3Com Switch 4200G Configuration Guide

TFTP Configuration 339
3 After uploading the application, you can update the application on the switch.
Specify the downloaded file (the file named switch.bin) to be the startup file used
when the switch starts the next time and restart the switch. Thus the switch
application is upgraded.
<S4200G> boot boot-loader switch.bin
<S4200G> reboot
TFTP Configuration
Introduction to TFTP Compared with FTP, TFTP (trivial file transfer protocol) features simple interactive
access interface and authentication control. It simplifies the interaction between
servers and clients remarkably. TFTP is usually implemented based on UDP.
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, receives
data from the TFTP server, and then sends acknowledgement packets to the TFTP
server.
■ To upload a file, a client sends writing request packets to the TFTP server, sends
data to the TFTP server, and then receives acknowledgement packets from the TFTP
server.
TFTP-based file transmission can be performed in the following modes:
■ Binary mode, where executable files are transmitted.
■ ASCII mode, where text files are transmitted.
Before performing TFTP-related configurations, you need to configure IP addresses for
the TFPT client and the TFTP server, and make sure the route between the two is
reachable.
A switch can only operate as a TFTP client.
Figure 108 Network diagram for TFTP configuration
Switch
PC
Network
Network
Switch
PC
Network
Network