Technical Tip: Recommended port speed configuration for SFP module 1000-Base-SX and 1000-Base-LX

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Description	This article describes the recommended port speed configuration when using SFP module 1000-Base-SX or LX.
Scope	FortiSwitch v6.x and above.
Solution	Related articles: Technical Tip: Recommended port speed configuration when using copper SFP module 1000-Base-T Technical Tip: Recommended Port speed configuration for SR (short range) SFP cable Troubleshooting Tip: SFP/SFP+ transceivers port/fiber link is not coming up Technical Tip: Port speed configuration for DAC (Direct Attach Copper) cable Sometimes, when using the SX/LX module with other vendor units, it is recommended to use the speed settings below on the port. Reason: Sometimes, the port does not come up, or if it does, the FortiSwitch does not learn the Mac address on the port as no Rx traffic is received on it. config switch physical-port     edit port#         set speed 1000auto     end For Managed FortiSwitch, change the speed from the FortiGate: Configuring port speed and status FGT# config switch-controller managed-switch FGT(managed-switch) # edit <SWITCH-ID> FGT(SWITCH-ID) # config ports FGT(ports) # edit port# FGT(port#) # set speed 1000auto FGT(port#) # end FGT(SWITCH-ID) # end Useful Commands: diag switch mac-address list | grep port# diag switch physical-ports linerate port# <----- Ctrl+c to stop.