Unable to add a new availability zone to an existing load balancer

Question

Had created a Load balancer to added some EC2 instances to them and everything is working as expected. I cannot add a new availability zone to this load balancer. I need to add the new zone as an ec2 instance type that I want is not available in the zone that is already in the Load Balancer.

• When i try to add it from the command line, the Load Balancer itself is not recognized.
• From the UI, the edit instances on the load balancer is greyed out.

Any thoughts?

Thanks, Hemanth

Answer 1

You cannot add or remove an Availability Zone from a Network Load Balancer (TCP Load Balancer) after it's been created. You are going to have to create a new one.

From the AWS official docs for Network Load Balancer:

You enable one or more Availability Zones for your load balancer when you create it. You cannot enable or disable Availability Zones for a Network Load Balancer after you create it.