2.5.3 Lab -Managing Switch Operating System and Configuration Files Challenge Answers

2.5.3 Lab -Managing Switch Operating System and Configuration Files Challenge Answers

Topology Diagram

Addressing Table

Learning Objectives

Upon completion of this lab, you will be able to:

• Create and save a basic switch configuration
• Set up a TFTP server on the network
• Back up the switch Cisco IOS software to a TFTP server and then restore it
• Back up the switch configuration to a TFTP server
• Configure a switch to load a configuration from a TFTP server
• Upgrade the Cisco IOS software from a TFTP server
• Recover the password for a Cisco 2960 switch (2900 series)

Scenario

In this lab, you will explore file management and password recovery procedures on a Cisco Catalyst switch.

Task 1: Cable and Initialize the Network

Step 1: Cable a network.

Cable a network that is similar to the one in the topology diagram. Then, create a console connection to the switch. If necessary, refer to Lab 1.3.1. The output shown in this lab is from a 2960 switch. If you use other switches, the switch outputs and interface descriptions may appear different.

Step 2: Clear the configuration on the switch.

Set up a console connection to the switch. Erase the configuration on the switch.

Step 3: Create a basic configuration.

Configure the switch with the following hostname and access passwords. Then enable secret passwords on the switch.

Create VLAN 99. Assign IP address 172.17.99.11 to this interface. Assign the FastEthernet 0/18 port to this VLAN.

Step 4: Configure the host attached to the switch.

Configure the host to use the IP address, mask, and default gateway identified in the Addressing table. This host acts as the TFTP server in this lab.

Step 5: Verify connectivity.

To verify that the host and switch are correctly configured, ping the switch IP address from the host.

Was the ping successful?

If the answer is no, troubleshoot the host and switch configurations.

Task 2: Starting and Configuring the TFTP Server

Step 1: Start up and configure the TFTP server.

The TFTP server that was used in the development of this lab is the SolarWinds server, available at http://www.solarwinds.com.

The labs in your classroom may be using a different TFTP server. If so, check with your instructor for the operating instructions for the TFTP server in use.

Start the server on the host using the Start menu: Start > All Programs > SolarWinds 2003 Standard Edition > TFTP Server.

The server should start up and acquire the IP address of the Ethernet interface. The server uses the C:\TFTP-Root directory by default.

Step 2: Verify connectivity to the TFTP server.

Verify that the TFTP server is running and that it can be pinged from the switch.

Task 3: Save the Cisco IOS File to the TFTP Server

Step 1: Identify the Cisco IOS filename.

Determine the exact name of the image file that is to be saved.

Note that if the file is in a subdirectory, you cannot initially see the filename. To see the Cisco IOS filename, first change the switch working directory to the Cisco IOS directory.

Examine the output from the switch and then answer these questions.

What is the name and length of the Cisco IOS image stored in flash? ______

Which attributes can be identified from the codes in the Cisco IOS filename?______

Step 2: In privileged EXEC mode, copy the image file to the TFTP server.

Step 3: Verify the transfer to the TFTP server.

Verify the transfer to the TFTP server by checking the log file. With the SolarWinds TFTP server, you can verify the transfer from the command window or from the server log file at:

C:\Program Files\SolarWinds\2003 Standard Edition\TFTP-Server.log.

Verify that the flash image size is in the server root directory. The path for the root server is shown on the server command window:

C:\TFTP-root

Use the File Manager to locate this directory on the server and look at the detail listing of the file. The file length displayed by the show flash command should be the same size as the size of the file stored on the TFTP server. If the file sizes are not identical in size, check with your instructor.

Task 4: Restore the Cisco IOS File to the Switch from a TFTP Server

Step 1: Verify connectivity.

Verify that the TFTP server is running, and ping the TFTP server IP address from the switch.

If the pings fail, troubleshoot the switch and server configurations.

Step 2: Identify the Cisco IOS filename on the server and the entire path name of the destination for the switch.

What is the name of the file on the TFTP server root directory that will be copied to the switch? ________

What is the destination path name for the IOS file on the switch? ________

What is the IP address of the TFTP server? _________

Step 3: Upload the Cisco IOS software from the server to the switch.

Note: It is important that this process is not interrupted.

In privileged EXEC mode, copy the file from the TFTP server to flash memory.

Is the file size of the uploaded file the same as that of the saved file on the TFTP root directory? ________

Step 4: Test the restored Cisco IOS image.

Verify that the switch image is correct. To do this, reload the switch image and observe the startup process. Confirm that there are no flash errors. If there are no errors, the Cisco IOS software on the switch should have started correctly. To further verify the Cisco IOS image in flash, issue the command that will show the Cisco IOS version.

Task 5: Back Up and Restore a Configuration File from a TFTP Server

Step 1: Copy the startup configuration file to the TFTP server.

Verify that the TFTP server is running and that it can be pinged from the switch. Save the current configuration.

Back up the saved configuration file to the TFTP server.

Step 2: Verify the transfer to the TFTP server.

Verify the transfer to the TFTP server by checking the command window on the TFTP server. The output should look similar to the following:

Received alswitch-confg from (172.17.99.11), 1452 bytes

Verify that the alswitch-confg file is in the TFTP server directory C:\TFTP-root.

Step 3: Restore the startup configuration file from the TFTP server.

To restore the startup configuration file, first erase the existing startup configuration file, and then reload the switch.

When the switch has been reloaded, you must reestablish connectivity between the switch and the TFTP server before the configuration can be restored. To do this, reconfigure VLAN 99 with the correct IP address and assign port Fast Ethernet 0/18 to that VLAN (refer to Task 1).

After VLAN 99 is up, verify connectivity by pinging the server from the switch.

If the ping is unsuccessful, troubleshoot the switch and server configuration. Restore the configuration from the TFTP server by copying the alswitch-confg file from the server to the switch.

Note: It is important that this process is not interrupted.

Was the operation successful?

Step 4: Verify the restored startup configuration file.

In privilege EXEC mode, reload the router again. When the reload is complete, the switch should show the ALSwitch prompt. Examine the running configuration to verify that the restored configuration is complete, including the access and enable secret passwords.

Task 6: Upgrade the Cisco IOS Software of the Switch

Note: This lab requires that a combination of a Cisco IOS image and the HTML archive (tar) file be placed in the default TFTP server directory by the instructor or student. This file should be downloaded by the instructor from the Cisco Connection online software center. In this lab, the c2960-lanbase-mz.122-25.FX.tar file is referenced for instructional purposes only. This has the same filename stem as the current image. However, for the purpose of the lab, assume that this file is an update. The Cisco IOS software update release includes the binary image and new HTML files to support changes to the web interface.

This lab also requires that there is a saved copy of the current configuration file as a backup.

Step 1: Determine the current boot sequence for the switch and check memory availability.

Determine if there is sufficient memory to hold multiple image files. Assume that the new files require as much space as the current files in flash memory.

Is there sufficient memory capacity to store additional Cisco IOS and HTML files? _________

Step 2: Prepare for the new image

If the switch has enough free memory as described in the last step, rename the existing Cisco IOS file to the same name with the .old extension.

Verify that the renaming was successful.

As a precaution, disable access to the switch HTML pages, and then remove the existing HTML files from flash memory.

Step 3: Extract the new Cisco IOS image and HTML files into flash memory.

Enter the following to place the new Cisco IOS image and HTML files into the flash memory target directory:

ALSwitch#archive tar /x tftp://172.17.99.21 / c2960-lanbase-mz.122-
25.FX.tar flash:/c2960-lanbase-mz.122-25.FX

Re-enable the HTTP server on the switch.

Step 4: Associate the new boot file.

Enter the boot system command with the new image filename at the configuration mode prompt, and then save the configuration.

Step 5: Restart the switch.

Restart the switch using the reload command to see if the new Cisco IOS software loaded. Use the show version command to see the Cisco IOS filename.

What was the name of the Cisco IOS file the switch booted from? ______

Was this the proper file name? ______

If the Cisco IOS filename is now correct, remove the backup file (with the .old extension) from flash memory.

Task 7: Recover Passwords on the Catalyst 2960

Step 1: Reset the console password.

Have a classmate change the console, vty, and enable secret passwords on the switch. Save the changes to the startup-config file and reload the switch.

Now, without knowing the passwords, try to gain access to privilege EXEC mode on the switch.

Step 2: Recover access to the switch.

Detailed password recovery procedures are available in the online Cisco support documentation. In this case, they can be found in the troubleshooting section of the Catalyst 2960 Switch Software Configuration Guide. Follow the procedures to restore access to the switch.

Once the steps are completed, log off by typing exit, and turn all the devices off. Then remove and store the cables and adapter.