You will only need two screens in Ruckus Unleashed.
First, configure the preferred master via System->System Info. I have seen advice on selecting the largest or newest of your Access Points (APs). In my case, I configured R710, which supposedly is more powerful than others (R610 and R510), as the Primary Preferred Master AP.
The "Secondary Preferred Master" option is not really important, as we only give static IP to the Primary Master AP, and other APs will continue to use DHCP.
On the second step, go to System -> IP Settings and then the first tab (IP Settings) to configure static IP for the master AP. I wrote down the values for all values (Netmask, Gateway, DNS servers), then changed the setting from DHCP to Static and manually typed new value in "IP Address" field.
What exact IP to dedicate as static IP is your decision, based on what router you have and how its DHCP range is configured. I cannot provide instructions how to do it with your router, but you might be able to get some help from your ISP (Internet Service Provider). In my case, the range is 192.168.1.70 to 192.168.1.250, so I have chosen a free address just outside this range. I triple checked that this address is not assigned to any other device, otherwise it would lead to IP conflict.
