Cisco CCNA (200-301)Network AccessMedium
An administrator is configuring a new Wireless LAN Controller (WLC) via its web-based GUI. The WLC requires an IP address, subnet mask, and default gateway. Which of the following WLC interfaces is primarily used for these management and control plane communications?
- AManagement Interface
- BAP-Manager Interface
- CService Port (AP-only)
- DVirtual Interface
Show answer & explanationAnswer & explanation
Correct answer: A. Management Interface
The Management Interface on a WLC is the primary interface for in-band management (GUI, CLI via network), and also handles control plane communications with lightweight APs (CAPWAP control messages). It requires an IP address, subnet mask, and default gateway.
Why the other options are wrong
- B. The AP-Manager interface is used specifically for CAPWAP data plane communications with APs.
- C. The Service Port is a separate out-of-band management port, often used for initial setup or emergency access, but not the primary in-band management interface.
- D. The Virtual Interface is a dummy IP address used for Layer 3 roaming and DHCP proxy, not for direct WLC management.
WLC Interfaces
Cisco Wireless LAN Controllers utilize several logical interfaces for different functions, including management, AP communication, and client services.
- Management Interface: Primary for WLC management and AP control plane.
- AP-Manager Interface: Handles AP data plane (CAPWAP data).
- Virtual Interface: Used for client roaming, DHCP proxy, and web authentication.
- Service Port: Out-of-band management port.
Memory trick: Manage APs, Virtual Clients, Service Out.