Deployment Guide

• Set manual lock using the configure terminal lock command from CONFIGURATION mode. When you congure a manual

lock, which is the default, you must enter this command each time you want to enter CONFIGURATION mode and deny access to

others.

Viewing the Conguration Lock Status

If you attempt to enter CONFIGURATION mode when another user has locked it, you may view which user has control of

CONFIGURATION mode using the show configuration lock command from EXEC Privilege mode.

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 congure 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 congured the lock.

NOTE: If your session times out and you return to EXEC mode, the CONFIGURATION mode lock is

uncongured.

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 specic number of sessions. You can optionally congure 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 congured with the login concurrent-session clear-line

enable

command.

Management