User Interface Overview - Huawei AR2200 Series Configuration Manual

Huawei AR2200 Series Enterprise Routers
Configuration Guide - Basic Configuration

4.1 User Interface Overview

The system supports console, and VTY user interfaces.
Each user interface has a corresponding user interface view. A user interface view is a command
line view provided by the system. It is used to configure and manage all the physical and logical
interfaces in asynchronous mode.
User Interfaces Supported by the System
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Numbering of a User Interface
After a user logs in to the router, the system assigns an idle user interface of the smallest number
to the user according to the user's login mode. You can number a user interface in the following
manners:
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Issue 02 (2011-10-15)
Console port (CON)
The console port is a serial port provided by the main control board of the router.
The main control board provides one EIA/TIA-232 DCE console port for local
configuration by directly connecting a terminal to a router.
Virtual type terminal (VTY)
It is a logical terminal line. A VTY connection is set up when a router connects to a terminal
by means of Telnet. It is used for local or remote access to a router. A maximum of 16 users
can log in to the router by using the VTY user interface.
TTY
The TTY is used to manage and monitor login users.
The TTY mode is the login mode by using the asynchronous serial port.
Relative numbering
The relative numbering is in the format of user interface type + number.
The relative numbering is available for interfaces of a specific type. It is used only to specify
one or a group of user interfaces of a specified type. Relative numbering must comply with
the following rules:
– Number of the console port: CON 0
– Number of the TTY: TTY 0 for the first line, TTY 1 for the second line, and so on
– Number of the VTY: VTY 0 for the first line, VTY 1 for the second line, and so on
Absolute numbering
The absolute numbering is used to uniquely specify a user interface or a group of user
interfaces.
The number starts with 0. The ports are numbered in the sequence of CON → TTY →
VTY. There is only one console port and 0-20 VTY interfaces (VTY interfaces 0 to 14 are
provided for Telnet/SSH users and VTY interfaces 16 to 20 are provided for network
management users). You can use the user-interface maximum-vty command to set the
maximum number of user interfaces. The default number is five.
By default, the system supports three types of user interfaces: CON, TTY, and VTY.
Table 4-1 shows the absolute numbers of the user interfaces in this system.
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4 Configuring User Interface
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