We have a situation where we have multiple EC2 instances each running a VPN. Both the remote VPN server and remote subnet are run by a third-party and we have no say in the way they are setup.
We don't believe these are transferable to AWS client Lan-to-Lan VPN
The VPNs all route to the same physical subnet with the same CIDR block. There is some rate limiting for these VPNs (on the remote side) and we don't want to push all of our traffic for that CIDR block through the same subnet. Besides this we would like to have some form of health-check and fail-over so that if one VPN connection goes bad, we can re-route through another.
Does AWS have any form of transparent load-balanced routing? ...as opposed to an application load balancer. Likewise I believe AWS's Network load balancer acts as an endpoint routing specific ports to multiple providers.
Just to make this more complex, the VPN clients include a NAT meaning that the routing would need to be stateful.
This is something I'm aware is available on enterprise level hardware (cisco routers etc.) but I'm not sure if Amazon exposes any such feature.
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