Exam 350-401 topic 1 question 33 discussion

Page 10. AP must be part of the fabric overlay. https://www.cisco.com/c/dam/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/deploy-guide/cisco-dna-center-sd-access-wl-dg.pdf

From ENCOR official guide chapter 23 (SD-ACCESS) "While Cisco SD-Access is designed for user simplicity, abstraction, and virtual environments, everything runs on top of physical network devices—namely switches, routers, servers, wireless LAN controllers (WLCs), and wireless access points (APs)" - Why do you say APs are part of the overlay and not the underlay?

In an SD-Access deployment, the network operates on a fabric-based architecture where both wired and wireless networks are integrated into the same fabric. The APs are fabric-enabled and communicate with the fabric control plane (such as the Cisco DNA Center or Cisco vManage) to allow seamless mobility, segmentation, and policy enforcement across the entire network.

A is correct

C. The underlay network refers to the physical infrastructure that provides the basic connectivity and transport for all the data in the network. It includes devices like routers, switches, and wireless access points (APs), as well as the physical connections (such as Ethernet, fiber, or wireless links) between them.

To quote Heim_Ox " Page 10 https://www.cisco.com/c/dam/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/deploy-guide/cisco-dna-center-sd-access-wl-dg.pdf" Per the cisco documentation it states the following: Access points must be deployed as follows: • Be directly connected to the fabric edge (or to an extended node switch) • *Be part of the fabric overlay* • Belong to the INFRA_VN, which is mapped to the global routing table • Join the WLC in Local mode The second bullet point "Be part of the fabric overlay" confirms answer A.

A is correct Access points must be deployed as follows: • Be directly connected to the fabric edge (or to an extended node switch) • Be part of the fabric overlay • Belong to the INFRA_VN, which is mapped to the global routing table • Join the WLC in Local mode WLCs must be deployed as follows: • Be connected outside the fabric (optionally directly to border) • Reside in the global routing table • No need for inter-VRF leaking for an AP to join the WLC • Communicate to only one control-plane node (two for redundancy); hence one WLC can belong to only one fabric domain (FD) https://www.cisco.com/c/dam/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/deploy-guide/cisco-dna-center-sd-access-wl-dg.pdf (page 10)

C. "Fabric enabled or fabric mode APs integrate with the fabric edge nodes to build a Virtual Extensible LAN (VXLAN)-based distributed data plane for wireless clients in the fabric overlay." - only possible if AP is part of underlay

But B is as well.should be 2 options to choose ?

I think this question refers to Fabric Enabled Wireless (FEW). In this case, the AP IP addresses go in the GRT along with the P2P link IP addresses of the underlay.

AP forwards traffic which is a function of overlay. WLC is external to fabric. Client is a catch since it's end user.

A is correct Access points must be deployed as follows: • Be directly connected to the fabric edge (or to an extended node switch) • Be part of the fabric overlay • Belong to the INFRA_VN, which is mapped to the global routing table • Join the WLC in Local mode

A Access points must be deployed as follows: • Be directly connected to the fabric edge (or to an extended node switch) • Be part of the fabric overlay • Belong to the INFRA_VN, which is mapped to the global routing table • Join the WLC in Local mode https://www.cisco.com/c/dam/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/deploy-guide/cisco-dna-center-sd-access-wl-dg.pdf

The correct answer is A. SD-Access Wireless network deployment This section gives some important considerations for deploying WLC and APs in an SD-Access Wireless network. please refer to the picture below: Access points must be deployed as follows: • Be directly connected to the fabric edge (or to an extended node switch) • Be part of the fabric overlay • Belong to the INFRA_VN, which is mapped to the global routing table • Join the WLC in Local mode

Client traffic from wireless endpoints is not tunneled from the APs to the wireless controller. Instead, communication from wireless clients is encapsulated in VXLAN by the fabric APs which build a tunnel to their first-hop fabric edge node. A is the correct answer.

AP as equipment is part of the underlay

AP as equipment is part of the underlay