How to configure the work mode of the Combo interface of an AR router

Combo interfaces are optical-electrical multiplex Ethernet interfaces. The optical interface and the electrical interface of the combo interface cannot work at the same time.
Note: Combo interfaces work in electrical interface mode by default. If you want to use the optical interface of the Combo interface, you must configure the Combo interface as follows to set it to optical interface mode.

1. Run the system-view command to enter the system view.
2. Run the interface gigabitethernet [interface-number] command to enter the view of the GigabitEthernet interface.
3. Run the combo-port { auto | copper | fiber } command to configure the work mode of the Combo interface.

auto: Indicates the work mode is selected automatically. The device detects the state of the interfaces and select the work mode as follows:
- If the state of the electrical interface becomes Up first, electrical interface mode is selected.
- If the state of the optical interface becomes Up first, optical interface mode is selected.
copper: Indicates that the work mode of the Combo interface is set to electrical interface mode by force, that is, data is transmitted through network cables.
fiber: Indicates that the work mode of the Combo interface is set to optical interface mode by force, that is, data is transmitted through optical fibers.

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