About FortiLink split interface

[KenKenKen]

Hello everyone.

I have two FortiSwitches in HA configuration, configured with an ISL ring (not MC-LAG).

I enabled the FortiLink split interface, but as shown in the figure below, both Fortilinks are enabled (link up).

I was expecting only one Fortilink to be enabled. Is this normal?

Best regards

Kenzo

[spoojary]

Split interface is for attaching 2 switches directly to FortiGate… and employs Spanning Tree. So unless your switches are interlinked, both ports will always be active.

If both interfaces are to the same switch, then split interface should be disabled, and the 802.3ad trunk will come up.

Also note that the Config won’t stay permanent on the switch — it’ll get overwritten by the Config from FortiGate if you were trying to admin-shut them via ssh to the switch…

[KenKenKen]

Thank you for your answer!

I thought that since the Forti switches are connected to each other, they would be configured as a spanning tree. However, in the topology, the spanning tree does not show a discarding status.

Is this correct behavior?

Best regards

Kenzo