Introduction To Tftp - 3Com 4210 PWR Configuration Manual

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Introduction to TFTP

TFTP C
Compared with FTP, TFTP (trivial file transfer protocol) features simple interactive
access interface and no authentication control. Therefore, TFTP is applicable in the
networks where client-server interactions are relatively simple. TFTP is
implemented based on UDP. It transfers data through UDP port 69. Basic TFTP
operations are described in RFC 1986.
TFTP transmission is initiated by clients, as described in the following:
To download a file, a client sends Read Request packets to the TFTP server, then
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receives data from the TFTP server, and sends acknowledgement packets to the
TFTP server.
To upload a file, a client sends Write Request packets to the TFTP server, then
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sends data to the TFTP server, and receives acknowledgement packets from the
TFTP server.
he Switch 4210 can operate as a TFTP client only.
When you download a file that is larger than the free space of the switch's flash
memory:
If the TFTP server supports file size negotiation, file size negotiation will be
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initiated between the switch and the server and the file download operation
will be aborted if the free space of the switch's flash memory is found to be
insufficient.
If the TFTP server does not support file size negotiation, the switch will receive
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data from the server until the flash memory is full. If there is more data to be
downloaded, the switch will prompt that the space is insufficient and delete
the data partially downloaded. File download fails.
TFTP-based file transmission can be performed in the following modes:
Binary mode for program file transfer.
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ASCII mode for text file transfer.
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n
Before performing TFTP-related configurations, you need to configure IP addresses
for the TFTP client and the TFTP server, and make sure a route exists between the
two.
ONFIGURATION