Which WLC interface IP is used as the CAPWAP tunnel source for APs?
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Correct answer: AP-manager.
Why this is the answer
The AP-manager interface IP address is specifically used as the source IP for the Control and Provisioning of Wireless Access Points (CAPWAP) tunnels between the Wireless LAN Controller (WLC) and the access points (APs). This interface handles all CAPWAP control and data traffic. The service port is for out-of-band management and troubleshooting, not CAPWAP tunnels. A trunk port is a switch port configuration, not a WLC interface type. The virtual interface is a logical interface used for client management and mobility, not for AP tunnel sourcing.
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