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All-optical switch network port settings

Optical network knowledge brief Published 15 Feb 2026

Prepared for preliminary research by the COETZER OPTICAL knowledge desk. Confirm compatibility, loss budgets and installation requirements against current standards and product documentation.

To configure an all-optical switch port, you need to access the interface configuration mode, set port speed and duplex, assign VLANs, and ensure optical transceiver compatibility.Accessing the Port

Begin by connecting to the switch via CLI using SSH, Telnet, or a console cable. Enter privileged EXEC mode and then global configuration mode. From there, access the specific port using the interface command (e.g., interface GigabitEthernet1/0/1) to enter interface configuration mode .

Enabling or Disabling Ports

Ports may be enabled by default, but for security or operational reasons, you can disable a port using the shutdown command and re-enable it with no shutdown . This ensures proper traffic control and prevents unauthorized access.

Configuring Port Speed and Duplex

Set the port speed and duplex to match the connected device. Auto-negotiation is recommended to avoid mismatches, but if manual configuration is required, ensure both ends have identical settings. For optical ports, verify the supported speeds (1G, 10G, etc.) and duplex mode .

VLAN Assignment

Assign the port to a VLAN using switchport mode access for single VLANs or switchport mode trunk for multiple VLANs. Ensure the VLAN IDs match across connected devices to prevent traffic drops. For trunk ports, configure allowed VLANs and verify the native VLAN consistency .

Optical Transceiver Considerations

All-optical switches rely on SFP/SFP+ modules. Ensure the transceiver type is compatible with the port and the link speed. Avoid mixing vendors or using unsupported modules, as this can prevent the link from functioning .

Additional Configurations
  • Port Description: Use descriptive labels for easier troubleshooting (e.g., --) to maintain clarity in large networks .
  • Link Aggregation (LAG): If combining multiple ports, ensure all member ports have identical speed, duplex, VLAN, and trunk settings, and configure LACP consistently .
  • PoE Settings: For powered devices, verify per-port power limits and the switch's total PoE budget to avoid overloads .
  • Spanning Tree Protocol (STP): Configure port priorities and roles to prevent loops and ensure redundancy .
Verification

After configuration, verify the port status using commands like show interface status, show vlan brief, and show spanning-tree. Confirm that the optical link is active, the correct VLANs are assigned, and traffic flows as expected . By following these steps, you can ensure that your all-optical switch ports are properly configured for optimal performance, security, and compatibility with connected devices.

All-optical switch network port settings - COETZER OPTICAL SYSTEMS (Pty) Ltd [PDF]

All-optical switch network port settings

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This reference is intended for preliminary optical-network research. Compatibility, link budgets, installation methods, test limits and applicable standards must be verified for the specific project.

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