5-19
If a file with the same name already exists on the access controller, the system will ask you whether to
replace the existing file. Enter
Y
to replace it, or
N
to abort.
z
When you back up a file to the server and if a file with the same name already exists on the server,
the existing file will be overwritten without a prompt.
z
The above-mentioned operations are performed in user view.
z
The backup configuration file can be modified by using a text editor. To update the system
configuration of the access controller, you can modify the backup configuration file on the file
server, and then download the modified configuration file to the access controller. Your update
takes effect on the access controller after it is restarted. Likewise, you can download a new
application file to the access controller to overwrite the existing main application file to update the
application.
Maintaining the Access Controller Through FTP
The access controller as the FTP server
The File Transfer Protocol (FTP) is an application layer protocol in the TCP/IP suite. It is mainly used for
file transfer between remote hosts. FTP provides a reliable, connection-oriented data transfer service
over TCP.
The access controller can serve as the FTP server. In this case, you can use your PC as an FTP client
to log in to the access controller for file operations.
Before using FTP, you need to install the FTP client application on your PC. The FTP client software is
not provided with the access controller. You must prepare it yourself. In the following example, the FTP
client program is the one that comes with Microsoft Windows XP.
Follow these steps to maintain the software of your access controller through FTP with the access
controller as the FTP server:
1) Set up a network environment as follows:
Figure 5-9
Set up a software maintenance environment (the access controller as the FTP server)
Configure the IP addresses for both sides, which must be on the same subnet. For example, set the IP
address of the FTP client (PC) to 192.168.0.1, while that of the access controller’s Ethernet interface to
192.168.0.2. Then use the
ping
command to verify the network connectivity.
2) Enable the FTP service.
