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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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Example for Configuring E&M Interfaces in the Air Traffic Control Scenario

Example for Configuring E&M Interfaces in the Air Traffic Control Scenario

Networking Requirements

As shown in Figure 10-4, in the air traffic control scenario, RouterA connects to the internal call system in the ACC through an E&M interface, RouterB connects to the station through an E&M interface, and RouterA and RouterB have set up an MPLS tunnel between them using the PWE3 technology.

When a traffic control person calls a person on an airplane, the air traffic control department wants E&M signals to be transparently transmitted through the established MPLS tunnel to implement the call between the traffic control person and the person on the airplane by configuring E&M interfaces on RouterA and RouterB.

Figure 10-4  Networking diagram for configuring E&M interfaces in the air traffic control scenario

Configuration Roadmap

The configuration roadmap is as follows:

# Configure the E&M interface on RouterA so that E&M signals can be transparently transmitted to RouterB through the MPLS tunnel.

# Configure the E&M interface on RouterB so that E&M signals can be transparently transmitted to RouterA through the MPLS tunnel.

Procedure

  1. Configure the E&M interface on RouterA.

    <Huawei> system-view
    [Huawei] sysname RouterA
    [RouterA] interface serial 2/0/0
    [RouterA-Serial2/0/0] link-protocol tdm
    [RouterA-Serial2/0/0] em passthrough enable
    [RouterA-Serial2/0/0] quit

  2. Configure the E&M interface on RouterB.

    <Huawei> system-view
    [Huawei] sysname RouterB
    [RouterB] interface serial 2/0/0
    [RouterB-Serial2/0/0] link-protocol tdm
    [RouterB-Serial2/0/0] em passthrough enable
    [RouterB-Serial2/0/0] quit

  3. Verify the configuration.

    # View details about the E&M interfaces. Use the command output of RouterA as an example. You can view that the physical status and the link-layer protocol status of the E&M interface are both Up.

    [RouterA] display interface Serial 2/0/0
    Serial2/0/0 current state : UP                                                  
    Line protocol current state : UP                                                
    Last line protocol up time : 2014-02-25 16:00:49                                
    Description:HUAWEI, AR Series, Serial2/0/0 Interface                            
    Route Port,The Maximum Transmit Unit is 1500, Hold timer is 10(sec)             
    Internet protocol processing : disabled                                         
     L2VPN connection of the main PW is up                                          
     L2VPN connection of the second PW is down                                      
    Last physical up time   : 2014-03-11 16:02:13                                   
    Last physical down time : 2014-03-11 16:02:13                                   
    Current system time: 2014-03-11 17:46:16                                        
    Physical layer is , Baudrate is 0 bps                                           
    DCD=DOWN DTR=DOWN DSR=DOWN RTS=DOWN CTS=DOWN                                    
        Input bandwidth utilization  :    0%                                        
        Output bandwidth utilization :    0%  
    

Configuration Files

  • Configuration file of RouterA

    #
     sysname RouterA
    #
    interface Serial2/0/0
     link-protocol tdm
     em passthrough enable
    #
    return
  • Configuration file of RouterB

    #
     sysname RouterB
    #
    interface Serial2/0/0
     link-protocol tdm
     em passthrough enable
    #
    return
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Updated: 2019-03-06

Document ID: EDOC1100069331

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