Configuring an H3C Switch with an Optical to Electrical Port Adapter

On an H3C switch, a Combo port can be switched from optical to electrical by configuring the port to use the electrical interface, which automatically disables the optical interface.Understanding Combo PortsA Combo port on H3C switches consists of an optical (fiber) port and an electrical (copper) port that share a single forwarding interface. Only one of the two ports can be active at a time; enabling the electrical port automatically disables the optical port, and vice versa . Combo ports can be single or double, with double Combo ports allowing separate interface views for management, but still only one active interface at a time .Steps to Switch to Electrical PortAccess the CLI: Connect to the switch via console, Telnet, or SSH and enter system view:CodeCopysystem-view Enter the Ethernet interface view for the Combo port you want to configure:CodeCopyinterface interface-type interface-number Replace interface-type and interface-number with the actual port identifier (e.g., GigabitEthernet1/0/1).Set the port to electrical mode: Use the command to specify the medium dependent interface (MDI) mode:CodeCopymdi normal or mdi auto if you want auto-negotiation. This ensures the electrical port is active .Enable the port if it is shut down:CodeCopyundo shutdown Configure speed and duplex (optional, depending on your network requirements):CodeCopyspeed auto | 10 | 100 | 1000duplex auto | full | half Using auto allows the port to negotiate speed and duplex with the connected device .Verify the port status: Check that the electrical port is up and the optical port is inactive:CodeCopydisplay interface interface-type interface-number Notes and ConsiderationsOnly one interface is active at a time; you cannot use both optical and electrical simultaneously .Default behavior: The port with the smaller ID is usually enabled by default, which may be optical or electrical depending on the model .Flow control and MTU: You can configure flow control and maximum frame size if needed for your network environment .By following these steps, you can successfully switch a Combo port on an H3C switch from optical to electrical, ensuring proper connectivity for copper-based devices.