12.2SX
Using FTP to upload an IOS image to a router
The ftp client in IOS will default to using the first username and password in the startup-config. You therefore do not need to explicitly define an ftp username and password. Make sure your FTP server is configured to accept the username and password configured on your router.
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conf t
username cisco password cisco
copy ftp: sup-bootdisk:
address or name [...]

