Dell PowerEdge FN I/O Module Command Line Reference Guide 9.10(0.0)

When a user enters CONFIGURATION mode and another user is already in CONFIGURATION mode, the Dell operating system generates an alert warning message similar to the following:

Dell#conf
                              
                              % Warning: The following users are currently configuring the system:
                              
                              User "" on line console0
                              User "admin" on line vty0 ( 123.12.1.123 )
                              User "admin" on line vty1 ( 123.12.1.123 )
                              User "Irene" on line vty3 ( 123.12.1.321 )
                              Dell#conf
                           

When another user enters CONFIGURATION mode, the Dell Networking OS sends a message similar to the following:

% Warning: User "admin" on line vty2 "172.16.1.210" is in configuration

In this case, the user is “admin” on vty2.