Managing Your Network Environment © 2004 Cisco Systems, Inc. All rights reserved. Managing Cisco...

Managing Your Network Environment

© 2004 Cisco Systems, Inc. All rights reserved.

Managing Cisco IOS Devices

INTRO v2.0—9-1

© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—9-2

Outline

• Overview

• Cisco IOS File System and Devices

• Managing Cisco IOS Images

• Managing Device Configuration Files

• Cisco IOS copy Command

• Executing Adds, Moves, and Changes

• Using debug on Operational Cisco Devices

• Summary

• Lab Exercise 9-1: Gathering Information About Neighboring Devices and Using System Files


Cisco IOS File System and Devices


Managing Cisco IOS Images


• Verify that flash memory has room for the Cisco IOS image.

Verifying Memory and Deciphering Image Filenames


• Back up current files prior to updating flash memory.

Creating a Software Image Backup


Upgrading the Image from the Network


Device Configuration Files


Cisco IOS copy Command

• NVRAM

• Terminal

• TFTP server

• Erase start


Cisco IOS copy Command Example


copy run tftp and copy tftp run Commands


Adding New Devices to the Network

1. Determine the IP address to be used for management purposes.

2. Configure administrative access for the console, auxiliary, and vty interfaces.

3. Configure passwords for the privileged EXEC mode for the device.

4. Configure the network management access to the device.

5. Determine the IP address to assign to each interface.

6. Configure the new device with the appropriate configuration.


Moving Devices on the Network

• Determine what to do with the obsolete equipment.

– Which devices connect to the equipment being moved?

– Will the move and reconfiguration affect the security policy?

– Does the device play a role that no other devices play?

• Review the facilities for the new location.

• After the move, test network connectivity.


Changing the Hardware

Hardware changes• Power down the equipment or use OIR.

• Make sure the appropriate modules are available.

• Read the hardware installation manual.

• Verify the policies of your organization.

Cisco IOS software changes• Does the new version support the current and future features

you need?

• Does your platform have sufficient RAM and flash memory to support the feature set?


show and debug Commands


Considerations When Using debug Commands

• May generate output in a variety of formats that may not identify the problem

• Require high overhead, possibly disrupting network device operation

• Useful for obtaining information about network traffic and router status


Commands Related to debug


Summary

• The Cisco IOS File System feature provides a single interface to all the file systems (NVRAM, RAM, TFTP, Flash) that a router uses.

• As a network grows, storage of the Cisco IOS software and configuration files on a central server enables control of the number and revision level of software images and configuration files that must be maintained.

• Having proper backup of the current device configuration stored in a TFTP server can help reduce device downtime.


Summary (Cont.)

• The Cisco IOS software copy commands can be used to move configurations from one component or device to another, such as RAM, NVRAM, or a file server.

• Network equipment is often moved from one location to another, removed from the network, or the configuration may change. The process is referred to as adds, moves, and changes.

• The show and debug commands are built-in tools for troubleshooting. The show command is used to display static information, while the debug command is used to display dynamic data.

Managing Your Network Environment © 2004 Cisco Systems, Inc. All rights reserved. Managing Cisco...

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