| Description | This article describes that, after creating a VLAN interface on a Fortinet FortiGate firewall, the delete button in the GUI can be greyed out, making it unclear how to remove the interface. |
| Scope | FortiGate |
| Solution |
Cause:
Identify the VLAN interface to be removed. Examine the 'Ref.' column adjacent to the interface. This indicates the count of configurations that reference it.
Check the 'Ref.' Column:
'Network -> Interfaces'.
Deleting the Interface:
(e.g., policies, routes, DHCP servers)
diag sys cmdb refcnt show system.interface.name <name_of_the_VLAN_interface>
To delete VLAN via the CLI:
config system interface
config firewall policy
delete <policy_id>
end
config system interface
delete <vlan_interface_name>
end
Best Practices:
Related Articles:
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