Which two actions, when applied in the LAN network segment, will facilitate Layer 3 CAPWAP discovery for lightweight AP? (Choose two.)

Which two actions, when applied in the LAN network segment, will facilitate Layer 3 CAPWAP discovery for lightweight AP? (Choose two.)
A . Utilize DHCP option 17.
B . Configure WLC IP address on LAN switch.
C . Utilize DHCP option 43.
D . Configure an ip helper-address on the router interface
E . Enable port security on the switch port

View Answer

Answer: C, E

Explanation:

In a Cisco Unified Wireless network, the LAPs must first discover and join a WLC before they can service wireless clients.

However, this presents a question: how did the LAPs find the management IP address of the controller when it is on different subnet?

If you do not tell the LAP where the controller is via DHCP option 43, DNS resolution of “Cisco-capwap-controller.local_domain”, or statically configure it, the LAP does not know where in the network to find the management interface of the controller.

Reference: https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/119286-lap-notjoin-wlc-tshoot.html