H3C Switch Fiber Optic Port Trunk Enabled

To enable a fiber optic port as a trunk on an H3C switch, configure the port mode as trunk, allow the desired VLANs, and activate the port using CLI commands.Step-by-Step ConfigurationAccess the Switch CLI Connect to the H3C switch via console, SSH, or Telnet. Enter system view mode:CodeCopysystem-view Identify the Fiber Port Determine the interface name for your fiber optic port (e.g., GigabitEthernet1/0/1 or Ten-GigabitEthernet1/0/1). Enter interface view:CodeCopyinterface GigabitEthernet1/0/1 Set the Port to Trunk Mode Configure the port as a trunk to carry multiple VLANs:CodeCopyport link-type trunk Allow VLANs on the Trunk Specify which VLANs are allowed to pass through the trunk port. For example, to allow VLANs 10, 20, and 30:CodeCopyport trunk permit vlan 10 20 30 Set the Native VLAN (Optional) If you want a specific VLAN to be untagged on the trunk, configure the native VLAN:CodeCopyport trunk pvid vlan 10 Enable the Port Ensure the port is active:CodeCopyundo shutdown Verify Configuration Check the trunk port status and VLAN assignment:CodeCopydisplay interface GigabitEthernet1/0/1display vlandisplay port trunk Additional NotesHybrid Ports: If you need the port to handle both tagged and untagged traffic differently, consider configuring it as a hybrid port instead of a pure trunk .Flow Control: By default, flow control is disabled. You can enable it if needed for fiber links to prevent packet loss .Logging: Frequent link up/down events can generate logs; you can disable unnecessary log output to reduce network load .Following these steps ensures that your fiber optic port on an H3C switch is properly configured as a trunk, allowing multiple VLANs to pass and maintaining network stability .