3Com Switch 7750 Configuration Guide Guide

54 CHAPTER 4: LOGGING IN THROUGH TELNET
Note that if you configure not to authenticate the users, the command level
available to users logging into a switch depends on both the
authentication-mode none command and the user privilege level level
command, as listed in
Table 24.
Configuration Example Network requirements
Perform the following configuration for Telnet users logging into VTY 0:
Set the maximum number of
lines the screen can contain
screen-length screen-length
Optional
By default, the screen can
contain up to 24 lines.
You can use the
screen-length 0 command to
disable the function to display
information in pages.
Set the history command
buffer size
history-command max-size
value
Optional
The default history command
buffer size is 10. That is, a
history command buffer can
store up to 10 commands by
default.
Set the timeout time of the
VTY user interface
idle-timeout minutes [
seconds ]
Optional
The default timeout time of a
user interface is 10 minutes.
With the timeout time being
10 minutes, the connection to
a user interface is terminated
if no operation is performed
in the user interface within 10
minutes.
You can use the idle-timeout
0 command to disable the
timeout function.
Set to display the copyright
statement information
vty copyright-info enable
Optional
By default, the copyright
information is displayed when
a user logs into a switch
through Telnet.
Tabl e 24 Determine the command level when users logging into switches are not
authenticated
Scenario
Command level
Authentication
mode
User type Command
None
(authentication-mo
de none)
VTY users
The user privilege
level level command
is not executed
Level 0
The user privilege
level level command
is already executed
Determined by the
level argument
Table 23 Telnet configuration with the authentication mode being none
Operation Command Description