![]() The file in the example is 68831808 bytes long. Use the show flash0: command on the router to determine the size of the Cisco IOS image file. Verify that the TFTP server has sufficient disk space to accommodate the Cisco IOS Software image. Ping the TFTP server to test connectivity, as shown in Figure 2. Ensure that there is access to the network TFTP server. ![]() To create a backup of the Cisco IOS image to a TFTP server, perform the following three steps: In Figure 1, the network administrator wants to create a backup of the current image file on the router (3.bin) to the TFTP server at 172.16.1.100. ![]() This allows the network administrator to quickly copy an image back to a router in case of a corrupted or erased image. To maintain network operations with minimum down time, it is necessary to have procedures in place for backing up Cisco IOS images.
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