Product and Software: This article applies to RAP2 and ArubaOS 6.0 and later.
The DNS Aruba Discovery Protocol was switched off on RAP2. APs were forced to use DHCP option 43 to boot and provision locally.
In the early days of RAP2/5, some ISPs responded to aruba-master with an advertisement site, so the RAPs never booted. As a result, DNS booting was turned off.