Administrator Guide

Limit Concurrent Login Sessions

Dell Networking OS enables you to limit the number of concurrent login sessions of users on VTY, auxiliary, 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 auxiliary line. You can limit the number of available sessions using the

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

The following example limits the permitted number of concurrent login sessions to 4.

Dell(config)#login concurrent-session limit 4

Enabling the System to Clear Existing Sessions

To enable the system to clear existing login sessions, follow this procedure:

• Use the following command.

CONFIGURATION mode

The following example enables you to clear your existing login sessions.

Dell(config)#login concurrent-session clear-line enable

Example of Clearing Existing Sessions

When you try to log in, the following message appears with all your existing concurrent sessions, providing an option to close any one of

the existing sessions:

$ telnet 10.11.178.14

Trying 10.11.178.14...

Connected to 10.11.178.14.

Escape character is '^]'.

Password:

Current sessions for user admin:

Line Location

2 vty 0 10.14.1.97

3 vty 1 10.14.1.97

Clear existing session? [line number/Enter to cancel]:

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