Chapter 2 Tftp Configuration; Introduction To Tftp - H3C S3100-52P Operation Manual

Operation Manual – FTP-SFTP-TFTP
H3C S3100-52P Ethernet Switch

Chapter 2 TFTP Configuration

When configuring TFTP, go to these sections for information you are interested in:

Introduction to TFTP

TFTP Configuration
2.1 Introduction to TFTP
Compared with FTP, Trivial File Transfer Protocol (TFTP) 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
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
sends data to the TFTP server, and receives acknowledgement packets from the
TFTP server.
An H3C S3100-52P Ethernet switch can act as a TFTP client only.
When an S3100-52P Ethernet switch serving as a TFTP client downloads files from the
TFTP server, the seven-segment digital LED on the front panel of the switch rotates
clockwise, and it stops rotating when the file downloading is finished, as shown in
Figure 1-1.
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
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
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.
ASCII mode for text file transfer.
2-1
Chapter 2 TFTP Configuration