User Interface Overview; Users And User Interfaces; Numbering User Interfaces - HP A5830 Series Configuration Manual

User interface overview

A user interface, also called line, enables you to manage and monitor sessions between the terminal and
the device when logging in to the device through the console port, Telnet or SSH.
A single user interface corresponds to a single user interface view where you can configure a set of
parameters, such as whether to authenticate users at login, and the user privilege level after login.
When the user logs in through a user interface, the connection follows these parameter settings,
implementing centralized management of various sessions.
The system supports the following CLI configuration methods:
Local configuration through the console port
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Local or remote configuration through Telnet or SSH
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The CLI configuration methods correspond to the following types of user interfaces:
AUX user interface—Manages and monitors users logging in via the console port type EIA/TIA-232
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DCE.
VTY user interface—Manages and monitor users logging in via VTY, a logical terminal line used for
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Telnet or SSH access.

Users and user interfaces

Only one user can use a user interface at a time. The configuration made in a user interface view applies
to any user logged in to that user interface. For example:
If user A uses the console port to log in, the configuration in the AUX port user interface view applies
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to user A.
If user A logs in through VTY 1, the configuration in the VTY 1 user interface view applies to user A.
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A device can support one AUX user interface and 16 VTY user interfaces. These user interfaces are not
associated with specific users.
When a user initiates a connection request, the system automatically assigns the idle user interface
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with the smallest number to the user based on the login method.
During login, the configuration in the user interface view takes effect.
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The user interface varies depending on the login method and login time.
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Numbering user interfaces

User interfaces are numbered by using either absolute numbering or relative numbering.
Absolute numbering
Absolute numbering identifies a user interface or a group of different types of user interfaces.
The specified user interfaces are numbered from number 0 with a step of 1 and in the sequence of
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AUX and VTY user interfaces.
Use the display user-interface command without any parameters to view supported user interfaces
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and their absolute numbers.
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