H3C Technologies H3C SecBlade LB Cards - Manual (Page 18)

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User interface assignment
The LB product automatically assigns user interfaces to CLI login users, depending on their login methods.
Each user interface can be assigned to only one user at a time. If no user interface is available, a CLI
login attempt will be rejected.
For a CLI login, the LB product always picks the lowest numbered user interface from the idle user
interfaces available for the type of login. For example, four VTY user interfaces (0 to 3) are configured,
of which VTY 0 and VTY 3 are idle. When a user Telnets to the LB product, the LB product assigns VTY
0 to the user and uses the settings on VTY 0 to authenticate and manage the user.
User interface identification
A user interface can be identified by an absolute number, or the interface type and a relative number.
An absolute number uniquely identifies a user interface among all user interfaces. The user interfaces are
numbered starting from 0 and incrementing by 1 and in the sequence of console, AUX, and VTY user
interfaces. You can use the display user-interface command without any parameters to view supported
user interfaces and their absolute numbers.
A relative number uniquely identifies a user interface among all user interfaces that are the same type.
The number format is user interface type + number. All user interfaces are numbered starting from 0 and
incrementing by 1. For example, the first VTY user interface is VTY 0.