How to check if our SFP is in the normal working range?

Zyxel_Chris Posts: 669  Zyxel Employee
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If the link status of your SFP port changes frequently, it's important to ensure that your SFP (Small Form-Factor Pluggable) module is operating within the normal working range. Here are steps you can take to diagnose and address any issues:

Verify DDMI Data: Utilize Digital Diagnostics Monitoring Interface (DDMI) to confirm if the Rx and Tx power levels are within acceptable limits.
Analyze RX Power: Examine the RX power signal, which may indicate issues. For instance, if the RX power decreases to a value such as -25.69 dBm, which falls outside the normal working range, consider replacing the fiber cable initially. If there's any intermediate panel involved, ensure it's properly maintained. If the issue persists, it might be related to the transceiver at the peer site.
Locate DDMI: Access the DDMI information in the device's port detail page to obtain relevant data.
By following these steps and utilizing DDMI data, you can effectively troubleshoot and address any abnormalities in your SFP module's operation.