Which solution will improve the VPN throughput?
Implement multiple customer gateways for the same network to scale the throughput.
Use a transit gateway with equal cost multipath routing and add additional VPN tunnels.
Configure a virtual private gateway with equal cost multipath routing and multiple channels.
Increase the number of tunnels in the VPN configuration to scale the throughput beyond the default limit.
Explanations:
AWS Site-to-Site VPN does not support scaling throughput by adding multiple customer gateways for the same network.
Using a transit gateway with equal cost multipath (ECMP) routing allows multiple VPN tunnels to be used concurrently, increasing aggregate VPN throughput.
A virtual private gateway does not support ECMP routing for multiple tunnels; ECMP is available only with a transit gateway in AWS for load balancing across tunnels.
Increasing the number of tunnels alone does not scale throughput because only a transit gateway with ECMP can use multiple tunnels simultaneously.
From what I’ve heard, the answer is:
Use a transit gateway with equal cost multipath routing and add additional VPN tunnels.