|  | 6.1 | Router Configuration Files
| 6.1.4 | Using the copy running-config tftp and copy tftp running-config commands
You can store a current copy of the configuration on a TFTP server. You use the copy running-config tftp command, as shown in Figure , to store the current configuration in RAM, 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 that you want to use to store the configuration file. Step 3 -- Enter the name you want to assign to the configuration file. Step 4 -- Confirm your choices by answering yes each time. You can configure the router by loading the configuration file stored on one of your network servers. To do so, complete the following tasks: Enter configuration mode by entering the copy tftp running-config command, as shown in Figure . 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 from which you are retrieving the configuration file. In this example, the router is configured from the TFTP server at IP address 131.108.2.155. 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, the server filenames are limited to eight characters plus a three-character extension (for example, router.cfg). Confirm the configuration filename and the server address that the system supplies. Notice in the figure that the router prompt changes to tokyo immediately. This is evidence that the reconfiguration happens as soon as the new file is downloaded.
| Lab Activity
| In this lab we will use a TFTP (Trivial File Transfer Protocol) server to save a copy of the router's configuration file.