400-007 · Question #68
Which protocol does an SD-Access wireless Access Point use for its fabric data plane?
The correct answer is C. VXLAN. In Cisco SD-Access, the fabric data plane uses VXLAN to encapsulate and transport traffic across the overlay. LISP handles the control plane mapping, while VXLAN handles actual data forwarding.
Question
Which protocol does an SD-Access wireless Access Point use for its fabric data plane?
Options
- AGRE
- BMPLS
- CVXLAN
- DLISP
- ECAPWAP
How the community answered
(51 responses)- A4% (2)
- B2% (1)
- C88% (45)
- E6% (3)
Why each option
In Cisco SD-Access, the fabric data plane uses VXLAN to encapsulate and transport traffic across the overlay. LISP handles the control plane mapping, while VXLAN handles actual data forwarding.
GRE is a generic point-to-point tunneling protocol and is not used as the fabric data plane encapsulation in SD-Access.
MPLS is a label-switching forwarding mechanism used in traditional WAN and service provider networks, not in the SD-Access fabric overlay.
VXLAN (Virtual Extensible LAN) is the encapsulation protocol used for the SD-Access fabric data plane overlay. It encapsulates Layer 2 and Layer 3 traffic within UDP packets for transport across the underlay network. LISP handles the control plane by mapping endpoint identifiers to routing locators, while VXLAN performs the actual data encapsulation and forwarding.
LISP serves as the SD-Access control plane protocol responsible for endpoint-to-location mapping, not as the data plane encapsulation.
CAPWAP is used for wireless AP management and control-plane communication between APs and the WLC, not for fabric data plane encapsulation.
Concept tested: SD-Access fabric data plane overlay encapsulation
Source: https://www.cisco.com/c/en/us/solutions/collateral/enterprise-networks/software-defined-access/nb-06-sd-access-sol-design-guide-cte-en.html
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