3Com Switch 4800G 24-Port - Page 50

50 CHAPTER 3: LOGGING IN THROUGH TELNET
Note that if you configure not to authenticate the users, the command level
available to users logging in to a switch depends on both the
authentication-mode none command and the user privilege level level
command, as listed in Table 13.
Configuration Example Network requirements
Assume that you are a level 3 AUX user and want to perform the following
configuration for Telnet users logging in to VTY 0:
■ Do not authenticate users logging in to VTY 0.
Define a shortcut key for
aborting tasks
escape-key { default |
character }
Optional
The default shortcut key
combination for aborting tasks is
< Ctrl+C >.
Make terminal services
available
shell Optional
By default, terminal services are
available in all user interfaces.
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.
Table 13 Determine the command level when users logging in to 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 not executed
Level 0
The user privilege level level
command already executed
Determined by
the level
argument
To do… Use the command… Remarks