3com 5500-SI Manual Do Utilizador

The Switch 5500 family provide a series of configuration commands and command 
line interfaces for configuring and managing the Switch. The command line interface 
has the following characteristics:

■

Local configuration through the console port.

■

Local or remote configuration through Telnet or SSH.

■

Remote configuration through a dial-up Modem to log in to the Switch.

■

Hierarchy command protection to avoid the unauthorized users accessing the 
Switch.

■

Access to online Help by entering 

.

■

Network test commands, such as Tracert and Ping, to troubleshoot the network.

■

Detailed debugging information to help with network troubleshooting.

■

Ability to log in and manage other Switch 5500 units directly, using the Telnet 
command.

■

FTP service for users to upload and download files.

■

Ability to view previously executed commands.

■

The command line interpreter that searches for a target not fully matching the 
keywords. You can enter the whole keyword or part of it, as long as it is unique 
and unambiguous.

The Switch 5500 Family provides hierarchy protection for command lines to avoid 
unauthorized users accessing it illegally.

Commands are classified into four levels, namely visit level, monitoring level, system 
level and management level:

■

Visit level: Commands in this level include network diagnosis tools (such as 

 

and 

), commands for the different language environments of the user 

interface (

) and the 

 command. The saving of the 

configuration file is not allowed at this command level.

■

Monitoring level: Commands in this level include the 

 command and the 

 command, and are used for system maintenance, service fault and 

diagnosis. The saving of the configuration file is not allowed at this command 
level.

■

System level: Commands in this level include service configuration commands, 
including routing commands and commands for each network layer, and are used 
to provide direct network service to the user.

■

Management level: Commands in this level include those that influence basic 
operation of the system and system support module, which plays a support role 
for services. Commands in this level include file system commands, FTP 
commands, TFTP commands, XModem downloading commands, user 
management commands, and level setting commands.

Login users are also classified into four levels that correspond to the four command 
levels respectively. After users of different levels log in, they can only use commands 
at the levels that are equal to or lower than their own level.

To prevent unauthorized users from illegal intrusion, the user will be identified when 
switching from a lower level to a higher level with the 

 [ 

 ] command. User 

ID authentication is performed when users at lower level become users at a higher 
level. In other words, the user password for the higher level is needed. (Suppose the