Which virtualization technology uses Layer 3 BFD to detect network failure between Network devices?

Question

Options

• ACisco Fabric path
• BVXLAN
• CVSAN
• DVLAN

• A
  91% (32)
• B
  3% (1)
• D
  6% (2)

Explanation

Cisco FabricPath is a Layer 2 multipath technology (based on IS-IS) used in Cisco Nexus data center fabrics. It uses BFD (Bidirectional Forwarding Detection) at Layer 3 to rapidly detect link and node failures in the fabric, enabling fast reconvergence. BFD provides sub-second failure detection that IS-IS alone cannot match. VXLAN (B) is an overlay encapsulation technology that does not inherently use BFD for fabric failure detection (though BFD can be layered on top in some deployments). VSAN (C) is a storage virtualization technology for Fibre Channel fabrics and is unrelated to BFD. VLAN (D) is a basic Layer 2 segmentation mechanism with no built-in failure detection protocol. FabricPath's use of BFD is a distinguishing architectural feature that enables it to meet data center resiliency requirements.

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