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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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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.
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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.
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TTY
The TTY is used to manage and monitor login users.
The TTY mode is the login mode by using the asynchronous serial port.
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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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
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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.
shows the absolute numbers of the user interfaces in this system.
Huawei AR2200 Series Enterprise Routers
Configuration Guide - Basic Configuration
4 Configuring User Interface
Issue 02 (2011-10-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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