error no VPC found AWS Lambda does not support Elastic IPs without using VPC

Question

Hi everyone,

I tried to attach an Elastic IP in AWS Lambda. But it shows me error, by saying that no VPC found. Why do we need a VPC for that?

Thank You

Answer 1

Hi@akhtar,

When you run Lambda outside your VPC it's likely running on a shared network out of your control.

When you run it in your VPC, the hosts running the function will attach a network interface provisioned inside your VPC, so you can route the traffic through a NAT gateway with fixed Elastic IPs.

Therefore the functionality of having fixed IPs is not directly implemented by Lambda but a side effect of running it in a VPC subnet routed through a NAT gateway.

Hope this will help.

Thank You