Saturday, January 3, 2026

FortiGate 1800F and How to Check Transceiver Serial Number

Here's a Fortinet link for the FortiGate 1800F series data sheet. The FG-1800F front chassis has 1x RJ45 / USB CONSOLE port, 2x GigE RJ45 out-of-band management ports (MGMT1 and MGMT2), 2x 10 GigE fiber SFP/SFP+ HA1 and HA2 ports (2x fiber SFP included in the box), 16x GigE RJ45 ports, 8x GE fiber SFP ports, 12x 25 SFP28 / 10 GigE fiber SFP+ / GE SFP ports, 4x 100 GigE QSFP28 / 40 GigE QSFP+ ports.


The rear chassis has the serial number sticker (on the far left), redundant fans and 2x hot-swappable power supply: PSU1 on the right and PSU2 on the left.

Here's a Fortinet link for the different types of copper and optical transceivers supported in a Fortinet appliance. Third party SFP/GBIC transceivers (such as Cisco brand) would still work in a FortiGate SFP/SFP+ port. It's always best practice to use Fortinet branded SFP in a FortiGate appliance for optimum performance.

Here's a Fortinet link to check the SFP serial number and power (Tx/Rx) level in a FortiGate firewall. You'll need to issue the get system interface transceiver to view all ports or get system interface transceiver <interface> to display the info for a specific interface including its fiber optic levels (Rx/Tx power). Notice port 17 uses a Fortinet brand SFP while port 18 uses a Cisco brand SFP.


FGT# get system interface transceiver

<intface>    Interface name.

 

FGT # get system interface transceiver

Interface port17 - SFP/SFP+/SFP28, 10GBASE-SR

  Vendor Name  :            FORTINET       

  Part No.     :            FTLX8574D3BCLABC

  Serial No.   :            N88B123        

Interface port18 - SFP/SFP+/SFP28, 10GBASE-SR

  Vendor Name  :            CISCO-FINISAR  

  Part No.     :            FTLX8574D3DEF-CS

  Serial No.   :            FNS21510456    

Interface port19 -Transceiver is not detected.

Interface port20 - Transceiver is not detected.


<OUTPUT TRUNCATED>



FGT # get system interface transceiver port17

Interface port17 - SFP/SFP+/SFP28, 10GBASE-SR

  Diagnostics  :            Implemented

  Vendor Name  :            FORTINET        

  Part No.     :            FTLX8574D3BCLABC

  Serial No.   :            N88B123        

  Measurement  Unit         Value        High Alarm   High Warning Low Warning  Low Alarm

  ------------ ------------ ------------ ------------ ------------ ------------ ------------              

  Temperature  (Celsius)     31.8         78.0         73.0         -8.0        -13.0       

  Voltage      (Volts)       3.29         3.70         3.60         3.00         2.90       

  Tx Bias      (mA)          5.98        13.00        12.50         5.00         4.00       

  Rx Power     (dBm)        -26.8 --       0.0         -1.0        -18.0        -20.0       
  Tx Power     (dBm)         -2.3          0.0         -1.0         -5.0         -6.0       

  ++ : high alarm, + : high warning, - : low warning, -- : low alarm, ? : suspect.


You can also view the same info via web GUI, just go to Network > Interfaces > Transceiver(s) column > hover over a specific interface SFP serial number to view more details. Note the Cisco brand SFP was detected by the FortiGate but there's a warning: This transceiver is not certified by Fortinet.



 

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