300-420 · Question #122
What is the role of a control-plane node in a Cisco SD-Access architecture?
The correct answer is B. map system that manages endpoint to device relationships. The control-plane node in Cisco SD-Access acts as a map system, typically using LISP, to manage endpoint location information by mapping endpoint identities (EIDs) to their routing locators (RLOCs) on fabric devices.
Question
What is the role of a control-plane node in a Cisco SD-Access architecture?
Options
- Afabric device that connects wired endpoints to the SD-Access fabric
- Bmap system that manages endpoint to device relationships
- Cfabric device that connects APs and wireless endpoints to the SD-Access fabric
- Dmap system that manages External Layer 3 networks
How the community answered
(40 responses)- B93% (37)
- C3% (1)
- D5% (2)
Why each option
The control-plane node in Cisco SD-Access acts as a map system, typically using LISP, to manage endpoint location information by mapping endpoint identities (EIDs) to their routing locators (RLOCs) on fabric devices.
A fabric device that connects wired endpoints to the SD-Access fabric is typically a fabric edge node, which is part of the data plane, not the control plane.
The control-plane node in Cisco SD-Access, commonly implemented using LISP (Location/ID Separation Protocol), functions as a map system that tracks and manages the relationship between an endpoint's identifier (EID) and its current routing locator (RLOC) on a fabric edge node, enabling host mobility and reachability.
A fabric device that connects APs and wireless endpoints to the SD-Access fabric is also a fabric edge node or a specialized wireless component, part of the data plane, not the control plane.
While the control plane tracks endpoint locations, managing External Layer 3 networks is primarily the function of a fabric border node, which connects the SD-Access fabric to external networks.
Concept tested: Cisco SD-Access control plane role
Source: https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html#_control_plane
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