Use the hs-v4avail command from the hotspot context to configure the hotspot ANQP IPV4 availability.
(NA|public|restricted|singleNAT|doubleNAT|restricted-singleNAT|restricted-doubleNAT|unknown) | The mobile device uses the IP Address Type Availability information to make network selection decisions. Specify the level of restriction for the IPV4 network. |
EWC.extremenetworks.com:wlans:hs:hotspot# hs-v4avail public