File Transfer 101 – TFTP & FTP

TFTP
TFTP Server
You can use a Cisco Router as a TFTP Server, usually used to serve IOS images to other routers.
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R(config)# tftp-server FILE-URL [alias ALIAS] [ACL]
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! ALIAS - the server will respond to requests for the ALIAS name with the FILE-URL file
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! ACL - used to limit TFTP clients
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You can also configure the TFTP client using:
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R(config)# ip tftp source-interface INTERFACE
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TFTP Client
You can use the router as a TFTP Client using a command like:
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R# copy tftp://FILE-SRC DESTINATION-URI
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R# more tftp://FILE-SRC
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FTP
FTP Client
You can use the router as a FTP Client using a command like:
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R# copy ftp://FILE-SRC DESTINATION-URI
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R# more ftp://FILE-SRC
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In contrast with TFTP, FTP offers more advanced features. This is why we can configure the FTP client even further:
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! Specify USER and PASS:
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R(config)# ip ftp username USER
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R(config)# ip ftp password PASS
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! Specify the source interface
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R(config)# ip ftp source-interface INTERFACE
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! Connect using Passive FTP
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R(config)# ip ftp passive
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