Can Ethernet interfaces be configured to work in half duplex mode

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The following interfaces can work in half-duplex mode at the rate of 10 Mbit/s or 100 Mbit/s: FE electrical interfaces, GE electrical interfaces, and GE optical interfaces with GE copper modules installed

Other related questions:
How can packet loss be avoided when two interfaces at both ends of a link work in auto-negotiation mode and use the half-duplex mode
You can configure the local and remote devices to work in non-auto-negotiation mode, and set their duplex mode to full-duplex to avoid packet loss. The configuration is as follows: system-view [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] undo negotiation auto [HUAWEI-GigabitEthernet0/0/1] duplex full

Can two electrical interfaces communicate normally when one interface is forcibly configured to work in full duplex mode and the other work in auto-negotiation mode
According to IEEE 802.3, when electrical interface A in auto-negotiation mode connects to electrical interface B that is forcibly configured to work in full duplex mode, the two interfaces can go Up. However, interface A starts to work in half-duplex mode, and interface B still works in full duplex mode. In this case, the interface working in half-duplex mode encounters error packets and packet loss due to collision of the physical link. Therefore, it is strongly recommended that you configure the interconnected electrical interfaces to work in the same mode. That is, enable auto-negotiation mode on both interfaces or configure the interfaces to work at the same speed and duplex mode by using the following commands: system-view [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] undo negotiation auto [HUAWEI-GigabitEthernet0/0/1] speed 100 [HUAWEI-GigabitEthernet0/0/1] duplex full

How to check the interface duplex mode of an AR router
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.

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.

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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