What is the function of a fabric border node in a Cisco SD-Access environment?

Question

Options

• ATo collect traffic flow information toward external networks.
• BTo connect the Cisco SD-Access fabric to another fabric or external Layer 3 networks.
• CTo attach and register clients to the fabric.
• DTo handle an ordered list of IP addresses and locations for endpoints in the fabric.

• B
  95% (20)
• C
  5% (1)

Explanation

Fabric Border Node in Cisco SD-Access

A Border Node serves as the gateway between the SD-Access fabric and the outside world - it connects the fabric to external Layer 3 networks (like the internet, WAN, or other VRFs) or to other SD-Access fabrics, making Option B correct. Option A describes a NetFlow collector or telemetry function, not a border node role. Option C describes the Edge Node, which is responsible for onboarding and registering clients/endpoints to the fabric. Option D describes the Map Server/Resolver (Control Plane Node), which maintains the LISP mapping database of endpoint identifiers (EIDs) to routing locators (RLOCs).

Memory Tip: Think of the Border Node as the fabric's "border control" - just like customs at a country's border, it manages what enters and exits between your SD-Access fabric and the external network world. B = Border = Between networks.

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