Troubleshooting Tip: VLAN Interface Used in IPsec, SSL VPN, or SD-WAN Configuration is not displayed in GUI after a firmware upgrade to FortiOS v7.4.4 or v7.6.0

[ssanga]

Description	This article describes a known issue where FortiGate fails to display a VLAN interface used in IPsec, SSL VPN, or SD-WAN. It is not displayed on the interface list or the SD-WAN page and cannot be configured in the GUI after a firmware upgrade.
Scope	FortiGate v7.4.4, v7.6.0
Solution	After upgrading FortiGate to FortiOS v7.4.4 or v7.6.0, the VLAN interface is not visible under Interfaces, SD-WAN Zones, or Firewall Policies in the GUI. Sample CLI config: config system interface     edit "Internet_Inter"         set vdom "root"         set ip 192.168.1.1 255.255.255.248         set interface "port17"         set vlanid 135     next config system sdwan     config members         edit 2             set interface "Internet_Inter"             set gateway 192.168.1.6         next     end config firewall policy     edit 0         set srcintf "Internet_Inter"         set dstintf "v10"         set srcaddr "all"         set dstaddr "all"         set schedule "always"         set service "ALL"         set logtraffic disable     next GUI: The VLAN interface 'Internet_Inter' configured on port17 is not displayed under the following: Interfaces: SD-WAN-Zone: Firewall Policy:   This issue has been resolved in v7.4.8 (scheduled to be released in April; 2025). These timelines for firmware release are estimates and may be subject to change. Workaround: Use the CLI to configure or validate the configuration. Logs required by FortiGate TAC for investigation. TAC Report:  execute tac report The configuration file of FortiGate. Fortinet Support Tool Data. Debugs: diagnose debug application httpsd -1 diagnose debug enable Load the FortiGate GUI/web pages and reproduce the issue: diagnose debug disable