Check one or both Radius servers active to use a radius server to authenticate user.

hostapd.conf

ieee8021x=1
own_ipi_addr=127.0.0.1

auth_algs=3

eap_message=hello_clients
eapol_key_index_workaround=0
eap_reauth_period=3600

wpai=1
wpa_key_mgmt=WPA-EAP
wpa_pairwise=TKIPi
wpa_group_rekey=600
rsn_preauth=1

#Radius
auth_server_addr=192.168.33.25
auth_server_port=1812
auth_server_shared_secret=secret
acct_server_addr=192.168.33.26
acct_server_port=1813
acct_server_shared_secret=secret