Hi
For public html based authentication (portal redirection), you need to ensure following: (assuming DHCP server is an external DHCP server on the network side)
- make sure the VSC profile is not the default VSC profile on the controller configuration
- guest vlan created, mapped to any of the controller port (internet or lan)
- make sure it has ip address assigned (add ip address on the network section - add interface)
- make sure DNS IP address has been added to Network --> DNS page of the controller. This is very important, without an active IP address added, portal redirection will NOT work.
- make sure the DHCP server has proper scope defined with default gateway and DNS server ip options
- once you have configured ip address for the newly created vlan on the controller, go to the VSC profile - at the bottom screen you should see egress setting mappings along with DHCP forward to egress interface settings. Refer to attached screen snap for reference for similar VSC settings which uses option for external DHCP server.