Although you can manage VLANs from Common Objects, it is a best practice that you configure them inside a network policy workflow. See Configure VLAN Settings, and VLAN Group Object Settings.
Use this task to configure a VLAN Group object.
Configure VLANs as ranges, or individually. Indicate a range with a hyphen. Separate VLAN entries with commas, for example, 1-30, 100-200, 500.
Although optional, descriptions can be helpful when you are troubleshooting your network.