A cash-starved start-up firm is using AWS Storage Gateway to back up all on-premise data to Amazon S3. For this, they have set up VPN connectivity to VGW from client end devices using existing internet links. They are recently observing data backups taking a long time to complete due to large data size. They are also looking for an immediate resolution for quick data backup. Which of the following is a cost-effective way to faster data backups on the VPN tunnel?

Answer options:

A.Create a new VPN tunnel with ECMP enabled on a separate VGW.
B.Create a new VPN tunnel with ECMP enabled on the same VGW.
C.Create an additional VPN tunnel using a different VGW-Client end device
D.Enable ECMP with multiple VPN tunnels associated with a transit gateway.

Correct Answer – D
For each VPN Tunnel, AWS provides two different VPN endpoints. ECMP (Equal Cost Multi-Path) can be used to carry traffic on both VPN endpoints, increasing performance & faster data transfer.
Options A & B are incorrect because ECMP needs to be enabled through a transit gateway.
Option C is incorrect as creating a separate VPN tunnel will incur additional cost & will not enhance any performance without enabling ECMP.
For more information on AWS VPN performance, refer to the following URL-
https://aws.amazon.com/vpn/features/
https://aws.amazon.com/premiumsupport/knowledge-center/transit-gateway-ecmp-multiple-tunnels/