What sequence does an AP follow to discover its Master Controller?

The sequence that an Access Point (AP) follows to discover its Master Controller is significant in the context of how APs connect and communicate within a network. The correct sequence begins with DHCP option 43. This option is used by the AP to identify the IP address of the controller from the DHCP server when it is obtaining an IP address.

Following this, the AP utilizes an ADP (Aruba Discovery Protocol) Multicast to discover any controllers that may be available within the network. ADP Multicast is essential because it allows the AP to send discovery messages to all controllers in the same broadcast domain, facilitating the detection of available controllers.

The next step in the sequence is ADP Broadcast, which is a more localized approach to discovering controllers. If the AP has not successfully found a controller by the ADP Multicast method, it will then resort to sending out a broadcast message, which ensures that even if the controllers are configured to respond differently, they can still be discovered.

Finally, if the previous methods fail, the AP will perform a DNS query to resolve the controller's name into an IP address. This method relies on DNS service availability and is not as direct or immediate as the other options.

Thus, the chosen path—starting with DHCP