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magarwal Staff rank Staff
Created on Mar 12, 2025 1:15:18 PM
Technical Tip: Redundant ISL error for FortiSwitch under Security Rating on FortiGate GUI
DescriptionThis article describes the reason for the 'Redundant ISL' error on the FortiGate GUI.ScopeFortiSwitch, FortiGate.Solution In the FortiGate GUI, under Security Rating, a warning or error appears related to the ...
FortiGate FortiSwitch ISL
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sachitdas_FTNT Staff rank Staff
Created on Oct 8, 2024 2:53:15 PM
Technical Tip: Spanning tree in LAG and MCLAG
DescriptionThis article describes spanning tree protocol (STP) behavior in LAG and MCLAG.ScopeFortiSwitch.Solution LAGs and MCLAGs are often preferred for redundancy and higher performance.   From the STP perspective LAG...
icl ISL lag mclag mclag-icl spanning tree stp trunk
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sachitdas_FTNT Staff rank Staff
Created on Sep 25, 2024 10:42:25 AM
Troubleshooting Tip: Fortilink inter-switch link(ISL) trunk not forming automatically on FortiSwitches
DescriptionThis article describes how to verify when the ISL FortiLink trunk is not configured automatically on the FortiSwitches.ScopeFortiSwitch(FSW) is managed by FortiGate version v7.x and above.Solution When two For...
FortiLink FortiSwitch ISL Managed FortiSW trunk
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sachitdas_FTNT Staff rank Staff
Created on Sep 17, 2024 2:20:50 PM
Edited on Sep 25, 2024 10:31:57 AM
Technical Tip: FortiLinkd process on FortiSwitch
DescriptionThis article describes how the FortiLinkd process works on FortiSwitch and forms the automatic FortiLink inter-switch link trunks.ScopeFortiSwitches 7.2.x and above are Managed by FortiGate.Solution By default...
FortiLink fortilinkd FortiSwitch inter switch link ISL Managed FortiSW trunk
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sachitdas_FTNT Staff rank Staff
Created on Sep 10, 2024 12:18:00 PM
Technical Tip: Managed FortiSwitch default configuration of inter switch link fortilink trunk, mclag-icl fortilink trunk and FortiGate Fortilink trunk
Description This article describes the default interface configuration of the inter-switch link trunk, mclag-icl fortilink trunk and the FortiGate Fortilink trunk that the FortiSwitch forms automatically in a Managed For...
FortiGate FortiLink FortiSwitch FSW icl Interface ISL Managed FortiSW Managed FortiSwitches mclag mclag-icl trunk
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yabhishek Staff rank Staff
Created on Aug 30, 2024 12:29:28 PM
Edited on Feb 13, 2025 10:04:37 AM
Troubleshooting Tip: ISL timing-out message 'FortiLink: ISL timing-out for trunk(8EPTXXXX716-0)' on ISL trunk
DescriptionThis article describes how to resolve the issue where the user receives 'FortiLink: ISL timing-out for trunk(8EPTXXXX716-0)' on FortiSwitch.ScopeFortiSwitch.Solution From a CLI session in the FortiSwitch, ent...
FortiGate FortiLink FortiSwitch ISL ISL timing-out static-isl timeout trunk
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sachitdas_FTNT Staff rank Staff
Created on Sep 22, 2022 9:14:14 PM
Edited on Sep 22, 2022 9:15:04 PM
Technical Tip: Seperate Inter Switch Link (ISL) between Managed FortiSwitches for data traffic
DescriptionThis article describes steps to configure separate ISL between 2 Managed FortiSwitch for data traffic.ScopeFortiGate and FortiSwitch 6.4.x and above.Solution Sometimes, the requirement is to segregate data tra...
data FortiGate FortiLink FortiSwitch ISL stp trunk VLAN
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sachitdas_FTNT Staff rank Staff
Created on Jun 15, 2022 12:46:01 PM
Edited on Jun 15, 2022 3:28:41 PM
Technical Tip: Managed FortiSwitch Fortilink port config cannot be modified from the FortiGate
Description This article describes how to manage FortiSwitch Fortilink port config cannot be modified from FortiGate.   From FortiGate, when changing the FortiSwitch Fortilink port status, the config does not gets applie...
config FortiGate FortiLink FortiSwitch ISL port trunk
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