Networking 201

Copyright Priscilla Oppenheimer

Lab 5 Backing Up Your Cisco Router

Scenario

In this lab, you will install software on the Windows machines to turn them into Trivial File Transfer Protocol (TFTP) servers. You will then back up your router's running configuration and Cisco Internetwork Operating System (IOS) to the TFTP server. (If you prefer, you can turn a Unix system into a TFTP server, but these instructions are for Windows.) To learn more about the TFTP protocol, you will capture a file transfer with Ethereal and submit Ethereal output. (The students who are writing about TFTP for their term paper, can use the data that they gather from this lab in their papers.)

Install and Start TFTP Server Software

1. Make a folder on a Windows machine for holding your TFTP server software.
2. Copy the four TFTP files that your instructor gives you to your folder.
3. Double click on TFTPSRV.EXE.
4. In theory it should be that simple to install and start your TFTP server.

Capture Data with Ethereal

1. Start Ethereal capturing packets.
2. If you're on a hub, to make sure you don't capture other people's transfers, you might want to use a capture filter
3. The syntax for a capture filter is ether host, followed by the MAC address of your computer.

Backup Your Router

1. To backup the running configuration of your router, use the copy running-config tftp command.
2. Verify that the transfer worked correctly by checking that the file arrived intact on the server.
3. To backup the Cisco IOS, first find out the name of the IOS image file in Flash, by typing show flash. The filename may be something beautiful like c1700-k9o3sy7-mz.122-15.t2.bin. The file should be about 8 MB.
4. Use the copy flash tftp command to backup the image file to your TFTP server.
5. Verify that the transfer worked correctly by checking that the file arrived on the server.

Submission