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D-View 5.1 User's Guide
The D-View network management system comes with a TFTP server function that
allows you to configure the management console as a TFTP server on the network. This
function implements the Trivial File Transfer Protocol (TFTP) to download image files
from the management console (acting as a TFTP server) to the devices. TFTP is the
second file transfer protocol under the TCP/IP suite that provides inexpensive,
unsophisticated service. It restricts operations to simple file transfers and does not
require authentication unlike the original File Transfer Protocol (FTP).
When operating as a TFTP server, all network devices that need to upgrade or rebuild
the software in their Flash memory send requests to the management console for
downloading of their respective image files. When a request is received from a device,
the server searches (using the MAC address of the device) its database for the image file
assigned to the requesting device, and then downloads the appropriate file to the
device. Software downloading is necessary when a new software version is released
from the device vendor, or when the software in the Flash memory of the device has
been corrupted. In addition to remote software downloading, you can also download
software locally via the diagnostic port of the device.
A network can have multiple TFTP servers; how they are assigned to specific devices
depend on the configuration specified in the BOOTP tables of the management
consoles. The BOOTP table allows you to assign a TFTP server for each device, and the
location of its respective image file in the server's hard disk.
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