Is it normal for the fiber optic tray to not have a green color

A fiber optic tray or port may not show a green light due to configuration mismatches, connectivity issues, or hardware problems.Common Causes1. Port Configuration or Speed Mismatch If the fiber port and the connected switch or device have mismatched speeds or duplex settings, the LED may remain amber instead of green. For example, a 10G fiber port connected to a switch configured differently can prevent the link from establishing properly . Ensure both ends of the fiber link are configured for compatible speeds and modes. 2. SFP or Transceiver Issues The transceiver module may be improperly seated, damaged, or incompatible with the port. Check that the SFP is fully inserted and compatible with the device. Inspect for bent pins or physical damage, and replace the transceiver if necessary . 3. Fiber Cable Problems Damaged, dirty, or improperly connected fiber cables can prevent the link from establishing. Clean the connectors with appropriate fiber cleaning tools and verify that the cable is seated correctly at both ends . Also, ensure the correct type of fiber (single-mode or multimode) is used according to the port specifications. 4. LED Indicator Behavior Different devices use different LED color schemes. Some fiber ports use green to indicate a fully active link, while amber may indicate a link is up but not fully operational, or that the port is administratively enabled but not passing traffic . Check the device documentation to confirm what each LED color represents. 5. Software or Firmware Settings Certain devices require configuration changes in the management interface to activate the port fully. For example, on Cisco FPR or ASA devices, the port may need specific interface settings applied in the software to turn the LED green . Ensure the firmware is up to date and the interface is properly configured.Troubleshooting StepsVerify the port and switch configurations match in speed, duplex, and VLAN settings.Inspect and reseat the SFP or transceiver module.Clean fiber connectors and check for physical damage.Confirm the fiber type matches the port requirements (single-mode vs multimode).Check device documentation for LED color meanings and ensure any required software settings are applied.If the issue persists, test with a known working fiber cable and transceiver to isolate the problem. By systematically checking these factors, you can identify why the fiber optic tray or port is not showing green and restore proper connectivity.