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Hari908
New Member
February 8, 2026
Question

FortiSwitch-108F shows offline

  • February 8, 2026
  • 1 reply
  • 233 views

I am facing an issue while trying to bring Two FortiSwitch-108F switches under FortiLink managed mode with a FortiGate-40F.

The switches are discovered and authorized, but they never come Online
Environment Details

Firewall: FortiGate-40F

FortiOS: 7.4.9 (GA)

Switch Model: FortiSwitch-108F (2 units)

FortiSwitchOS: 7.4.5

Management Method: FortiLink (single FortiLink interface)

Topology:

FortiGate Port A → FSW1

FSW1 port 8 → port 8 FSW2 (ISL)

1 reply

ebilcari
Staff
Staff
February 8, 2026

You could refer to the FortiLink compatibility matrix to find the recommended firmware version and than follow the troubleshooting steps on this article: Troubleshooting Tip: Fix FortiSwitch showing with the 'Offline' status

Emirjon
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