This article describes the steps to troubleshoot and resolve issues related to non-functional transceivers on Fortinet switches.
Scope
FortiSwitch, FortiGate
Solution
Problem Overview: A transceiver on a Fortinet switch was reported as not working. The user confirmed that the device had previously been functional, but was suddenly exhibiting issues.
Solution steps:
Identify the initial problem: The SFP (Small Form-factor Pluggable) on the rugged switch was found to be in a 'down' state.
Examine the transceiver for errors: Errors were detected at the SFP's RX (receive) point, suggesting potential issues with the module itself or the connection.
Replace the SFP modules: By swapping out the problematic SFP modules, the errors were no longer present.
Verify SFP speed settings: A mismatch in speed settings at both ends of the SFP connection was identified. Such discrepancies can hinder proper communication and connectivity.
Adjust the speed settings: The speed was set to '1000auto' to synchronize the speed settings on both ends of the SFP connection. After this adjustment, the port status changed to 'up'.
Solution confirmation: The client verified that the transceiver was operating correctly after taking these steps.
Transceiver issues on Fortinet switches can arise for various reasons, including errors with the SFP module or mismatched speed settings. Correcting these settings or replacing malfunctioning modules can efficiently resolve such problems.
