Administrator Guide
You can then send any user a message using the send command from EXEC Privilege mode. Alternatively,
you can clear any line using the clear command from EXEC Privilege mode. If you clear a console session,
the user is returned to EXEC mode.
Example of Locking CONFIGURATION Mode for Single-User Access
Dell(conf)#configuration mode exclusive auto
BATMAN(conf)#exit
3d23h35m: %RPM0-P:CP %SYS-5-CONFIG_I: Configured from console by console
Dell#config
! Locks configuration mode exclusively.
Dell(conf)#
If another user attempts to enter CONFIGURATION mode while a lock is in place, the following appears on
their terminal (message 1): % Error: User "" on line console0 is in exclusive configuration
mode
.
If any user is already in CONFIGURATION mode when while a lock is in place, the following appears on their
terminal (message 2): % Error: Can't lock configuration mode exclusively since the
following users are currently configuring the system: User "admin" on line vty1
( 10.1.1.1 ).
NOTE: The CONFIGURATION mode lock corresponds to a VTY session, not a user. Therefore, if you
configure a lock and then exit CONFIGURATION mode, and another user enters CONFIGURATION mode,
when you attempt to re-enter CONFIGURATION mode, you are denied access even though you are the
one that configured the lock.
NOTE: If your session times out and you return to EXEC mode, the CONFIGURATION mode lock is
unconfigured.
Limit Concurrent Login Sessions
Dell Networking OS enables you to limit the number of concurrent login sessions of users on VTY, Aux, and
console lines. You can also clear any of your existing sessions when you reach the maximum permitted
number of concurrent sessions.
By default, you can use all 10 VTY lines, one console line, and one Aux line. You can limit the number of
available sessions using the login concurrent-session limit command and so restrict users to that
specific number of sessions. You can optionally configure the system to provide an option to the users to
clear any of their existing sessions.
Restrictions for Limiting the Number of
Concurrent Sessions
These restrictions apply for limiting the number of concurrent sessions:
• Only the system and security administrators can limit the number of concurrent sessions and enable the
clear-line option.
Management 94