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CLI-based Configuration Guide - Interface Management

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples of the interfaces supported by the device.
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Overview of Async Interfaces

Overview of Async Interfaces

The Async interface is one of the most widely used WAN interfaces. It is a dedicated asynchronous serial interface and can work in protocol or flow mode.

Asynchronous Serial Interfaces Supported by the Device

The device supports the following asynchronous serial interfaces:
  • When a synchronous/asynchronous serial interface works in asynchronous mode, the interface is called the serial interface.

  • A dedicated asynchronous serial interface is called the async interface.

Async Interfaces Working in Protocol Mode

  • In protocol mode, async interfaces on both ends establish a link based on the existing link layer protocol parameters after a physical connection is established between them.

  • The link layer protocol is PPP.

  • The network layer protocol is IP.

You can use async interfaces working in protocol mode to manage modems. For configuration details, see Modem Management Configuration in the Huawei AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 Series Enterprise Routers Configuration Guide - WAN.

Async Interfaces Working in Flow Mode

  • In flow mode, async interfaces on both ends interact with each other, the local interface sends configuration information to the remote interface to set physical layer protocol parameters for the remote interface, and then the two interfaces establish a link based on the configured parameters.

  • In flow mode, the link layer protocol and network layer protocol (IP) are not supported.

Async interfaces working in flow mode support the redirection function used to log in to other devices. For configuration details, see Configuring the Redirection Function for Device Login in the Huawei AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 Series Enterprise Routers Configuration Guide - Basic Configuration.

Updated: 2019-03-06

Document ID: EDOC1100069331

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