HPE6-A29 Question #306: Real Exam Question with Answer & Explanation

An administrator sets up a captive portal for guest access with these specifications: VLAN 18 for the guest users will terminate on the controller and will not extend into the corporate network. APs that advertise the guest SSID will tunnel traffic to the controller, and the controller will authenticate the users. Once the users are authenticated, the user traffic will be translated to a different VLAN before it is forwarded to the corporate network to reach the Internet. When the administrator sets up this solution, the users fail to see the Captive Portal web page for authentication and cannot access the Internet. The administrator determines the problem is that the guest VLAN does not have any ports associated to it on the controller. Which CLI command should the administrator implement to resolve the issue?