Hello UV,
Ruckus APs require L3 discovery today, using DHCP Option 43 or DNS, but
new and about to be announced RuckOS 3.0 will include LLDP to "help" Access
Points to find available ZDs on the network, restoring an L2 discovery method.
You would still use a "set director ip a.b.c.d" to direct your APs to a ZD on a
different subnet.