What is one fact about Cisco SD-Access wireless network deployments?
What is one fact about Cisco SD-Access wireless network deployments?
In Cisco SD-Access wireless network deployments, the access points (APs) are part of the fabric overlay. This is because the fabric overlay is responsible for hosting the virtual networks where user and device traffic flows. APs form part of this virtual network infrastructure by integrating with the fabric edge nodes to build a Virtual Extensible LAN (VXLAN)-based distributed data plane for wireless clients. The overlay handles the encapsulation and routing of user traffic, ensuring that wireless traffic is properly tunneled and managed within the SD-Access architecture.
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?
Cisco SD Access Architecture is divided into 4 layers: Physical, network, controller and management layer. Overlay network and underlay network is defined in the network layer of Cisco SD Access Architecture. The quoted text are referring to the physical layer, ie. the components the physical network is comprised of.
the fabric AP also form a VXLAN tunnel to the up-stream switch for data plane traffics, means the users would stay within the overlay and connect directly to those switches in the fabric.
AP as equipment is part of the underlay
In the SD-Access solution, Cisco DNA Center configures wireless APs to reside within an overlay VN named INFRA_VN which maps to the global routing table. Ref: https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html
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)
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
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
A is correct
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.
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 ?
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
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