Troubleshooting Tip: Automation stitch for VLAN interface monitoring on FortiGate

Description

This article describes a known behavior on FortiGate version 7.4.x where the automation stitch for interface monitoring triggers both the down stitch and the up stitch simultaneously when an interface is disabled via the GUI. The article provides a step-by-step guide to resolve this issue.

Scope

FortiGate.

Solution

To resolve this issue, follow these steps:

1. Upgrade to FortiGate version 7.6.7, as this issue is already fixed in this version.

2. If upgrading is not possible, consider monitoring physical interfaces instead of VLAN interfaces, as this issue does not occur on physical interfaces.

3. Configure the automation stitch to trigger only on the desired event, either the down stitch or the up stitch, by editing the trigger settings in the automation stitch configuration.

For example, to configure the automation stitch to trigger only on the down stitch, run the following command:

config system automation-stitch 
 edit "Interface Down Stitch" 
  set trigger "Network Interface Down Trigger" 
  config actions 
   edit 1 
    set action "InterfaceDown_email"
   next
  end
 next
end