Which design principle should be followed in a Cisco SD-Access wireless network deployment?

Question

Options

• AThe WLC is connected outside of the fabric
• BThe WLC is part of the fabric underlay
• CThe access point is connected outside of the fabric.
• DThe WLC is part of the fabric overlay.

• A
  96% (44)
• B
  2% (1)
• C
  2% (1)

Explanation

Cisco SD-Access Wireless Network Design

In SD-Access wireless deployments, the Wireless LAN Controller (WLC) is intentionally positioned outside the fabric as an external entity, connecting to the fabric's border node. This design allows the WLC to manage Access Points (APs) that are connected inside the fabric as fabric endpoints, while keeping the WLC's control-plane functions separate from the SD-Access fabric architecture.

Why the distractors are wrong:

• Option B is incorrect because the WLC is not part of the underlay (the physical/routing infrastructure); it operates at a higher level outside the fabric entirely
• Option C is incorrect because the Access Points themselves are connected inside the fabric as fabric edge nodes - it's the WLC, not the APs, that sits outside
• Option D is incorrect because the WLC does not participate in the fabric overlay (the VXLAN/LISP control plane); it manages wireless independently via CAPWAP tunnels from the APs

Memory Tip: Think "WLC = Outside, APs = Inside" - the WLC acts like a manager working from outside the building, while the APs are the workers on the floor inside. This is the opposite of what many students initially assume, so it's a common exam trap!

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