[otterley]

The real problem is that cloud providers don't provide out-of-the-box functionality to assign more than one IP to a network interface. If they did this, there wouldn't even be an issue.

I've been requesting this feature from the EC2 team at AWS for some time about this, to no avail. You can bind multiple interfaces (ENIs) to an instance (up to 6, I think, depending on the instance size), each with a separate IP address, but not multiple IPs to a single interface.

BGP, flannel, vxlan, etc. are IMO a waste of cycles and add needless complexity to what could otherwise be a very simple architecture.

[feisuzhu]

It's not a waste of cycles. You are just pushing your responsibilities to AWS, the cycles and memory for routing your additional IPs are required anyway.

[otterley]

Why do you think that maintaining the network should be my responsibility, as opposed to the provider's?