FortiSwitch
FortiSwitch: secure, simple and scalable Ethernet solutions
mrudhramurthi
Article Id 294736
Description This article describes that 10G-SR SFP modules will not come up when using single-mode fiber. 
Scope FortiSwitches.
Solution 10G-SR SFP modules connected to FortiSwitches support, only multimode fibers for the links to come up and forward traffic is expected. The 10G SFP+SR modules include:
  • FTLX8571D3BCL
  • FTLX8571D3BCV
  • FTLX8574D3BCL
  • FTLX8574D3BCLFTN

Troubleshooting commands:

 

get switch modules summary port#

get switch modules limits port#

get switch module status port#

 

If the port is still not coming up after using multi-mode fibers, contact the Fortinet TAC.

 

Related document:

https://fortinetweb.s3.amazonaws.com/docs.fortinet.com/v2/attachments/e867c8f4-202f-11e9-b6f6-f8bc12...