Requirements for AI Workloads:

The scenario requires a network that supports at least 400 Gbps Ethernet and does not require Layer

2 VLANs. This setup is well-suited for a pure Layer 3 network, which can efficiently route traffic

between devices without the overhead or complexity of maintaining Layer 2 domains.

Choosing the Right Network Architecture:

Option D: An IP fabric using EBGP (External BGP) is ideal for this scenario. In a typical IP fabric, EBGP

is used to handle routing between spine and leaf switches, creating a scalable and efficient network.

Since there is no need for Layer 2 VLANs, the pure IP fabric design with EBGP provides a

straightforward and effective solution.

Options A, B, and C involve more complex architectures (like VXLAN or EVPN), which are unnecessary

when there's no requirement for Layer 2 overlays or VLANs.

Conclusion:

Option D: Correct—An IP fabric with EBGP is the most suitable and straightforward architecture for a

network that needs to support high-speed AI workloads without Layer 2 VLANs.