title: Error: network interface must be attached to a supported instance - CreateTraffic Mirror Session
body: <p>I am trying to create a mirroring session from one ec2 instance in a public subnet ( the mirroring source) to another instance in a private subnet ( the mirroring target)</p>
  
  <p>When I tried to create the session and select the source network interface, I get an error that the selected network interface must be attached to a supported instance </p>
  
  <p>The interface is a primary interface ant its attachment status is attached </p>
  
  <p>I tried to create another interface and attache it manually then I used the interface for the mirroring session but I got the same error</p>
  
  <p><img src="https://i.stack.imgur.com/FAr8x.png" alt="the error message is &quot; eni-X must be attached to a supported instance&quot;"></p>