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The FortiSwitch is displaying the following crash log entries and is unable to detect the connected SFP modules:
4085: 1970-01-01 03:51:10 bcm-iproc-i2c 18008000.i2c: transaction timed out
4086: 1970-01-01 03:51:12 bcm-iproc-i2c 18008000.i2c: transaction timed out
...
4095: 1970-01-01 03:51:41 bcm-iproc-i2c 18008000.i2c: transaction timed out
Additionally, running the command get switch modules summary shows all SFP ports as EMPTY, indicating no modules are recognized:
Portname State Type DMI Transceiver RX Vendor Part Number Serial Number
--------- ------ ----- --- ----------- --- ------- ------------ --------------
port13 EMPTY
port14 EMPTY
...
port30 EMPTY
Resolution:
This issue is often caused by the use of unsupported third-party SFP modules. To resolve the issue:
- Ensure that only Fortinet-approved SFP modules are connected to the switch.
- Confirm the FortiSwitch is running the latest supported FortiSwitch OS firmware.
Refer to the following link for a list of supported SFP modules:
FortiSwitch - Compatible Transceivers
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