Technical Tip: Redundant ISL error for FortiSwitch under Security Rating on FortiGate GUI

[magarwal]

Description	This article describes the reason for the 'Redundant ISL' error on the FortiGate GUI.
Scope	FortiSwitch, FortiGate.
Solution	In the FortiGate GUI, under Security Rating, a warning or error appears related to the Redundant ISL (Inter-Switch Link) for FortiSwitch. This typically indicates that there must be redundant inter-switch links between all the FortiSwitches. Once the redundant links are added to all the connected switches, the security rating will be set as passed.