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TFTP Overview 449
3 Run FTP client on the PC and establish FTP connection. Upload the switch.app to the
Switch under the Flash directory and download the
config.cfg from the Switch. FTP
client is not shipped with the Switch, so you need to buy it separately.
If the flash memory of the Switch is not enough, you need to first delete the existing
programs in the flash memory and then upload the new ones.
4 When the uploading is completed, initiate the file upgrade on the Switch.
<SW5500>
Use the boot boot-loader command to specify the downloaded program as the
application at the next login and reboot the Switch.
<SW5500> boot boot-loader switch.app
<SW5500> reboot
TFTP Overview Trivial File Transfer Protocol (TFTP) is a simple protocol for file transmission. Compared
with FTP, another file transmission protocol, TFTP has no complicated interactive
access interface or authentication control, and therefore it can be used when there is
no complicated interaction between the clients and server. TFTP is implemented on
the basis of UDP.
TFTP transmission is originated from the client end. To download a file, the client
sends a request to the TFTP server and then receives data from it and sends an
acknowledgement to it. To upload a file, the client sends a request to the TFTP server
and then transmits data to it and receives the acknowledgement from it. TFTP
transmits files in two modes: binary mode for program files and ASCII mode for text
files.
Figure 115 TFTP Configuration
Table 494 Configuration of the Switch as TFTP Client
Device Configuration Default Description
Switch Configure IP address for the
VLAN interface of the
Switch, in the same network
segment as that of TFTP
server.
- TFTP is right for the case where no
complicated interactions are required
between the client and server. Make sure
that the IP address of the VLAN interface on
the Switch is in the same network segment as
that of the TFTP server.
Use the tftp command to
log into the remote TFTP
server for file uploading and
downloading.
- -
PC Start TFTP server and set
authorized TFTP directory.
- -
Swit ch
PC
Net work
Swit chSwit ch
PC
Net work