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

[sachitdas_FTNT]

Description	This article describes the recommended port speed configuration when using SFP module 1000-Base-SX or LX.
Scope	FortiSwitch version 6.x and above.
Solution	Reference Links: https://community.fortinet.com/t5/FortiSwitch/Technical-Tip-Recommended-port-speed-configuration-whe... https://community.fortinet.com/t5/FortiSwitch/Technical-Tip-Recommended-Port-speed-configuration-for... https://community.fortinet.com/t5/FortiSwitch/Troubleshooting-Tip-SFP-SFP-transceivers-port-fiber-li... https://community.fortinet.com/t5/FortiSwitch/Technical-Tip-Port-speed-configuration-for-DAC-Direct-... Sometimes, when using SX/LX module with other vendor unis, it is recommended to use the below speed settings on the port. Reason: Sometimes the port does not come up OR If the port comes up, the FortiSwitch does not learn the mac address on the port as there is no Rx traffic received on the port. # config switch physical-port     edit port#         set speed 1000auto     end For Managed FSW, change the speed from the FGT:- https://docs.fortinet.com/document/fortiswitch/7.2.4/fortilink-guide/801177/configuring-port-speed-a... Useful Commands: # diag switch mac-address list | grep port# # diag switch physical-ports linerate port# <----- Ctrl+c to stop.