How to check the interface duplex mode of an AR router

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Duplex modes:
- Half-duplex: An interface can either receive or send data at one time. The maximum transmission distance is also limited.
- Full duplex: An interface can receive and send data simultaneously. The maximum throughput can be twice of the interface rate. In addition, the transmission distance is not limited.

You can run the display interface ethernet brief command to check the brief information about the Ethernet interface of a router, including the physical state, auto-negotiation method, duplex mode, rate, and average bandwidth utilization rate in the receiving and sending directions in the recent period of the interface.

In the displayed information, the Duplex column indicates the duplex mode of the interface, which can be one of the following modes:
? full: Indicates that the interface works in full-duplex mode.
? half: Indicates that the interface works in half-duplex mode.
? In auto-negotiation mode, you can run the auto duplex command to configure the duplex mode of an interface.
? In non-auto negotiation mode, you can run the duplex command to configure the duplex mode of an interface.

Other related questions:
Modify attributes of interfaces on the S1728GWR-4P switch
Modify the attributes (including the auto-negotiation mode, manual setting of port rate, full duplex mode, and traffic control) of an interface on an S1728GWR-4P switch using either of the following methods: 1. Port-based configuration: a. Choose Interface > Port > General. b. Select Configure by Port Range from the Action drop-down list box. Configure parameters of interfaces within a range in a batch. c. After completing the configuration, click Apply. The configuration takes effect immediately. To check status of each interface, choose Interface > Port > General and select Show Information from the Action drop-down list box.�?2. Port list based configuration: a. Choose Interface > Port > General. b. Select Configure by Port List from the Action drop-down list box. Configure parameters of each interface. c. After completing the configuration, click Apply. The configuration takes effect immediately. To check status of each interface, choose Interface > Port > General and select Show Information from the Action drop-down list box.

How to check the configuration of the interface of an AR router
You can run the following commands to check the basic parameter configuration of an interface: - Run the display interface command to check the current running status of the interface, including the running status and basic configuration of the interface and the status of the packets forwarded by the interface. - Run the display interface brief command to check brief information about the status and configuration of the interface, including the physical state and protocol state of the interface, bandwidth utilization rate in transmitting and receiving directions in the recent period, and the number of error packets that are sent and received. - Run the display ip interface command to check the main configuration of the interface. - Run the display default-parameter interface command to check the default configuration of the interface. - Run the display interface description command to check the description of the interface. - Run the display interface counters { inbound | outbound } command to check the statistics of the packets sent or received by the physical interface.

How to check the rate of an interface of an AR router
You can run the display interface ethernet brief command on an AR router to check the brief information about the Ethernet interface of the router, including the physical state, auto-negotiation method, duplex mode, rate, and average bandwidth utilization rate in the receiving and sending directions in the recent period of the interface. In the output information displayed after the command is run, the Bandwidth column describes the bandwidth of the interface. In auto-negotiation mode, you can run the auto speed { 10 | 100 | 1000 }* command to configure the rate of the Ethernet interface. You can run the undo negotiation auto command to configure the Ethernet interface to be working in non-auto negotiation mode and run the speed { 10 | 100 | 1000 | 10000 } command to configure the rate of the Ethernet interface in the non-auto negotiation mode.

How to check the work mode of a card on an AR router
Run the display workmode command in any view to check the work mode of cards installed in all slots or specified slots.

Changing the duplex mode on the USG6000
Choose Network > Interface on the web UI and configure the duplex mode in auto-negotiation of the advanced option.

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