H3C Technologies H3C SecPath F1000-E - Manual (Page 254)

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One user interface corresponds to one user interface view where you can configure a set of parameters,
such as whether to authenticate users at login, whether to redirect the requests to another device, and the
user level after login. When the user logs in through a user interface, the connection follows these
parameter settings, thus implementing centralized management of various sessions.
At present, the system supports the following four CLI configuration modes:
• Local configuration via the console port
• Local/Remote configuration via the AUX port (Auxiliary port)
• Local/Remote configuration through Telnet or SSH
The four modes correspond to three types of user interfaces. They are:
• Console user interface: Used to manage and monitor users that log in via the console port. Console
port is a line device port. The device provides console ports of EIA/TIA-232 DCE type.
• AUX user interface: Used to manage and monitor users that log in via the AUX port. AUX port is
also a line device port. The device provides AUX ports of EIA/TIA-232 DTE type. The port is usually
used for dialup access via modem.
• VTY (virtual type terminal) user interface: Used to manage and monitor users logging in via VTY.
VTY port is a logical terminal line used when you access the device through Telnet or SSH.
Users and User Interfaces
At a time, only one user can use the user interface. The user interface configuration applies to any user
that has logged in. For example, if user A uses the console port to log in, the configuration in user
interface view of the console port applies to user A; if user A logs in through VTY 1, the configuration in
user interface view of VTY 1 applies.
A device can support multiple console ports, AUX ports, and/or Ethernet interfaces, and thus multiple
user interfaces are supported. These user interfaces do not associate with specific users. When the user
initiates a connection request, based on the login type the system automatically assigns a type of idle
user interface with the smallest number to the user. During the login, the configuration in the user
interface view takes effect. The user interface varies depending on the login type and the login time.
Numbering User Interfaces
User interfaces can be numbered in two ways: absolute numbering and relative numbering.
Absolute numbering
Absolute numbering allows you to uniquely specify a user interface or a group of user interfaces. The
numbering system starts from number 0 with a step of 1. The numbering approach numbers the four types
of user interfaces in the sequence of console, AUX, and VTY. To view all user interfaces currently
supported and their absolute number, use the display user-interface command without any
parameters.