AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 214

You have two VPCs that you need to connect to an on-premises datacenter using VPNs. When you create the tunnels, you find that both tunnels use the same addresses. What two things can you do to overcome this? (Choose two.)

Answer options

• A. Delete the VPN, create a "dummy VPN", recreate the VPN, then delete the "dummy" VPN.
• B. Delete your AWS account and create a new one since the VPN tunnel addresses are created from a hash of your account number and a proprietary algorithm.
• C. Create a VHF within you router for each network.
• D. Create a VRF within your router for each network.

Correct answer: A, D

Explanation

The correct answer A allows you to reset the VPN configuration effectively, while answer D introduces a Virtual Routing and Forwarding instance, which can manage multiple routing tables and help avoid address conflicts. Options B and C are incorrect because deleting your AWS account is not a practical solution, and VHF does not address the issue of address uniqueness in this context.