FCSS – SD-WAN Architect 7.4 — Question 1

You are planning a large SD-WAN deployment with approximately 1000 spokes and want to allow ADVPN between the spokes. Some remote sites use FortiSASE to connect to the company’s SD-WAN hub.
Which overlay routing configuration should you use?

Answer options

• A. BGP on loopback with IPsec phase2 selectors for ADVPN shortcut routing.
• B. BGP per overlay with dynamic BGP for ADVPN shortcut routing.
• C. BGP per overlay with BGP next-hop convergence for ADVPN shortcut routing.
• D. BGP on loopback with dynamic BGP for ADVPN shortcut routing.

Correct answer: D

Explanation

The correct answer is D because BGP on loopback with dynamic BGP effectively facilitates ADVPN shortcut routing by ensuring optimal path selection and quick convergence. Options A, B, and C do not provide the same level of flexibility and responsiveness required for a large deployment, particularly with the dynamic nature of ADVPN. Therefore, they are less suitable for this scenario.