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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.
• Users can clear their existing sessions only if the system is configured with the login concurrent-
session clear-line enable command.
Configuring Concurrent Session Limit
To configure concurrent session limit, follow this procedure:
• Limit the number of concurrent sessions for all users.
CONFIGURATION mode
login concurrent-session limit number-of-sessions
Management
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