1.html

5.2 Managing the Cisco File System

Essential Labs:	5.2.3, 5.2.5, 5.2.6a, and 5.2.6b
Optional Labs:	None
Core TIs:	All
Optional TIs:	none

Course-Level Claim: Students can manage system image and device configuration files.

Certification-Level Claim: Students can manage system image and device configuration files.

Hands-on skills: none

54 - 238 CCNA 2: Routers and Routing Basics v3.1 Instructor Guide – Module 5 Copyright ♥ 2004, Cisco Systems, Inc.