3Com 400 Family, Руководство по настройке

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24 C
HAPTER
1: G
ETTING
S
TARTED
Command Line
Interface
The Switch 4500 Family provides 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 4500 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.
Command Line View The Switch 4500 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
ping
and
tracert
), commands for the different language environments of the
user interface (
language-mode
) and the
telnet
command etc. The saving of
the configuration file is not allowed at this command level.
■
Monitoring level: Commands in this level include the
display
command and
the
debugging
command, and are used for system maintenance, service fault
diagnosis, etc. 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.