200-301 · Question #1339
When more than one AP-Manager interface is provisioned on a wireless LAN controller, how is the request handled by the AP?
The correct answer is C. The AP-Manager with the fewest number of APs is used by the AP to join.. When multiple AP-Manager interfaces are configured on a WLC, an AP dynamically chooses the AP-Manager interface that currently manages the fewest access points to balance the load.
Question
Options
- AThe discovery response from the AP to the AP-Manager interface disables the WLAN port.
- BThe AP join request fails and must be configured statically on the AP-Manager interface.
- CThe AP-Manager with the fewest number of APs is used by the AP to join.
- DThe first AP-Manager interface to respond is chosen by the AP.
How the community answered
(31 responses)- A3% (1)
- B3% (1)
- C84% (26)
- D10% (3)
Why each option
When multiple AP-Manager interfaces are configured on a WLC, an AP dynamically chooses the AP-Manager interface that currently manages the fewest access points to balance the load.
The discovery response from an AP does not disable any WLAN port on the WLC.
AP join requests do not automatically fail, and static configuration on the AP-Manager interface is not typically required in this scenario for basic load balancing.
When an AP discovers multiple AP-Manager interfaces on a Wireless LAN Controller (WLC), it uses a load-balancing mechanism to select which interface to join. Specifically, the AP will select the AP-Manager interface that has the least number of APs currently associated with it, ensuring even distribution of APs across the available interfaces and preventing overload on any single interface.
The AP does not simply choose the first AP-Manager interface to respond; it considers the load on each interface.
Concept tested: WLC AP-Manager interface load balancing
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-5/config-guide/b_cg85/management_interfaces.html
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