A company hires a network architect to design a new OTT wireless solution within a Cisco SD-Access Fabric wired network. The architect wants to register access points to the WLC to centrally switch the traffic. Which AP mode must the design include?
In an OTT wireless deployment, traditional wireless access points (APs) and controllers (WLCs) operate outside the SD-Access fabric. APs connect to the WLC via CAPWAP tunnels, and the wireless traffic is tunneled through the SD-Access fabric to the WLC for centralized processing. This approach allows for centralized management without fully integrating wireless into the fabric.
In fabric mode, APs register to a WLC (Wireless LAN Controller) and integrate directly with the SD-Access fabric.
Traffic from the AP is encapsulated in VXLAN and sent across the fabric to the appropriate destination (e.g., exit node or another fabric AP).
This allows centralized switching and policy enforcement while benefiting from the SD-Access fabric’s segmentation and automation.
The question specifies an OTT deployment, not fabric-integrated wireless.
You want centralized switching, which local mode supports via CAPWAP to the WLC.
Fabric mode is only valid in fully fabric-integrated SD-Access wireless, which OTT explicitly is not.
The scenario involves designing an Over-The-Top (OTT) wireless solution within a Cisco SD-Access Fabric wired network, where the architect wants to register access points (APs) to the Wireless LAN Controller (WLC) and centrally switch the traffic. In Cisco SD-Access, the fabric mode is specifically designed for integrating wireless access points into the SD-Access fabric, enabling seamless policy enforcement and segmentation.
The requirement to "centrally switch the traffic" indicates that wireless traffic should be tunneled back to the WLC for processing, which aligns with both Local mode and Fabric mode.
However, since the design is within a Cisco SD-Access Fabric wired network, the wireless solution must integrate with the Fabric overlay. This requires the APs to support Fabric-specific features, such as VXLAN tunneling and alignment with the SD-Access control plane.
Fabric mode is the recommended and purpose-built AP mode for SD-Access wireless deployments. It ensures that APs register with the WLC and participate in the Fabric, enabling centralized switching while maintaining consistency with the SD-Access architecture.
Local mode can work with SD-Access if configured with a Fabric-enabled WLC, but it is not the native mode for Fabric integration and may require additional configuration to fully support SD-Access features.
A company hires a network architect to design a new OTT wireless solution within a Cisco SD-Access Fabric wired network.
The architect wants to register access points to the WLC to centrally switch the traffic. Which AP mode must the design include?
The requirement to "centrally switch the traffic" indicates that wireless traffic should be tunneled back to the WLC for processing, which aligns with both Local mode and Fabric mode.
However, since the design is within a Cisco SD-Access Fabric wired network, the wireless solution must integrate with the Fabric overlay. This requires the APs to support Fabric-specific features, such as VXLAN tunneling and alignment with the SD-Access control plane.
Fabric mode is the recommended and purpose-built AP mode for SD-Access wireless deployments. It ensures that APs register with the WLC and participate in the Fabric, enabling centralized switching while maintaining consistency with the SD-Access architecture.
Local mode can work with SD-Access if configured with a Fabric-enabled WLC, but it is not the native mode for Fabric integration and may require additional configuration to fully support SD-Access features.
Designing the wireless integration in SD-Access:
As mentioned earlier, there are two possible designs for deploying wireless with an SD-Access fabric:
• Cisco Unified Wireless Network wireless OTT: The SD-Access fabric is just an IP transport network, and wireless is a pure
overlay.
• SD-Access Wireless: Wireless is integrated into SD-Access and can leverage all the advantages of the fabric.
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Let's recap some of the important design considerations for OTT mode:
At FCS, the only mode supported as OTT is Centralized (AP local mode)
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Let's first figure out what's local and FlexConnect mean. Local switching means traffic flows from wireless client to network through APs bypassing WLCs, when centrally switching means traffic flows to network trough WLCs. But both of them FlexConnect architecture. Looks like the question not relevant.
local is the default, FlexConnect is option to locally switch on the AP itself, notably used at branch locations where there still should be a connection to WLC at data center/core
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