Configuring Tftp; Prerequisites; Using The Device As A Tftp Client - HP 830 Series Configuration Manual

Configuring TFTP

Trivial File Transfer Protocol (TFTP) is a simplified version of FTP for file transfer over secure reliable
networks. TFTP uses UDP port 69 for data transmission. In contrast to TCP-based FTP, TFTP does not
require authentication or complex message exchanges, and is easier to deploy.
TFTP supports the following transfer modes:
Binary mode—Used to transfer image files, such as .app, .bin, and .btm files.
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ASCII mode—Used to transfer text files, such as .txt, .bat, and .cfg files.
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The device can operate only as a TFTP client (see
Figure 26 TFTP application scenario

Prerequisites

Run a TFTP server program on the file host and set a TFTP working directory.
Configure IP addresses and routes to make sure the device and the TFTP server can reach each other.

Using the device as a TFTP client

The device uses one of the following modes to update a file when you download the new file from a TFTP
server:
Normal mode—Writes data to the storage medium to overwrite the old file. If the file transfer is
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interrupted, both the old and new files are lost. This mode consumes less memory space than secure
mode.
Secure mode—Writes data to memory first, and starts writing data to the storage medium only after
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writing the entire file to memory. If the file transfer is interrupted, the old file on the FTP server is not
affected.
To avoid file loss, use the secure mode or assign the new file a file name that is unique in the storage
medium.
You can use the tftp client source command to specify a source IP address or source interface for the TFTP
packets sent by the device. If a source interface (typically, a loopback interface) is specified, its primary
IP address is used as the source IP address for the TFTP packets. The source interface and source IP
address settings overwrite each other.
The tftp client source command setting applies to all TFTP sessions. When you set up a TFTP session with
the tftp command, you can also specify a different source IP address for the TFTP session.
Figure 26) to upload or download files.
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