H3C Technologies H3C SecPath F1000-E - Manual (Page 20)

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CLI user interfaces
The device uses user interfaces (also called "lines") to control CLI logins and monitor CLI sessions. You
can configure access control settings, including authentication, user privilege, and login redirect on user
interfaces. After users are logged in, their actions must be compliant with the settings on the user
interfaces assigned to them.
Users are assigned different user interfaces, depending on their login methods, as shown in
Table 1 .
Table 1 CLI login method and user interface matrix
User interface Login method
Console user interface Console port (EIA/TIA-232 DCE)
Virtual type terminal (VTY) user interface Telnet or SSH
User interface assignment
The device 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 device 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 device, the device assigns VTY 0 to the user and
uses the settings on VTY 0 to authenticate and manage the user.
User interface numbering
User interfaces can be numbered by using absolute numbering or relative numbering.
Absolute numbering
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 and VTY user interfaces.
You can use the display user-interface command without any parameters to view supported user
interfaces and their absolute numbers.
Relative numbering
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:
• Console user interface—CON0.
• VTY user interfaces—Numbered starting from 0 and incrementing by 1.