copy of the configuration can be stored on a TFTP server. The copy running-config tftp command, as shown in Figure , can be used to store the current configuration on a network TFTP server. To do so, complete the following tasks: Step 1 Enter the copy running-config tftp command. Step 2 Enter the IP address of the host where the configuration file will be stored. Step 3 Enter the name to assign to the configuration file. Step 4 Confirm the choices by answering yes each time. A configuration file stored on one of the network servers can be used to configure a router. To do so, complete the following tasks:

1. Enter configuration mode by entering the copy tftp running-config command, as shown in Figure .
2. At the system prompt, select a host or network configuration file. The network configuration file contains commands that apply to all routers and terminal servers on the network. The host configuration file contains commands that apply to one router in particular. At the system prompt, enter the optional IP address of the remote host where the configuration file is located. In this example, the router is configured from the TFTP server at IP address 131.108.2.155.
3. At the system prompt, enter the name of the configuration file or accept the default name. The filename convention is UNIX-based. The default filename is hostname-config for the host file and network-config for the network configuration file. In the DOS environment, filenames are limited to eight characters plus a three-character extension (for example, router.cfg ). Confirm the configuration filename and the tftp server address that the system supplies. Notice in Figure that the router prompt changes to tokyo immediately. This is evidence that the reconfiguration happens as soon as the new file is downloaded.

The router configuration can also be saved to a disk by capturing text in the router and saving it to the disk or hard drive. If the file needs to be copied back to the router, use the standard edit features of a terminal emulator program to paste the command file into the router. Lab Activity Lab Exercise: Copying, Editing, and Pasting Configurations This lab is to capture the running configuration of a router to an ASCII text file with HyperTerminal. Web Links Operating and Maintaining Cisco Devices: Using Cisco Info Center http://www.cisco.com/en/US/netsol/
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Content Summary This section summarized the key points in configuring a router. The router has several modes:

• User EXEC mode
• Privileged EXEC mode
• Global configuration mode
• Other configuration modes

The command-line interface may be used to make changes to the configuration:

• Setting the hostname
• Setting passwords
• Configuring interfaces
• Modifying configurations
• Showing configurations

An understanding of the following key points should have been achieved:

• Configuration standards are key elements in the success of any organization maintaining an efficient network.
• Interface descriptions can include important information to help network administrators understand and troubleshoot their networks.
• Login banners and messages-of-the-day provide users with information upon login to the router.
• Host name resolutions translate names to IP addresses to allow the router to quickly convert names to addresses.
• Configuration backup and documentation is extremely important to keep a network operating smoothly.