Framed-IP-Address (radius atribute) only work with mac auth.
http://www.chillispot.info/FAQ.html#mozTocId659535
How do I enable static IP?
With both WPA and MAC authentication you can include the Radius attribute Framed-IP-Address in the Access-Accept message sent back to ChilliSpot by the Radius server. For this to work
you also need to specify the statip option in /etc/chilli.conf.
bitx0.