Thanks for your query. I assume you are referring to changing your vSZ from single-interface to 3-interface mode. Please note that this is not possible without a factory-reset as the interface-mode is chosen during the initial setup mode and it cannot be changed later on without factory defaulting. Furthermore, 3 interface mode is only possible if you select the "High-Scale" instance (vSZ-H) during the initial setup. Essentials (vSZ-E) only allows you to be on single interface. Here is a Quick Setup Guide that you can refer to - https://support.ruckuswireless.com/documents/2818-virtual-smartzone-quick-setup-guide-vsz
