How Can I Identify a Combo Port on a Huawei S5720-EI Switch?

You can use the following methods to identify a combo port on a your S5720-EI switch:
1. Identify a combo port based on the interface identifier on the switch panel. If two ports
have the same ID but connects to different transmission media, the two ports are
multiplexed as a combo port.
2. Run the display interface command to display the combo port.

<HUAWEI> display interface gigabitethernet 0/0/1
...
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is
0025-9e80-2494
Port Mode: COMBO AUTO
Speed : 100, Loopback:
NONE
...

You can run the combo-port command to set the working mode of a combo port.
– COMBO AUTO: The combo port automatically selects the working mode.
– FORCE FIBER: The combo port is configured to work as an optical port.
– FORCE COPPER: The combo port is configured to work as an electrical port.